X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=arch%2Farch-x86.h;h=385a9124ec5ee9ef416201ba6d730b6d3aafd7e1;hb=7b2dfab10422559d2454f07967247d57bd50a52b;hp=8eea5381f41a75443a4cd200286b4690d62ffd79;hpb=29df29eaf88958c8741103d2056a4773d4959d9d;p=fio.git

diff --git a/arch/arch-x86.h b/arch/arch-x86.h
index 8eea5381..385a9124 100644
--- a/arch/arch-x86.h
+++ b/arch/arch-x86.h
@@ -1,6 +1,15 @@
 #ifndef ARCH_X86_H
 #define ARCH_X86_H
 
+static inline void do_cpuid(unsigned int *eax, unsigned int *ebx,
+			    unsigned int *ecx, unsigned int *edx)
+{
+	asm volatile("xchgl %%ebx, %1\ncpuid\nxchgl %%ebx, %1"
+		: "=a" (*eax), "=r" (*ebx), "=c" (*ecx), "=d" (*edx)
+		: "0" (*eax)
+		: "memory");
+}
+
 #include "arch-x86-common.h"
 
 #define FIO_ARCH	(arch_i386)