From: Krish Sadhukhan Date: Mon, 8 Apr 2019 21:35:12 +0000 (-0400) Subject: kvm: nVMX: Check "load IA32_PAT" VM-entry control on vmentry X-Git-Tag: v5.15~6315^2~53 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=de2bc2bfdf419ad9078736d88cae72beae972a59;p=platform%2Fkernel%2Flinux-starfive.git 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 Reviewed-by: Karl Heubaum Suggested-by: Sean Christopherson Reviewed-by: Sean Christopherson Reviewed-by: Jim Mattson Signed-off-by: Paolo Bonzini --- diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index 37cd5eb..8dc6a43 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;