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KVM: Don't allow the guest to turn off the cpu cache

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The cpu cache is a host resource; the guest should not be able to turn
it off (even for itself).

Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Avi Kivity
2007-03-21 18:11:36 +02:00
parent 038881c8be
commit 6da63cf95f
1 changed files with 3 additions and 1 deletions
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4
drivers/kvm/svm.c
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@@ -737,8 +737,10 @@ static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
} }
#endif #endif
vcpu->svm->cr0 = cr0; vcpu->svm->cr0 = cr0;
vcpu->svm->vmcb->save.cr0 = cr0 | CR0_PG_MASK | CR0_WP_MASK;
vcpu->cr0 = cr0; vcpu->cr0 = cr0;
cr0 |= CR0_PG_MASK | CR0_WP_MASK;
cr0 &= ~(CR0_CD_MASK | CR0_NW_MASK);
vcpu->svm->vmcb->save.cr0 = cr0;
} }
static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)