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Tue, 11 Mar 2025 16:29:19 +0000 (UTC) Received: from gondolin.redhat.com (unknown [10.67.24.185]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id EE87F180AF7C; Tue, 11 Mar 2025 16:29:03 +0000 (UTC) From: Cornelia Huck To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, kvmarm@lists.linux.dev, peter.maydell@linaro.org, richard.henderson@linaro.org, alex.bennee@linaro.org, maz@kernel.org, oliver.upton@linux.dev, sebott@redhat.com, shameerali.kolothum.thodi@huawei.com, armbru@redhat.com, berrange@redhat.com, abologna@redhat.com, jdenemar@redhat.com, agraf@csgraf.de Cc: shahuang@redhat.com, mark.rutland@arm.com, philmd@linaro.org, pbonzini@redhat.com, Cornelia Huck Subject: [PATCH v3 02/14] arm/kvm: add accessors for storing host features into idregs Date: Tue, 11 Mar 2025 17:28:12 +0100 Message-ID: <20250311162824.199721-3-cohuck@redhat.com> In-Reply-To: <20250311162824.199721-1-cohuck@redhat.com> References: <20250311162824.199721-1-cohuck@redhat.com> MIME-Version: 1.0 Content-type: text/plain X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 Received-SPF: pass client-ip=170.10.133.124; envelope-from=cohuck@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, T_SPF_TEMPERROR=0.01 autolearn=unavailable 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Signed-off-by: Cornelia Huck --- target/arm/cpu-sysregs.h | 4 ++++ target/arm/kvm.c | 22 ++++++++++++++++++++++ 2 files changed, 26 insertions(+) diff --git a/target/arm/cpu-sysregs.h b/target/arm/cpu-sysregs.h index b95320b5b595..68a7de737185 100644 --- a/target/arm/cpu-sysregs.h +++ b/target/arm/cpu-sysregs.h @@ -34,4 +34,8 @@ extern const uint32_t id_register_sysreg[NUM_ID_IDX]; int get_sysreg_idx(ARMSysRegs sysreg); +#ifdef CONFIG_KVM +uint64_t idregs_sysreg_to_kvm_reg(ARMSysRegs sysreg); +#endif + #endif /* ARM_CPU_SYSREGS_H */ diff --git a/target/arm/kvm.c b/target/arm/kvm.c index da30bdbb2349..a0551f8a5a23 100644 --- a/target/arm/kvm.c +++ b/target/arm/kvm.c @@ -246,6 +246,28 @@ static bool kvm_arm_pauth_supported(void) kvm_check_extension(kvm_state, KVM_CAP_ARM_PTRAUTH_GENERIC)); } + +uint64_t idregs_sysreg_to_kvm_reg(ARMSysRegs sysreg) +{ + return ARM64_SYS_REG((sysreg & CP_REG_ARM64_SYSREG_OP0_MASK) >> CP_REG_ARM64_SYSREG_OP0_SHIFT, + (sysreg & CP_REG_ARM64_SYSREG_OP1_MASK) >> CP_REG_ARM64_SYSREG_OP1_SHIFT, + (sysreg & CP_REG_ARM64_SYSREG_CRN_MASK) >> CP_REG_ARM64_SYSREG_CRN_SHIFT, + (sysreg & CP_REG_ARM64_SYSREG_CRM_MASK) >> CP_REG_ARM64_SYSREG_CRM_SHIFT, + (sysreg & CP_REG_ARM64_SYSREG_OP2_MASK) >> CP_REG_ARM64_SYSREG_OP2_SHIFT); +} + +/* read a sysreg value and store it in the idregs */ +static int get_host_cpu_reg(int fd, ARMHostCPUFeatures *ahcf, ARMIDRegisterIdx index) +{ + uint64_t *reg; + int ret; + + reg = &ahcf->isar.idregs[index]; + ret = read_sys_reg64(fd, reg, + idregs_sysreg_to_kvm_reg(id_register_sysreg[index])); + return ret; +} + static bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf) { /* Identify the feature bits corresponding to the host CPU, and