Thanks for your review, Paolo!


On 06/01/2015 05:11 PM, Paolo Bonzini wrote:

  struct kvm_vcpu_arch {
diff --git a/arch/x86/kvm/mtrr.c b/arch/x86/kvm/mtrr.c
index 562341b..6de49dd 100644
--- a/arch/x86/kvm/mtrr.c
+++ b/arch/x86/kvm/mtrr.c
@@ -105,7 +105,6 @@ EXPORT_SYMBOL_GPL(kvm_mtrr_valid);
  static void update_mtrr(struct kvm_vcpu *vcpu, u32 msr)
  {
        struct kvm_mtrr *mtrr_state = &vcpu->arch.mtrr_state;
-       unsigned char mtrr_enabled = mtrr_state->enabled;
        gfn_t start, end, mask;
        int index;
        bool is_fixed = true;
@@ -114,7 +113,7 @@ static void update_mtrr(struct kvm_vcpu *vcpu, u32 msr)
              !kvm_arch_has_noncoherent_dma(vcpu->kvm))
                return;

-       if (!(mtrr_enabled & 0x2) && msr != MSR_MTRRdefType)
+       if (!mtrr_state->mtrr_enabled && msr != MSR_MTRRdefType)

I know Linus doesn't like bitfields too much.  Can you change these to
inline functions, and only leave an "u64 deftype" in the struct?


Sure. I will introduce mtrr_is_enabled() and fixed_mtrr_is_enabled() instead
of these bitfields.

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