Message ID | 20240726235234.228822-23-seanjc@google.com |
---|---|
State | New |
Headers | show
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Fri, 26 Jul 2024 16:53:22 -0700 (PDT) Date: Fri, 26 Jul 2024 16:51:31 -0700 In-Reply-To: <20240726235234.228822-1-seanjc@google.com> Mime-Version: 1.0 References: <20240726235234.228822-1-seanjc@google.com> X-Mailer: git-send-email 2.46.0.rc1.232.g9752f9e123-goog Message-ID: <20240726235234.228822-23-seanjc@google.com> Subject: [PATCH v12 22/84] KVM: nVMX: Drop pointless msr_bitmap_map field from struct nested_vmx From: Sean Christopherson <seanjc@google.com> To: Paolo Bonzini <pbonzini@redhat.com>, Marc Zyngier <maz@kernel.org>, Oliver Upton <oliver.upton@linux.dev>, Tianrui Zhao <zhaotianrui@loongson.cn>, Bibo Mao <maobibo@loongson.cn>, Huacai Chen <chenhuacai@kernel.org>, Michael Ellerman <mpe@ellerman.id.au>, Anup Patel <anup@brainfault.org>, Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu>, Christian Borntraeger <borntraeger@linux.ibm.com>, Janosch Frank <frankja@linux.ibm.com>, Claudio Imbrenda <imbrenda@linux.ibm.com>, Sean Christopherson <seanjc@google.com> Cc: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, David Matlack <dmatlack@google.com>, David Stevens <stevensd@chromium.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240726_165324_021421_F66CD2A9 X-CRM114-Status: GOOD ( 12.25 ) X-Spam-Score: -9.5 (---------) X-Spam-Report: Spam detection software, running on the system "bombadil.infradead.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Remove vcpu_vmx.msr_bitmap_map and instead use an on-stack structure in the one function that uses the map, nested_vmx_prepare_msr_bitmap(). Signed-off-by: Sean Christopherson <seanjc@google.com> --- arch/x86/kvm/vmx/nested.c | 8 ++++---- arch/x86/kvm/vmx/vmx.h | 2 -- 2 files changed, 4 insertions(+), 6 deletions(-) Content analysis details: (-9.5 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:449 listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -7.5 USER_IN_DEF_DKIM_WL From: address is in the default DKIM welcome-list 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] -0.0 DKIMWL_WL_MED DKIMwl.org - Medium trust sender X-BeenThere: kvm-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: <kvm-riscv.lists.infradead.org> List-Unsubscribe: <http://lists.infradead.org/mailman/options/kvm-riscv>, <mailto:kvm-riscv-request@lists.infradead.org?subject=unsubscribe> List-Archive: <http://lists.infradead.org/pipermail/kvm-riscv/> List-Post: <mailto:kvm-riscv@lists.infradead.org> List-Help: <mailto:kvm-riscv-request@lists.infradead.org?subject=help> List-Subscribe: <http://lists.infradead.org/mailman/listinfo/kvm-riscv>, <mailto:kvm-riscv-request@lists.infradead.org?subject=subscribe> Reply-To: Sean Christopherson <seanjc@google.com> Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kvm-riscv" <kvm-riscv-bounces@lists.infradead.org> Errors-To: kvm-riscv-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org |
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KVM: Stop grabbing references to PFNMAP'd pages
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expand
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diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index a34b49ea64b5..372d005e09e7 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -621,7 +621,7 @@ static inline bool nested_vmx_prepare_msr_bitmap(struct kvm_vcpu *vcpu, int msr; unsigned long *msr_bitmap_l1; unsigned long *msr_bitmap_l0 = vmx->nested.vmcs02.msr_bitmap; - struct kvm_host_map *map = &vmx->nested.msr_bitmap_map; + struct kvm_host_map msr_bitmap_map; /* Nothing to do if the MSR bitmap is not in use. */ if (!cpu_has_vmx_msr_bitmap() || @@ -644,10 +644,10 @@ static inline bool nested_vmx_prepare_msr_bitmap(struct kvm_vcpu *vcpu, return true; } - if (kvm_vcpu_map(vcpu, gpa_to_gfn(vmcs12->msr_bitmap), map)) + if (kvm_vcpu_map(vcpu, gpa_to_gfn(vmcs12->msr_bitmap), &msr_bitmap_map)) return false; - msr_bitmap_l1 = (unsigned long *)map->hva; + msr_bitmap_l1 = (unsigned long *)msr_bitmap_map.hva; /* * To keep the control flow simple, pay eight 8-byte writes (sixteen @@ -711,7 +711,7 @@ static inline bool nested_vmx_prepare_msr_bitmap(struct kvm_vcpu *vcpu, nested_vmx_set_intercept_for_msr(vmx, msr_bitmap_l1, msr_bitmap_l0, MSR_IA32_FLUSH_CMD, MSR_TYPE_W); - kvm_vcpu_unmap(vcpu, &vmx->nested.msr_bitmap_map, false); + kvm_vcpu_unmap(vcpu, &msr_bitmap_map, false); vmx->nested.force_msr_bitmap_recalc = false; diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h index 42498fa63abb..889c6c42ee27 100644 --- a/arch/x86/kvm/vmx/vmx.h +++ b/arch/x86/kvm/vmx/vmx.h @@ -204,8 +204,6 @@ struct nested_vmx { struct kvm_host_map virtual_apic_map; struct kvm_host_map pi_desc_map; - struct kvm_host_map msr_bitmap_map; - struct pi_desc *pi_desc; bool pi_pending; u16 posted_intr_nv;
Remove vcpu_vmx.msr_bitmap_map and instead use an on-stack structure in the one function that uses the map, nested_vmx_prepare_msr_bitmap(). Signed-off-by: Sean Christopherson <seanjc@google.com> --- arch/x86/kvm/vmx/nested.c | 8 ++++---- arch/x86/kvm/vmx/vmx.h | 2 -- 2 files changed, 4 insertions(+), 6 deletions(-)