From: Jim Mattson jmattson@google.com
[ Upstream commit cb957adb4ea422bd758568df5b2478ea3bb34f35 ]
See the SDM, volume 3, section 4.4.1:
If PAE paging would be in use following an execution of MOV to CR0 or MOV to CR4 (see Section 4.1.1) and the instruction is modifying any of CR0.CD, CR0.NW, CR0.PG, CR4.PAE, CR4.PGE, CR4.PSE, or CR4.SMEP; then the PDPTEs are loaded from the address in CR3.
Fixes: b9baba8614890 ("KVM, pkeys: expose CPUID/CR4 to guest") Cc: Huaitong Han huaitong.han@intel.com Signed-off-by: Jim Mattson jmattson@google.com Reviewed-by: Peter Shier pshier@google.com Reviewed-by: Oliver Upton oupton@google.com Message-Id: 20200817181655.3716509-1-jmattson@google.com Signed-off-by: Paolo Bonzini pbonzini@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/x86/kvm/x86.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 1721a8c8eb26c..8920ee7b28811 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -972,7 +972,7 @@ int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) { unsigned long old_cr4 = kvm_read_cr4(vcpu); unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE | - X86_CR4_SMEP | X86_CR4_PKE; + X86_CR4_SMEP;
if (kvm_valid_cr4(vcpu, cr4)) return 1;