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Fri, 01 Aug 2025 00:47:44 -0700 (PDT) From: Shameer Kolothum To: qemu-arm@nongnu.org, qemu-devel@nongnu.org Cc: eric.auger@redhat.com, peter.maydell@linaro.org, cohuck@redhat.com, sebott@redhat.com, berrange@redhat.com, maz@kernel.org, oliver.upton@linux.dev, armbru@redhat.com, linuxarm@huawei.com, wangzhou1@hisilicon.com, jiangkunkun@huawei.com, jonathan.cameron@huawei.com, salil.mehta@huawei.com, yangjinqian1@huawei.com, shameerkolothum@gmail.com, shameerali.kolothum.thodi@huawei.com Subject: [RFC PATCH RESEND 2/4] target/arm/kvm: Add QAPI struct ArmTargetImplCPU Date: Fri, 1 Aug 2025 08:47:28 +0100 Message-ID: <20250801074730.28329-3-shameerkolothum@gmail.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250801074730.28329-1-shameerkolothum@gmail.com> References: <20250801074730.28329-1-shameerkolothum@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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=2a00:1450:4864:20::42c; envelope-from=shameerkolothum@gmail.com; helo=mail-wr1-x42c.google.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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Fri, 01 Aug 2025 09:35:51 -0400 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 @gmail.com) X-ZM-MESSAGEID: 1754055531334116600 From: Shameer Kolothum Introduce a QAPI=E2=80=90defined struct (and its array) for target implemen= tation CPUs. This enables specifying target implementation=C2=A0CPU parameters via -machine, for example: -M virt, \ =C2=A0 impl-cpu.0.midr=3D1,impl-cpu.0.revidr=3D1,impl-cpu.0.aidr=3D1, \ =C2=A0 impl-cpu.1.midr=3D2,impl-cpu.1.revidr=3D2,impl-cpu.1.aidr=3D0 Subsequent patch will make use of this by using object_property_add(), allowing users to configure each target CPU=E2=80=99s midr, revidr, and aidr fields directly from the command line. While at it, also provide=C2=A0a helper function to set the target=C2=A0CPU= s. Signed-off-by: Shameer Kolothum --- qapi/machine.json | 34 ++++++++++++++++++++++++++++++++++ target/arm/kvm.c | 16 ++++++++++++++++ target/arm/kvm_arm.h | 8 ++++++++ 3 files changed, 58 insertions(+) diff --git a/qapi/machine.json b/qapi/machine.json index a6b8795b09..d6e0e3b2e3 100644 --- a/qapi/machine.json +++ b/qapi/machine.json @@ -1898,3 +1898,37 @@ { 'command': 'x-query-interrupt-controllers', 'returns': 'HumanReadableText', 'features': [ 'unstable' ]} + +## +# @ArmTargetImplCPU: +# +# Info for a single target implementation CPU. +# +# @midr: MIDR value +# @revidr: REVIDR value +# @aidr: AIDR value +# +# Since: 10.2 +## +{ 'struct': 'ArmTargetImplCPU', + 'data': { + 'midr': 'uint64', + 'revidr': 'uint64', + 'aidr': 'uint64' + } +} + +## +# @ArmTargetImplCPUs: +# +# List of target implementation CPUs. +# +# @target-cpus: List of ArmTargetImplCPU entries. +# +# Since: 10.2 +## +{ 'struct': 'ArmTargetImplCPUs', + 'data': { + 'target-cpus': ['ArmTargetImplCPU'] + } +} diff --git a/target/arm/kvm.c b/target/arm/kvm.c index eb04640b50..8f325c4ca4 100644 --- a/target/arm/kvm.c +++ b/target/arm/kvm.c @@ -66,6 +66,9 @@ typedef struct ARMHostCPUFeatures { =20 static ARMHostCPUFeatures arm_host_cpu_features; =20 +static uint64_t target_impl_cpus_num; +static ArmTargetImplCPU *target_impl_cpus; + /** * kvm_arm_vcpu_init: * @cpu: ARMCPU @@ -2816,3 +2819,16 @@ void kvm_arm_enable_mte(Object *cpuobj, Error **errp) cpu->kvm_mte =3D true; } } + +bool kvm_arm_set_target_impl_cpus(uint64_t num, ArmTargetImplCPU *cpus) +{ + + if (target_impl_cpus_num) { + return false; + } + + target_impl_cpus_num =3D num; + target_impl_cpus =3D cpus; + + return true; +} diff --git a/target/arm/kvm_arm.h b/target/arm/kvm_arm.h index 3cd6447901..8754302333 100644 --- a/target/arm/kvm_arm.h +++ b/target/arm/kvm_arm.h @@ -244,6 +244,8 @@ void kvm_arm_enable_mte(Object *cpuobj, Error **errp); =20 int kvm_arm_get_writable_id_regs(ARMCPU *cpu, IdRegMap *idregmap); =20 +bool kvm_arm_set_target_impl_cpus(uint64_t num, ArmTargetImplCPU *cpus); + #else =20 /* @@ -280,6 +282,12 @@ static inline int kvm_arm_get_writable_id_regs(ARMCPU = *cpu, IdRegMap *idregmap) return -ENOSYS; } =20 +static inline +bool kvm_arm_set_target_impl_cpus(uint64_t num, ArmTargetImplCPU *cpus) +{ + return false; +} + /* * These functions should never actually be called without KVM support. */ --=20 2.34.1