Commit f1cdecf5 authored by Sean Christopherson's avatar Sean Christopherson Committed by Paolo Bonzini
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KVM: x86: Ensure all logical CPUs have consistent reserved cr4 bits 



Check the current CPU's reserved cr4 bits against the mask calculated
for the boot CPU to ensure consistent behavior across all CPUs.

Signed-off-by: default avatarSean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent b11306b5

arch/x86/kvm/x86.c

+7 −0
Original line number Diff line number Diff line
@@ -9461,6 +9461,13 @@ void kvm_arch_hardware_unsetup(void) 


int kvm_arch_check_processor_compat(void)

{

	struct cpuinfo_x86 *c = &cpu_data(smp_processor_id());



	WARN_ON(!irqs_disabled());



	if (kvm_host_cr4_reserved_bits(c) != cr4_reserved_bits)

		return -EIO;



	return kvm_x86_ops->check_processor_compatibility();

}