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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] Linux 2.6 cleanups.
# HG changeset patch
# User cl349@xxxxxxxxxxxxxxxxxxxx
# Node ID 6fa6c392d258d827a79a6d2a70f55af74d3545fa
# Parent 6d4c0bfc3c1c15d1871d17698bfd78a9ea05aff5
Linux 2.6 cleanups.
Signed-off-by: Christian Limpach <Christian.Limpach@xxxxxxxxxxxx>
diff -r 6d4c0bfc3c1c -r 6fa6c392d258 linux-2.6-xen-sparse/arch/xen/Makefile
--- a/linux-2.6-xen-sparse/arch/xen/Makefile Wed Aug 31 10:24:43 2005
+++ b/linux-2.6-xen-sparse/arch/xen/Makefile Thu Sep 1 08:25:22 2005
@@ -65,6 +65,7 @@
XINSTALL_NAME ?= $(KERNELRELEASE)
install: vmlinuz
+install kernel_install:
mkdir -p $(INSTALL_PATH)/boot
ln -f -s vmlinuz-$(XINSTALL_NAME)$(INSTALL_SUFFIX)
$(INSTALL_PATH)/boot/vmlinuz-$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(XENGUEST)$(INSTALL_SUFFIX)
rm -f $(INSTALL_PATH)/boot/vmlinuz-$(XINSTALL_NAME)$(INSTALL_SUFFIX)
diff -r 6d4c0bfc3c1c -r 6fa6c392d258 linux-2.6-xen-sparse/arch/xen/i386/Kconfig
--- a/linux-2.6-xen-sparse/arch/xen/i386/Kconfig Wed Aug 31 10:24:43 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/Kconfig Thu Sep 1 08:25:22 2005
@@ -379,18 +379,18 @@
If you don't know what to do here, say N.
config SMP_ALTERNATIVES
- bool "SMP alternatives support (EXPERIMENTAL)"
- depends on SMP && EXPERIMENTAL
- help
- Try to reduce the overhead of running an SMP kernel on a uniprocessor
- host slightly by replacing certain key instruction sequences
- according to whether we currently have more than one CPU available.
- This should provide a noticeable boost to performance when
- running SMP kernels on UP machines, and have negligible impact
- when running on an true SMP host.
+ bool "SMP alternatives support (EXPERIMENTAL)"
+ depends on SMP && EXPERIMENTAL
+ help
+ Try to reduce the overhead of running an SMP kernel on a uniprocessor
+ host slightly by replacing certain key instruction sequences
+ according to whether we currently have more than one CPU available.
+ This should provide a noticeable boost to performance when
+ running SMP kernels on UP machines, and have negligible impact
+ when running on an true SMP host.
If unsure, say N.
-
+
config NR_CPUS
int "Maximum number of CPUs (2-255)"
range 2 255
diff -r 6d4c0bfc3c1c -r 6fa6c392d258
linux-2.6-xen-sparse/arch/xen/i386/kernel/Makefile
--- a/linux-2.6-xen-sparse/arch/xen/i386/kernel/Makefile Wed Aug 31
10:24:43 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/kernel/Makefile Thu Sep 1
08:25:22 2005
@@ -5,6 +5,7 @@
XENARCH := $(subst ",,$(CONFIG_XENARCH))
CFLAGS += -Iarch/$(XENARCH)/kernel
+AFLAGS += -Iarch/$(XENARCH)/kernel
extra-y := head.o init_task.o
@@ -32,7 +33,7 @@
obj-$(CONFIG_X86_LOCAL_APIC) += apic.o
c-obj-$(CONFIG_X86_LOCAL_APIC) += nmi.o
obj-$(CONFIG_X86_IO_APIC) += io_apic.o
-c-obj-$(CONFIG_X86_REBOOTFIXUPS)+= reboot_fixups.o
+c-obj-$(CONFIG_X86_REBOOTFIXUPS) += reboot_fixups.o
c-obj-$(CONFIG_X86_NUMAQ) += numaq.o
c-obj-$(CONFIG_X86_SUMMIT_NUMA) += summit.o
c-obj-$(CONFIG_MODULES) += module.o
@@ -69,7 +70,7 @@
$(obj)/vsyscall-int80.so $(obj)/vsyscall-sysenter.so: \
$(obj)/vsyscall-%.so: $(src)/vsyscall.lds \
- $(obj)/vsyscall-%.o FORCE
+ $(obj)/vsyscall-%.o $(obj)/vsyscall-note.o FORCE
$(call if_changed,syscall)
# We also create a special relocatable object that should mirror the symbol
@@ -81,20 +82,17 @@
SYSCFLAGS_vsyscall-syms.o = -r
$(obj)/vsyscall-syms.o: $(src)/vsyscall.lds \
- $(obj)/vsyscall-sysenter.o FORCE
+ $(obj)/vsyscall-sysenter.o $(obj)/vsyscall-note.o FORCE
$(call if_changed,syscall)
c-link :=
-s-link := vsyscall-int80.o vsyscall-sysenter.o vsyscall-sigreturn.o
vsyscall.lds.o syscall_table.o
+s-link := vsyscall-int80.o vsyscall-sysenter.o vsyscall-sigreturn.o
vsyscall.lds.o vsyscall-note.o
$(patsubst %.o,$(obj)/%.c,$(c-obj-y) $(c-obj-m) $(c-link)) $(patsubst
%.o,$(obj)/%.S,$(s-obj-y) $(s-link)):
@ln -fsn $(srctree)/arch/i386/kernel/$(notdir $@) $@
$(obj)/vsyscall-int80.S: $(obj)/vsyscall-sigreturn.S
-EXTRA_AFLAGS += -I$(obj)
-$(obj)/entry.o: $(src)/entry.S $(src)/syscall_table.S
-
obj-y += $(c-obj-y) $(s-obj-y)
obj-m += $(c-obj-m)
diff -r 6d4c0bfc3c1c -r 6fa6c392d258
linux-2.6-xen-sparse/arch/xen/i386/kernel/entry.S
--- a/linux-2.6-xen-sparse/arch/xen/i386/kernel/entry.S Wed Aug 31 10:24:43 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/kernel/entry.S Thu Sep 1 08:25:22 2005
@@ -47,6 +47,7 @@
#include <asm/segment.h>
#include <asm/smp.h>
#include <asm/page.h>
+#include <asm/desc.h>
#include "irq_vectors.h"
#include <asm-xen/xen-public/xen.h>
@@ -112,7 +113,7 @@
XEN_BLOCK_EVENTS(%esi)
#else
#define preempt_stop
-#define resume_kernel restore_all
+#define resume_kernel restore_nocheck
#endif
#define SAVE_ALL \
@@ -161,11 +162,9 @@
addl $4, %esp; \
1: iret; \
.section .fixup,"ax"; \
-2: movl $(__USER_DS), %edx; \
- movl %edx, %ds; \
- movl %edx, %es; \
- movl $11,%eax; \
- call do_exit; \
+2: pushl $0; \
+ pushl $do_iret_error; \
+ jmp error_code; \
.previous; \
.section __ex_table,"a";\
.align 4; \
@@ -196,7 +195,7 @@
movl EFLAGS(%esp), %eax # mix EFLAGS and CS
movb CS(%esp), %al
testl $(VM_MASK | 2), %eax
- jz resume_kernel # returning to kernel or vm86-space
+ jz resume_kernel
ENTRY(resume_userspace)
XEN_BLOCK_EVENTS(%esi) # make sure we don't miss an interrupt
# setting need_resched or sigpending
@@ -211,7 +210,7 @@
ENTRY(resume_kernel)
XEN_BLOCK_EVENTS(%esi)
cmpl $0,TI_preempt_count(%ebp) # non-zero preempt_count ?
- jnz restore_all
+ jnz restore_nocheck
need_resched:
movl TI_flags(%ebp), %ecx # need_resched set ?
testb $_TIF_NEED_RESCHED, %cl
@@ -252,7 +251,8 @@
SAVE_ALL
GET_THREAD_INFO(%ebp)
- testb $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT),TI_flags(%ebp)
+ /* Note, _TIF_SECCOMP is bit number 8, and so it needs testw and not
testb */
+ testw
$(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),TI_flags(%ebp)
jnz syscall_trace_entry
cmpl $(nr_syscalls), %eax
jae syscall_badsys
@@ -276,7 +276,8 @@
SAVE_ALL
GET_THREAD_INFO(%ebp)
# system call tracing in operation
- testb $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT),TI_flags(%ebp)
+ /* Note, _TIF_SECCOMP is bit number 8, and so it needs testw and not
testb */
+ testw
$(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),TI_flags(%ebp)
jnz syscall_trace_entry
cmpl $(nr_syscalls), %eax
jae syscall_badsys
@@ -290,7 +291,20 @@
movl TI_flags(%ebp), %ecx
testw $_TIF_ALLWORK_MASK, %cx # current->work
jne syscall_exit_work
+
restore_all:
+#if 0 /* XEN */
+ movl EFLAGS(%esp), %eax # mix EFLAGS, SS and CS
+ # Warning: OLDSS(%esp) contains the wrong/random values if we
+ # are returning to the kernel.
+ # See comments in process.c:copy_thread() for details.
+ movb OLDSS(%esp), %ah
+ movb CS(%esp), %al
+ andl $(VM_MASK | (4 << 8) | 3), %eax
+ cmpl $((4 << 8) | 3), %eax
+ je ldt_ss # returning to user-space with LDT SS
+#endif /* XEN */
+restore_nocheck:
testl $VM_MASK, EFLAGS(%esp)
jnz resume_vm86
movb EVENT_MASK(%esp), %al
@@ -300,7 +314,19 @@
andb $1,%al # %al == mask & ~saved_mask
jnz restore_all_enable_events # != 0 => reenable event delivery
XEN_PUT_VCPU_INFO(%esi)
- RESTORE_ALL
+ RESTORE_REGS
+ addl $4, %esp
+1: iret
+.section .fixup,"ax"
+iret_exc:
+ pushl $0 # no error code
+ pushl $do_iret_error
+ jmp error_code
+.previous
+.section __ex_table,"a"
+ .align 4
+ .long 1b,iret_exc
+.previous
resume_vm86:
XEN_UNBLOCK_EVENTS(%esi)
@@ -309,6 +335,33 @@
movl $__HYPERVISOR_switch_vm86,%eax
int $0x82
ud2
+
+#if 0 /* XEN */
+ldt_ss:
+ larl OLDSS(%esp), %eax
+ jnz restore_nocheck
+ testl $0x00400000, %eax # returning to 32bit stack?
+ jnz restore_nocheck # allright, normal return
+ /* If returning to userspace with 16bit stack,
+ * try to fix the higher word of ESP, as the CPU
+ * won't restore it.
+ * This is an "official" bug of all the x86-compatible
+ * CPUs, which we can try to work around to make
+ * dosemu and wine happy. */
+ subl $8, %esp # reserve space for switch16 pointer
+ cli
+ movl %esp, %eax
+ /* Set up the 16bit stack frame with switch32 pointer on top,
+ * and a switch16 pointer on top of the current frame. */
+ call setup_x86_bogus_stack
+ RESTORE_REGS
+ lss 20+4(%esp), %esp # switch to 16bit stack
+1: iret
+.section __ex_table,"a"
+ .align 4
+ .long 1b,iret_exc
+.previous
+#endif /* XEN */
# perform work that needs to be done immediately before resumption
ALIGN
@@ -385,6 +438,27 @@
jmp resume_userspace
#if 0 /* XEN */
+#define FIXUP_ESPFIX_STACK \
+ movl %esp, %eax; \
+ /* switch to 32bit stack using the pointer on top of 16bit stack */ \
+ lss %ss:CPU_16BIT_STACK_SIZE-8, %esp; \
+ /* copy data from 16bit stack to 32bit stack */ \
+ call fixup_x86_bogus_stack; \
+ /* put ESP to the proper location */ \
+ movl %eax, %esp;
+#define UNWIND_ESPFIX_STACK \
+ pushl %eax; \
+ movl %ss, %eax; \
+ /* see if on 16bit stack */ \
+ cmpw $__ESPFIX_SS, %ax; \
+ jne 28f; \
+ movl $__KERNEL_DS, %edx; \
+ movl %edx, %ds; \
+ movl %edx, %es; \
+ /* switch to 32bit stack */ \
+ FIXUP_ESPFIX_STACK \
+28: popl %eax;
+
/*
* Build the entry stubs and pointer table with
* some assembler magic.
@@ -440,7 +514,9 @@
pushl %ecx
pushl %ebx
cld
- movl %es, %ecx
+ pushl %es
+# UNWIND_ESPFIX_STACK
+ popl %ecx
movl ES(%esp), %edi # get the function address
movl ORIG_EAX(%esp), %edx # get the error code
movl %eax, ORIG_EAX(%esp)
@@ -625,6 +701,11 @@
* fault happened on the sysenter path.
*/
ENTRY(nmi)
+ pushl %eax
+ movl %ss, %eax
+ cmpw $__ESPFIX_SS, %ax
+ popl %eax
+ je nmi_16bit_stack
cmpl $sysenter_entry,(%esp)
je nmi_stack_fixup
pushl %eax
@@ -644,7 +725,7 @@
xorl %edx,%edx # zero error code
movl %esp,%eax # pt_regs pointer
call do_nmi
- RESTORE_ALL
+ jmp restore_all
nmi_stack_fixup:
FIX_STACK(12,nmi_stack_correct, 1)
@@ -659,6 +740,29 @@
nmi_debug_stack_fixup:
FIX_STACK(24,nmi_stack_correct, 1)
jmp nmi_stack_correct
+
+nmi_16bit_stack:
+ /* create the pointer to lss back */
+ pushl %ss
+ pushl %esp
+ movzwl %sp, %esp
+ addw $4, (%esp)
+ /* copy the iret frame of 12 bytes */
+ .rept 3
+ pushl 16(%esp)
+ .endr
+ pushl %eax
+ SAVE_ALL
+ FIXUP_ESPFIX_STACK # %eax == %esp
+ xorl %edx,%edx # zero error code
+ call do_nmi
+ RESTORE_REGS
+ lss 12+4(%esp), %esp # back to 16bit stack
+1: iret
+.section __ex_table,"a"
+ .align 4
+ .long 1b,iret_exc
+.previous
#endif /* XEN */
ENTRY(int3)
@@ -725,7 +829,9 @@
pushl %ecx
pushl %ebx
cld
- movl %es,%edi
+ pushl %es
+# UNWIND_ESPFIX_STACK
+ popl %edi
movl ES(%esp), %ecx /* get the faulting address */
movl ORIG_EAX(%esp), %edx /* get the error code */
movl %eax, ORIG_EAX(%esp)
diff -r 6d4c0bfc3c1c -r 6fa6c392d258
linux-2.6-xen-sparse/arch/xen/i386/kernel/head.S
--- a/linux-2.6-xen-sparse/arch/xen/i386/kernel/head.S Wed Aug 31 10:24:43 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/kernel/head.S Thu Sep 1 08:25:22 2005
@@ -179,7 +179,7 @@
.quad 0x0000000000000000 /* 0xc0 APM CS 16 code (16 bit) */
.quad 0x0000000000000000 /* 0xc8 APM DS data */
- .quad 0x0000000000000000 /* 0xd0 - unused */
+ .quad 0x0000000000000000 /* 0xd0 - ESPFIX 16-bit SS */
.quad 0x0000000000000000 /* 0xd8 - unused */
.quad 0x0000000000000000 /* 0xe0 - unused */
.quad 0x0000000000000000 /* 0xe8 - unused */
diff -r 6d4c0bfc3c1c -r 6fa6c392d258
linux-2.6-xen-sparse/arch/xen/i386/kernel/irq.c
--- a/linux-2.6-xen-sparse/arch/xen/i386/kernel/irq.c Wed Aug 31 10:24:43 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/kernel/irq.c Thu Sep 1 08:25:22 2005
@@ -242,12 +242,12 @@
} else if (i == NR_IRQS) {
seq_printf(p, "NMI: ");
for_each_cpu(j)
- seq_printf(p, "%10u ", nmi_count(j));
+ seq_printf(p, "%10u ", nmi_count(j));
seq_putc(p, '\n');
#ifdef CONFIG_X86_LOCAL_APIC
seq_printf(p, "LOC: ");
for_each_cpu(j)
- seq_printf(p, "%10u ", per_cpu(irq_stat,
j).apic_timer_irqs);
+ seq_printf(p, "%10u ",
per_cpu(irq_stat,j).apic_timer_irqs);
seq_putc(p, '\n');
#endif
seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
@@ -263,6 +263,7 @@
void fixup_irqs(cpumask_t map)
{
unsigned int irq;
+ static int warned;
for (irq = 0; irq < NR_IRQS; irq++) {
cpumask_t mask;
@@ -276,7 +277,7 @@
}
if (irq_desc[irq].handler->set_affinity)
irq_desc[irq].handler->set_affinity(irq, mask);
- else if (irq_desc[irq].action)
+ else if (irq_desc[irq].action && !(warned++))
printk("Cannot set affinity for irq %i\n", irq);
}
diff -r 6d4c0bfc3c1c -r 6fa6c392d258
linux-2.6-xen-sparse/arch/xen/i386/kernel/process.c
--- a/linux-2.6-xen-sparse/arch/xen/i386/kernel/process.c Wed Aug 31
10:24:43 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/kernel/process.c Thu Sep 1
08:25:22 2005
@@ -467,7 +467,6 @@
return 1;
}
-
/*
* switch_to(x,yn) should switch tasks from x to y.
*
diff -r 6d4c0bfc3c1c -r 6fa6c392d258
linux-2.6-xen-sparse/arch/xen/i386/kernel/setup.c
--- a/linux-2.6-xen-sparse/arch/xen/i386/kernel/setup.c Wed Aug 31 10:24:43 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/kernel/setup.c Thu Sep 1 08:25:22 2005
@@ -1078,12 +1078,12 @@
void __init setup_bootmem_allocator(void);
static unsigned long __init setup_memory(void)
{
-
/*
* partially used pages are not usable - thus
* we are rounding upwards:
*/
- min_low_pfn = PFN_UP(__pa(xen_start_info.pt_base)) +
xen_start_info.nr_pt_frames;
+ min_low_pfn = PFN_UP(__pa(xen_start_info.pt_base)) +
+ xen_start_info.nr_pt_frames;
find_max_pfn();
diff -r 6d4c0bfc3c1c -r 6fa6c392d258
linux-2.6-xen-sparse/arch/xen/i386/kernel/smpboot.c
--- a/linux-2.6-xen-sparse/arch/xen/i386/kernel/smpboot.c Wed Aug 31
10:24:43 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/kernel/smpboot.c Thu Sep 1
08:25:22 2005
@@ -856,9 +856,6 @@
cpu_gdt_descr[cpu].address = __get_free_page(GFP_KERNEL|__GFP_ZERO);
BUG_ON(cpu_gdt_descr[0].size > PAGE_SIZE);
cpu_gdt_descr[cpu].size = cpu_gdt_descr[0].size;
- printk("GDT: copying %d bytes from %lx to %lx\n",
- cpu_gdt_descr[0].size, cpu_gdt_descr[0].address,
- cpu_gdt_descr[cpu].address);
memcpy((void *)cpu_gdt_descr[cpu].address,
(void *)cpu_gdt_descr[0].address, cpu_gdt_descr[0].size);
@@ -1274,6 +1271,7 @@
printk(KERN_WARNING "WARNING: %d siblings found for
CPU%d, should be %d\n", siblings, cpu, smp_num_siblings);
smp_num_siblings = siblings;
}
+
if (c->x86_num_cores > 1) {
for (i = 0; i < NR_CPUS; i++) {
if (!cpu_isset(i, cpu_callout_map))
diff -r 6d4c0bfc3c1c -r 6fa6c392d258
linux-2.6-xen-sparse/arch/xen/i386/kernel/traps.c
--- a/linux-2.6-xen-sparse/arch/xen/i386/kernel/traps.c Wed Aug 31 10:24:43 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/kernel/traps.c Thu Sep 1 08:25:22 2005
@@ -449,10 +449,10 @@
DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
DO_ERROR(12, SIGBUS, "stack segment", stack_segment)
DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0)
-DO_ERROR_INFO(32, SIGSEGV, "iret exception", iret_error, ILL_BADSTK, 0)
#ifdef CONFIG_X86_MCE
DO_ERROR(18, SIGBUS, "machine check", machine_check)
#endif
+DO_ERROR_INFO(32, SIGSEGV, "iret exception", iret_error, ILL_BADSTK, 0)
fastcall void do_general_protection(struct pt_regs * regs, long error_code)
{
diff -r 6d4c0bfc3c1c -r 6fa6c392d258
linux-2.6-xen-sparse/arch/xen/i386/mm/ioremap.c
--- a/linux-2.6-xen-sparse/arch/xen/i386/mm/ioremap.c Wed Aug 31 10:24:43 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/mm/ioremap.c Thu Sep 1 08:25:22 2005
@@ -19,37 +19,122 @@
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
-#ifndef CONFIG_XEN_PHYSDEV_ACCESS
-
-void * __ioremap(unsigned long phys_addr, unsigned long size,
- unsigned long flags)
-{
- return NULL;
-}
-
-void *ioremap_nocache (unsigned long phys_addr, unsigned long size)
-{
- return NULL;
-}
-
-void iounmap(volatile void __iomem *addr)
-{
-}
-
-#ifdef __i386__
-
-void __init *bt_ioremap(unsigned long phys_addr, unsigned long size)
-{
- return NULL;
-}
-
-void __init bt_iounmap(void *addr, unsigned long size)
-{
-}
-
-#endif /* __i386__ */
-
-#else
+#define ISA_START_ADDRESS 0x0
+#define ISA_END_ADDRESS 0x100000
+
+/* These hacky macros avoid phys->machine translations. */
+#define __direct_pte(x) ((pte_t) { (x) } )
+#define __direct_mk_pte(page_nr,pgprot) \
+ __direct_pte(((page_nr) << PAGE_SHIFT) | pgprot_val(pgprot))
+#define direct_mk_pte_phys(physpage, pgprot) \
+ __direct_mk_pte((physpage) >> PAGE_SHIFT, pgprot)
+
+
+static int direct_remap_area_pte_fn(pte_t *pte,
+ struct page *pte_page,
+ unsigned long address,
+ void *data)
+{
+ mmu_update_t **v = (mmu_update_t **)data;
+
+ (*v)->ptr = ((maddr_t)pfn_to_mfn(page_to_pfn(pte_page)) <<
+ PAGE_SHIFT) | ((unsigned long)pte & ~PAGE_MASK);
+ (*v)++;
+
+ return 0;
+}
+
+int direct_remap_area_pages(struct mm_struct *mm,
+ unsigned long address,
+ unsigned long machine_addr,
+ unsigned long size,
+ pgprot_t prot,
+ domid_t domid)
+{
+ int i;
+ unsigned long start_address;
+#define MAX_DIRECTMAP_MMU_QUEUE 130
+ mmu_update_t u[MAX_DIRECTMAP_MMU_QUEUE], *v = u, *w = u;
+
+ start_address = address;
+
+ flush_cache_all();
+
+ for (i = 0; i < size; i += PAGE_SIZE) {
+ if ((v - u) == MAX_DIRECTMAP_MMU_QUEUE) {
+ /* Fill in the PTE pointers. */
+ generic_page_range(mm, start_address,
+ address - start_address,
+ direct_remap_area_pte_fn, &w);
+ w = u;
+ if (HYPERVISOR_mmu_update(u, v - u, NULL, domid) < 0)
+ return -EFAULT;
+ v = u;
+ start_address = address;
+ }
+
+ /*
+ * Fill in the machine address: PTE ptr is done later by
+ * __direct_remap_area_pages().
+ */
+ v->val = pte_val_ma(pfn_pte_ma(machine_addr >> PAGE_SHIFT,
prot));
+
+ machine_addr += PAGE_SIZE;
+ address += PAGE_SIZE;
+ v++;
+ }
+
+ if (v != u) {
+ /* get the ptep's filled in */
+ generic_page_range(mm, start_address, address - start_address,
+ direct_remap_area_pte_fn, &w);
+ if (unlikely(HYPERVISOR_mmu_update(u, v - u, NULL, domid) < 0))
+ return -EFAULT;
+ }
+
+ flush_tlb_all();
+
+ return 0;
+}
+
+EXPORT_SYMBOL(direct_remap_area_pages);
+
+static int lookup_pte_fn(
+ pte_t *pte, struct page *pte_page, unsigned long addr, void *data)
+{
+ unsigned long *ptep = (unsigned long *)data;
+ if (ptep)
+ *ptep = (pfn_to_mfn(page_to_pfn(pte_page)) <<
+ PAGE_SHIFT) |
+ ((unsigned long)pte & ~PAGE_MASK);
+ return 0;
+}
+
+int create_lookup_pte_addr(struct mm_struct *mm,
+ unsigned long address,
+ unsigned long *ptep)
+{
+ return generic_page_range(mm, address, PAGE_SIZE, lookup_pte_fn, ptep);
+}
+
+EXPORT_SYMBOL(create_lookup_pte_addr);
+
+static int noop_fn(
+ pte_t *pte, struct page *pte_page, unsigned long addr, void *data)
+{
+ return 0;
+}
+
+int touch_pte_range(struct mm_struct *mm,
+ unsigned long address,
+ unsigned long size)
+{
+ return generic_page_range(mm, address, size, noop_fn, NULL);
+}
+
+EXPORT_SYMBOL(touch_pte_range);
+
+#ifdef CONFIG_XEN_PHYSDEV_ACCESS
/*
* Does @address reside within a non-highmem page that is local to this virtual
@@ -90,13 +175,12 @@
if (!size || last_addr < phys_addr)
return NULL;
-#ifdef CONFIG_XEN_PRIVILEGED_GUEST
/*
* Don't remap the low PCI/ISA area, it's always mapped..
*/
- if (phys_addr >= 0x0 && last_addr < 0x100000)
- return isa_bus_to_virt(phys_addr);
-#endif
+ if (xen_start_info.flags & SIF_PRIVILEGED &&
+ phys_addr >= ISA_START_ADDRESS && last_addr < ISA_END_ADDRESS)
+ return (void __iomem *) isa_bus_to_virt(phys_addr);
/*
* Don't allow anybody to remap normal RAM that we're using..
@@ -203,24 +287,32 @@
{
struct vm_struct *p;
if ((void __force *) addr <= high_memory)
- return;
-#ifdef CONFIG_XEN_PRIVILEGED_GUEST
+ return;
+
+ /*
+ * __ioremap special-cases the PCI/ISA range by not instantiating a
+ * vm_area and by simply returning an address into the kernel mapping
+ * of ISA space. So handle that here.
+ */
if ((unsigned long) addr >= fix_to_virt(FIX_ISAMAP_BEGIN))
return;
-#endif
- p = remove_vm_area((void *) (PAGE_MASK & (unsigned long __force) addr));
+
+ write_lock(&vmlist_lock);
+ p = __remove_vm_area((void *) (PAGE_MASK & (unsigned long __force)
addr));
if (!p) {
- printk("__iounmap: bad address %p\n", addr);
- return;
+ printk("iounmap: bad address %p\n", addr);
+ goto out_unlock;
}
if ((p->flags >> 20) && is_local_lowmem(p->phys_addr)) {
/* p->size includes the guard page, but cpa doesn't like that */
change_page_attr(virt_to_page(bus_to_virt(p->phys_addr)),
(p->size - PAGE_SIZE) >> PAGE_SHIFT,
- PAGE_KERNEL);
+ PAGE_KERNEL);
global_flush_tlb();
}
+out_unlock:
+ write_unlock(&vmlist_lock);
kfree(p);
}
@@ -237,13 +329,12 @@
if (!size || last_addr < phys_addr)
return NULL;
-#ifdef CONFIG_XEN_PRIVILEGED_GUEST
/*
* Don't remap the low PCI/ISA area, it's always mapped..
*/
- if (phys_addr >= 0x0 && last_addr < 0x100000)
+ if (xen_start_info.flags & SIF_PRIVILEGED &&
+ phys_addr >= ISA_START_ADDRESS && last_addr < ISA_END_ADDRESS)
return isa_bus_to_virt(phys_addr);
-#endif
/*
* Mappings have to be page-aligned
@@ -282,10 +373,8 @@
virt_addr = (unsigned long)addr;
if (virt_addr < fix_to_virt(FIX_BTMAP_BEGIN))
return;
-#ifdef CONFIG_XEN_PRIVILEGED_GUEST
if (virt_addr >= fix_to_virt(FIX_ISAMAP_BEGIN))
return;
-#endif
offset = virt_addr & ~PAGE_MASK;
nrpages = PAGE_ALIGN(offset + size - 1) >> PAGE_SHIFT;
@@ -299,119 +388,37 @@
#endif /* __i386__ */
+#else /* CONFIG_XEN_PHYSDEV_ACCESS */
+
+void __iomem * __ioremap(unsigned long phys_addr, unsigned long size,
+ unsigned long flags)
+{
+ return NULL;
+}
+
+void __iomem *ioremap_nocache (unsigned long phys_addr, unsigned long size)
+{
+ return NULL;
+}
+
+void iounmap(volatile void __iomem *addr)
+{
+}
+
+#ifdef __i386__
+
+void __init *bt_ioremap(unsigned long phys_addr, unsigned long size)
+{
+ return NULL;
+}
+
+void __init bt_iounmap(void *addr, unsigned long size)
+{
+}
+
+#endif /* __i386__ */
+
#endif /* CONFIG_XEN_PHYSDEV_ACCESS */
-
-/* These hacky macros avoid phys->machine translations. */
-#define __direct_pte(x) ((pte_t) { (x) } )
-#define __direct_mk_pte(page_nr,pgprot) \
- __direct_pte(((page_nr) << PAGE_SHIFT) | pgprot_val(pgprot))
-#define direct_mk_pte_phys(physpage, pgprot) \
- __direct_mk_pte((physpage) >> PAGE_SHIFT, pgprot)
-
-
-static int direct_remap_area_pte_fn(pte_t *pte,
- struct page *pte_page,
- unsigned long address,
- void *data)
-{
- mmu_update_t **v = (mmu_update_t **)data;
-
- (*v)->ptr = ((maddr_t)pfn_to_mfn(page_to_pfn(pte_page)) <<
- PAGE_SHIFT) | ((unsigned long)pte & ~PAGE_MASK);
- (*v)++;
-
- return 0;
-}
-
-int direct_remap_area_pages(struct mm_struct *mm,
- unsigned long address,
- unsigned long machine_addr,
- unsigned long size,
- pgprot_t prot,
- domid_t domid)
-{
- int i;
- unsigned long start_address;
-#define MAX_DIRECTMAP_MMU_QUEUE 130
- mmu_update_t u[MAX_DIRECTMAP_MMU_QUEUE], *v = u, *w = u;
-
- start_address = address;
-
- flush_cache_all();
-
- for (i = 0; i < size; i += PAGE_SIZE) {
- if ((v - u) == MAX_DIRECTMAP_MMU_QUEUE) {
- /* Fill in the PTE pointers. */
- generic_page_range(mm, start_address,
- address - start_address,
- direct_remap_area_pte_fn, &w);
- w = u;
- if (HYPERVISOR_mmu_update(u, v - u, NULL, domid) < 0)
- return -EFAULT;
- v = u;
- start_address = address;
- }
-
- /*
- * Fill in the machine address: PTE ptr is done later by
- * __direct_remap_area_pages().
- */
- v->val = pte_val_ma(pfn_pte_ma(machine_addr >> PAGE_SHIFT,
prot));
-
- machine_addr += PAGE_SIZE;
- address += PAGE_SIZE;
- v++;
- }
-
- if (v != u) {
- /* get the ptep's filled in */
- generic_page_range(mm, start_address, address - start_address,
- direct_remap_area_pte_fn, &w);
- if (unlikely(HYPERVISOR_mmu_update(u, v - u, NULL, domid) < 0))
- return -EFAULT;
- }
-
- flush_tlb_all();
-
- return 0;
-}
-
-EXPORT_SYMBOL(direct_remap_area_pages);
-
-static int lookup_pte_fn(
- pte_t *pte, struct page *pte_page, unsigned long addr, void *data)
-{
- unsigned long *ptep = (unsigned long *)data;
- if (ptep)
- *ptep = (pfn_to_mfn(page_to_pfn(pte_page)) <<
- PAGE_SHIFT) |
- ((unsigned long)pte & ~PAGE_MASK);
- return 0;
-}
-
-int create_lookup_pte_addr(struct mm_struct *mm,
- unsigned long address,
- unsigned long *ptep)
-{
- return generic_page_range(mm, address, PAGE_SIZE, lookup_pte_fn, ptep);
-}
-
-EXPORT_SYMBOL(create_lookup_pte_addr);
-
-static int noop_fn(
- pte_t *pte, struct page *pte_page, unsigned long addr, void *data)
-{
- return 0;
-}
-
-int touch_pte_range(struct mm_struct *mm,
- unsigned long address,
- unsigned long size)
-{
- return generic_page_range(mm, address, size, noop_fn, NULL);
-}
-
-EXPORT_SYMBOL(touch_pte_range);
/*
* Local variables:
diff -r 6d4c0bfc3c1c -r 6fa6c392d258
linux-2.6-xen-sparse/arch/xen/x86_64/Kconfig
--- a/linux-2.6-xen-sparse/arch/xen/x86_64/Kconfig Wed Aug 31 10:24:43 2005
+++ b/linux-2.6-xen-sparse/arch/xen/x86_64/Kconfig Thu Sep 1 08:25:22 2005
@@ -21,12 +21,12 @@
classical 32-bit x86 architecture. For details see
<http://www.x86-64.org/>.
-config X86
- bool
- default y
-
config 64BIT
def_bool y
+
+config X86
+ bool
+ default y
config MMU
bool
@@ -89,10 +89,11 @@
# Optimize for AMD Opteron/Athlon64/Hammer/K8 CPUs.
config MPSC
- bool "Intel x86-64"
+ bool "Intel EM64T"
help
- Optimize for Intel IA32 with 64bit extension CPUs
- (Prescott/Nocona/Potomac)
+ Optimize for Intel Pentium 4 and Xeon CPUs with Intel
+ Extended Memory 64 Technology(EM64T). For details see
+ <http://www.intel.com/technology/64bitextensions/>.
config GENERIC_CPU
bool "Generic-x86-64"
@@ -367,7 +368,6 @@
If unsure, say Y. Only embedded should say N here.
-
endmenu
#
diff -r 6d4c0bfc3c1c -r 6fa6c392d258 linux-2.6-xen-sparse/drivers/char/mem.c
--- a/linux-2.6-xen-sparse/drivers/char/mem.c Wed Aug 31 10:24:43 2005
+++ b/linux-2.6-xen-sparse/drivers/char/mem.c Thu Sep 1 08:25:22 2005
@@ -231,7 +231,7 @@
}
#endif
-static int mmap_kmem(struct file * file, struct vm_area_struct * vma)
+static int mmap_mem(struct file * file, struct vm_area_struct * vma)
{
#if defined(__HAVE_PHYS_MEM_ACCESS_PROT)
unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
@@ -258,7 +258,6 @@
return 0;
}
-#if 0
static int mmap_kmem(struct file * file, struct vm_area_struct * vma)
{
unsigned long long val;
@@ -275,7 +274,6 @@
vma->vm_pgoff = __pa(val) >> PAGE_SHIFT;
return mmap_mem(file, vma);
}
-#endif
extern long vread(char *buf, char *addr, unsigned long count);
extern long vwrite(char *buf, char *addr, unsigned long count);
@@ -731,7 +729,7 @@
.llseek = memory_lseek,
.read = read_mem,
.write = write_mem,
- .mmap = mmap_kmem,
+ .mmap = mmap_mem,
.open = open_mem,
};
#else
diff -r 6d4c0bfc3c1c -r 6fa6c392d258
linux-2.6-xen-sparse/include/asm-xen/asm-i386/mmu_context.h
--- a/linux-2.6-xen-sparse/include/asm-xen/asm-i386/mmu_context.h Wed Aug
31 10:24:43 2005
+++ b/linux-2.6-xen-sparse/include/asm-xen/asm-i386/mmu_context.h Thu Sep
1 08:25:22 2005
@@ -35,9 +35,9 @@
* happen before reload of cr3/ldt (i.e., not in __switch_to).
*/
asm volatile ( "mov %%fs,%0 ; mov %%gs,%1"
- : "=m" (*(int *)¤t->thread.fs),
- "=m" (*(int *)¤t->thread.gs));
- asm volatile ( "mov %0,%%fs ; mov %0,%%gs"
+ : "=m" (current->thread.fs),
+ "=m" (current->thread.gs));
+ asm volatile ( "movl %0,%%fs ; movl %0,%%gs"
: : "r" (0) );
}
diff -r 6d4c0bfc3c1c -r 6fa6c392d258
linux-2.6-xen-sparse/include/asm-xen/asm-i386/processor.h
--- a/linux-2.6-xen-sparse/include/asm-xen/asm-i386/processor.h Wed Aug 31
10:24:43 2005
+++ b/linux-2.6-xen-sparse/include/asm-xen/asm-i386/processor.h Thu Sep 1
08:25:22 2005
@@ -517,8 +517,8 @@
* This special macro can be used to load a debugging register
*/
#define loaddebug(thread,register) \
- HYPERVISOR_set_debugreg((register), \
- ((thread)->debugreg[register]))
+ HYPERVISOR_set_debugreg((register), \
+ ((thread)->debugreg[register]))
/* Forward declaration, a strange C thing */
struct task_struct;
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