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| author | Eduardo Habkost <ehabkost@redhat.com> | 2008-11-17 22:03:21 +0100 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2008-12-31 15:52:30 +0100 |
| commit | 2c8dceebb238680d5577500f8283397d41ca5590 (patch) | |
| tree | 5b96cfa8c5f89a79e0da1e8be91d5eb1a9b51fa4 /arch/x86/include | |
| parent | KVM: SVM: move has_svm() code to asm/virtext.h (diff) | |
| download | linux-2c8dceebb238680d5577500f8283397d41ca5590.tar.xz linux-2c8dceebb238680d5577500f8283397d41ca5590.zip | |
KVM: SVM: move svm_hardware_disable() code to asm/virtext.h
Create cpu_svm_disable() function.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/virtext.h | 14 |
1 files changed, 14 insertions, 0 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 */ |