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Merge git://git.kernel.org/pub/scm/virt/kvm/kvm

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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()
This commit is contained in:
Linus Torvalds 2012-11-16 16:49:10 -08:00
commit 51844b0f04
1 changed files with 7 additions and 4 deletions
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11
arch/x86/kvm/vmx.c
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@ -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);
}