Displaying 1 result from an estimated 1 matches for "wrmsr_amd".
2010 Oct 07
0
[PATCH] x86-64: workaround for BIOSes wrongly enabling LAHF_LM feature indicator
...ng in the hypervisor rather than each
kernel) is to suppress the warnings in the Xen log each Linux guest
would cause due to the disallowed wrmsr.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
--- a/xen/arch/x86/cpu/amd.c
+++ b/xen/arch/x86/cpu/amd.c
@@ -43,6 +43,47 @@ static inline void wrmsr_amd(unsigned in
);
}
+static inline int rdmsr_amd_safe(unsigned int msr, unsigned int *lo,
+ unsigned int *hi)
+{
+ int err;
+
+ asm volatile("1: rdmsr\n2:\n"
+ ".section .fixup,\"ax\"\n"
+ "3: movl %6,%2\n"
+ " jmp 2b\n"
+...