[PATCH] mce: use safe MSR accesses

[<jesse.larrew@amd.com>]

From: Jesse Larrew <jesse.larrew@amd.com>

When running as a guest under kvm, it's possible that the MSR
being accessed may not be implemented. All MSR accesses should
be prepared to handle exceptions.

Signed-off-by: Jesse Larrew <jesse.larrew@amd.com>
---
 arch/x86/kernel/cpu/mcheck/mce.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 61a9668ce..4151ba9 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -1556,12 +1556,12 @@ static int __mcheck_cpu_apply_quirks(struct cpuinfo_x86 *c)
 				 wrmsrl(MSR_K7_HWCR, hwcr | BIT(18));
 
 			 for (i = 0; i < ARRAY_SIZE(msrs); i++) {
-				 rdmsrl(msrs[i], val);
+				 rdmsrl_safe(msrs[i], &val);
 
 				 /* CntP bit set? */
 				 if (val & BIT_64(62)) {
 					val &= ~BIT_64(62);
-					wrmsrl(msrs[i], val);
+					wrmsrl_safe(msrs[i], val);
 				 }
 			 }
 
-- 
1.9.1