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KVM: nVMX: Check HOST_IA32_PERF_GLOBAL_CTRL on VM-Entry 

Add a consistency check on nested vm-entry for host's
IA32_PERF_GLOBAL_CTRL from vmcs12. Per Intel's SDM Vol 3 26.2.2:

  If the "load IA32_PERF_GLOBAL_CTRL"
  VM-exit control is 1, bits reserved in the IA32_PERF_GLOBAL_CTRL
  MSR must be 0 in the field for that register"

Suggested-by: Jim Mattson <jmattson@google.com>
Co-developed-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
Signed-off-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
Signed-off-by: Oliver Upton <oupton@google.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Peter Shier <pshier@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Oliver Upton 2019-11-13 16:17:17 -08:00 committed by Paolo Bonzini
parent bfc6ad6ab3
commit c547cb6f78
1 changed files with 5 additions and 0 deletions
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5
arch/x86/kvm/vmx/nested.c
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@ -2676,6 +2676,11 @@ static int nested_vmx_check_host_state(struct kvm_vcpu *vcpu,
CC(!kvm_pat_valid(vmcs12->host_ia32_pat)))
return -EINVAL;
if ((vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL) &&
CC(!kvm_valid_perf_global_ctrl(vcpu_to_pmu(vcpu),
vmcs12->host_ia32_perf_global_ctrl)))
return -EINVAL;
#ifdef CONFIG_X86_64
ia32e = !!(vcpu->arch.efer & EFER_LMA);
#else