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Tsirkin" , Marcel Apfelbaum , Marcelo Tosatti , Tao Su Cc: Xiaoyao Li , Pankaj Gupta , Zide Chen , qemu-devel@nongnu.org, kvm@vger.kernel.org, Zhao Liu Subject: [PATCH v5 11/11] target/i386/kvm: Replace ARRAY_SIZE(msr_handlers) with KVM_MSR_FILTER_MAX_RANGES Date: Wed, 6 Nov 2024 11:07:28 +0800 Message-Id: <20241106030728.553238-12-zhao1.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241106030728.553238-1-zhao1.liu@intel.com> References: <20241106030728.553238-1-zhao1.liu@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=198.175.65.19; envelope-from=zhao1.liu@intel.com; helo=mgamail.intel.com X-Spam_score_int: -46 X-Spam_score: -4.7 X-Spam_bar: ---- X-Spam_report: (-4.7 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.34, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1730861472963116600 Content-Type: text/plain; charset="utf-8" kvm_install_msr_filters() uses KVM_MSR_FILTER_MAX_RANGES as the bound when traversing msr_handlers[], while other places still compute the size by ARRAY_SIZE(msr_handlers). In fact, msr_handlers[] is an array with the fixed size KVM_MSR_FILTER_MAX_RANGES, so there is no difference between the two ways. For the code consistency and to avoid additional computational overhead, use KVM_MSR_FILTER_MAX_RANGES instead of ARRAY_SIZE(msr_handlers). Suggested-by: Zide Chen Signed-off-by: Zhao Liu Reviewed-by: Zide Chen --- v4: new commit. --- target/i386/kvm/kvm.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index 013c0359acbe..501873475255 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -5885,7 +5885,7 @@ static int kvm_filter_msr(KVMState *s, uint32_t msr, = QEMURDMSRHandler *rdmsr, { int i, ret; =20 - for (i =3D 0; i < ARRAY_SIZE(msr_handlers); i++) { + for (i =3D 0; i < KVM_MSR_FILTER_MAX_RANGES; i++) { if (!msr_handlers[i].msr) { msr_handlers[i] =3D (KVMMSRHandlers) { .msr =3D msr, @@ -5911,7 +5911,7 @@ static int kvm_handle_rdmsr(X86CPU *cpu, struct kvm_r= un *run) int i; bool r; =20 - for (i =3D 0; i < ARRAY_SIZE(msr_handlers); i++) { + for (i =3D 0; i < KVM_MSR_FILTER_MAX_RANGES; i++) { KVMMSRHandlers *handler =3D &msr_handlers[i]; if (run->msr.index =3D=3D handler->msr) { if (handler->rdmsr) { @@ -5931,7 +5931,7 @@ static int kvm_handle_wrmsr(X86CPU *cpu, struct kvm_r= un *run) int i; bool r; =20 - for (i =3D 0; i < ARRAY_SIZE(msr_handlers); i++) { + for (i =3D 0; i < KVM_MSR_FILTER_MAX_RANGES; i++) { KVMMSRHandlers *handler =3D &msr_handlers[i]; if (run->msr.index =3D=3D handler->msr) { if (handler->wrmsr) { --=20 2.34.1