Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

x86: make fixups wordsize agnostic

Browse source 
This patch uses the _ASM_ALIGN and _ASM_PTR macros
to make the fixups in native_read/write_msr_safe look the same
for x86_64 and i386. Besides using this macros, we also have to
take the explicit instruction suffixes out. It's okay
because all this instructions uses registers, and can be sized by
them.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Glauber de Oliveira Costa 2008-01-30 13:31:07 +01:00 committed by Ingo Molnar
parent c9dcda5ce4
commit 56ec1ddcff
1 changed files with 9 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

17
include/asm-x86/msr.h
View file

@ -33,6 +33,7 @@ static inline unsigned long long native_read_tscp(int *aux)
#ifdef __KERNEL__
#ifndef __ASSEMBLY__
#include <asm/asm.h>
#include <asm/errno.h>
static inline unsigned long long native_read_msr(unsigned int msr)
@ -48,14 +49,14 @@ static inline unsigned long long native_read_msr_safe(unsigned int msr,
{
unsigned long long val;
asm volatile("2: rdmsr ; xorl %0,%0\n"
asm volatile("2: rdmsr ; xor %0,%0\n"
"1:\n\t"
".section .fixup,\"ax\"\n\t"
"3: movl %3,%0 ; jmp 1b\n\t"
"3: mov %3,%0 ; jmp 1b\n\t"
".previous\n\t"
".section __ex_table,\"a\"\n"
" .align 4\n\t"
" .long 2b,3b\n\t"
_ASM_ALIGN "\n\t"
_ASM_PTR " 2b,3b\n\t"
".previous"
: "=r" (*err), "=A" (val)
: "c" (msr), "i" (-EFAULT));
@ -73,14 +74,14 @@ static inline int native_write_msr_safe(unsigned int msr,
unsigned low, unsigned high)
{
int err;
asm volatile("2: wrmsr ; xorl %0,%0\n"
asm volatile("2: wrmsr ; xor %0,%0\n"
"1:\n\t"
".section .fixup,\"ax\"\n\t"
"3: movl %4,%0 ; jmp 1b\n\t"
"3: mov %4,%0 ; jmp 1b\n\t"
".previous\n\t"
".section __ex_table,\"a\"\n"
" .align 4\n\t"
" .long 2b,3b\n\t"
_ASM_ALIGN "\n\t"
_ASM_PTR " 2b,3b\n\t"
".previous"
: "=a" (err)
: "c" (msr), "0" (low), "d" (high),