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# HG changeset patch
# User emellor@xxxxxxxxxxxxxxxxxxxxxx
# Node ID 51484df99be1195e07d06021dabb414167993c40
# Parent 55f73916d319801065ffcdf6041b54e2770b9c03
# Parent 1a84eec7433193dc7277b7a84930e18d88475486
Merged.
---
linux-2.6-xen-sparse/drivers/xen/tpmfront/Makefile | 2
linux-2.6-xen-sparse/drivers/xen/tpmfront/tpmfront.c | 767 -----------
linux-2.6-xen-sparse/drivers/xen/tpmfront/tpmfront.h | 40
linux-2.6-xen-sparse/include/xen/tpmfe.h | 40
.hgignore | 2
docs/misc/vtpm.txt | 10
extras/mini-os/Makefile | 8
extras/mini-os/include/lib.h | 1
extras/mini-os/include/os.h | 3
extras/mini-os/include/types.h | 2
extras/mini-os/sched.c | 2
extras/mini-os/traps.c | 10
extras/mini-os/x86_32.S | 53
extras/mini-os/x86_64.S | 273 +---
linux-2.6-xen-sparse/arch/ia64/xen-mkbuildtree-pre | 22
linux-2.6-xen-sparse/drivers/char/tpm/Kconfig | 3
linux-2.6-xen-sparse/drivers/char/tpm/Makefile | 2
linux-2.6-xen-sparse/drivers/char/tpm/tpm_vtpm.c | 546 ++++++++
linux-2.6-xen-sparse/drivers/char/tpm/tpm_vtpm.h | 38
linux-2.6-xen-sparse/drivers/char/tpm/tpm_xen.c | 1247 +++++++++++--------
linux-2.6-xen-sparse/drivers/xen/Kconfig | 8
linux-2.6-xen-sparse/drivers/xen/Makefile | 1
linux-2.6-xen-sparse/drivers/xen/tpmback/common.h | 2
linux-2.6-xen-sparse/drivers/xen/tpmback/interface.c | 3
linux-2.6-xen-sparse/drivers/xen/tpmback/tpmback.c | 83 -
linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_xs.c | 2
linux-2.6-xen-sparse/include/asm-ia64/hypervisor.h | 1
linux-2.6-xen-sparse/mm/Kconfig | 6
tools/python/xen/xend/XendBootloader.py | 8
tools/python/xen/xend/XendDomainInfo.py | 5
tools/python/xen/xm/create.py | 17
xen/arch/x86/hvm/svm/svm.c | 72 -
xen/arch/x86/hvm/svm/vmcb.c | 55
xen/arch/x86/hvm/vmx/vmx.c | 41
xen/arch/x86/x86_32/mm.c | 15
xen/arch/x86/x86_64/mm.c | 18
36 files changed, 1635 insertions(+), 1773 deletions(-)
diff -r 55f73916d319 -r 51484df99be1 .hgignore
--- a/.hgignore Tue May 02 18:17:59 2006 +0100
+++ b/.hgignore Thu May 04 14:19:19 2006 +0100
@@ -14,6 +14,7 @@
.*\.orig$
.*\.rej$
.*/a\.out$
+.*cscope\.*$
^[^/]*\.bz2$
^TAGS$
^dist/.*$
@@ -184,7 +185,6 @@
^tools/xm-test/ramdisk/buildroot
^xen/BLOG$
^xen/TAGS$
-^xen/cscope\.*$
^xen/arch/x86/asm-offsets\.s$
^xen/arch/x86/boot/mkelf32$
^xen/arch/x86/xen\.lds$
diff -r 55f73916d319 -r 51484df99be1 docs/misc/vtpm.txt
--- a/docs/misc/vtpm.txt Tue May 02 18:17:59 2006 +0100
+++ b/docs/misc/vtpm.txt Thu May 04 14:19:19 2006 +0100
@@ -21,17 +21,23 @@ linux-2.6.??-xen/.config file:
linux-2.6.??-xen/.config file:
CONFIG_XEN_TPMDEV_BACKEND=y
-CONFIG_XEN_TPMDEV_GRANT=y
-CONFIG_TCG_TPM=m
+CONFIG_TCG_TPM=y
CONFIG_TCG_NSC=m
CONFIG_TCG_ATMEL=m
+CONFIG_TCG_XEN=y
You must also enable the virtual TPM to be built:
In Config.mk in the Xen root directory set the line
VTPM_TOOLS ?= y
+
+and in
+
+tools/vtpm/Rules.mk set the line
+
+BUILD_EMULATOR = y
Now build the Xen sources from Xen's root directory:
diff -r 55f73916d319 -r 51484df99be1 extras/mini-os/Makefile
--- a/extras/mini-os/Makefile Tue May 02 18:17:59 2006 +0100
+++ b/extras/mini-os/Makefile Thu May 04 14:19:19 2006 +0100
@@ -60,4 +60,12 @@ clean:
%.o: %.S $(HDRS) Makefile
$(CC) $(CFLAGS) -D__ASSEMBLY__ -c $< -o $@
+define all_sources
+ ( find . -follow -name SCCS -prune -o -name '*.[chS]' -print )
+endef
+.PHONY: cscope
+cscope:
+ $(all_sources) > cscope.files
+ cscope -k -b -q
+
diff -r 55f73916d319 -r 51484df99be1 extras/mini-os/include/lib.h
--- a/extras/mini-os/include/lib.h Tue May 02 18:17:59 2006 +0100
+++ b/extras/mini-os/include/lib.h Thu May 04 14:19:19 2006 +0100
@@ -56,6 +56,7 @@
#define _LIB_H_
#include <stdarg.h>
+#include <stddef.h>
#include <console.h>
/* printing */
diff -r 55f73916d319 -r 51484df99be1 extras/mini-os/include/os.h
--- a/extras/mini-os/include/os.h Tue May 02 18:17:59 2006 +0100
+++ b/extras/mini-os/include/os.h Thu May 04 14:19:19 2006 +0100
@@ -6,9 +6,6 @@
#ifndef _OS_H_
#define _OS_H_
-
-#define NULL 0
-
#if __GNUC__ == 2 && __GNUC_MINOR__ < 96
#define __builtin_expect(x, expected_value) (x)
diff -r 55f73916d319 -r 51484df99be1 extras/mini-os/include/types.h
--- a/extras/mini-os/include/types.h Tue May 02 18:17:59 2006 +0100
+++ b/extras/mini-os/include/types.h Thu May 04 14:19:19 2006 +0100
@@ -34,8 +34,6 @@ typedef unsigned long u64;
typedef unsigned long u64;
#endif
-typedef unsigned int size_t;
-
/* FreeBSD compat types */
typedef unsigned char u_char;
typedef unsigned int u_int;
diff -r 55f73916d319 -r 51484df99be1 extras/mini-os/sched.c
--- a/extras/mini-os/sched.c Tue May 02 18:17:59 2006 +0100
+++ b/extras/mini-os/sched.c Thu May 04 14:19:19 2006 +0100
@@ -324,7 +324,7 @@ void th_f2(void *data)
void init_sched(void)
{
- printk("Initialising scheduler, idle_thread %p\n", idle_thread);
+ printk("Initialising scheduler\n");
idle_thread = create_thread("Idle", idle_thread_fn, NULL);
INIT_LIST_HEAD(&idle_thread->thread_list);
diff -r 55f73916d319 -r 51484df99be1 extras/mini-os/traps.c
--- a/extras/mini-os/traps.c Tue May 02 18:17:59 2006 +0100
+++ b/extras/mini-os/traps.c Thu May 04 14:19:19 2006 +0100
@@ -123,8 +123,13 @@ void do_page_fault(struct pt_regs *regs,
void do_page_fault(struct pt_regs *regs, unsigned long error_code)
{
unsigned long addr = read_cr2();
- printk("Page fault at linear address %p, regs %p, code %lx\n", addr, regs,
- error_code);
+#if defined(__x86_64__)
+ printk("Page fault at linear address %p, rip %p, code %lx\n",
+ addr, regs->rip, error_code);
+#else
+ printk("Page fault at linear address %p, eip %p, code %lx\n",
+ addr, regs->eip, error_code);
+#endif
dump_regs(regs);
page_walk(addr);
do_exit();
@@ -195,7 +200,6 @@ static trap_info_t trap_table[] = {
{ 15, 0, __KERNEL_CS, (unsigned long)spurious_interrupt_bug },
{ 16, 0, __KERNEL_CS, (unsigned long)coprocessor_error },
{ 17, 0, __KERNEL_CS, (unsigned long)alignment_check },
- { 18, 0, __KERNEL_CS, (unsigned long)machine_check },
{ 19, 0, __KERNEL_CS, (unsigned long)simd_coprocessor_error },
{ 0, 0, 0, 0 }
};
diff -r 55f73916d319 -r 51484df99be1 extras/mini-os/x86_32.S
--- a/extras/mini-os/x86_32.S Tue May 02 18:17:59 2006 +0100
+++ b/extras/mini-os/x86_32.S Thu May 04 14:19:19 2006 +0100
@@ -30,10 +30,10 @@ hypercall_page:
hypercall_page:
.org 0x3000
-ES = 0x1c
-ORIG_EAX = 0x20
-EIP = 0x24
-CS = 0x28
+ES = 0x20
+ORIG_EAX = 0x24
+EIP = 0x28
+CS = 0x2C
#define ENTRY(X) .globl X ; X :
@@ -69,7 +69,7 @@ ENTRY(divide_error)
pushl $0 # no error code
pushl $do_divide_error
do_exception:
- pushl %ds
+ pushl %ds
pushl %eax
xorl %eax, %eax
pushl %ebp
@@ -92,7 +92,7 @@ do_exception:
pushl %edx
pushl %eax
call *%edi
- addl $8,%esp
+ jmp ret_from_exception
ret_from_exception:
movb CS(%esp),%cl
@@ -223,69 +223,54 @@ ENTRY(invalid_op)
pushl $do_invalid_op
jmp do_exception
+
ENTRY(coprocessor_segment_overrun)
pushl $0
pushl $do_coprocessor_segment_overrun
jmp do_exception
+
ENTRY(invalid_TSS)
pushl $do_invalid_TSS
jmp do_exception
+
ENTRY(segment_not_present)
pushl $do_segment_not_present
jmp do_exception
+
ENTRY(stack_segment)
pushl $do_stack_segment
jmp do_exception
+
ENTRY(general_protection)
pushl $do_general_protection
jmp do_exception
+
ENTRY(alignment_check)
pushl $do_alignment_check
jmp do_exception
-# This handler is special, because it gets an extra value on its stack,
-# which is the linear faulting address.
-# fastcall register usage: %eax = pt_regs, %edx = error code,
-# %ecx = fault address
+
ENTRY(page_fault)
- pushl %ds
- pushl %eax
- xorl %eax, %eax
- pushl %ebp
- pushl %edi
- pushl %esi
- pushl %edx
- decl %eax /* eax = -1 */
- pushl %ecx
- pushl %ebx
- cld
- movl ORIG_EAX(%esp), %edi
- movl %eax, ORIG_EAX(%esp)
- movl %es, %ecx
- movl %ecx, ES(%esp)
- movl $(__KERNEL_DS),%eax
- movl %eax, %ds
- movl %eax, %es
- pushl %edi
- movl %esp, %eax
- pushl %eax
- call do_page_fault
- jmp ret_from_exception
-
+ pushl $do_page_fault
+ jmp do_exception
+
ENTRY(machine_check)
pushl $0
pushl $do_machine_check
jmp do_exception
+
ENTRY(spurious_interrupt_bug)
pushl $0
pushl $do_spurious_interrupt_bug
jmp do_exception
+
+
ENTRY(thread_starter)
popl %eax
diff -r 55f73916d319 -r 51484df99be1 extras/mini-os/x86_64.S
--- a/extras/mini-os/x86_64.S Tue May 02 18:17:59 2006 +0100
+++ b/extras/mini-os/x86_64.S Thu May 04 14:19:19 2006 +0100
@@ -13,40 +13,6 @@
#define ENTRY(X) .globl X ; X :
.globl _start, shared_info, hypercall_page
-#define SAVE_ALL \
- cld; \
- pushq %rdi; \
- pushq %rsi; \
- pushq %rdx; \
- pushq %rcx; \
- pushq %rax; \
- pushq %r8; \
- pushq %r9; \
- pushq %r10; \
- pushq %r11; \
- pushq %rbx; \
- pushq %rbp; \
- pushq %r12; \
- pushq %r13; \
- pushq %r14; \
- pushq %r15;
-
-#define RESTORE_ALL \
- popq %r15; \
- popq %r14; \
- popq %r13; \
- popq %r12; \
- popq %rbp; \
- popq %rbx; \
- popq %r11; \
- popq %r10; \
- popq %r9; \
- popq %r8; \
- popq %rax; \
- popq %rcx; \
- popq %rdx; \
- popq %rsi; \
- popq %rdi
_start:
cld
@@ -240,7 +206,17 @@ error_call_handler:
# CFI_ENDPROC
.endm
-
+.macro errorentry sym
+# XCPT_FRAME
+ movq (%rsp),%rcx
+ movq 8(%rsp),%r11
+ addq $0x10,%rsp /* rsp points to the error code */
+ pushq %rax
+# CFI_ADJUST_CFA_OFFSET 8
+ leaq \sym(%rip),%rax
+ jmp error_entry
+# CFI_ENDPROC
+.endm
#define XEN_GET_VCPU_INFO(reg) movq HYPERVISOR_shared_info,reg
#define XEN_PUT_VCPU_INFO(reg)
@@ -319,159 +295,84 @@ ENTRY(failsafe_callback)
popq %r11
iretq
-error_code:
- SAVE_ALL
- movq %rsp,%rdi
- movl 15*8+4(%rsp),%eax
- leaq exception_table(%rip),%rdx
- callq *(%rdx,%rax,8)
- RESTORE_ALL
- addq $8,%rsp
- iretq
-
+
+ENTRY(coprocessor_error)
+ zeroentry do_coprocessor_error
+
+
+ENTRY(simd_coprocessor_error)
+ zeroentry do_simd_coprocessor_error
+
+
+ENTRY(device_not_available)
+ zeroentry do_device_not_available
+
+
+ENTRY(debug)
+# INTR_FRAME
+# CFI_ADJUST_CFA_OFFSET 8 */
+ zeroentry do_debug
+# CFI_ENDPROC
+
+
+ENTRY(int3)
+# INTR_FRAME
+# CFI_ADJUST_CFA_OFFSET 8 */
+ zeroentry do_int3
+# CFI_ENDPROC
+
+ENTRY(overflow)
+ zeroentry do_overflow
+
+
+ENTRY(bounds)
+ zeroentry do_bounds
+
+
+ENTRY(invalid_op)
+ zeroentry do_invalid_op
+
+
+ENTRY(coprocessor_segment_overrun)
+ zeroentry do_coprocessor_segment_overrun
+
+
+ENTRY(invalid_TSS)
+ errorentry do_invalid_TSS
+
+
+ENTRY(segment_not_present)
+ errorentry do_segment_not_present
+
+
+/* runs on exception stack */
+ENTRY(stack_segment)
+# XCPT_FRAME
+ errorentry do_stack_segment
+# CFI_ENDPROC
+
+
+ENTRY(general_protection)
+ errorentry do_general_protection
+
+
+ENTRY(alignment_check)
+ errorentry do_alignment_check
+
+
ENTRY(divide_error)
- popq %rcx
- popq %r11
- pushq $0
- movl $TRAP_divide_error,4(%rsp)
- jmp error_code
-
-ENTRY(coprocessor_error)
- popq %rcx
- popq %r11
- pushq $0
- movl $TRAP_copro_error,4(%rsp)
- jmp error_code
-
-ENTRY(simd_coprocessor_error)
- popq %rcx
- popq %r11
- pushq $0
- movl $TRAP_simd_error,4(%rsp)
- jmp error_code
-
-ENTRY(device_not_available)
- popq %rcx
- popq %r11
- movl $TRAP_no_device,4(%rsp)
- jmp error_code
-
-ENTRY(debug)
- popq %rcx
- popq %r11
- pushq $0
- movl $TRAP_debug,4(%rsp)
- jmp error_code
-
-ENTRY(int3)
- popq %rcx
- popq %r11
- pushq $0
- movl $TRAP_int3,4(%rsp)
- jmp error_code
-
-ENTRY(overflow)
- popq %rcx
- popq %r11
- pushq $0
- movl $TRAP_overflow,4(%rsp)
- jmp error_code
-
-ENTRY(bounds)
- popq %rcx
- popq %r11
- pushq $0
- movl $TRAP_bounds,4(%rsp)
- jmp error_code
-
-ENTRY(invalid_op)
- popq %rcx
- popq %r11
- pushq $0
- movl $TRAP_invalid_op,4(%rsp)
- jmp error_code
-
-ENTRY(coprocessor_segment_overrun)
- popq %rcx
- popq %r11
- pushq $0
- movl $TRAP_copro_seg,4(%rsp)
- jmp error_code
-
-ENTRY(invalid_TSS)
- popq %rcx
- popq %r11
- movl $TRAP_invalid_tss,4(%rsp)
- jmp error_code
-
-ENTRY(segment_not_present)
- popq %rcx
- popq %r11
- movl $TRAP_no_segment,4(%rsp)
- jmp error_code
-
-ENTRY(stack_segment)
- popq %rcx
- popq %r11
- movl $TRAP_stack_error,4(%rsp)
- jmp error_code
-
-ENTRY(general_protection)
- popq %rcx
- popq %r11
- movl $TRAP_gp_fault,4(%rsp)
- jmp error_code
-
-ENTRY(alignment_check)
- popq %rcx
- popq %r11
- movl $TRAP_alignment_check,4(%rsp)
- jmp error_code
-
-ENTRY(virt_cr2)
- .quad 0
+ zeroentry do_divide_error
+
+
+ENTRY(spurious_interrupt_bug)
+ zeroentry do_spurious_interrupt_bug
+
+
ENTRY(page_fault)
- popq %rcx
- popq %r11
- popq virt_cr2(%rip)
- movl $TRAP_page_fault,4(%rsp)
- jmp error_code
-
-ENTRY(machine_check)
- popq %rcx
- popq %r11
- pushq $0
- movl $TRAP_machine_check,4(%rsp)
- jmp error_code
-
-ENTRY(spurious_interrupt_bug)
- popq %rcx
- popq %r11
- pushq $0
- movl $TRAP_spurious_int,4(%rsp)
- jmp error_code
-
-ENTRY(exception_table)
- .quad do_divide_error
- .quad do_debug
- .quad 0 # nmi
- .quad do_int3
- .quad do_overflow
- .quad do_bounds
- .quad do_invalid_op
- .quad 0
- .quad 0
- .quad do_coprocessor_segment_overrun
- .quad do_invalid_TSS
- .quad do_segment_not_present
- .quad do_stack_segment
- .quad do_general_protection
- .quad do_page_fault
- .quad do_spurious_interrupt_bug
- .quad do_coprocessor_error
- .quad do_alignment_check
- .quad do_machine_check
- .quad do_simd_coprocessor_error
+ errorentry do_page_fault
+
+
+
ENTRY(thread_starter)
diff -r 55f73916d319 -r 51484df99be1
linux-2.6-xen-sparse/arch/ia64/xen-mkbuildtree-pre
--- a/linux-2.6-xen-sparse/arch/ia64/xen-mkbuildtree-pre Tue May 02
18:17:59 2006 +0100
+++ b/linux-2.6-xen-sparse/arch/ia64/xen-mkbuildtree-pre Thu May 04
14:19:19 2006 +0100
@@ -14,28 +14,12 @@ function try_to_mv() {
fi
}
-function try_to_mkdir() {
- if [ ! -e $2 ]
- then
- mv $1 $2
- mkdir $1
- fi
-}
-
-try_to_mkdir mm mm.xen-x86
-try_to_mv net net.xen-x86
-try_to_mv kernel kernel.xen-x86
-try_to_mv drivers/acpi/tables.c drivers/acpi/tables.c.xen-x86
-#try_to_mv arch/xen/kernel drivers/xen/core
-#try_to_mkdir arch/xen arch/xen.xen-x86
-#try_to_mv arch/xen.xen-x86/configs arch/xen
-#try_to_mv include/asm-generic include/asm-generic.xen-x86
-try_to_mkdir include/linux include/linux.xen-x86
+try_to_mv mm/Kconfig mm/Kconfig.xen-x86
# need to grab a couple of xen-modified files for generic_page_range and
# typedef pte_fn_t which are used by driver/xen blkif
-ln -sf ../mm.xen-x86/memory.c mm/
-ln -sf ../linux.xen-x86/mm.h include/linux/
+#ln -sf ../mm.xen-x86/memory.c mm/
+#ln -sf ../linux.xen-x86/mm.h include/linux/
#eventually asm-xsi-offsets needs to be part of hypervisor.h/hypercall.h
ln -sf ../../../../xen/include/asm-ia64/asm-xsi-offsets.h include/asm-ia64/xen/
diff -r 55f73916d319 -r 51484df99be1
linux-2.6-xen-sparse/drivers/char/tpm/Kconfig
--- a/linux-2.6-xen-sparse/drivers/char/tpm/Kconfig Tue May 02 18:17:59
2006 +0100
+++ b/linux-2.6-xen-sparse/drivers/char/tpm/Kconfig Thu May 04 14:19:19
2006 +0100
@@ -51,7 +51,7 @@ config TCG_INFINEON
config TCG_XEN
tristate "XEN TPM Interface"
- depends on TCG_TPM && XEN && XEN_TPMDEV_FRONTEND
+ depends on TCG_TPM && XEN
---help---
If you want to make TPM support available to a Xen
user domain, say Yes and it will
@@ -60,4 +60,3 @@ config TCG_XEN
tpm_xen.
endmenu
-
diff -r 55f73916d319 -r 51484df99be1
linux-2.6-xen-sparse/drivers/char/tpm/Makefile
--- a/linux-2.6-xen-sparse/drivers/char/tpm/Makefile Tue May 02 18:17:59
2006 +0100
+++ b/linux-2.6-xen-sparse/drivers/char/tpm/Makefile Thu May 04 14:19:19
2006 +0100
@@ -8,4 +8,4 @@ obj-$(CONFIG_TCG_NSC) += tpm_nsc.o
obj-$(CONFIG_TCG_NSC) += tpm_nsc.o
obj-$(CONFIG_TCG_ATMEL) += tpm_atmel.o
obj-$(CONFIG_TCG_INFINEON) += tpm_infineon.o
-obj-$(CONFIG_TCG_XEN) += tpm_xen.o
+obj-$(CONFIG_TCG_XEN) += tpm_xen.o tpm_vtpm.o
diff -r 55f73916d319 -r 51484df99be1
linux-2.6-xen-sparse/drivers/char/tpm/tpm_xen.c
--- a/linux-2.6-xen-sparse/drivers/char/tpm/tpm_xen.c Tue May 02 18:17:59
2006 +0100
+++ b/linux-2.6-xen-sparse/drivers/char/tpm/tpm_xen.c Thu May 04 14:19:19
2006 +0100
@@ -1,536 +1,767 @@
/*
- * Copyright (C) 2004 IBM Corporation
+ * Copyright (c) 2005, IBM Corporation
*
- * Authors:
- * Leendert van Doorn <leendert@xxxxxxxxxxxxxx>
- * Dave Safford <safford@xxxxxxxxxxxxxx>
- * Reiner Sailer <sailer@xxxxxxxxxxxxxx>
- * Kylene Hall <kjhall@xxxxxxxxxx>
- * Stefan Berger <stefanb@xxxxxxxxxx>
+ * Author: Stefan Berger, stefanb@xxxxxxxxxx
+ * Grant table support: Mahadevan Gomathisankaran
*
- * Maintained by: <tpmdd_devel@xxxxxxxxxxxxxxxxxxxxx>
+ * This code has been derived from drivers/xen/netfront/netfront.c
*
- * Device driver for TCG/TCPA TPM (trusted platform module) for XEN.
- * Specifications at www.trustedcomputinggroup.org
+ * Copyright (c) 2002-2004, K A Fraser
*
* This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation, version 2 of the
- * License.
+ * modify it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation; or, when distributed
+ * separately from the Linux kernel or incorporated into other
+ * software packages, subject to the following license:
*
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this source file (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy, modify,
+ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
*/
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/mutex.h>
#include <asm/uaccess.h>
-#include <linux/list.h>
-#include <xen/tpmfe.h>
-#include <linux/device.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include "tpm.h"
-
-/* read status bits */
-enum {
- STATUS_BUSY = 0x01,
- STATUS_DATA_AVAIL = 0x02,
- STATUS_READY = 0x04
+#include <xen/evtchn.h>
+#include <xen/interface/grant_table.h>
+#include <xen/interface/io/tpmif.h>
+#include <xen/xenbus.h>
+#include "tpm_vtpm.h"
+
+#undef DEBUG
+
+/* local structures */
+struct tpm_private {
+ tpmif_tx_interface_t *tx;
+ atomic_t refcnt;
+ unsigned int evtchn;
+ unsigned int irq;
+ u8 is_connected;
+ u8 is_suspended;
+
+ spinlock_t tx_lock;
+
+ struct tx_buffer *tx_buffers[TPMIF_TX_RING_SIZE];
+
+ atomic_t tx_busy;
+ void *tx_remember;
+ domid_t backend_id;
+ wait_queue_head_t wait_q;
+
+ struct xenbus_device *dev;
+ int ring_ref;
};
-#define MIN(x,y) ((x) < (y)) ? (x) : (y)
-
-struct transmission {
- struct list_head next;
- unsigned char *request;
- unsigned int request_len;
- unsigned char *rcv_buffer;
- unsigned int buffersize;
- unsigned int flags;
+struct tx_buffer {
+ unsigned int size; // available space in data
+ unsigned int len; // used space in data
+ unsigned char *data; // pointer to a page
};
-enum {
- TRANSMISSION_FLAG_WAS_QUEUED = 0x1
+
+/* locally visible variables */
+static grant_ref_t gref_head;
+static struct tpm_private *my_priv;
+
+/* local function prototypes */
+static irqreturn_t tpmif_int(int irq,
+ void *tpm_priv,
+ struct pt_regs *ptregs);
+static void tpmif_rx_action(unsigned long unused);
+static int tpmif_connect(struct xenbus_device *dev,
+ struct tpm_private *tp,
+ domid_t domid);
+static DECLARE_TASKLET(tpmif_rx_tasklet, tpmif_rx_action, 0);
+static int tpmif_allocate_tx_buffers(struct tpm_private *tp);
+static void tpmif_free_tx_buffers(struct tpm_private *tp);
+static void tpmif_set_connected_state(struct tpm_private *tp,
+ u8 newstate);
+static int tpm_xmit(struct tpm_private *tp,
+ const u8 * buf, size_t count, int userbuffer,
+ void *remember);
+static void destroy_tpmring(struct tpm_private *tp);
+
+#define DPRINTK(fmt, args...) \
+ pr_debug("xen_tpm_fr (%s:%d) " fmt, __FUNCTION__, __LINE__, ##args)
+#define IPRINTK(fmt, args...) \
+ printk(KERN_INFO "xen_tpm_fr: " fmt, ##args)
+#define WPRINTK(fmt, args...) \
+ printk(KERN_WARNING "xen_tpm_fr: " fmt, ##args)
+
+#define GRANT_INVALID_REF 0
+
+
+static inline int
+tx_buffer_copy(struct tx_buffer *txb, const u8 * src, int len,
+ int isuserbuffer)
+{
+ int copied = len;
+
+ if (len > txb->size) {
+ copied = txb->size;
+ }
+ if (isuserbuffer) {
+ if (copy_from_user(txb->data, src, copied))
+ return -EFAULT;
+ } else {
+ memcpy(txb->data, src, copied);
+ }
+ txb->len = len;
+ return copied;
+}
+
+static inline struct tx_buffer *tx_buffer_alloc(void)
+{
+ struct tx_buffer *txb = kzalloc(sizeof (struct tx_buffer),
+ GFP_KERNEL);
+
+ if (txb) {
+ txb->len = 0;
+ txb->size = PAGE_SIZE;
+ txb->data = (unsigned char *)__get_free_page(GFP_KERNEL);
+ if (txb->data == NULL) {
+ kfree(txb);
+ txb = NULL;
+ }
+ }
+ return txb;
+}
+
+
+static inline void tx_buffer_free(struct tx_buffer *txb)
+{
+ if (txb) {
+ free_page((long)txb->data);
+ kfree(txb);
+ }
+}
+
+/**************************************************************
+ Utility function for the tpm_private structure
+**************************************************************/
+static inline void tpm_private_init(struct tpm_private *tp)
+{
+ spin_lock_init(&tp->tx_lock);
+ init_waitqueue_head(&tp->wait_q);
+ atomic_set(&tp->refcnt, 1);
+}
+
+static inline void tpm_private_put(void)
+{
+ if ( atomic_dec_and_test(&my_priv->refcnt)) {
+ tpmif_free_tx_buffers(my_priv);
+ kfree(my_priv);
+ my_priv = NULL;
+ }
+}
+
+static struct tpm_private *tpm_private_get(void)
+{
+ int err;
+ if (!my_priv) {
+ my_priv = kzalloc(sizeof(struct tpm_private), GFP_KERNEL);
+ if (my_priv) {
+ tpm_private_init(my_priv);
+ err = tpmif_allocate_tx_buffers(my_priv);
+ if (err < 0) {
+ tpm_private_put();
+ }
+ }
+ } else {
+ atomic_inc(&my_priv->refcnt);
+ }
+ return my_priv;
+}
+
+/**************************************************************
+
+ The interface to let the tpm plugin register its callback
+ function and send data to another partition using this module
+
+**************************************************************/
+
+static DEFINE_MUTEX(suspend_lock);
+/*
+ * Send data via this module by calling this function
+ */
+int vtpm_vd_send(struct tpm_chip *chip,
+ struct tpm_private *tp,
+ const u8 * buf, size_t count, void *ptr)
+{
+ int sent;
+
+ mutex_lock(&suspend_lock);
+ sent = tpm_xmit(tp, buf, count, 0, ptr);
+ mutex_unlock(&suspend_lock);
+
+ return sent;
+}
+
+/**************************************************************
+ XENBUS support code
+**************************************************************/
+
+static int setup_tpmring(struct xenbus_device *dev,
+ struct tpm_private *tp)
+{
+ tpmif_tx_interface_t *sring;
+ int err;
+
+ tp->ring_ref = GRANT_INVALID_REF;
+
+ sring = (void *)__get_free_page(GFP_KERNEL);
+ if (!sring) {
+ xenbus_dev_fatal(dev, -ENOMEM, "allocating shared ring");
+ return -ENOMEM;
+ }
+ tp->tx = sring;
+
+ err = xenbus_grant_ring(dev, virt_to_mfn(tp->tx));
+ if (err < 0) {
+ free_page((unsigned long)sring);
+ tp->tx = NULL;
+ xenbus_dev_fatal(dev, err, "allocating grant reference");
+ goto fail;
+ }
+ tp->ring_ref = err;
+
+ err = tpmif_connect(dev, tp, dev->otherend_id);
+ if (err)
+ goto fail;
+
+ return 0;
+fail:
+ destroy_tpmring(tp);
+ return err;
+}
+
+
+static void destroy_tpmring(struct tpm_private *tp)
+{
+ tpmif_set_connected_state(tp, 0);
+
+ if (tp->ring_ref != GRANT_INVALID_REF) {
+ gnttab_end_foreign_access(tp->ring_ref, 0,
+ (unsigned long)tp->tx);
+ tp->ring_ref = GRANT_INVALID_REF;
+ tp->tx = NULL;
+ }
+
+ if (tp->irq)
+ unbind_from_irqhandler(tp->irq, tp);
+
+ tp->evtchn = tp->irq = 0;
+}
+
+
+static int talk_to_backend(struct xenbus_device *dev,
+ struct tpm_private *tp)
+{
+ const char *message = NULL;
+ int err;
+ xenbus_transaction_t xbt;
+
+ err = setup_tpmring(dev, tp);
+ if (err) {
+ xenbus_dev_fatal(dev, err, "setting up ring");
+ goto out;
+ }
+
+again:
+ err = xenbus_transaction_start(&xbt);
+ if (err) {
+ xenbus_dev_fatal(dev, err, "starting transaction");
+ goto destroy_tpmring;
+ }
+
+ err = xenbus_printf(xbt, dev->nodename,
+ "ring-ref","%u", tp->ring_ref);
+ if (err) {
+ message = "writing ring-ref";
+ goto abort_transaction;
+ }
+
+ err = xenbus_printf(xbt, dev->nodename,
+ "event-channel", "%u", tp->evtchn);
+ if (err) {
+ message = "writing event-channel";
+ goto abort_transaction;
+ }
+
+ err = xenbus_transaction_end(xbt, 0);
+ if (err == -EAGAIN)
+ goto again;
+ if (err) {
+ xenbus_dev_fatal(dev, err, "completing transaction");
+ goto destroy_tpmring;
+ }
+
+ xenbus_switch_state(dev, XenbusStateConnected);
+
+ return 0;
+
+abort_transaction:
+ xenbus_transaction_end(xbt, 1);
+ if (message)
+ xenbus_dev_error(dev, err, "%s", message);
+destroy_tpmring:
+ destroy_tpmring(tp);
+out:
+ return err;
+}
+
+/**
+ * Callback received when the backend's state changes.
+ */
+static void backend_changed(struct xenbus_device *dev,
+ XenbusState backend_state)
+{
+ struct tpm_private *tp = dev->data;
+ DPRINTK("\n");
+
+ switch (backend_state) {
+ case XenbusStateInitialising:
+ case XenbusStateInitWait:
+ case XenbusStateInitialised:
+ case XenbusStateUnknown:
+ break;
+
+ case XenbusStateConnected:
+ tpmif_set_connected_state(tp, 1);
+ break;
+
+ case XenbusStateClosing:
+ tpmif_set_connected_state(tp, 0);
+ break;
+
+ case XenbusStateClosed:
+ if (tp->is_suspended == 0) {
+ device_unregister(&dev->dev);
+ }
+ xenbus_switch_state(dev, XenbusStateClosed);
+ break;
+ }
+}
+
+
+static int tpmfront_probe(struct xenbus_device *dev,
+ const struct xenbus_device_id *id)
+{
+ int err;
+ int handle;
+ struct tpm_private *tp = tpm_private_get();
+
+ if (!tp)
+ return -ENOMEM;
+
+ err = xenbus_scanf(XBT_NULL, dev->nodename,
+ "handle", "%i", &handle);
+ if (XENBUS_EXIST_ERR(err))
+ return err;
+
+ if (err < 0) {
+ xenbus_dev_fatal(dev,err,"reading virtual-device");
+ return err;
+ }
+
+ tp->dev = dev;
+ dev->data = tp;
+
+ err = talk_to_backend(dev, tp);
+ if (err) {
+ tpm_private_put();
+ dev->data = NULL;
+ return err;
+ }
+ return 0;
+}
+
+
+static int tpmfront_remove(struct xenbus_device *dev)
+{
+ struct tpm_private *tp = (struct tpm_private *)dev->data;
+ destroy_tpmring(tp);
+ return 0;
+}
+
+static int tpmfront_suspend(struct xenbus_device *dev)
+{
+ struct tpm_private *tp = (struct tpm_private *)dev->data;
+ u32 ctr;
+
+ /* lock, so no app can send */
+ mutex_lock(&suspend_lock);
+ tp->is_suspended = 1;
+
+ for (ctr = 0; atomic_read(&tp->tx_busy) && ctr <= 25; ctr++) {
+ if ((ctr % 10) == 0)
+ printk("TPM-FE [INFO]: Waiting for outstanding
request.\n");
+ /*
+ * Wait for a request to be responded to.
+ */
+ interruptible_sleep_on_timeout(&tp->wait_q, 100);
+ }
+ xenbus_switch_state(dev, XenbusStateClosed);
+
+ if (atomic_read(&tp->tx_busy)) {
+ /*
+ * A temporary work-around.
+ */
+ printk("TPM-FE [WARNING]: Resetting busy flag.");
+ atomic_set(&tp->tx_busy, 0);
+ }
+
+ return 0;
+}
+
+static int tpmfront_resume(struct xenbus_device *dev)
+{
+ struct tpm_private *tp = (struct tpm_private *)dev->data;
+ destroy_tpmring(tp);
+ return talk_to_backend(dev, tp);
+}
+
+static int tpmif_connect(struct xenbus_device *dev,
+ struct tpm_private *tp,
+ domid_t domid)
+{
+ int err;
+
+ tp->backend_id = domid;
+
+ err = xenbus_alloc_evtchn(dev, &tp->evtchn);
+ if (err)
+ return err;
+
+ err = bind_evtchn_to_irqhandler(tp->evtchn,
+ tpmif_int, SA_SAMPLE_RANDOM, "tpmif",
+ tp);
+ if (err <= 0) {
+ WPRINTK("bind_evtchn_to_irqhandler failed (err=%d)\n", err);
+ return err;
+ }
+
+ tp->irq = err;
+ return 0;
+}
+
+static struct xenbus_device_id tpmfront_ids[] = {
+ { "vtpm" },
+ { "" }
};
-struct data_exchange {
- struct transmission *current_request;
- spinlock_t req_list_lock;
- wait_queue_head_t req_wait_queue;
-
- struct list_head queued_requests;
-
- struct transmission *current_response;
- spinlock_t resp_list_lock;
- wait_queue_head_t resp_wait_queue; // processes waiting for
responses
-
- struct transmission *req_cancelled; // if a cancellation was
encounterd
-
- unsigned int fe_status;
- unsigned int flags;
+static struct xenbus_driver tpmfront = {
+ .name = "vtpm",
+ .owner = THIS_MODULE,
+ .ids = tpmfront_ids,
+ .probe = tpmfront_probe,
+ .remove = tpmfront_remove,
+ .resume = tpmfront_resume,
+ .otherend_changed = backend_changed,
+ .suspend = tpmfront_suspend,
};
-enum {
- DATAEX_FLAG_QUEUED_ONLY = 0x1
+static void __init init_tpm_xenbus(void)
+{
+ xenbus_register_frontend(&tpmfront);
+}
+
+static void __exit exit_tpm_xenbus(void)
+{
+ xenbus_unregister_driver(&tpmfront);
+}
+
+static int tpmif_allocate_tx_buffers(struct tpm_private *tp)
+{
+ unsigned int i;
+
+ for (i = 0; i < TPMIF_TX_RING_SIZE; i++) {
+ tp->tx_buffers[i] = tx_buffer_alloc();
+ if (!tp->tx_buffers[i]) {
+ tpmif_free_tx_buffers(tp);
+ return -ENOMEM;
+ }
+ }
+ return 0;
+}
+
+static void tpmif_free_tx_buffers(struct tpm_private *tp)
+{
+ unsigned int i;
+
+ for (i = 0; i < TPMIF_TX_RING_SIZE; i++) {
+ tx_buffer_free(tp->tx_buffers[i]);
+ }
+}
+
+static void tpmif_rx_action(unsigned long priv)
+{
+ struct tpm_private *tp = (struct tpm_private *)priv;
+
+ int i = 0;
+ unsigned int received;
+ unsigned int offset = 0;
+ u8 *buffer;
+ tpmif_tx_request_t *tx;
+ tx = &tp->tx->ring[i].req;
+
+ atomic_set(&tp->tx_busy, 0);
+ wake_up_interruptible(&tp->wait_q);
+
+ received = tx->size;
+
+ buffer = kmalloc(received, GFP_ATOMIC);
+ if (NULL == buffer) {
+ goto exit;
+ }
+
+ for (i = 0; i < TPMIF_TX_RING_SIZE && offset < received; i++) {
+ struct tx_buffer *txb = tp->tx_buffers[i];
+ tpmif_tx_request_t *tx;
+ unsigned int tocopy;
+
+ tx = &tp->tx->ring[i].req;
+ tocopy = tx->size;
+ if (tocopy > PAGE_SIZE) {
+ tocopy = PAGE_SIZE;
+ }
+
+ memcpy(&buffer[offset], txb->data, tocopy);
+
+ gnttab_release_grant_reference(&gref_head, tx->ref);
+
+ offset += tocopy;
+ }
+
+ vtpm_vd_recv(buffer, received, tp->tx_remember);
+ kfree(buffer);
+
+exit:
+
+ return;
+}
+
+
+static irqreturn_t tpmif_int(int irq, void *tpm_priv, struct pt_regs *ptregs)
+{
+ struct tpm_private *tp = tpm_priv;
+ unsigned long flags;
+
+ spin_lock_irqsave(&tp->tx_lock, flags);
+ tpmif_rx_tasklet.data = (unsigned long)tp;
+ tasklet_schedule(&tpmif_rx_tasklet);
+ spin_unlock_irqrestore(&tp->tx_lock, flags);
+
+ return IRQ_HANDLED;
+}
+
+
+static int tpm_xmit(struct tpm_private *tp,
+ const u8 * buf, size_t count, int isuserbuffer,
+ void *remember)
+{
+ tpmif_tx_request_t *tx;
+ TPMIF_RING_IDX i;
+ unsigned int offset = 0;
+
+ spin_lock_irq(&tp->tx_lock);
+
+ if (unlikely(atomic_read(&tp->tx_busy))) {
+ printk("tpm_xmit: There's an outstanding request/response "
+ "on the way!\n");
+ spin_unlock_irq(&tp->tx_lock);
+ return -EBUSY;
+ }
+
+ if (tp->is_connected != 1) {
+ spin_unlock_irq(&tp->tx_lock);
+ return -EIO;
+ }
+
+ for (i = 0; count > 0 && i < TPMIF_TX_RING_SIZE; i++) {
+ struct tx_buffer *txb = tp->tx_buffers[i];
+ int copied;
+
+ if (NULL == txb) {
+ DPRINTK("txb (i=%d) is NULL. buffers initilized?\n"
+ "Not transmitting anything!\n", i);
+ spin_unlock_irq(&tp->tx_lock);
+ return -EFAULT;
+ }
+ copied = tx_buffer_copy(txb, &buf[offset], count,
+ isuserbuffer);
+ if (copied < 0) {
+ /* An error occurred */
+ spin_unlock_irq(&tp->tx_lock);
+ return copied;
+ }
+ count -= copied;
+ offset += copied;
+
+ tx = &tp->tx->ring[i].req;
+
+ tx->addr = virt_to_machine(txb->data);
+ tx->size = txb->len;
+
+ DPRINTK("First 4 characters sent by TPM-FE are 0x%02x 0x%02x
0x%02x 0x%02x\n",
+ txb->data[0],txb->data[1],txb->data[2],txb->data[3]);
+
+ /* get the granttable reference for this page */
+ tx->ref = gnttab_claim_grant_reference(&gref_head);
+
+ if (-ENOSPC == tx->ref) {
+ spin_unlock_irq(&tp->tx_lock);
+ DPRINTK(" Grant table claim reference failed in func:%s
line:%d file:%s\n", __FUNCTION__, __LINE__, __FILE__);
+ return -ENOSPC;
+ }
+ gnttab_grant_foreign_access_ref( tx->ref,
+ tp->backend_id,
+ (tx->addr >> PAGE_SHIFT),
+ 0 /*RW*/);
+ wmb();
+ }
+
+ atomic_set(&tp->tx_busy, 1);
+ tp->tx_remember = remember;
+ mb();
+
+ DPRINTK("Notifying backend via event channel %d\n",
+ tp->evtchn);
+
+ notify_remote_via_irq(tp->irq);
+
+ spin_unlock_irq(&tp->tx_lock);
+ return offset;
+}
+
+
+static void tpmif_notify_upperlayer(struct tpm_private *tp)
+{
+ /*
+ * Notify upper layer about the state of the connection
+ * to the BE.
+ */
+ if (tp->is_connected) {
+ vtpm_vd_status(TPM_VD_STATUS_CONNECTED);
+ } else {
+ vtpm_vd_status(TPM_VD_STATUS_DISCONNECTED);
+ }
+}
+
+
+static void tpmif_set_connected_state(struct tpm_private *tp, u8 is_connected)
+{
+ /*
+ * Don't notify upper layer if we are in suspend mode and
+ * should disconnect - assumption is that we will resume
+ * The mutex keeps apps from sending.
+ */
+ if (is_connected == 0 && tp->is_suspended == 1) {
+ return;
+ }
+
+ /*
+ * Unlock the mutex if we are connected again
+ * after being suspended - now resuming.
+ * This also removes the suspend state.
+ */
+ if (is_connected == 1 && tp->is_suspended == 1) {
+ tp->is_suspended = 0;
+ /* unlock, so apps can resume sending */
+ mutex_unlock(&suspend_lock);
+ }
+
+ if (is_connected != tp->is_connected) {
+ tp->is_connected = is_connected;
+ tpmif_notify_upperlayer(tp);
+ }
+}
+
+
+
+/* =================================================================
+ * Initialization function.
+ * =================================================================
+ */
+
+struct tpm_virtual_device tvd = {
+ .max_tx_size = PAGE_SIZE * TPMIF_TX_RING_SIZE,
};
-static struct data_exchange dataex;
-
-static unsigned long disconnect_time;
-
-static struct tpmfe_device tpmfe;
-
-/* local function prototypes */
-static void __exit cleanup_xen(void);
-
-
-/* =============================================================
- * Some utility functions
- * =============================================================
- */
-static inline struct transmission *
-transmission_alloc(void)
-{
- return kzalloc(sizeof(struct transmission), GFP_KERNEL);
-}
-
-static inline unsigned char *
-transmission_set_buffer(struct transmission *t,
- unsigned char *buffer, unsigned int len)
-{
- kfree(t->request);
- t->request = kmalloc(len, GFP_KERNEL);
- if (t->request) {
- memcpy(t->request,
- buffer,
- len);
- t->request_len = len;
- }
- return t->request;
-}
-
-static inline void
-transmission_free(struct transmission *t)
-{
- kfree(t->request);
- kfree(t->rcv_buffer);
- kfree(t);
-}
-
-/* =============================================================
- * Interface with the TPM shared memory driver for XEN
- * =============================================================
- */
-static int tpm_recv(const u8 *buffer, size_t count, const void *ptr)
-{
- int ret_size = 0;
- struct transmission *t;
-
- /*
- * The list with requests must contain one request
- * only and the element there must be the one that
- * was passed to me from the front-end.
- */
- if (dataex.current_request != ptr) {
- printk("WARNING: The request pointer is different than the "
- "pointer the shared memory driver returned to me. "
- "%p != %p\n",
- dataex.current_request, ptr);
- }
-
- /*
- * If the request has been cancelled, just quit here
- */
- if (dataex.req_cancelled == (struct transmission *)ptr) {
- if (dataex.current_request == dataex.req_cancelled) {
- dataex.current_request = NULL;
- }
- transmission_free(dataex.req_cancelled);
- dataex.req_cancelled = NULL;
- return 0;
- }
-
- if (NULL != (t = dataex.current_request)) {
- transmission_free(t);
- dataex.current_request = NULL;
- }
-
- t = transmission_alloc();
- if (t) {
- unsigned long flags;
- t->rcv_buffer = kmalloc(count, GFP_KERNEL);
- if (! t->rcv_buffer) {
- transmission_free(t);
- return -ENOMEM;
- }
- t->buffersize = count;
- memcpy(t->rcv_buffer, buffer, count);
- ret_size = count;
-
- spin_lock_irqsave(&dataex.resp_list_lock ,flags);
- dataex.current_response = t;
- spin_unlock_irqrestore(&dataex.resp_list_lock, flags);
- wake_up_interruptible(&dataex.resp_wait_queue);
- }
- return ret_size;
-}
-
-
-static void tpm_fe_status(unsigned int flags)
-{
- dataex.fe_status = flags;
- if ((dataex.fe_status & TPMFE_STATUS_CONNECTED) == 0) {
- disconnect_time = jiffies;
- }
-}
-
-/* =============================================================
- * Interface with the generic TPM driver
- * =============================================================
- */
-static int tpm_xen_recv(struct tpm_chip *chip, u8 * buf, size_t count)
-{
- unsigned long flags;
- int rc = 0;
-
- spin_lock_irqsave(&dataex.resp_list_lock, flags);
- /*
- * Check if the previous operation only queued the command
- * In this case there won't be a response, so I just
- * return from here and reset that flag. In any other
- * case I should receive a response from the back-end.
- */
- if ((dataex.flags & DATAEX_FLAG_QUEUED_ONLY) != 0) {
- dataex.flags &= ~DATAEX_FLAG_QUEUED_ONLY;
- spin_unlock_irqrestore(&dataex.resp_list_lock, flags);
- /*
- * a little hack here. The first few measurements
- * are queued since there's no way to talk to the
- * TPM yet (due to slowness of the control channel)
- * So we just make IMA happy by giving it 30 NULL
- * bytes back where the most important part is
- * that the result code is '0'.
- */
-
- count = MIN(count, 30);
- memset(buf, 0x0, count);
- return count;
- }
- /*
- * Check whether something is in the responselist and if
- * there's nothing in the list wait for something to appear.
- */
-
- if (NULL == dataex.current_response) {
- spin_unlock_irqrestore(&dataex.resp_list_lock, flags);
- interruptible_sleep_on_timeout(&dataex.resp_wait_queue,
- 1000);
- spin_lock_irqsave(&dataex.resp_list_lock ,flags);
- }
-
- if (NULL != dataex.current_response) {
- struct transmission *t = dataex.current_response;
- dataex.current_response = NULL;
- rc = MIN(count, t->buffersize);
- memcpy(buf, t->rcv_buffer, rc);
- transmission_free(t);
- }
-
- spin_unlock_irqrestore(&dataex.resp_list_lock, flags);
- return rc;
-}
-
-static int tpm_xen_send(struct tpm_chip *chip, u8 * buf, size_t count)
-{
- /*
- * We simply pass the packet onto the XEN shared
- * memory driver.
- */
- unsigned long flags;
+static int __init tpmif_init(void)
+{
int rc;
- struct transmission *t = transmission_alloc();
-
- spin_lock_irqsave(&dataex.req_list_lock, flags);
- /*
- * If there's a current request, it must be the
- * previous request that has timed out.
- */
- if (dataex.current_request != NULL) {
- printk("WARNING: Sending although there is a request
outstanding.\n"
- " Previous request must have timed out.\n");
- transmission_free(dataex.current_request);
- dataex.current_request = NULL;
- }
-
- if (t != NULL) {
- unsigned int error = 0;
- /*
- * Queue the packet if the driver below is not
- * ready, yet, or there is any packet already
- * in the queue.
- * If the driver below is ready, unqueue all
- * packets first before sending our current
- * packet.
- * For each unqueued packet, except for the
- * last (=current) packet, call the function
- * tpm_xen_recv to wait for the response to come
- * back.
- */
- if ((dataex.fe_status & TPMFE_STATUS_CONNECTED) == 0) {
- if (time_after(jiffies, disconnect_time + HZ * 10)) {
- rc = -ENOENT;
- } else {
- /*
- * copy the request into the buffer
- */
- if (transmission_set_buffer(t, buf, count)
- == NULL) {
- transmission_free(t);
- rc = -ENOMEM;
- goto exit;
- }
- dataex.flags |= DATAEX_FLAG_QUEUED_ONLY;
- list_add_tail(&t->next,
&dataex.queued_requests);
- rc = 0;
- }
- } else {
- /*
- * Check whether there are any packets in the queue
- */
- while (!list_empty(&dataex.queued_requests)) {
- /*
- * Need to dequeue them.
- * Read the result into a dummy buffer.
- */
- unsigned char buffer[1];
- struct transmission *qt = (struct transmission
*) dataex.queued_requests.next;
- list_del(&qt->next);
- dataex.current_request = qt;
- spin_unlock_irqrestore(&dataex.req_list_lock,
- flags);
-
- rc = tpm_fe_send(tpmfe.tpm_private,
- qt->request,
- qt->request_len,
- qt);
-
- if (rc < 0) {
-
spin_lock_irqsave(&dataex.req_list_lock, flags);
- if ((qt = dataex.current_request) !=
NULL) {
- /*
- * requeue it at the beginning
- * of the list
- */
- list_add(&qt->next,
-
&dataex.queued_requests);
- }
- dataex.current_request = NULL;
- error = 1;
- break;
- }
- /*
- * After this point qt is not valid anymore!
- * It is freed when the front-end is delivering
the data
- * by calling tpm_recv
- */
-
- /*
- * Try to receive the response now into the
provided dummy
- * buffer (I don't really care about this
response since
- * there is no receiver anymore for this
response)
- */
- rc = tpm_xen_recv(chip, buffer, sizeof(buffer));
-
- spin_lock_irqsave(&dataex.req_list_lock, flags);
- }
-
- if (error == 0) {
- /*
- * Finally, send the current request.
- */
- dataex.current_request = t;
- /*
- * Call the shared memory driver
- * Pass to it the buffer with the request, the
- * amount of bytes in the request and
- * a void * pointer (here: transmission
structure)
- */
- rc = tpm_fe_send(tpmfe.tpm_private,
- buf, count, t);
- /*
- * The generic TPM driver will call
- * the function to receive the response.
- */
- if (rc < 0) {
- dataex.current_request = NULL;
- goto queue_it;
- }
- } else {
-queue_it:
- if (transmission_set_buffer(t, buf, count) ==
NULL) {
- transmission_free(t);
- rc = -ENOMEM;
- goto exit;
- }
- /*
- * An error occurred. Don't event try
- * to send the current request. Just
- * queue it.
- */
- dataex.flags |= DATAEX_FLAG_QUEUED_ONLY;
- list_add_tail(&t->next,
- &dataex.queued_requests);
- rc = 0;
- }
- }
- } else {
- rc = -ENOMEM;
- }
-
-exit:
- spin_unlock_irqrestore(&dataex.req_list_lock, flags);
- return rc;
-}
-
-static void tpm_xen_cancel(struct tpm_chip *chip)
-{
- unsigned long flags;
- spin_lock_irqsave(&dataex.resp_list_lock,flags);
-
- dataex.req_cancelled = dataex.current_request;
-
- spin_unlock_irqrestore(&dataex.resp_list_lock,flags);
-}
-
-static u8 tpm_xen_status(struct tpm_chip *chip)
-{
- unsigned long flags;
- u8 rc = 0;
- spin_lock_irqsave(&dataex.resp_list_lock, flags);
- /*
- * Data are available if:
- * - there's a current response
- * - the last packet was queued only (this is fake, but necessary to
- * get the generic TPM layer to call the receive function.)
- */
- if (NULL != dataex.current_response ||
- 0 != (dataex.flags & DATAEX_FLAG_QUEUED_ONLY)) {
- rc = STATUS_DATA_AVAIL;
- }
- spin_unlock_irqrestore(&dataex.resp_list_lock, flags);
- return rc;
-}
-
-static struct file_operations tpm_xen_ops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .open = tpm_open,
- .read = tpm_read,
- .write = tpm_write,
- .release = tpm_release,
-};
-
-static DEVICE_ATTR(pubek, S_IRUGO, tpm_show_pubek, NULL);
-static DEVICE_ATTR(pcrs, S_IRUGO, tpm_show_pcrs, NULL);
-static DEVICE_ATTR(caps, S_IRUGO, tpm_show_caps, NULL);
-static DEVICE_ATTR(cancel, S_IWUSR |S_IWGRP, NULL, tpm_store_cancel);
-
-static struct attribute* xen_attrs[] = {
- &dev_attr_pubek.attr,
- &dev_attr_pcrs.attr,
- &dev_attr_caps.attr,
- &dev_attr_cancel.attr,
- NULL,
-};
-
-static struct attribute_group xen_attr_grp = { .attrs = xen_attrs };
-
-static struct tpm_vendor_specific tpm_xen = {
- .recv = tpm_xen_recv,
- .send = tpm_xen_send,
- .cancel = tpm_xen_cancel,
- .status = tpm_xen_status,
- .req_complete_mask = STATUS_BUSY | STATUS_DATA_AVAIL,
- .req_complete_val = STATUS_DATA_AVAIL,
- .req_canceled = STATUS_READY,
- .base = 0,
- .attr_group = &xen_attr_grp,
- .miscdev.fops = &tpm_xen_ops,
- .buffersize = 64 * 1024,
-};
-
-static struct platform_device *pdev;
-
-static struct tpmfe_device tpmfe = {
- .receive = tpm_recv,
- .status = tpm_fe_status,
-};
-
-
-static int __init init_xen(void)
-{
- int rc;
+ struct tpm_private *tp;
if ((xen_start_info->flags & SIF_INITDOMAIN)) {
return -EPERM;
}
- /*
- * Register device with the low lever front-end
- * driver
- */
- if ((rc = tpm_fe_register_receiver(&tpmfe)) < 0) {
- goto err_exit;
- }
-
- /*
- * Register our device with the system.
- */
- pdev = platform_device_register_simple("tpm_vtpm", -1, NULL, 0);
- if (IS_ERR(pdev)) {
- rc = PTR_ERR(pdev);
- goto err_unreg_fe;
- }
-
- tpm_xen.buffersize = tpmfe.max_tx_size;
-
- if ((rc = tpm_register_hardware(&pdev->dev, &tpm_xen)) < 0) {
- goto err_unreg_pdev;
- }
-
- dataex.current_request = NULL;
- spin_lock_init(&dataex.req_list_lock);
- init_waitqueue_head(&dataex.req_wait_queue);
- INIT_LIST_HEAD(&dataex.queued_requests);
-
- dataex.current_response = NULL;
- spin_lock_init(&dataex.resp_list_lock);
- init_waitqueue_head(&dataex.resp_wait_queue);
-
- disconnect_time = jiffies;
-
- return 0;
-
-
-err_unreg_pdev:
- platform_device_unregister(pdev);
-err_unreg_fe:
- tpm_fe_unregister_receiver();
-
-err_exit:
+
+ tp = tpm_private_get();
+ if (!tp) {
+ rc = -ENOMEM;
+ goto failexit;
+ }
+
+ tvd.tpm_private = tp;
+ rc = init_vtpm(&tvd);
+ if (rc)
+ goto init_vtpm_failed;
+
+ IPRINTK("Initialising the vTPM driver.\n");
+ if ( gnttab_alloc_grant_references ( TPMIF_TX_RING_SIZE,
+ &gref_head ) < 0) {
+ rc = -EFAULT;
+ goto gnttab_alloc_failed;
+ }
+
+ init_tpm_xenbus();
+ return 0;
+
+gnttab_alloc_failed:
+ cleanup_vtpm();
+init_vtpm_failed:
+ tpm_private_put();
+failexit:
+
return rc;
}
-static void __exit cleanup_xen(void)
-{
- struct tpm_chip *chip = dev_get_drvdata(&pdev->dev);
- if (chip) {
- tpm_remove_hardware(chip->dev);
- platform_device_unregister(pdev);
- tpm_fe_unregister_receiver();
- }
-}
-
-module_init(init_xen);
-module_exit(cleanup_xen);
-
-MODULE_AUTHOR("Stefan Berger (stefanb@xxxxxxxxxx)");
-MODULE_DESCRIPTION("TPM Driver for XEN (shared memory)");
-MODULE_VERSION("1.0");
-MODULE_LICENSE("GPL");
+
+static void __exit tpmif_exit(void)
+{
+ cleanup_vtpm();
+ tpm_private_put();
+ exit_tpm_xenbus();
+ gnttab_free_grant_references(gref_head);
+}
+
+module_init(tpmif_init);
+module_exit(tpmif_exit);
+
+MODULE_LICENSE("Dual BSD/GPL");
+
+/*
+ * Local variables:
+ * c-file-style: "linux"
+ * indent-tabs-mode: t
+ * c-indent-level: 8
+ * c-basic-offset: 8
+ * tab-width: 8
+ * End:
+ */
diff -r 55f73916d319 -r 51484df99be1 linux-2.6-xen-sparse/drivers/xen/Kconfig
--- a/linux-2.6-xen-sparse/drivers/xen/Kconfig Tue May 02 18:17:59 2006 +0100
+++ b/linux-2.6-xen-sparse/drivers/xen/Kconfig Thu May 04 14:19:19 2006 +0100
@@ -173,14 +173,6 @@ config XEN_BLKDEV_TAP
to a character device, allowing device prototyping in application
space. Odds are that you want to say N here.
-config XEN_TPMDEV_FRONTEND
- tristate "TPM-device frontend driver"
- default n
- select TCG_TPM
- select TCG_XEN
- help
- The TPM-device frontend driver.
-
config XEN_SCRUB_PAGES
bool "Scrub memory before freeing it to Xen"
default y
diff -r 55f73916d319 -r 51484df99be1 linux-2.6-xen-sparse/drivers/xen/Makefile
--- a/linux-2.6-xen-sparse/drivers/xen/Makefile Tue May 02 18:17:59 2006 +0100
+++ b/linux-2.6-xen-sparse/drivers/xen/Makefile Thu May 04 14:19:19 2006 +0100
@@ -16,7 +16,6 @@ obj-$(CONFIG_XEN_BLKDEV_FRONTEND) += blk
obj-$(CONFIG_XEN_BLKDEV_FRONTEND) += blkfront/
obj-$(CONFIG_XEN_NETDEV_FRONTEND) += netfront/
obj-$(CONFIG_XEN_BLKDEV_TAP) += blktap/
-obj-$(CONFIG_XEN_TPMDEV_FRONTEND) += tpmfront/
obj-$(CONFIG_XEN_PCIDEV_BACKEND) += pciback/
obj-$(CONFIG_XEN_PCIDEV_FRONTEND) += pcifront/
diff -r 55f73916d319 -r 51484df99be1
linux-2.6-xen-sparse/drivers/xen/tpmback/common.h
--- a/linux-2.6-xen-sparse/drivers/xen/tpmback/common.h Tue May 02 18:17:59
2006 +0100
+++ b/linux-2.6-xen-sparse/drivers/xen/tpmback/common.h Thu May 04 14:19:19
2006 +0100
@@ -50,6 +50,8 @@ typedef struct tpmif_st {
grant_handle_t shmem_handle;
grant_ref_t shmem_ref;
struct page *pagerange;
+
+ char devname[20];
} tpmif_t;
void tpmif_disconnect_complete(tpmif_t * tpmif);
diff -r 55f73916d319 -r 51484df99be1
linux-2.6-xen-sparse/drivers/xen/tpmback/interface.c
--- a/linux-2.6-xen-sparse/drivers/xen/tpmback/interface.c Tue May 02
18:17:59 2006 +0100
+++ b/linux-2.6-xen-sparse/drivers/xen/tpmback/interface.c Thu May 04
14:19:19 2006 +0100
@@ -32,6 +32,7 @@ static tpmif_t *alloc_tpmif(domid_t domi
tpmif->domid = domid;
tpmif->status = DISCONNECTED;
tpmif->tpm_instance = instance;
+ snprintf(tpmif->devname, sizeof(tpmif->devname), "tpmif%d", domid);
atomic_set(&tpmif->refcnt, 1);
tpmif->pagerange = balloon_alloc_empty_page_range(TPMIF_TX_RING_SIZE);
@@ -144,7 +145,7 @@ int tpmif_map(tpmif_t *tpmif, unsigned l
tpmif->tx = (tpmif_tx_interface_t *)tpmif->tx_area->addr;
tpmif->irq = bind_evtchn_to_irqhandler(
- tpmif->evtchn, tpmif_be_int, 0, "tpmif-backend", tpmif);
+ tpmif->evtchn, tpmif_be_int, 0, tpmif->devname, tpmif);
tpmif->shmem_ref = shared_page;
tpmif->active = 1;
diff -r 55f73916d319 -r 51484df99be1
linux-2.6-xen-sparse/drivers/xen/tpmback/tpmback.c
--- a/linux-2.6-xen-sparse/drivers/xen/tpmback/tpmback.c Tue May 02
18:17:59 2006 +0100
+++ b/linux-2.6-xen-sparse/drivers/xen/tpmback/tpmback.c Thu May 04
14:19:19 2006 +0100
@@ -28,7 +28,8 @@ struct data_exchange {
struct list_head pending_pak;
struct list_head current_pak;
unsigned int copied_so_far;
- u8 has_opener;
+ u8 has_opener:1;
+ u8 aborted:1;
rwlock_t pak_lock; // protects all of the previous fields
wait_queue_head_t wait_queue;
};
@@ -101,6 +102,16 @@ static inline int copy_to_buffer(void *t
return 0;
}
+
+static void dataex_init(struct data_exchange *dataex)
+{
+ INIT_LIST_HEAD(&dataex->pending_pak);
+ INIT_LIST_HEAD(&dataex->current_pak);
+ dataex->has_opener = 0;
+ rwlock_init(&dataex->pak_lock);
+ init_waitqueue_head(&dataex->wait_queue);
+}
+
/***************************************************************
Packet-related functions
***************************************************************/
@@ -148,11 +159,12 @@ static struct packet *packet_alloc(tpmif
u32 size, u8 req_tag, u8 flags)
{
struct packet *pak = NULL;
- pak = kzalloc(sizeof (struct packet), GFP_KERNEL);
+ pak = kzalloc(sizeof (struct packet), GFP_ATOMIC);
if (NULL != pak) {
if (tpmif) {
pak->tpmif = tpmif;
pak->tpm_instance = tpmif->tpm_instance;
+ tpmif_get(tpmif);
}
pak->data_len = size;
pak->req_tag = req_tag;
@@ -180,6 +192,9 @@ static void packet_free(struct packet *p
if (timer_pending(&pak->processing_timer)) {
BUG();
}
+
+ if (pak->tpmif)
+ tpmif_put(pak->tpmif);
kfree(pak->data_buffer);
/*
* cannot do tpmif_put(pak->tpmif); bad things happen
@@ -271,7 +286,6 @@ int _packet_write(struct packet *pak,
struct gnttab_map_grant_ref map_op;
struct gnttab_unmap_grant_ref unmap_op;
tpmif_tx_request_t *tx;
- unsigned long pfn, mfn, mfn_orig;
tx = &tpmif->tx->ring[i].req;
@@ -294,12 +308,6 @@ int _packet_write(struct packet *pak,
DPRINTK(" Grant table operation failure !\n");
return 0;
}
-
- pfn = __pa(MMAP_VADDR(tpmif, i)) >> PAGE_SHIFT;
- mfn = FOREIGN_FRAME(map_op.dev_bus_addr >> PAGE_SHIFT);
- mfn_orig = pfn_to_mfn(pfn);
-
- set_phys_to_machine(pfn, mfn);
tocopy = MIN(size - offset, PAGE_SIZE);
@@ -310,8 +318,6 @@ int _packet_write(struct packet *pak,
return -EFAULT;
}
tx->size = tocopy;
-
- set_phys_to_machine(pfn, mfn_orig);
gnttab_set_unmap_op(&unmap_op, MMAP_VADDR(tpmif, i),
GNTMAP_host_map, handle);
@@ -514,27 +520,41 @@ static ssize_t vtpm_op_read(struct file
unsigned long flags;
write_lock_irqsave(&dataex.pak_lock, flags);
+ if (dataex.aborted) {
+ dataex.aborted = 0;
+ dataex.copied_so_far = 0;
+ write_unlock_irqrestore(&dataex.pak_lock, flags);
+ return -EIO;
+ }
if (list_empty(&dataex.pending_pak)) {
write_unlock_irqrestore(&dataex.pak_lock, flags);
wait_event_interruptible(dataex.wait_queue,
!list_empty(&dataex.pending_pak));
write_lock_irqsave(&dataex.pak_lock, flags);
+ dataex.copied_so_far = 0;
}
if (!list_empty(&dataex.pending_pak)) {
unsigned int left;
+
pak = list_entry(dataex.pending_pak.next, struct packet, next);
-
left = pak->data_len - dataex.copied_so_far;
+ list_del(&pak->next);
+ write_unlock_irqrestore(&dataex.pak_lock, flags);
DPRINTK("size given by app: %d, available: %d\n", size, left);
ret_size = MIN(size, left);
ret_size = packet_read(pak, ret_size, data, size, 1);
+
+ write_lock_irqsave(&dataex.pak_lock, flags);
+
if (ret_size < 0) {
- ret_size = -EFAULT;
+ del_singleshot_timer_sync(&pak->processing_timer);
+ packet_free(pak);
+ dataex.copied_so_far = 0;
} else {
DPRINTK("Copied %d bytes to user buffer\n", ret_size);
@@ -545,7 +565,6 @@ static ssize_t vtpm_op_read(struct file
del_singleshot_timer_sync(&pak->
processing_timer);
- list_del(&pak->next);
list_add_tail(&pak->next, &dataex.current_pak);
/*
* The more fontends that are handled at the
same time,
@@ -554,6 +573,8 @@ static ssize_t vtpm_op_read(struct file
mod_timer(&pak->processing_timer,
jiffies + (num_frontends * 60 * HZ));
dataex.copied_so_far = 0;
+ } else {
+ list_add(&pak->next, &dataex.pending_pak);
}
}
}
@@ -601,8 +622,8 @@ static ssize_t vtpm_op_write(struct file
if (pak == NULL) {
write_unlock_irqrestore(&dataex.pak_lock, flags);
- printk(KERN_ALERT "No associated packet! (inst=%d)\n",
- ntohl(vrh.instance_no));
+ DPRINTK(KERN_ALERT "No associated packet! (inst=%d)\n",
+ ntohl(vrh.instance_no));
return -EFAULT;
}
@@ -784,15 +805,17 @@ static int tpm_send_fail_message(struct
return rc;
}
-static void _vtpm_release_packets(struct list_head *head,
- tpmif_t * tpmif, int send_msgs)
-{
+static int _vtpm_release_packets(struct list_head *head,
+ tpmif_t * tpmif, int send_msgs)
+{
+ int aborted = 0;
+ int c = 0;
struct packet *pak;
- struct list_head *pos,
- *tmp;
+ struct list_head *pos, *tmp;
list_for_each_safe(pos, tmp, head) {
pak = list_entry(pos, struct packet, next);
+ c += 1;
if (tpmif == NULL || pak->tpmif == tpmif) {
int can_send = 0;
@@ -808,8 +831,11 @@ static void _vtpm_release_packets(struct
tpm_send_fail_message(pak, pak->req_tag);
}
packet_free(pak);
- }
- }
+ if (c == 1)
+ aborted = 1;
+ }
+ }
+ return aborted;
}
int vtpm_release_packets(tpmif_t * tpmif, int send_msgs)
@@ -818,7 +844,9 @@ int vtpm_release_packets(tpmif_t * tpmif
write_lock_irqsave(&dataex.pak_lock, flags);
- _vtpm_release_packets(&dataex.pending_pak, tpmif, send_msgs);
+ dataex.aborted = _vtpm_release_packets(&dataex.pending_pak,
+ tpmif,
+ send_msgs);
_vtpm_release_packets(&dataex.current_pak, tpmif, send_msgs);
write_unlock_irqrestore(&dataex.pak_lock, flags);
@@ -1020,11 +1048,7 @@ static int __init tpmback_init(void)
return rc;
}
- INIT_LIST_HEAD(&dataex.pending_pak);
- INIT_LIST_HEAD(&dataex.current_pak);
- dataex.has_opener = 0;
- rwlock_init(&dataex.pak_lock);
- init_waitqueue_head(&dataex.wait_queue);
+ dataex_init(&dataex);
spin_lock_init(&tpm_schedule_list_lock);
INIT_LIST_HEAD(&tpm_schedule_list);
@@ -1041,6 +1065,7 @@ module_init(tpmback_init);
static void __exit tpmback_exit(void)
{
+ vtpm_release_packets(NULL, 0);
tpmif_xenbus_exit();
tpmif_interface_exit();
misc_deregister(&vtpms_miscdevice);
diff -r 55f73916d319 -r 51484df99be1
linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_xs.c
--- a/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_xs.c Tue May 02
18:17:59 2006 +0100
+++ b/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_xs.c Thu May 04
14:19:19 2006 +0100
@@ -183,7 +183,7 @@ void *xenbus_dev_request_and_reply(struc
mutex_unlock(&xs_state.request_mutex);
- if ((msg->type == XS_TRANSACTION_END) ||
+ if ((req_msg.type == XS_TRANSACTION_END) ||
((req_msg.type == XS_TRANSACTION_START) &&
(msg->type == XS_ERROR)))
up_read(&xs_state.suspend_mutex);
diff -r 55f73916d319 -r 51484df99be1
linux-2.6-xen-sparse/include/asm-ia64/hypervisor.h
--- a/linux-2.6-xen-sparse/include/asm-ia64/hypervisor.h Tue May 02
18:17:59 2006 +0100
+++ b/linux-2.6-xen-sparse/include/asm-ia64/hypervisor.h Thu May 04
14:19:19 2006 +0100
@@ -134,7 +134,6 @@ HYPERVISOR_poll(
#define pte_mfn(_x) pte_pfn(_x)
#define __pte_ma(_x) ((pte_t) {(_x)})
#define phys_to_machine_mapping_valid(_x) (1)
-#define kmap_flush_unused() do {} while (0)
#define pfn_pte_ma(_x,_y) __pte_ma(0)
#ifndef CONFIG_XEN_IA64_DOM0_VP //XXX
#define set_phys_to_machine(_x,_y) do {} while (0)
diff -r 55f73916d319 -r 51484df99be1 linux-2.6-xen-sparse/mm/Kconfig
--- a/linux-2.6-xen-sparse/mm/Kconfig Tue May 02 18:17:59 2006 +0100
+++ b/linux-2.6-xen-sparse/mm/Kconfig Thu May 04 14:19:19 2006 +0100
@@ -126,14 +126,14 @@ comment "Memory hotplug is currently inc
# Default to 4 for wider testing, though 8 might be more appropriate.
# ARM's adjust_pte (unused if VIPT) depends on mm-wide page_table_lock.
# PA-RISC 7xxx's spinlock_t would enlarge struct page from 32 to 44 bytes.
-# XEN uses the mapping field on pagetable pages to store a pointer to
-# the destructor.
+# XEN on x86 architecture uses the mapping field on pagetable pages to store a
+# pointer to the destructor. This conflicts with pte_lock_deinit().
#
config SPLIT_PTLOCK_CPUS
int
default "4096" if ARM && !CPU_CACHE_VIPT
default "4096" if PARISC && !PA20
- default "4096" if XEN
+ default "4096" if X86_XEN || X86_64_XEN
default "4"
#
diff -r 55f73916d319 -r 51484df99be1 tools/python/xen/xend/XendBootloader.py
--- a/tools/python/xen/xend/XendBootloader.py Tue May 02 18:17:59 2006 +0100
+++ b/tools/python/xen/xend/XendBootloader.py Thu May 04 14:19:19 2006 +0100
@@ -19,13 +19,13 @@ from XendLogging import log
from XendLogging import log
from XendError import VmError
-def bootloader(blexec, disk, quiet = 0, entry = None):
+def bootloader(blexec, disk, quiet = 0, blargs = None):
"""Run the boot loader executable on the given disk and return a
config image.
@param blexec Binary to use as the boot loader
@param disk Disk to run the boot loader on.
@param quiet Run in non-interactive mode, just booting the default.
- @param entry Default entry to boot."""
+ @param blargs Arguments to pass to the bootloader."""
if not os.access(blexec, os.X_OK):
msg = "Bootloader isn't executable"
@@ -48,8 +48,8 @@ def bootloader(blexec, disk, quiet = 0,
if quiet:
args.append("-q")
args.append("--output=%s" %(fifo,))
- if entry is not None:
- args.append("--entry=%s" %(entry,))
+ if blargs is not None:
+ args.extend(blargs.split())
args.append(disk)
try:
diff -r 55f73916d319 -r 51484df99be1 tools/python/xen/xend/XendDomainInfo.py
--- a/tools/python/xen/xend/XendDomainInfo.py Tue May 02 18:17:59 2006 +0100
+++ b/tools/python/xen/xend/XendDomainInfo.py Thu May 04 14:19:19 2006 +0100
@@ -132,6 +132,7 @@ ROUNDTRIPPING_CONFIG_ENTRIES = [
('memory', int),
('maxmem', int),
('bootloader', str),
+ ('bootloader_args', str),
('features', str),
]
@@ -571,6 +572,7 @@ class XendDomainInfo:
defaultInfo('memory', lambda: 0)
defaultInfo('maxmem', lambda: 0)
defaultInfo('bootloader', lambda: None)
+ defaultInfo('bootloader_args', lambda: None)
defaultInfo('backend', lambda: [])
defaultInfo('device', lambda: [])
defaultInfo('image', lambda: None)
@@ -1630,7 +1632,8 @@ class XendDomainInfo:
if disk is None:
continue
fn = blkdev_uname_to_file(disk)
- blcfg = bootloader(self.info['bootloader'], fn, 1)
+ blcfg = bootloader(self.info['bootloader'], fn, 1,
+ self.info['bootloader_args'])
break
if blcfg is None:
msg = "Had a bootloader specified, but can't find disk"
diff -r 55f73916d319 -r 51484df99be1 tools/python/xen/xm/create.py
--- a/tools/python/xen/xm/create.py Tue May 02 18:17:59 2006 +0100
+++ b/tools/python/xen/xm/create.py Thu May 04 14:19:19 2006 +0100
@@ -122,9 +122,13 @@ gopts.var('bootloader', val='FILE',
fn=set_value, default=None,
use="Path to bootloader.")
+gopts.var('bootargs', val='NAME',
+ fn=set_value, default=None,
+ use="Arguments to pass to boot loader")
+
gopts.var('bootentry', val='NAME',
fn=set_value, default=None,
- use="Entry to boot via boot loader")
+ use="DEPRECATED. Entry to boot via boot loader. Use bootargs.")
gopts.var('kernel', val='FILE',
fn=set_value, default=None,
@@ -620,8 +624,13 @@ def run_bootloader(vals):
(uname, dev, mode, backend) = vals.disk[0]
file = blkif.blkdev_uname_to_file(uname)
+ if vals.bootentry:
+ warn("The bootentry option is deprecated. Use bootargs and pass "
+ "--entry= directly.")
+ vals.bootargs = "--entry=%s" %(vals.bootentry,)
+
return bootloader(vals.bootloader, file, not vals.console_autoconnect,
- vals.bootentry)
+ vals.bootargs)
def make_config(vals):
"""Create the domain configuration.
@@ -654,8 +663,10 @@ def make_config(vals):
config.append(['backend', ['tpmif']])
if vals.bootloader:
+ config_image = run_bootloader(vals)
config.append(['bootloader', vals.bootloader])
- config_image = run_bootloader(vals)
+ if vals.bootargs:
+ config.append(['bootloader_args'], vals.bootargs)
else:
config_image = configure_image(vals)
config.append(['image', config_image])
diff -r 55f73916d319 -r 51484df99be1 xen/arch/x86/hvm/svm/svm.c
--- a/xen/arch/x86/hvm/svm/svm.c Tue May 02 18:17:59 2006 +0100
+++ b/xen/arch/x86/hvm/svm/svm.c Thu May 04 14:19:19 2006 +0100
@@ -79,6 +79,8 @@ void svm_dump_regs(const char *from, str
static void svm_relinquish_guest_resources(struct domain *d);
+/* Host save area */
+struct host_save_area *host_save_area[ NR_CPUS ] = {0};
static struct asid_pool ASIDpool[NR_CPUS];
/*
@@ -185,11 +187,16 @@ void stop_svm(void)
void stop_svm(void)
{
u32 eax, edx;
+ int cpu = smp_processor_id();
/* We turn off the EFER_SVME bit. */
rdmsr(MSR_EFER, eax, edx);
eax &= ~EFER_SVME;
wrmsr(MSR_EFER, eax, edx);
+
+ /* release the HSA */
+ free_host_save_area( host_save_area[ cpu ] );
+ host_save_area[ cpu ] = NULL;
printk("AMD SVM Extension is disabled.\n");
}
@@ -431,8 +438,11 @@ int start_svm(void)
int start_svm(void)
{
u32 eax, ecx, edx;
-
- /* Xen does not fill x86_capability words except 0. */
+ u32 phys_hsa_lo, phys_hsa_hi;
+ u64 phys_hsa;
+ int cpu = smp_processor_id();
+
+ /* Xen does not fill x86_capability words except 0. */
ecx = cpuid_ecx(0x80000001);
boot_cpu_data.x86_capability[5] = ecx;
@@ -443,7 +453,14 @@ int start_svm(void)
eax |= EFER_SVME;
wrmsr(MSR_EFER, eax, edx);
asidpool_init(smp_processor_id());
- printk("AMD SVM Extension is enabled for cpu %d.\n", smp_processor_id());
+ printk("AMD SVM Extension is enabled for cpu %d.\n", cpu );
+
+ /* Initialize the HSA for this core */
+ host_save_area[ cpu ] = alloc_host_save_area();
+ phys_hsa = (u64) virt_to_maddr( host_save_area[ cpu ] );
+ phys_hsa_lo = (u32) phys_hsa;
+ phys_hsa_hi = (u32) (phys_hsa >> 32);
+ wrmsr(MSR_K8_VM_HSAVE_PA, phys_hsa_lo, phys_hsa_hi);
/* Setup HVM interfaces */
hvm_funcs.disable = stop_svm;
@@ -546,20 +563,6 @@ void save_svm_cpu_user_regs(struct vcpu
ctxt->ds = vmcb->ds.sel;
}
-#if defined (__x86_64__)
-void svm_store_cpu_user_regs(struct cpu_user_regs *regs, struct vcpu *v )
-{
- struct vmcb_struct *vmcb = v->arch.hvm_svm.vmcb;
-
- regs->rip = vmcb->rip;
- regs->rsp = vmcb->rsp;
- regs->rflags = vmcb->rflags;
- regs->cs = vmcb->cs.sel;
- regs->ds = vmcb->ds.sel;
- regs->es = vmcb->es.sel;
- regs->ss = vmcb->ss.sel;
-}
-#elif defined (__i386__)
void svm_store_cpu_user_regs(struct cpu_user_regs *regs, struct vcpu *v)
{
struct vmcb_struct *vmcb = v->arch.hvm_svm.vmcb;
@@ -571,11 +574,11 @@ void svm_store_cpu_user_regs(struct cpu_
regs->ds = vmcb->ds.sel;
regs->es = vmcb->es.sel;
regs->ss = vmcb->ss.sel;
-}
-#endif
+ regs->fs = vmcb->fs.sel;
+ regs->gs = vmcb->gs.sel;
+}
/* XXX Use svm_load_cpu_guest_regs instead */
-#if defined (__i386__)
void svm_load_cpu_user_regs(struct vcpu *v, struct cpu_user_regs *regs)
{
struct vmcb_struct *vmcb = v->arch.hvm_svm.vmcb;
@@ -588,30 +591,17 @@ void svm_load_cpu_user_regs(struct vcpu
vmcb->rflags = regs->eflags;
vmcb->cs.sel = regs->cs;
vmcb->rip = regs->eip;
+
+ vmcb->ds.sel = regs->ds;
+ vmcb->es.sel = regs->es;
+ vmcb->fs.sel = regs->fs;
+ vmcb->gs.sel = regs->gs;
+
if (regs->eflags & EF_TF)
*intercepts |= EXCEPTION_BITMAP_DB;
else
*intercepts &= ~EXCEPTION_BITMAP_DB;
}
-#else /* (__i386__) */
-void svm_load_cpu_user_regs(struct vcpu *v, struct cpu_user_regs *regs)
-{
- struct vmcb_struct *vmcb = v->arch.hvm_svm.vmcb;
- u32 *intercepts = &v->arch.hvm_svm.vmcb->exception_intercepts;
-
- /* Write the guest register value into VMCB */
- vmcb->rax = regs->rax;
- vmcb->ss.sel = regs->ss;
- vmcb->rsp = regs->rsp;
- vmcb->rflags = regs->rflags;
- vmcb->cs.sel = regs->cs;
- vmcb->rip = regs->rip;
- if (regs->rflags & EF_TF)
- *intercepts |= EXCEPTION_BITMAP_DB;
- else
- *intercepts &= ~EXCEPTION_BITMAP_DB;
-}
-#endif /* !(__i386__) */
int svm_paging_enabled(struct vcpu *v)
{
@@ -735,10 +725,6 @@ static void svm_relinquish_guest_resourc
{
if ( !test_bit(_VCPUF_initialised, &v->vcpu_flags) )
continue;
-#if 0
- /* Memory leak by not freeing this. XXXKAF: *Why* is not per core?? */
- free_host_save_area(v->arch.hvm_svm.host_save_area);
-#endif
destroy_vmcb(&v->arch.hvm_svm);
free_monitor_pagetable(v);
diff -r 55f73916d319 -r 51484df99be1 xen/arch/x86/hvm/svm/vmcb.c
--- a/xen/arch/x86/hvm/svm/vmcb.c Tue May 02 18:17:59 2006 +0100
+++ b/xen/arch/x86/hvm/svm/vmcb.c Thu May 04 14:19:19 2006 +0100
@@ -36,9 +36,11 @@
#include <xen/kernel.h>
#include <xen/domain_page.h>
+extern struct host_save_area *host_save_area[];
extern int svm_dbg_on;
extern int asidpool_assign_next( struct vmcb_struct *vmcb, int retire_current,
int oldcore, int newcore);
+extern void set_hsa_to_guest( struct arch_svm_struct *arch_svm );
#define round_pgdown(_p) ((_p)&PAGE_MASK) /* coped from domain.c */
@@ -309,8 +311,6 @@ int construct_vmcb(struct arch_svm_struc
{
int error;
long rc=0;
- struct host_save_area *hsa = NULL;
- u64 phys_hsa;
memset(arch_svm, 0, sizeof(struct arch_svm_struct));
@@ -320,36 +320,9 @@ int construct_vmcb(struct arch_svm_struc
goto err_out;
}
- /*
- * The following code is for allocating host_save_area.
- * Note: We either allocate a Host Save Area per core or per VCPU.
- * However, we do not want a global data structure
- * for HSA per core, we decided to implement a HSA for each VCPU.
- * It will waste space since VCPU number is larger than core number.
- * But before we find a better place for HSA for each core, we will
- * stay will this solution.
- */
-
- if (!(hsa = alloc_host_save_area()))
- {
- printk("Failed to allocate Host Save Area\n");
- rc = -ENOMEM;
- goto err_out;
- }
-
- phys_hsa = (u64) virt_to_maddr(hsa);
- arch_svm->host_save_area = hsa;
- arch_svm->host_save_pa = phys_hsa;
-
+ /* update the HSA for the current Core */
+ set_hsa_to_guest( arch_svm );
arch_svm->vmcb_pa = (u64) virt_to_maddr(arch_svm->vmcb);
-
- if ((error = load_vmcb(arch_svm, arch_svm->host_save_pa)))
- {
- printk("construct_vmcb: load_vmcb failed: VMCB = %lx\n",
- (unsigned long) arch_svm->host_save_pa);
- rc = -EINVAL;
- goto err_out;
- }
if ((error = construct_vmcb_controls(arch_svm)))
{
@@ -458,18 +431,11 @@ void svm_do_launch(struct vcpu *v)
}
-int load_vmcb(struct arch_svm_struct *arch_svm, u64 phys_hsa)
-{
- u32 phys_hsa_lo, phys_hsa_hi;
-
- phys_hsa_lo = (u32) phys_hsa;
- phys_hsa_hi = (u32) (phys_hsa >> 32);
-
- wrmsr(MSR_K8_VM_HSAVE_PA, phys_hsa_lo, phys_hsa_hi);
- set_bit(ARCH_SVM_VMCB_LOADED, &arch_svm->flags);
- return 0;
-}
-
+void set_hsa_to_guest( struct arch_svm_struct *arch_svm )
+{
+ arch_svm->host_save_area = host_save_area[ smp_processor_id() ];
+ arch_svm->host_save_pa = (u64)virt_to_maddr( arch_svm->host_save_area );
+}
/*
* Resume the guest.
@@ -481,6 +447,9 @@ void svm_do_resume(struct vcpu *v)
struct hvm_time_info *time_info = &vpit->time_info;
svm_stts(v);
+
+ /* make sure the HSA is set for the current core */
+ set_hsa_to_guest( &v->arch.hvm_svm );
/* pick up the elapsed PIT ticks and re-enable pit_timer */
if ( time_info->first_injected ) {
diff -r 55f73916d319 -r 51484df99be1 xen/arch/x86/hvm/vmx/vmx.c
--- a/xen/arch/x86/hvm/vmx/vmx.c Tue May 02 18:17:59 2006 +0100
+++ b/xen/arch/x86/hvm/vmx/vmx.c Thu May 04 14:19:19 2006 +0100
@@ -475,6 +475,45 @@ static void vmx_store_cpu_guest_regs(
__vmptrld(virt_to_maddr(current->arch.hvm_vmx.vmcs));
}
+/*
+ * The VMX spec (section 4.3.1.2, Checks on Guest Segment
+ * Registers) says that virtual-8086 mode guests' segment
+ * base-address fields in the VMCS must be equal to their
+ * corresponding segment selector field shifted right by
+ * four bits upon vmentry.
+ *
+ * This function (called only for VM86-mode guests) fixes
+ * the bases to be consistent with the selectors in regs
+ * if they're not already. Without this, we can fail the
+ * vmentry check mentioned above.
+ */
+static void fixup_vm86_seg_bases(struct cpu_user_regs *regs)
+{
+ int err = 0;
+ unsigned long base;
+
+ err |= __vmread(GUEST_ES_BASE, &base);
+ if (regs->es << 4 != base)
+ err |= __vmwrite(GUEST_ES_BASE, regs->es << 4);
+ err |= __vmread(GUEST_CS_BASE, &base);
+ if (regs->cs << 4 != base)
+ err |= __vmwrite(GUEST_CS_BASE, regs->cs << 4);
+ err |= __vmread(GUEST_SS_BASE, &base);
+ if (regs->ss << 4 != base)
+ err |= __vmwrite(GUEST_SS_BASE, regs->ss << 4);
+ err |= __vmread(GUEST_DS_BASE, &base);
+ if (regs->ds << 4 != base)
+ err |= __vmwrite(GUEST_DS_BASE, regs->ds << 4);
+ err |= __vmread(GUEST_FS_BASE, &base);
+ if (regs->fs << 4 != base)
+ err |= __vmwrite(GUEST_FS_BASE, regs->fs << 4);
+ err |= __vmread(GUEST_GS_BASE, &base);
+ if (regs->gs << 4 != base)
+ err |= __vmwrite(GUEST_GS_BASE, regs->gs << 4);
+
+ BUG_ON(err);
+}
+
void vmx_load_cpu_guest_regs(struct vcpu *v, struct cpu_user_regs *regs)
{
if ( v != current )
@@ -511,6 +550,8 @@ void vmx_load_cpu_guest_regs(struct vcpu
__vm_set_bit(EXCEPTION_BITMAP, EXCEPTION_BITMAP_DB);
else
__vm_clear_bit(EXCEPTION_BITMAP, EXCEPTION_BITMAP_DB);
+ if (regs->eflags & EF_VM)
+ fixup_vm86_seg_bases(regs);
__vmwrite(GUEST_CS_SELECTOR, regs->cs);
__vmwrite(GUEST_RIP, regs->eip);
diff -r 55f73916d319 -r 51484df99be1 xen/arch/x86/x86_32/mm.c
--- a/xen/arch/x86/x86_32/mm.c Tue May 02 18:17:59 2006 +0100
+++ b/xen/arch/x86/x86_32/mm.c Thu May 04 14:19:19 2006 +0100
@@ -155,17 +155,10 @@ void subarch_init_memory(void)
* 64-bit operations on them. Also, just for sanity, we assert the size
* of the structure here.
*/
- if ( (offsetof(struct page_info, u.inuse._domain) !=
- (offsetof(struct page_info, count_info) + sizeof(u32))) ||
- ((offsetof(struct page_info, count_info) & 7) != 0) ||
- (sizeof(struct page_info) != 24) )
- {
- printk("Weird page_info layout (%ld,%ld,%d)\n",
- offsetof(struct page_info, count_info),
- offsetof(struct page_info, u.inuse._domain),
- sizeof(struct page_info));
- BUG();
- }
+ BUILD_BUG_ON(offsetof(struct page_info, u.inuse._domain) !=
+ (offsetof(struct page_info, count_info) + sizeof(u32)));
+ BUILD_BUG_ON((offsetof(struct page_info, count_info) & 7) != 0);
+ BUILD_BUG_ON(sizeof(struct page_info) != 24);
/* M2P table is mappable read-only by privileged domains. */
for ( i = 0; i < (mpt_size >> L2_PAGETABLE_SHIFT); i++ )
diff -r 55f73916d319 -r 51484df99be1 xen/arch/x86/x86_64/mm.c
--- a/xen/arch/x86/x86_64/mm.c Tue May 02 18:17:59 2006 +0100
+++ b/xen/arch/x86/x86_64/mm.c Thu May 04 14:19:19 2006 +0100
@@ -145,19 +145,11 @@ void subarch_init_memory(void)
* count_info and domain fields must be adjacent, as we perform atomic
* 64-bit operations on them.
*/
- if ( ((offsetof(struct page_info, u.inuse._domain) !=
- (offsetof(struct page_info, count_info) + sizeof(u32)))) ||
- ((offsetof(struct page_info, count_info) & 7) != 0) ||
- (sizeof(struct page_info) !=
- (32 + BITS_TO_LONGS(NR_CPUS)*sizeof(long))) )
- {
- printk("Weird page_info layout (%ld,%ld,%ld,%ld)\n",
- offsetof(struct page_info, count_info),
- offsetof(struct page_info, u.inuse._domain),
- sizeof(struct page_info),
- 32 + BITS_TO_LONGS(NR_CPUS)*sizeof(long));
- for ( ; ; ) ;
- }
+ BUILD_BUG_ON(offsetof(struct page_info, u.inuse._domain) !=
+ (offsetof(struct page_info, count_info) + sizeof(u32)));
+ BUILD_BUG_ON((offsetof(struct page_info, count_info) & 7) != 0);
+ BUILD_BUG_ON(sizeof(struct page_info) !=
+ (32 + BITS_TO_LONGS(NR_CPUS)*sizeof(long)));
/* M2P table is mappable read-only by privileged domains. */
for ( v = RDWR_MPT_VIRT_START;
diff -r 55f73916d319 -r 51484df99be1
linux-2.6-xen-sparse/drivers/char/tpm/tpm_vtpm.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/linux-2.6-xen-sparse/drivers/char/tpm/tpm_vtpm.c Thu May 04 14:19:19
2006 +0100
@@ -0,0 +1,546 @@
+/*
+ * Copyright (C) 2006 IBM Corporation
+ *
+ * Authors:
+ * Stefan Berger <stefanb@xxxxxxxxxx>
+ *
+ * Generic device driver part for device drivers in a virtualized
+ * environment.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, version 2 of the
+ * License.
+ *
+ */
+
+#include <asm/uaccess.h>
+#include <linux/list.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include "tpm.h"
+#include "tpm_vtpm.h"
+
+/* read status bits */
+enum {
+ STATUS_BUSY = 0x01,
+ STATUS_DATA_AVAIL = 0x02,
+ STATUS_READY = 0x04
+};
+
+#define MIN(x,y) ((x) < (y)) ? (x) : (y)
+
+struct transmission {
+ struct list_head next;
+
+ unsigned char *request;
+ size_t request_len;
+ size_t request_buflen;
+
+ unsigned char *response;
+ size_t response_len;
+ size_t response_buflen;
+
+ unsigned int flags;
+};
+
+enum {
+ TRANSMISSION_FLAG_WAS_QUEUED = 0x1
+};
+
+struct vtpm_state {
+ struct transmission *current_request;
+ spinlock_t req_list_lock;
+ wait_queue_head_t req_wait_queue;
+
+ struct list_head queued_requests;
+
+ struct transmission *current_response;
+ spinlock_t resp_list_lock;
+ wait_queue_head_t resp_wait_queue; // processes waiting for
responses
+
+ struct transmission *req_cancelled; // if a cancellation was
encounterd
+
+ u8 vd_status;
+ u8 flags;
+
+ unsigned long disconnect_time;
+
+ struct tpm_virtual_device *tpmvd;
+};
+
+enum {
+ DATAEX_FLAG_QUEUED_ONLY = 0x1
+};
+
+
+/* local variables */
+static struct vtpm_state *vtpms;
+
+/* local function prototypes */
+static int _vtpm_send_queued(struct tpm_chip *chip);
+
+
+/* =============================================================
+ * Some utility functions
+ * =============================================================
+ */
+static void vtpm_state_init(struct vtpm_state *vtpms)
+{
+ vtpms->current_request = NULL;
+ spin_lock_init(&vtpms->req_list_lock);
+ init_waitqueue_head(&vtpms->req_wait_queue);
+ INIT_LIST_HEAD(&vtpms->queued_requests);
+
+ vtpms->current_response = NULL;
+ spin_lock_init(&vtpms->resp_list_lock);
+ init_waitqueue_head(&vtpms->resp_wait_queue);
+
+ vtpms->disconnect_time = jiffies;
+}
+
+
+static inline struct transmission *transmission_alloc(void)
+{
+ return kzalloc(sizeof(struct transmission), GFP_ATOMIC);
+}
+
+static unsigned char *
+transmission_set_req_buffer(struct transmission *t,
+ unsigned char *buffer, size_t len)
+{
+ if (t->request_buflen < len) {
+ kfree(t->request);
+ t->request = kmalloc(len, GFP_KERNEL);
+ if (!t->request) {
+ t->request_buflen = 0;
+ return NULL;
+ }
+ t->request_buflen = len;
+ }
+
+ memcpy(t->request, buffer, len);
+ t->request_len = len;
+
+ return t->request;
+}
+
+static unsigned char *
+transmission_set_res_buffer(struct transmission *t,
+ const unsigned char *buffer, size_t len)
+{
+ if (t->response_buflen < len) {
+ kfree(t->response);
+ t->response = kmalloc(len, GFP_ATOMIC);
+ if (!t->response) {
+ t->response_buflen = 0;
+ return NULL;
+ }
+ t->response_buflen = len;
+ }
+
+ memcpy(t->response, buffer, len);
+ t->response_len = len;
+
+ return t->response;
+}
+
+static inline void transmission_free(struct transmission *t)
+{
+ kfree(t->request);
+ kfree(t->response);
+ kfree(t);
+}
+
+/* =============================================================
+ * Interface with the lower layer driver
+ * =============================================================
+ */
+/*
+ * Lower layer uses this function to make a response available.
+ */
+int vtpm_vd_recv(const unsigned char *buffer, size_t count, const void *ptr)
+{
+ unsigned long flags;
+ int ret_size = 0;
+ struct transmission *t;
+
+ /*
+ * The list with requests must contain one request
+ * only and the element there must be the one that
+ * was passed to me from the front-end.
+ */
+ spin_lock_irqsave(&vtpms->resp_list_lock, flags);
+ if (vtpms->current_request != ptr) {
+ printk("WARNING: The request pointer is different than the "
+ "pointer the shared memory driver returned to me. "
+ "%p != %p\n",
+ vtpms->current_request, ptr);
+ }
+
+ /*
+ * If the request has been cancelled, just quit here
+ */
+ if (vtpms->req_cancelled == (struct transmission *)ptr) {
+ if (vtpms->current_request == vtpms->req_cancelled) {
+ vtpms->current_request = NULL;
+ }
+ transmission_free(vtpms->req_cancelled);
+ vtpms->req_cancelled = NULL;
+ spin_unlock_irqrestore(&vtpms->resp_list_lock, flags);
+ return 0;
+ }
+
+ if (NULL != (t = vtpms->current_request)) {
+ transmission_free(t);
+ vtpms->current_request = NULL;
+ }
+
+ t = transmission_alloc();
+ if (t) {
+ if (!transmission_set_res_buffer(t, buffer, count)) {
+ transmission_free(t);
+ spin_unlock_irqrestore(&vtpms->resp_list_lock, flags);
+ return -ENOMEM;
+ }
+ ret_size = count;
+ vtpms->current_response = t;
+ wake_up_interruptible(&vtpms->resp_wait_queue);
+ }
+ spin_unlock_irqrestore(&vtpms->resp_list_lock, flags);
+
+ return ret_size;
+}
+
+
+/*
+ * Lower layer indicates its status (connected/disconnected)
+ */
+void vtpm_vd_status(u8 vd_status)
+{
+ vtpms->vd_status = vd_status;
+ if ((vtpms->vd_status & TPM_VD_STATUS_CONNECTED) == 0) {
+ vtpms->disconnect_time = jiffies;
+ }
+}
+
+/* =============================================================
+ * Interface with the generic TPM driver
+ * =============================================================
+ */
+static int vtpm_recv(struct tpm_chip *chip, u8 *buf, size_t count)
+{
+ int rc = 0;
+ unsigned long flags;
+
+ /*
+ * Check if the previous operation only queued the command
+ * In this case there won't be a response, so I just
+ * return from here and reset that flag. In any other
+ * case I should receive a response from the back-end.
+ */
+ spin_lock_irqsave(&vtpms->resp_list_lock, flags);
+ if ((vtpms->flags & DATAEX_FLAG_QUEUED_ONLY) != 0) {
+ vtpms->flags &= ~DATAEX_FLAG_QUEUED_ONLY;
+ spin_unlock_irqrestore(&vtpms->resp_list_lock, flags);
+ /*
+ * The first few commands (measurements) must be
+ * queued since it might not be possible to talk to the
+ * TPM, yet.
+ * Return a response of up to 30 '0's.
+ */
+
+ count = MIN(count, 30);
+ memset(buf, 0x0, count);
+ return count;
+ }
+ /*
+ * Check whether something is in the responselist and if
+ * there's nothing in the list wait for something to appear.
+ */
+
+ if (!vtpms->current_response) {
+ spin_unlock_irqrestore(&vtpms->resp_list_lock, flags);
+ interruptible_sleep_on_timeout(&vtpms->resp_wait_queue,
+ 1000);
+ spin_lock_irqsave(&vtpms->resp_list_lock ,flags);
+ }
+
+ if (vtpms->current_response) {
+ struct transmission *t = vtpms->current_response;
+ vtpms->current_response = NULL;
+ rc = MIN(count, t->response_len);
+ memcpy(buf, t->response, rc);
+ transmission_free(t);
+ }
+
+ spin_unlock_irqrestore(&vtpms->resp_list_lock, flags);
+ return rc;
+}
+
+static int vtpm_send(struct tpm_chip *chip, u8 *buf, size_t count)
+{
+ int rc = 0;
+ unsigned long flags;
+ struct transmission *t = transmission_alloc();
+
+ if (!t)
+ return -ENOMEM;
+ /*
+ * If there's a current request, it must be the
+ * previous request that has timed out.
+ */
+ spin_lock_irqsave(&vtpms->req_list_lock, flags);
+ if (vtpms->current_request != NULL) {
+ printk("WARNING: Sending although there is a request
outstanding.\n"
+ " Previous request must have timed out.\n");
+ transmission_free(vtpms->current_request);
+ vtpms->current_request = NULL;
+ }
+ spin_unlock_irqrestore(&vtpms->req_list_lock, flags);
+
+ /*
+ * Queue the packet if the driver below is not
+ * ready, yet, or there is any packet already
+ * in the queue.
+ * If the driver below is ready, unqueue all
+ * packets first before sending our current
+ * packet.
+ * For each unqueued packet, except for the
+ * last (=current) packet, call the function
+ * tpm_xen_recv to wait for the response to come
+ * back.
+ */
+ if ((vtpms->vd_status & TPM_VD_STATUS_CONNECTED) == 0) {
+ if (time_after(jiffies,
+ vtpms->disconnect_time + HZ * 10)) {
+ rc = -ENOENT;
+ } else {
+ goto queue_it;
+ }
+ } else {
+ /*
+ * Send all queued packets.
+ */
+ if (_vtpm_send_queued(chip) == 0) {
+
+ vtpms->current_request = t;
+
+ rc = vtpm_vd_send(chip,
+ vtpms->tpmvd->tpm_private,
+ buf,
+ count,
+ t);
+ /*
+ * The generic TPM driver will call
+ * the function to receive the response.
+ */
+ if (rc < 0) {
+ vtpms->current_request = NULL;
+ goto queue_it;
+ }
+ } else {
+queue_it:
+ if (!transmission_set_req_buffer(t, buf, count)) {
+ transmission_free(t);
+ rc = -ENOMEM;
+ goto exit;
+ }
+ /*
+ * An error occurred. Don't event try
+ * to send the current request. Just
+ * queue it.
+ */
+ spin_lock_irqsave(&vtpms->req_list_lock, flags);
+ vtpms->flags |= DATAEX_FLAG_QUEUED_ONLY;
+ list_add_tail(&t->next, &vtpms->queued_requests);
+ spin_unlock_irqrestore(&vtpms->req_list_lock, flags);
+ }
+ }
+
+exit:
+ return rc;
+}
+
+
+/*
+ * Send all queued requests.
+ */
+static int _vtpm_send_queued(struct tpm_chip *chip)
+{
+ int rc;
+ int error = 0;
+ long flags;
+ unsigned char buffer[1];
+
+ spin_lock_irqsave(&vtpms->req_list_lock, flags);
+
+ while (!list_empty(&vtpms->queued_requests)) {
+ /*
+ * Need to dequeue them.
+ * Read the result into a dummy buffer.
+ */
+ struct transmission *qt = (struct transmission *)
+ vtpms->queued_requests.next;
+ list_del(&qt->next);
+ vtpms->current_request = qt;
+ spin_unlock_irqrestore(&vtpms->req_list_lock, flags);
+
+ rc = vtpm_vd_send(chip,
+ vtpms->tpmvd->tpm_private,
+ qt->request,
+ qt->request_len,
+ qt);
+
+ if (rc < 0) {
+ spin_lock_irqsave(&vtpms->req_list_lock, flags);
+ if ((qt = vtpms->current_request) != NULL) {
+ /*
+ * requeue it at the beginning
+ * of the list
+ */
+ list_add(&qt->next,
+ &vtpms->queued_requests);
+ }
+ vtpms->current_request = NULL;
+ error = 1;
+ break;
+ }
+ /*
+ * After this point qt is not valid anymore!
+ * It is freed when the front-end is delivering
+ * the data by calling tpm_recv
+ */
+ /*
+ * Receive response into provided dummy buffer
+ */
+ rc = vtpm_recv(chip, buffer, sizeof(buffer));
+ spin_lock_irqsave(&vtpms->req_list_lock, flags);
+ }
+
+ spin_unlock_irqrestore(&vtpms->req_list_lock, flags);
+
+ return error;
+}
+
+static void vtpm_cancel(struct tpm_chip *chip)
+{
+ unsigned long flags;
+ spin_lock_irqsave(&vtpms->resp_list_lock,flags);
+
+ vtpms->req_cancelled = vtpms->current_request;
+
+ spin_unlock_irqrestore(&vtpms->resp_list_lock,flags);
+}
+
+static u8 vtpm_status(struct tpm_chip *chip)
+{
+ u8 rc = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&vtpms->resp_list_lock, flags);
+ /*
+ * Data are available if:
+ * - there's a current response
+ * - the last packet was queued only (this is fake, but necessary to
+ * get the generic TPM layer to call the receive function.)
+ */
+ if (vtpms->current_response ||
+ 0 != (vtpms->flags & DATAEX_FLAG_QUEUED_ONLY)) {
+ rc = STATUS_DATA_AVAIL;
+ }
+ spin_unlock_irqrestore(&vtpms->resp_list_lock, flags);
+ return rc;
+}
+
+static struct file_operations vtpm_ops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .open = tpm_open,
+ .read = tpm_read,
+ .write = tpm_write,
+ .release = tpm_release,
+};
+
+static DEVICE_ATTR(pubek, S_IRUGO, tpm_show_pubek, NULL);
+static DEVICE_ATTR(pcrs, S_IRUGO, tpm_show_pcrs, NULL);
+static DEVICE_ATTR(caps, S_IRUGO, tpm_show_caps, NULL);
+static DEVICE_ATTR(cancel, S_IWUSR |S_IWGRP, NULL, tpm_store_cancel);
+
+static struct attribute *vtpm_attrs[] = {
+ &dev_attr_pubek.attr,
+ &dev_attr_pcrs.attr,
+ &dev_attr_caps.attr,
+ &dev_attr_cancel.attr,
+ NULL,
+};
+
+static struct attribute_group vtpm_attr_grp = { .attrs = vtpm_attrs };
+
+static struct tpm_vendor_specific tpm_vtpm = {
+ .recv = vtpm_recv,
+ .send = vtpm_send,
+ .cancel = vtpm_cancel,
+ .status = vtpm_status,
+ .req_complete_mask = STATUS_BUSY | STATUS_DATA_AVAIL,
+ .req_complete_val = STATUS_DATA_AVAIL,
+ .req_canceled = STATUS_READY,
+ .base = 0,
+ .attr_group = &vtpm_attr_grp,
+ .miscdev = {
+ .fops = &vtpm_ops,
+ },
+};
+
+static struct platform_device *pdev;
+
+int __init init_vtpm(struct tpm_virtual_device *tvd)
+{
+ int rc;
+
+ /* vtpms is global - only allow one user */
+ if (vtpms)
+ return -EBUSY;
+
+ vtpms = kzalloc(sizeof(struct vtpm_state), GFP_KERNEL);
+ if (!vtpms)
+ return -ENOMEM;
+
+ vtpm_state_init(vtpms);
+ vtpms->tpmvd = tvd;
+
+ pdev = platform_device_register_simple("tpm_vtpm", -1, NULL, 0);
+ if (IS_ERR(pdev)) {
+ rc = PTR_ERR(pdev);
+ goto err_free_mem;
+ }
+
+ if (tvd)
+ tpm_vtpm.buffersize = tvd->max_tx_size;
+
+ if ((rc = tpm_register_hardware(&pdev->dev, &tpm_vtpm)) < 0) {
+ goto err_unreg_pdev;
+ }
+
+ return 0;
+
+err_unreg_pdev:
+ platform_device_unregister(pdev);
+err_free_mem:
+ kfree(vtpms);
+ vtpms = NULL;
+
+ return rc;
+}
+
+void __exit cleanup_vtpm(void)
+{
+ struct tpm_chip *chip = dev_get_drvdata(&pdev->dev);
+ if (chip) {
+ tpm_remove_hardware(chip->dev);
+ platform_device_unregister(pdev);
+ }
+ kfree(vtpms);
+ vtpms = NULL;
+}
diff -r 55f73916d319 -r 51484df99be1
linux-2.6-xen-sparse/drivers/char/tpm/tpm_vtpm.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/linux-2.6-xen-sparse/drivers/char/tpm/tpm_vtpm.h Thu May 04 14:19:19
2006 +0100
@@ -0,0 +1,38 @@
+#ifndef TPM_VTPM_H
+#define TPM_VTPM_H
+
+struct tpm_chip;
+struct tpm_private;
+
+struct tpm_virtual_device {
+ /*
+ * This field indicates the maximum size the driver can
+ * transfer in one chunk. It is filled in by the front-end
+ * driver and should be propagated to the generic tpm driver
+ * for allocation of buffers.
+ */
+ unsigned int max_tx_size;
+ /*
+ * The following is a private structure of the underlying
+ * driver. It is passed as parameter in the send function.
+ */
+ struct tpm_private *tpm_private;
+};
+
+enum vdev_status {
+ TPM_VD_STATUS_DISCONNECTED = 0x0,
+ TPM_VD_STATUS_CONNECTED = 0x1
+};
+
+/* this function is called from tpm_vtpm.c */
+int vtpm_vd_send(struct tpm_chip *tc,
+ struct tpm_private * tp,
+ const u8 * buf, size_t count, void *ptr);
+
+/* these functions are offered by tpm_vtpm.c */
+int __init init_vtpm(struct tpm_virtual_device *);
+void __exit cleanup_vtpm(void);
+int vtpm_vd_recv(const unsigned char *buffer, size_t count, const void *ptr);
+void vtpm_vd_status(u8 status);
+
+#endif
diff -r 55f73916d319 -r 51484df99be1
linux-2.6-xen-sparse/drivers/xen/tpmfront/Makefile
--- a/linux-2.6-xen-sparse/drivers/xen/tpmfront/Makefile Tue May 02
18:17:59 2006 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,2 +0,0 @@
-
-obj-$(CONFIG_XEN_TPMDEV_FRONTEND) += tpmfront.o
diff -r 55f73916d319 -r 51484df99be1
linux-2.6-xen-sparse/drivers/xen/tpmfront/tpmfront.c
--- a/linux-2.6-xen-sparse/drivers/xen/tpmfront/tpmfront.c Tue May 02
18:17:59 2006 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,767 +0,0 @@
-/*
- * Copyright (c) 2005, IBM Corporation
- *
- * Author: Stefan Berger, stefanb@xxxxxxxxxx
- * Grant table support: Mahadevan Gomathisankaran
- *
- * This code has been derived from drivers/xen/netfront/netfront.c
- *
- * Copyright (c) 2002-2004, K A Fraser
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation; or, when distributed
- * separately from the Linux kernel or incorporated into other
- * software packages, subject to the following license:
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this source file (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use, copy, modify,
- * merge, publish, distribute, sublicense, and/or sell copies of the Software,
- * and to permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
- */
-
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/version.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/errno.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <xen/tpmfe.h>
-#include <linux/err.h>
-#include <linux/mutex.h>
-#include <asm/io.h>
-#include <xen/evtchn.h>
-#include <xen/interface/grant_table.h>
-#include <xen/interface/io/tpmif.h>
-#include <asm/uaccess.h>
-#include <xen/xenbus.h>
-#include <xen/interface/grant_table.h>
-
-#include "tpmfront.h"
-
-#undef DEBUG
-
-/* locally visible variables */
-static grant_ref_t gref_head;
-static struct tpm_private *my_priv;
-
-/* local function prototypes */
-static irqreturn_t tpmif_int(int irq,
- void *tpm_priv,
- struct pt_regs *ptregs);
-static void tpmif_rx_action(unsigned long unused);
-static int tpmif_connect(struct xenbus_device *dev,
- struct tpm_private *tp,
- domid_t domid);
-static DECLARE_TASKLET(tpmif_rx_tasklet, tpmif_rx_action, 0);
-static int tpmif_allocate_tx_buffers(struct tpm_private *tp);
-static void tpmif_free_tx_buffers(struct tpm_private *tp);
-static void tpmif_set_connected_state(struct tpm_private *tp,
- u8 newstate);
-static int tpm_xmit(struct tpm_private *tp,
- const u8 * buf, size_t count, int userbuffer,
- void *remember);
-static void destroy_tpmring(struct tpm_private *tp);
-
-#define DPRINTK(fmt, args...) \
- pr_debug("xen_tpm_fr (%s:%d) " fmt, __FUNCTION__, __LINE__, ##args)
-#define IPRINTK(fmt, args...) \
- printk(KERN_INFO "xen_tpm_fr: " fmt, ##args)
-#define WPRINTK(fmt, args...) \
- printk(KERN_WARNING "xen_tpm_fr: " fmt, ##args)
-
-#define GRANT_INVALID_REF 0
-
-
-static inline int
-tx_buffer_copy(struct tx_buffer *txb, const u8 * src, int len,
- int isuserbuffer)
-{
- int copied = len;
-
- if (len > txb->size) {
- copied = txb->size;
- }
- if (isuserbuffer) {
- if (copy_from_user(txb->data, src, copied))
- return -EFAULT;
- } else {
- memcpy(txb->data, src, copied);
- }
- txb->len = len;
- return copied;
-}
-
-static inline struct tx_buffer *tx_buffer_alloc(void)
-{
- struct tx_buffer *txb = kzalloc(sizeof (struct tx_buffer),
- GFP_KERNEL);
-
- if (txb) {
- txb->len = 0;
- txb->size = PAGE_SIZE;
- txb->data = (unsigned char *)__get_free_page(GFP_KERNEL);
- if (txb->data == NULL) {
- kfree(txb);
- txb = NULL;
- }
- }
- return txb;
-}
-
-
-static inline void tx_buffer_free(struct tx_buffer *txb)
-{
- if (txb) {
- free_page((long)txb->data);
- kfree(txb);
- }
-}
-
-/**************************************************************
- Utility function for the tpm_private structure
-**************************************************************/
-static inline void tpm_private_init(struct tpm_private *tp)
-{
- spin_lock_init(&tp->tx_lock);
- init_waitqueue_head(&tp->wait_q);
-}
-
-static inline void tpm_private_free(void)
-{
- tpmif_free_tx_buffers(my_priv);
- kfree(my_priv);
- my_priv = NULL;
-}
-
-static struct tpm_private *tpm_private_get(void)
-{
- int err;
- if (!my_priv) {
- my_priv = kzalloc(sizeof(struct tpm_private), GFP_KERNEL);
- if (my_priv) {
- tpm_private_init(my_priv);
- err = tpmif_allocate_tx_buffers(my_priv);
- if (err < 0) {
- tpm_private_free();
- }
- }
- }
- return my_priv;
-}
-
-/**************************************************************
-
- The interface to let the tpm plugin register its callback
- function and send data to another partition using this module
-
-**************************************************************/
-
-static DEFINE_MUTEX(upperlayer_lock);
-static DEFINE_MUTEX(suspend_lock);
-static struct tpmfe_device *upperlayer_tpmfe;
-
-/*
- * Send data via this module by calling this function
- */
-int tpm_fe_send(struct tpm_private *tp, const u8 * buf, size_t count, void
*ptr)
-{
- int sent;
-
- mutex_lock(&suspend_lock);
- sent = tpm_xmit(tp, buf, count, 0, ptr);
- mutex_unlock(&suspend_lock);
-
- return sent;
-}
-EXPORT_SYMBOL(tpm_fe_send);
-
-/*
- * Register a callback for receiving data from this module
- */
-int tpm_fe_register_receiver(struct tpmfe_device *tpmfe_dev)
-{
- int rc = 0;
-
- mutex_lock(&upperlayer_lock);
- if (NULL == upperlayer_tpmfe) {
- upperlayer_tpmfe = tpmfe_dev;
- tpmfe_dev->max_tx_size = TPMIF_TX_RING_SIZE * PAGE_SIZE;
- tpmfe_dev->tpm_private = tpm_private_get();
- if (!tpmfe_dev->tpm_private) {
- rc = -ENOMEM;
- }
- } else {
- rc = -EBUSY;
- }
- mutex_unlock(&upperlayer_lock);
- return rc;
-}
-EXPORT_SYMBOL(tpm_fe_register_receiver);
-
-/*
- * Unregister the callback for receiving data from this module
- */
-void tpm_fe_unregister_receiver(void)
-{
- mutex_lock(&upperlayer_lock);
- upperlayer_tpmfe = NULL;
- mutex_unlock(&upperlayer_lock);
-}
-EXPORT_SYMBOL(tpm_fe_unregister_receiver);
-
-/*
- * Call this function to send data to the upper layer's
- * registered receiver function.
- */
-static int tpm_fe_send_upperlayer(const u8 * buf, size_t count,
- const void *ptr)
-{
- int rc = 0;
-
- mutex_lock(&upperlayer_lock);
-
- if (upperlayer_tpmfe && upperlayer_tpmfe->receive)
- rc = upperlayer_tpmfe->receive(buf, count, ptr);
-
- mutex_unlock(&upperlayer_lock);
- return rc;
-}
-
-/**************************************************************
- XENBUS support code
-**************************************************************/
-
-static int setup_tpmring(struct xenbus_device *dev,
- struct tpm_private *tp)
-{
- tpmif_tx_interface_t *sring;
- int err;
-
- tp->ring_ref = GRANT_INVALID_REF;
-
- sring = (void *)__get_free_page(GFP_KERNEL);
- if (!sring) {
- xenbus_dev_fatal(dev, -ENOMEM, "allocating shared ring");
- return -ENOMEM;
- }
- tp->tx = sring;
-
- err = xenbus_grant_ring(dev, virt_to_mfn(tp->tx));
- if (err < 0) {
- free_page((unsigned long)sring);
- tp->tx = NULL;
- xenbus_dev_fatal(dev, err, "allocating grant reference");
- goto fail;
- }
- tp->ring_ref = err;
-
- err = tpmif_connect(dev, tp, dev->otherend_id);
- if (err)
- goto fail;
-
- return 0;
-fail:
- destroy_tpmring(tp);
- return err;
-}
-
-
-static void destroy_tpmring(struct tpm_private *tp)
-{
- tpmif_set_connected_state(tp, 0);
-
- if (tp->ring_ref != GRANT_INVALID_REF) {
- gnttab_end_foreign_access(tp->ring_ref, 0,
- (unsigned long)tp->tx);
- tp->ring_ref = GRANT_INVALID_REF;
- tp->tx = NULL;
- }
-
- if (tp->irq)
- unbind_from_irqhandler(tp->irq, tp);
-
- tp->evtchn = tp->irq = 0;
-}
-
-
-static int talk_to_backend(struct xenbus_device *dev,
- struct tpm_private *tp)
-{
- const char *message = NULL;
- int err;
- xenbus_transaction_t xbt;
-
- err = setup_tpmring(dev, tp);
- if (err) {
- xenbus_dev_fatal(dev, err, "setting up ring");
- goto out;
- }
-
-again:
- err = xenbus_transaction_start(&xbt);
- if (err) {
- xenbus_dev_fatal(dev, err, "starting transaction");
- goto destroy_tpmring;
- }
-
- err = xenbus_printf(xbt, dev->nodename,
- "ring-ref","%u", tp->ring_ref);
- if (err) {
- message = "writing ring-ref";
- goto abort_transaction;
- }
-
- err = xenbus_printf(xbt, dev->nodename,
- "event-channel", "%u", tp->evtchn);
- if (err) {
- message = "writing event-channel";
- goto abort_transaction;
- }
-
- err = xenbus_transaction_end(xbt, 0);
- if (err == -EAGAIN)
- goto again;
- if (err) {
- xenbus_dev_fatal(dev, err, "completing transaction");
- goto destroy_tpmring;
- }
-
- xenbus_switch_state(dev, XenbusStateConnected);
-
- return 0;
-
-abort_transaction:
- xenbus_transaction_end(xbt, 1);
- if (message)
- xenbus_dev_error(dev, err, "%s", message);
-destroy_tpmring:
- destroy_tpmring(tp);
-out:
- return err;
-}
-
-/**
- * Callback received when the backend's state changes.
- */
-static void backend_changed(struct xenbus_device *dev,
- XenbusState backend_state)
-{
- struct tpm_private *tp = dev->data;
- DPRINTK("\n");
-
- switch (backend_state) {
- case XenbusStateInitialising:
- case XenbusStateInitWait:
- case XenbusStateInitialised:
- case XenbusStateUnknown:
- break;
-
- case XenbusStateConnected:
- tpmif_set_connected_state(tp, 1);
- break;
-
- case XenbusStateClosing:
- tpmif_set_connected_state(tp, 0);
- break;
-
- case XenbusStateClosed:
- if (tp->is_suspended == 0) {
- device_unregister(&dev->dev);
- }
- xenbus_switch_state(dev, XenbusStateClosed);
- break;
- }
-}
-
-
-static int tpmfront_probe(struct xenbus_device *dev,
- const struct xenbus_device_id *id)
-{
- int err;
- int handle;
- struct tpm_private *tp = tpm_private_get();
-
- if (!tp)
- return -ENOMEM;
-
- err = xenbus_scanf(XBT_NULL, dev->nodename,
- "handle", "%i", &handle);
- if (XENBUS_EXIST_ERR(err))
- return err;
-
- if (err < 0) {
- xenbus_dev_fatal(dev,err,"reading virtual-device");
- return err;
- }
-
- tp->dev = dev;
- dev->data = tp;
-
- err = talk_to_backend(dev, tp);
- if (err) {
- tpm_private_free();
- dev->data = NULL;
- return err;
- }
- return 0;
-}
-
-
-static int tpmfront_remove(struct xenbus_device *dev)
-{
- struct tpm_private *tp = (struct tpm_private *)dev->data;
- destroy_tpmring(tp);
- return 0;
-}
-
-static int tpmfront_suspend(struct xenbus_device *dev)
-{
- struct tpm_private *tp = (struct tpm_private *)dev->data;
- u32 ctr;
-
- /* lock, so no app can send */
- mutex_lock(&suspend_lock);
- xenbus_switch_state(dev, XenbusStateClosed);
- tp->is_suspended = 1;
-
- for (ctr = 0; atomic_read(&tp->tx_busy) && ctr <= 25; ctr++) {
- if ((ctr % 10) == 0)
- printk("TPM-FE [INFO]: Waiting for outstanding
request.\n");
- /*
- * Wait for a request to be responded to.
- */
- interruptible_sleep_on_timeout(&tp->wait_q, 100);
- }
-
- if (atomic_read(&tp->tx_busy)) {
- /*
- * A temporary work-around.
- */
- printk("TPM-FE [WARNING]: Resetting busy flag.");
- atomic_set(&tp->tx_busy, 0);
- }
-
- return 0;
-}
-
-static int tpmfront_resume(struct xenbus_device *dev)
-{
- struct tpm_private *tp = (struct tpm_private *)dev->data;
- destroy_tpmring(tp);
- return talk_to_backend(dev, tp);
-}
-
-static int tpmif_connect(struct xenbus_device *dev,
- struct tpm_private *tp,
- domid_t domid)
-{
- int err;
-
- tp->backend_id = domid;
-
- err = xenbus_alloc_evtchn(dev, &tp->evtchn);
- if (err)
- return err;
-
- err = bind_evtchn_to_irqhandler(tp->evtchn,
- tpmif_int, SA_SAMPLE_RANDOM, "tpmif",
- tp);
- if (err <= 0) {
- WPRINTK("bind_evtchn_to_irqhandler failed (err=%d)\n", err);
- return err;
- }
-
- tp->irq = err;
- return 0;
-}
-
-static struct xenbus_device_id tpmfront_ids[] = {
- { "vtpm" },
- { "" }
-};
-
-static struct xenbus_driver tpmfront = {
- .name = "vtpm",
- .owner = THIS_MODULE,
- .ids = tpmfront_ids,
- .probe = tpmfront_probe,
- .remove = tpmfront_remove,
- .resume = tpmfront_resume,
- .otherend_changed = backend_changed,
- .suspend = tpmfront_suspend,
-};
-
-static void __init init_tpm_xenbus(void)
-{
- xenbus_register_frontend(&tpmfront);
-}
-
-static void __exit exit_tpm_xenbus(void)
-{
- xenbus_unregister_driver(&tpmfront);
-}
-
-static int tpmif_allocate_tx_buffers(struct tpm_private *tp)
-{
- unsigned int i;
-
- for (i = 0; i < TPMIF_TX_RING_SIZE; i++) {
- tp->tx_buffers[i] = tx_buffer_alloc();
- if (!tp->tx_buffers[i]) {
- tpmif_free_tx_buffers(tp);
- return -ENOMEM;
- }
- }
- return 0;
-}
-
-static void tpmif_free_tx_buffers(struct tpm_private *tp)
-{
- unsigned int i;
-
- for (i = 0; i < TPMIF_TX_RING_SIZE; i++) {
- tx_buffer_free(tp->tx_buffers[i]);
- }
-}
-
-static void tpmif_rx_action(unsigned long priv)
-{
- struct tpm_private *tp = (struct tpm_private *)priv;
-
- int i = 0;
- unsigned int received;
- unsigned int offset = 0;
- u8 *buffer;
- tpmif_tx_request_t *tx;
- tx = &tp->tx->ring[i].req;
-
- received = tx->size;
-
- buffer = kmalloc(received, GFP_KERNEL);
- if (NULL == buffer) {
- goto exit;
- }
-
- for (i = 0; i < TPMIF_TX_RING_SIZE && offset < received; i++) {
- struct tx_buffer *txb = tp->tx_buffers[i];
- tpmif_tx_request_t *tx;
- unsigned int tocopy;
-
- tx = &tp->tx->ring[i].req;
- tocopy = tx->size;
- if (tocopy > PAGE_SIZE) {
- tocopy = PAGE_SIZE;
- }
-
- memcpy(&buffer[offset], txb->data, tocopy);
-
- gnttab_release_grant_reference(&gref_head, tx->ref);
-
- offset += tocopy;
- }
-
- tpm_fe_send_upperlayer(buffer, received, tp->tx_remember);
- kfree(buffer);
-
-exit:
- atomic_set(&tp->tx_busy, 0);
- wake_up_interruptible(&tp->wait_q);
-}
-
-
-static irqreturn_t tpmif_int(int irq, void *tpm_priv, struct pt_regs *ptregs)
-{
- struct tpm_private *tp = tpm_priv;
- unsigned long flags;
-
- spin_lock_irqsave(&tp->tx_lock, flags);
- tpmif_rx_tasklet.data = (unsigned long)tp;
- tasklet_schedule(&tpmif_rx_tasklet);
- spin_unlock_irqrestore(&tp->tx_lock, flags);
-
- return IRQ_HANDLED;
-}
-
-
-static int tpm_xmit(struct tpm_private *tp,
- const u8 * buf, size_t count, int isuserbuffer,
- void *remember)
-{
- tpmif_tx_request_t *tx;
- TPMIF_RING_IDX i;
- unsigned int offset = 0;
-
- spin_lock_irq(&tp->tx_lock);
-
- if (unlikely(atomic_read(&tp->tx_busy))) {
- printk("tpm_xmit: There's an outstanding request/response "
- "on the way!\n");
- spin_unlock_irq(&tp->tx_lock);
- return -EBUSY;
- }
-
- if (tp->is_connected != 1) {
- spin_unlock_irq(&tp->tx_lock);
- return -EIO;
- }
-
- for (i = 0; count > 0 && i < TPMIF_TX_RING_SIZE; i++) {
- struct tx_buffer *txb = tp->tx_buffers[i];
- int copied;
-
- if (NULL == txb) {
- DPRINTK("txb (i=%d) is NULL. buffers initilized?\n"
- "Not transmitting anything!\n", i);
- spin_unlock_irq(&tp->tx_lock);
- return -EFAULT;
- }
- copied = tx_buffer_copy(txb, &buf[offset], count,
- isuserbuffer);
- if (copied < 0) {
- /* An error occurred */
- spin_unlock_irq(&tp->tx_lock);
- return copied;
- }
- count -= copied;
- offset += copied;
-
- tx = &tp->tx->ring[i].req;
-
- tx->addr = virt_to_machine(txb->data);
- tx->size = txb->len;
-
- DPRINTK("First 4 characters sent by TPM-FE are 0x%02x 0x%02x
0x%02x 0x%02x\n",
- txb->data[0],txb->data[1],txb->data[2],txb->data[3]);
-
- /* get the granttable reference for this page */
- tx->ref = gnttab_claim_grant_reference(&gref_head);
-
- if (-ENOSPC == tx->ref) {
- spin_unlock_irq(&tp->tx_lock);
- DPRINTK(" Grant table claim reference failed in func:%s
line:%d file:%s\n", __FUNCTION__, __LINE__, __FILE__);
- return -ENOSPC;
- }
- gnttab_grant_foreign_access_ref( tx->ref,
- tp->backend_id,
- (tx->addr >> PAGE_SHIFT),
- 0 /*RW*/);
- wmb();
- }
-
- atomic_set(&tp->tx_busy, 1);
- tp->tx_remember = remember;
- mb();
-
- DPRINTK("Notifying backend via event channel %d\n",
- tp->evtchn);
-
- notify_remote_via_irq(tp->irq);
-
- spin_unlock_irq(&tp->tx_lock);
- return offset;
-}
-
-
-static void tpmif_notify_upperlayer(struct tpm_private *tp)
-{
- /*
- * Notify upper layer about the state of the connection
- * to the BE.
- */
- mutex_lock(&upperlayer_lock);
-
- if (upperlayer_tpmfe != NULL) {
- if (tp->is_connected) {
- upperlayer_tpmfe->status(TPMFE_STATUS_CONNECTED);
- } else {
- upperlayer_tpmfe->status(0);
- }
- }
- mutex_unlock(&upperlayer_lock);
-}
-
-
-static void tpmif_set_connected_state(struct tpm_private *tp, u8 is_connected)
-{
- /*
- * Don't notify upper layer if we are in suspend mode and
- * should disconnect - assumption is that we will resume
- * The mutex keeps apps from sending.
- */
- if (is_connected == 0 && tp->is_suspended == 1) {
- return;
- }
-
- /*
- * Unlock the mutex if we are connected again
- * after being suspended - now resuming.
- * This also removes the suspend state.
- */
- if (is_connected == 1 && tp->is_suspended == 1) {
- tp->is_suspended = 0;
- /* unlock, so apps can resume sending */
- mutex_unlock(&suspend_lock);
- }
-
- if (is_connected != tp->is_connected) {
- tp->is_connected = is_connected;
- tpmif_notify_upperlayer(tp);
- }
-}
-
-
-/* =================================================================
- * Initialization function.
- * =================================================================
- */
-
-static int __init tpmif_init(void)
-{
- IPRINTK("Initialising the vTPM driver.\n");
- if ( gnttab_alloc_grant_references ( TPMIF_TX_RING_SIZE,
- &gref_head ) < 0) {
- return -EFAULT;
- }
-
- init_tpm_xenbus();
-
- return 0;
-}
-
-module_init(tpmif_init);
-
-static void __exit tpmif_exit(void)
-{
- exit_tpm_xenbus();
- gnttab_free_grant_references(gref_head);
-}
-
-module_exit(tpmif_exit);
-
-MODULE_LICENSE("Dual BSD/GPL");
-
-/*
- * Local variables:
- * c-file-style: "linux"
- * indent-tabs-mode: t
- * c-indent-level: 8
- * c-basic-offset: 8
- * tab-width: 8
- * End:
- */
diff -r 55f73916d319 -r 51484df99be1
linux-2.6-xen-sparse/drivers/xen/tpmfront/tpmfront.h
--- a/linux-2.6-xen-sparse/drivers/xen/tpmfront/tpmfront.h Tue May 02
18:17:59 2006 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,40 +0,0 @@
-#ifndef TPM_FRONT_H
-#define TPM_FRONT_H
-
-struct tpm_private {
- tpmif_tx_interface_t *tx;
- unsigned int evtchn;
- unsigned int irq;
- u8 is_connected;
- u8 is_suspended;
-
- spinlock_t tx_lock;
-
- struct tx_buffer *tx_buffers[TPMIF_TX_RING_SIZE];
-
- atomic_t tx_busy;
- void *tx_remember;
- domid_t backend_id;
- wait_queue_head_t wait_q;
-
- struct xenbus_device *dev;
- int ring_ref;
-};
-
-struct tx_buffer {
- unsigned int size; // available space in data
- unsigned int len; // used space in data
- unsigned char *data; // pointer to a page
-};
-
-#endif
-
-/*
- * Local variables:
- * c-file-style: "linux"
- * indent-tabs-mode: t
- * c-indent-level: 8
- * c-basic-offset: 8
- * tab-width: 8
- * End:
- */
diff -r 55f73916d319 -r 51484df99be1 linux-2.6-xen-sparse/include/xen/tpmfe.h
--- a/linux-2.6-xen-sparse/include/xen/tpmfe.h Tue May 02 18:17:59 2006 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,40 +0,0 @@
-#ifndef TPM_FE_H
-#define TPM_FE_H
-
-struct tpm_private;
-
-struct tpmfe_device {
- /*
- * Let upper layer receive data from front-end
- */
- int (*receive)(const u8 *buffer, size_t count, const void *ptr);
- /*
- * Indicate the status of the front-end to the upper
- * layer.
- */
- void (*status)(unsigned int flags);
-
- /*
- * This field indicates the maximum size the driver can
- * transfer in one chunk. It is filled out by the front-end
- * driver and should be propagated to the generic tpm driver
- * for allocation of buffers.
- */
- unsigned int max_tx_size;
- /*
- * The following is a private structure of the underlying
- * driver. It's expected as first parameter in the send function.
- */
- struct tpm_private *tpm_private;
-};
-
-enum {
- TPMFE_STATUS_DISCONNECTED = 0x0,
- TPMFE_STATUS_CONNECTED = 0x1
-};
-
-int tpm_fe_send(struct tpm_private * tp, const u8 * buf, size_t count, void
*ptr);
-int tpm_fe_register_receiver(struct tpmfe_device *);
-void tpm_fe_unregister_receiver(void);
-
-#endif
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