diff options
| author | Krish Sadhukhan <krish.sadhukhan@oracle.com> | 2019-04-08 17:35:12 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-04-16 15:39:03 +0200 |
| commit | de2bc2bfdf419ad9078736d88cae72beae972a59 (patch) | |
| tree | ee3fc5cfef8b92a9dc281978709da961995d346e | |
| parent | f6b0db1fdafad5fdbe10a4a3559da42d286435e6 (diff) | |
| download | linux-de2bc2bfdf419ad9078736d88cae72beae972a59.tar.bz2 | |
kvm: nVMX: Check "load IA32_PAT" VM-entry control on vmentry
According to section "Checking and Loading Guest State" in Intel SDM vol
3C, the following check is performed on vmentry:
If the "load IA32_PAT" VM-entry 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>
| -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 37cd5ebac4fb..8dc6a43cfdf3 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -2696,6 +2696,10 @@ static int nested_vmx_check_vmentry_postreqs(struct kvm_vcpu *vcpu, !nested_guest_cr4_valid(vcpu, vmcs12->guest_cr4)) return 1; + if ((vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_PAT) && + !kvm_pat_valid(vmcs12->guest_ia32_pat)) + return 1; + if (nested_vmx_check_vmcs_link_ptr(vcpu, vmcs12)) { *exit_qual = ENTRY_FAIL_VMCS_LINK_PTR; return 1; |