提交 bcf166a9 编写于 作者: P Paolo Bonzini

Revert "KVM: svm: handle KVM_X86_QUIRK_CD_NW_CLEARED in svm_get_mt_mask"

This reverts commit 54928303.
It builds on the commit that is being reverted next.

Cc: stable@vger.kernel.org # 4.2+
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
上级 625422f6
......@@ -1177,10 +1177,6 @@ static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
if (!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];
}
......@@ -1676,10 +1672,13 @@ static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
if (!vcpu->fpu_active)
cr0 |= X86_CR0_TS;
/* These are emulated via page tables. */
cr0 &= ~(X86_CR0_CD | X86_CR0_NW);
/*
* 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);
svm->vmcb->save.cr0 = cr0;
mark_dirty(svm->vmcb, VMCB_CR);
update_cr0_intercept(svm);
......
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