KVM: vmx: fix MPX detection

commit 920c837785699bcc48f4a729ba9ee3492f620b95 upstream.

kvm_x86_ops is still NULL at this point.  Since kvm_init_msr_list
cannot fail, it is safe to initialize it before the call.

Fixes: 93c4adc7afedf9b0ec190066d45b6d67db5270da
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Tested-by: Jet Chen <jet.chen@intel.com>
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: Brad Spengler <spender@grsecurity.net>
[bwh: Dependency of "KVM: x86: expose MSR_TSC_AUX to userspace",
 applied in 3.2.77]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index d47d153..09dab5b 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5257,9 +5257,10 @@ int kvm_arch_init(void *opaque)
                goto out;
 
        kvm_set_mmio_spte_mask();
                goto out;
 
        kvm_set_mmio_spte_mask();

-       kvm_init_msr_list();

 
        kvm_x86_ops = ops;
 
        kvm_x86_ops = ops;

+       kvm_init_msr_list();
+

        kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK,
                        PT_DIRTY_MASK, PT64_NX_MASK, 0);
 
        kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK,
                        PT_DIRTY_MASK, PT64_NX_MASK, 0);