diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/virtext.h | 14 | ||||
| -rw-r--r-- | arch/x86/kvm/svm.c | 6 |
2 files changed, 15 insertions, 5 deletions
diff --git a/arch/x86/include/asm/virtext.h b/arch/x86/include/asm/virtext.h index 6f0d409c3682..2cfe363729c3 100644 --- a/arch/x86/include/asm/virtext.h +++ b/arch/x86/include/asm/virtext.h @@ -107,4 +107,18 @@ static inline int cpu_has_svm(const char **msg) return 1; } + +/** Disable SVM on the current CPU + * + * You should call this only if cpu_has_svm() returned true. + */ +static inline void cpu_svm_disable(void) +{ + uint64_t efer; + + wrmsrl(MSR_VM_HSAVE_PA, 0); + rdmsrl(MSR_EFER, efer); + wrmsrl(MSR_EFER, efer & ~MSR_EFER_SVME_MASK); +} + #endif /* _ASM_X86_VIRTEX_H */ diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 0667c6d13d30..1452851ae258 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -259,11 +259,7 @@ static int has_svm(void) static void svm_hardware_disable(void *garbage) { - uint64_t efer; - - wrmsrl(MSR_VM_HSAVE_PA, 0); - rdmsrl(MSR_EFER, efer); - wrmsrl(MSR_EFER, efer & ~MSR_EFER_SVME_MASK); + cpu_svm_disable(); } static void svm_hardware_enable(void *garbage) |