aboutsummaryrefslogtreecommitdiff
path: root/include/asm-x86_64/msr.h
diff options
context:
space:
mode:
authorAndi Kleen <ak@suse.de>2005-09-12 18:49:24 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-12 10:50:57 -0700
commit059bf0f6c33058680e4381f17d554baaa4f45d68 (patch)
tree39828a86a1bcd0db6047f369e618b61cb79bc39b /include/asm-x86_64/msr.h
parent55679edb19f5ee1dcb0147afe2f198a10ef963f0 (diff)
[PATCH] x86-64: Merge msr.c with i386 version
The only difference was the inline assembly, so move that into asm/msr.h and merge with the i386 version. This adds some missing sysfs support code to x86-64. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-x86_64/msr.h')
-rw-r--r--include/asm-x86_64/msr.h39
1 files changed, 27 insertions, 12 deletions
diff --git a/include/asm-x86_64/msr.h b/include/asm-x86_64/msr.h
index 15a6ef7cf3d..4d727f3f555 100644
--- a/include/asm-x86_64/msr.h
+++ b/include/asm-x86_64/msr.h
@@ -29,22 +29,37 @@
#define wrmsrl(msr,val) wrmsr(msr,(__u32)((__u64)(val)),((__u64)(val))>>32)
/* wrmsr with exception handling */
-#define wrmsr_safe(msr,a,b) ({ int ret__; \
- asm volatile("2: wrmsr ; xorl %0,%0\n" \
- "1:\n\t" \
- ".section .fixup,\"ax\"\n\t" \
- "3: movl %4,%0 ; jmp 1b\n\t" \
- ".previous\n\t" \
- ".section __ex_table,\"a\"\n" \
- " .align 8\n\t" \
- " .quad 2b,3b\n\t" \
- ".previous" \
- : "=a" (ret__) \
- : "c" (msr), "0" (a), "d" (b), "i" (-EFAULT));\
+#define wrmsr_safe(msr,a,b) ({ int ret__; \
+ asm volatile("2: wrmsr ; xorl %0,%0\n" \
+ "1:\n\t" \
+ ".section .fixup,\"ax\"\n\t" \
+ "3: movl %4,%0 ; jmp 1b\n\t" \
+ ".previous\n\t" \
+ ".section __ex_table,\"a\"\n" \
+ " .align 8\n\t" \
+ " .quad 2b,3b\n\t" \
+ ".previous" \
+ : "=a" (ret__) \
+ : "c" (msr), "0" (a), "d" (b), "i" (-EFAULT)); \
ret__; })
#define checking_wrmsrl(msr,val) wrmsr_safe(msr,(u32)(val),(u32)((val)>>32))
+#define rdmsr_safe(msr,a,b) \
+ ({ int ret__; \
+ asm volatile ("1: rdmsr\n" \
+ "2:\n" \
+ ".section .fixup,\"ax\"\n" \
+ "3: movl %4,%0\n" \
+ " jmp 2b\n" \
+ ".previous\n" \
+ ".section __ex_table,\"a\"\n" \
+ " .align 8\n" \
+ " .quad 1b,3b\n" \
+ ".previous":"=&bDS" (ret__), "=a"(a), "=d"(b)\
+ :"c"(msr), "i"(-EIO), "0"(0)); \
+ ret__; })
+
#define rdtsc(low,high) \
__asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high))