From mboxrd@z Thu Jan 1 00:00:00 1970 From: KarimAllah Ahmed Subject: [PATCH v6 06/14] KVM/nVMX: Use kvm_vcpu_map when mapping the L1 MSR bitmap Date: Thu, 31 Jan 2019 21:24:36 +0100 Message-ID: <1548966284-28642-7-git-send-email-karahmed@amazon.de> References: <1548966284-28642-1-git-send-email-karahmed@amazon.de> Cc: KarimAllah Ahmed To: x86@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= , Paolo Bonzini Return-path: In-Reply-To: <1548966284-28642-1-git-send-email-karahmed@amazon.de> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org Use kvm_vcpu_map when mapping the L1 MSR bitmap since using kvm_vcpu_gpa_to_page() and kmap() will only work for guest memory that has a "struct page". Signed-off-by: KarimAllah Ahmed --- v4 -> v5: - unmap with dirty flag v1 -> v2: - Do not change the lifecycle of the mapping (pbonzini) --- arch/x86/kvm/vmx/nested.c | 11 +++++------ arch/x86/kvm/vmx/vmx.h | 3 +++ 2 files changed, 8 insertions(+), 6 deletions(-) diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index 8fc327f..1813211 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -507,9 +507,10 @@ static inline bool nested_vmx_prepare_msr_bitmap(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) { int msr; - struct page *page; unsigned long *msr_bitmap_l1; unsigned long *msr_bitmap_l0 = to_vmx(vcpu)->nested.vmcs02.msr_bitmap; + struct kvm_host_map *map = &to_vmx(vcpu)->nested.msr_bitmap_map; + /* * pred_cmd & spec_ctrl are trying to verify two things: * @@ -535,11 +536,10 @@ static inline bool nested_vmx_prepare_msr_bitmap(struct kvm_vcpu *vcpu, !pred_cmd && !spec_ctrl) return false; - page = kvm_vcpu_gpa_to_page(vcpu, vmcs12->msr_bitmap); - if (is_error_page(page)) + if (kvm_vcpu_map(vcpu, gpa_to_gfn(vmcs12->msr_bitmap), map)) return false; - msr_bitmap_l1 = (unsigned long *)kmap(page); + msr_bitmap_l1 = (unsigned long *)map->hva; if (nested_cpu_has_apic_reg_virt(vmcs12)) { /* * L0 need not intercept reads for MSRs between 0x800 and 0x8ff, it @@ -587,8 +587,7 @@ static inline bool nested_vmx_prepare_msr_bitmap(struct kvm_vcpu *vcpu, MSR_IA32_PRED_CMD, MSR_TYPE_W); - kunmap(page); - kvm_release_page_clean(page); + kvm_vcpu_unmap(vcpu, &to_vmx(vcpu)->nested.msr_bitmap_map, false); return true; } diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h index 9932895..6fb69d8 100644 --- a/arch/x86/kvm/vmx/vmx.h +++ b/arch/x86/kvm/vmx/vmx.h @@ -144,6 +144,9 @@ struct nested_vmx { struct page *apic_access_page; struct page *virtual_apic_page; struct page *pi_desc_page; + + struct kvm_host_map msr_bitmap_map; + struct pi_desc *pi_desc; bool pi_pending; u16 posted_intr_nv; -- 2.7.4