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authorLinus Torvalds <torvalds@linux-foundation.org>2012-11-16 16:49:10 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-11-16 16:49:10 -0800
commit51844b0f04d8f6ffff34bb7de74ea2dfc7eb1642 (patch)
tree7b58814024f217d2e1eab1150d8f578d522593e4
parent0cad3ff40486e341715cac3b5ef7b135fa0ba316 (diff)
parent29282fde80d44e587f8c152b10049a56e61659f0 (diff)
Merge git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fix from Marcelo Tosatti: "A correction for oops on module init with older Intel hosts." * git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: x86: Fix invalid secondary exec controls in vmx_cpuid_update()
-rw-r--r--arch/x86/kvm/vmx.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index ad6b1dd06f8b..f85815945fc6 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -6549,19 +6549,22 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
}
}
- exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL);
/* Exposing INVPCID only when PCID is exposed */
best = kvm_find_cpuid_entry(vcpu, 0x7, 0);
if (vmx_invpcid_supported() &&
best && (best->ebx & bit(X86_FEATURE_INVPCID)) &&
guest_cpuid_has_pcid(vcpu)) {
+ exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL);
exec_control |= SECONDARY_EXEC_ENABLE_INVPCID;
vmcs_write32(SECONDARY_VM_EXEC_CONTROL,
exec_control);
} else {
- exec_control &= ~SECONDARY_EXEC_ENABLE_INVPCID;
- vmcs_write32(SECONDARY_VM_EXEC_CONTROL,
- exec_control);
+ if (cpu_has_secondary_exec_ctrls()) {
+ exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL);
+ exec_control &= ~SECONDARY_EXEC_ENABLE_INVPCID;
+ vmcs_write32(SECONDARY_VM_EXEC_CONTROL,
+ exec_control);
+ }
if (best)
best->ebx &= ~bit(X86_FEATURE_INVPCID);
}