KVM: nVMX: Check GUEST_IA32_PERF_GLOBAL_CTRL on VM-Entry

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Add condition to nested_vmx_check_guest_state() to check the validity of
GUEST_IA32_PERF_GLOBAL_CTRL. Per Intel's SDM Vol 3 26.3.1.1:

  If the "load IA32_PERF_GLOBAL_CTRL" VM-entry 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>

...

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Oliver Upton 2019-11-13 16:17:16 -08:00 • committed by Paolo Bonzini

parent 9477f4449b

commit bfc6ad6ab3

1 changed files with 6 additions and 0 deletions

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arch/x86/kvm/vmx/nested.c

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