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x86: cpu_emergency_svm_disable() function

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This function can be used by the reboot or kdump code to forcibly
disable SVM on the CPU.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Eduardo Habkost 2008-11-17 19:03:22 -02:00 committed by Avi Kivity
parent 2c8dceebb2
commit 0f3e9eeba0
1 changed files with 8 additions and 0 deletions
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8
arch/x86/include/asm/virtext.h
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@ -121,4 +121,12 @@ static inline void cpu_svm_disable(void)
wrmsrl(MSR_EFER, efer & ~MSR_EFER_SVME_MASK);
}
/** Makes sure SVM is disabled, if it is supported on the CPU
*/
static inline void cpu_emergency_svm_disable(void)
{
if (cpu_has_svm(NULL))
cpu_svm_disable();
}
#endif /* _ASM_X86_VIRTEX_H */