Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[firefly-linux-kernel-4.4.55.git] / arch / x86 / kvm / svm.c

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 8e0c0844c6b9681e31e64bdeba0f1822108bec3e..74d825716f4fc158af4d52cd860bf63bbb8ccdf3 100644 (file)
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1173,6 +1173,10 @@ static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
        if (!is_mmio && !kvm_arch_has_assigned_device(vcpu->kvm))
                return 0;
 
+       if (!kvm_check_has_quirk(vcpu->kvm, KVM_X86_QUIRK_CD_NW_CLEARED) &&
+           kvm_read_cr0(vcpu) & X86_CR0_CD)
+               return _PAGE_NOCACHE;
+
        mtrr = kvm_mtrr_get_guest_memory_type(vcpu, gfn);
        return mtrr2protval[mtrr];
 }
@@ -1667,13 +1671,10 @@ static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
 
        if (!vcpu->fpu_active)
                cr0 |= X86_CR0_TS;
-       /*
-        * re-enable caching here because the QEMU bios
-        * does not do it - this results in some delay at
-        * reboot
-        */
-       if (kvm_check_has_quirk(vcpu->kvm, KVM_X86_QUIRK_CD_NW_CLEARED))
-               cr0 &= ~(X86_CR0_CD | X86_CR0_NW);
+
+       /* These are emulated via page tables.  */
+       cr0 &= ~(X86_CR0_CD | X86_CR0_NW);
+
        svm->vmcb->save.cr0 = cr0;
        mark_dirty(svm->vmcb, VMCB_CR);
        update_cr0_intercept(svm);
@@ -2106,6 +2107,7 @@ static void nested_svm_init_mmu_context(struct kvm_vcpu *vcpu)
        vcpu->arch.mmu.get_pdptr         = nested_svm_get_tdp_pdptr;
        vcpu->arch.mmu.inject_page_fault = nested_svm_inject_npf_exit;
        vcpu->arch.mmu.shadow_root_level = get_npt_level();
+       reset_shadow_zero_bits_mask(vcpu, &vcpu->arch.mmu);
        vcpu->arch.walk_mmu              = &vcpu->arch.nested_mmu;
 }