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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] Enable compatibility mode operation for HYPERVISOR_multicall.
# HG changeset patch
# User Emmanuel Ackaouy <ack@xxxxxxxxxxxxx>
# Date 1168018474 0
# Node ID c2a82e026497733a315a46a3a39c69a58850b8bf
# Parent e5f24d5f71acbe0fe52ffbbab3817a189dc57ed6
Enable compatibility mode operation for HYPERVISOR_multicall.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
---
xen/arch/x86/x86_64/asm-offsets.c | 12 ++++++++++++
xen/arch/x86/x86_64/compat/entry.S | 1 -
xen/common/compat/Makefile | 2 ++
xen/common/compat/multicall.c | 31 +++++++++++++++++++++++++++++++
xen/common/multicall.c | 5 ++++-
xen/include/asm-x86/multicall.h | 25 +++++++++++++++++++++++++
xen/include/xen/multicall.h | 10 +++++++++-
7 files changed, 83 insertions(+), 3 deletions(-)
diff -r e5f24d5f71ac -r c2a82e026497 xen/arch/x86/x86_64/asm-offsets.c
--- a/xen/arch/x86/x86_64/asm-offsets.c Fri Jan 05 17:34:34 2007 +0000
+++ b/xen/arch/x86/x86_64/asm-offsets.c Fri Jan 05 17:34:34 2007 +0000
@@ -135,5 +135,17 @@ void __dummy__(void)
OFFSET(MULTICALL_result, struct multicall_entry, result);
BLANK();
+#ifdef CONFIG_COMPAT
+ OFFSET(COMPAT_MULTICALL_op, struct compat_multicall_entry, op);
+ OFFSET(COMPAT_MULTICALL_arg0, struct compat_multicall_entry, args[0]);
+ OFFSET(COMPAT_MULTICALL_arg1, struct compat_multicall_entry, args[1]);
+ OFFSET(COMPAT_MULTICALL_arg2, struct compat_multicall_entry, args[2]);
+ OFFSET(COMPAT_MULTICALL_arg3, struct compat_multicall_entry, args[3]);
+ OFFSET(COMPAT_MULTICALL_arg4, struct compat_multicall_entry, args[4]);
+ OFFSET(COMPAT_MULTICALL_arg5, struct compat_multicall_entry, args[5]);
+ OFFSET(COMPAT_MULTICALL_result, struct compat_multicall_entry, result);
+ BLANK();
+#endif
+
DEFINE(IRQSTAT_shift, LOG_2(sizeof(irq_cpustat_t)));
}
diff -r e5f24d5f71ac -r c2a82e026497 xen/arch/x86/x86_64/compat/entry.S
--- a/xen/arch/x86/x86_64/compat/entry.S Fri Jan 05 17:34:34 2007 +0000
+++ b/xen/arch/x86/x86_64/compat/entry.S Fri Jan 05 17:34:34 2007 +0000
@@ -279,7 +279,6 @@ CFIX14:
.section .rodata, "a", @progbits
#define compat_platform_op domain_crash_synchronous
-#define compat_multicall domain_crash_synchronous
#define compat_set_timer_op domain_crash_synchronous
#define compat_grant_table_op domain_crash_synchronous
#define compat_acm_op domain_crash_synchronous
diff -r e5f24d5f71ac -r c2a82e026497 xen/common/compat/Makefile
--- a/xen/common/compat/Makefile Fri Jan 05 17:34:34 2007 +0000
+++ b/xen/common/compat/Makefile Fri Jan 05 17:34:34 2007 +0000
@@ -1,7 +1,9 @@ obj-y += domain.o
obj-y += domain.o
obj-y += kernel.o
obj-y += memory.o
+obj-y += multicall.o
obj-y += xlat.o
# extra dependencies
kernel.o: ../kernel.c
+multicall.o: ../multicall.c
diff -r e5f24d5f71ac -r c2a82e026497 xen/common/compat/multicall.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/common/compat/multicall.c Fri Jan 05 17:34:34 2007 +0000
@@ -0,0 +1,31 @@
+/******************************************************************************
+ * multicall.c
+ */
+
+#include <xen/config.h>
+#include <xen/types.h>
+#include <xen/multicall.h>
+
+#define COMPAT
+typedef int ret_t;
+#undef do_multicall_call
+
+DEFINE_XEN_GUEST_HANDLE(multicall_entry_compat_t);
+#define multicall_entry compat_multicall_entry
+#define multicall_entry_t multicall_entry_compat_t
+#define do_multicall_call compat_multicall_call
+#define call compat_call
+#define do_multicall(l, n) compat_multicall(_##l, n)
+#define _XEN_GUEST_HANDLE(t) XEN_GUEST_HANDLE(t)
+
+#include "../multicall.c"
+
+/*
+ * Local variables:
+ * mode: C
+ * c-set-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
diff -r e5f24d5f71ac -r c2a82e026497 xen/common/multicall.c
--- a/xen/common/multicall.c Fri Jan 05 17:34:34 2007 +0000
+++ b/xen/common/multicall.c Fri Jan 05 17:34:34 2007 +0000
@@ -13,9 +13,12 @@
#include <asm/current.h>
#include <asm/hardirq.h>
+#ifndef COMPAT
DEFINE_PER_CPU(struct mc_state, mc_state);
+typedef long ret_t;
+#endif
-long
+ret_t
do_multicall(
XEN_GUEST_HANDLE(multicall_entry_t) call_list, unsigned int nr_calls)
{
diff -r e5f24d5f71ac -r c2a82e026497 xen/include/asm-x86/multicall.h
--- a/xen/include/asm-x86/multicall.h Fri Jan 05 17:34:34 2007 +0000
+++ b/xen/include/asm-x86/multicall.h Fri Jan 05 17:34:34 2007 +0000
@@ -35,6 +35,31 @@
"r8", "r9", "r10", "r11" ); \
} while ( 0 )
+#define compat_multicall_call(_call) \
+ do { \
+ __asm__ __volatile__ ( \
+ " movl "STR(COMPAT_MULTICALL_op)"(%0),%%eax; " \
+ " leaq compat_hypercall_table(%%rip),%%rdi; " \
+ " cmpl $("STR(NR_hypercalls)"),%%eax; " \
+ " jae 2f; " \
+ " movq (%%rdi,%%rax,8),%%rax; " \
+ " movl "STR(COMPAT_MULTICALL_arg0)"(%0),%%edi; " \
+ " movl "STR(COMPAT_MULTICALL_arg1)"(%0),%%esi; " \
+ " movl "STR(COMPAT_MULTICALL_arg2)"(%0),%%edx; " \
+ " movl "STR(COMPAT_MULTICALL_arg3)"(%0),%%ecx; " \
+ " movl "STR(COMPAT_MULTICALL_arg4)"(%0),%%r8d; " \
+ " callq *%%rax; " \
+ "1: movl %%eax,"STR(COMPAT_MULTICALL_result)"(%0)\n"\
+ ".section .fixup,\"ax\"\n" \
+ "2: movl $-"STR(ENOSYS)",%%eax\n" \
+ " jmp 1b\n" \
+ ".previous\n" \
+ : : "b" (_call) \
+ /* all the caller-saves registers */ \
+ : "rax", "rcx", "rdx", "rsi", "rdi", \
+ "r8", "r9", "r10", "r11" ); \
+ } while ( 0 )
+
#else
#define do_multicall_call(_call) \
diff -r e5f24d5f71ac -r c2a82e026497 xen/include/xen/multicall.h
--- a/xen/include/xen/multicall.h Fri Jan 05 17:34:34 2007 +0000
+++ b/xen/include/xen/multicall.h Fri Jan 05 17:34:34 2007 +0000
@@ -7,6 +7,9 @@
#include <xen/percpu.h>
#include <asm/multicall.h>
+#ifdef CONFIG_COMPAT
+#include <compat/xen.h>
+#endif
#define _MCSF_in_multicall 0
#define _MCSF_call_preempted 1
@@ -14,7 +17,12 @@
#define MCSF_call_preempted (1<<_MCSF_call_preempted)
struct mc_state {
unsigned long flags;
- struct multicall_entry call;
+ union {
+ struct multicall_entry call;
+#ifdef CONFIG_COMPAT
+ struct compat_multicall_entry compat_call;
+#endif
+ };
};
DECLARE_PER_CPU(struct mc_state, mc_state);
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