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KVM: SVM: Prepare for new bit definition in lbr_ctl

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The lbr_ctl variable in the vmcb control area is used to enable or
disable Last Branch Record (LBR) virtualization. However, this is to be
done using only bit 0 of the variable. To correct this and to prepare
for a new feature, change the current usage to work only on a particular
bit.

Signed-off-by: Janakarajan Natarajan <Janakarajan.Natarajan@amd.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
This commit is contained in:
Janakarajan Natarajan
2017-07-06 15:50:44 -05:00
committed by Radim Krčmář
parent b742c1e6e7
commit 8a77e90966
2 changed files with 4 additions and 2 deletions
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arch/x86/include/asm/svm.h
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@@ -119,6 +119,8 @@ struct __attribute__ ((__packed__)) vmcb_control_area {
#define AVIC_ENABLE_SHIFT 31
#define AVIC_ENABLE_MASK (1 << AVIC_ENABLE_SHIFT)
#define LBR_CTL_ENABLE_MASK BIT_ULL(0)
#define SVM_INTERRUPT_SHADOW_MASK 1
#define SVM_IOIO_STR_SHIFT 2