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| author | Krish Sadhukhan <krish.sadhukhan@oracle.com> | 2019-04-08 23:35:11 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-04-16 15:39:02 +0200 |
| commit | f6b0db1fdafad5fdbe10a4a3559da42d286435e6 (patch) | |
| tree | 108cc1c4c25952e0a8a0df276f81f75c701a7734 /arch/x86/kvm/vmx | |
| parent | KVM: x86: optimize check for valid PAT value (diff) | |
| download | linux-f6b0db1fdafad5fdbe10a4a3559da42d286435e6.tar.xz linux-f6b0db1fdafad5fdbe10a4a3559da42d286435e6.zip | |
kvm: nVMX: Check "load IA32_PAT" VM-exit control on vmentry
According to section "Checks on Host Control Registers and MSRs" in Intel
SDM vol 3C, the following check is performed on vmentry:
If the "load IA32_PAT" VM-exit control is 1, the value of the field
for the IA32_PAT MSR must be one that could be written by WRMSR
without fault at CPL 0. Specifically, each of the 8 bytes in the
field must have one of the values 0 (UC), 1 (WC), 4 (WT), 5 (WP),
6 (WB), or 7 (UC-).
Signed-off-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
Reviewed-by: Karl Heubaum <karl.heubaum@oracle.com>
Suggested-by: Sean Christopherson <sean.j.christopherson@intel.com>
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx')
| -rw-r--r-- | arch/x86/kvm/vmx/nested.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index 6401eb7ef19c..37cd5ebac4fb 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -2606,6 +2606,10 @@ static int nested_check_host_control_regs(struct kvm_vcpu *vcpu, is_noncanonical_address(vmcs12->host_ia32_sysenter_eip, vcpu)) return -EINVAL; + if ((vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_PAT) && + !kvm_pat_valid(vmcs12->host_ia32_pat)) + return -EINVAL; + /* * If the load IA32_EFER VM-exit control is 1, bits reserved in the * IA32_EFER MSR must be 0 in the field for that register. In addition, |