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authorEduardo Habkost <ehabkost@redhat.com>2008-11-17 19:03:22 -0200
committerAvi Kivity <avi@redhat.com>2008-12-31 16:52:30 +0200
commit0f3e9eeba0ea212bbea88790729d054b700ab91e (patch)
tree1882e6c45d57bc58404fcd4b1fe1651569441130
parent2c8dceebb238680d5577500f8283397d41ca5590 (diff)
x86: cpu_emergency_svm_disable() function
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>
-rw-r--r--arch/x86/include/asm/virtext.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/include/asm/virtext.h b/arch/x86/include/asm/virtext.h
index 2cfe363729c..59363627523 100644
--- a/arch/x86/include/asm/virtext.h
+++ b/arch/x86/include/asm/virtext.h
@@ -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 */