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KVM: nVMX: Don't update GUEST_BNDCFGS if it's clean in HV eVMCS 

L1 is responsible for dirtying GUEST_GRP1 if it writes GUEST_BNDCFGS.

Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2019-05-07 09:06:39 -07:00 committed by Paolo Bonzini
parent 699a1ac214
commit c27e5b0d13
1 changed files with 4 additions and 4 deletions
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8
arch/x86/kvm/vmx/nested.c
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@ -2197,6 +2197,10 @@ static void prepare_vmcs02_rare(struct vcpu_vmx *vmx, struct vmcs12 *vmcs12)
vmcs_write64(GUEST_PDPTR2, vmcs12->guest_pdptr2);
vmcs_write64(GUEST_PDPTR3, vmcs12->guest_pdptr3);
}
if (kvm_mpx_supported() && vmx->nested.nested_run_pending &&
(vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS))
vmcs_write64(GUEST_BNDCFGS, vmcs12->guest_bndcfgs);
}
if (nested_cpu_has_xsaves(vmcs12))
@ -2232,10 +2236,6 @@ static void prepare_vmcs02_rare(struct vcpu_vmx *vmx, struct vmcs12 *vmcs12)
vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, vmx->msr_autoload.guest.nr);
set_cr4_guest_host_mask(vmx);
if (kvm_mpx_supported() && vmx->nested.nested_run_pending &&
(vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS))
vmcs_write64(GUEST_BNDCFGS, vmcs12->guest_bndcfgs);
}
/*