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a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1744648910; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=tZhEbAvW+nE/L3dL1QKuAVHmPprHwZitzXkNAkqvyqU=; b=RRjR6+teZchivdLyOYfLwauF3jCQLHojwIA6pcN40yL5b8aPMOt5G2MFe3uYhiSOFBFpWB 1kImkaTt7HpCC9YJ7pSi0a7qwqT28mckO3v6IdxeIntJICztA/E9o0VSyBiV59fFQd38OE mQO9xxMGuP/a6dGz98iftmlYNn8P0dM= X-MC-Unique: cRkk4Q_GMcmm54CBPn5psw-1 X-Mimecast-MFC-AGG-ID: cRkk4Q_GMcmm54CBPn5psw_1744648901 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 Cc: agraf@csgraf.de, shahuang@redhat.com, mark.rutland@arm.com, philmd@linaro.org, pbonzini@redhat.com, Cornelia Huck Subject: [PATCH v3 09/10] arm-qmp-cmds: introspection for ID register props Date: Mon, 14 Apr 2025 18:38:48 +0200 Message-ID: <20250414163849.321857-10-cohuck@redhat.com> In-Reply-To: <20250414163849.321857-1-cohuck@redhat.com> References: <20250414163849.321857-1-cohuck@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" Implement the capability to query available ID register values by adding SYSREG_* options and values to the cpu model expansion for the host model, if available. Excerpt: (QEMU) query-cpu-model-expansion type=3Dfull model=3D{"name":"host"} {"return": {"model": {"name": "host", "props": {"SYSREG_ID_AA64PFR0_EL1_EL3": 1224979098931106066, "SYSREG_ID_AA64ISAR2_EL1_CLRBHB": 0, ../.. So this allows the upper stack to detect available writable ID regs and the "host passthrough model" values. [CH: moved SYSREG_* values to host model] Signed-off-by: Eric Auger Signed-off-by: Cornelia Huck --- TODO: Add the moment there is no way to test changing a given ID reg field value. ie: (QEMU) query-cpu-model-expansion type=3Dfull model=3D{"name":"host", "prop"= :{"SYSREG_ID_AA64ISAR0_EL1_DP":0x13}} --- target/arm/arm-qmp-cmds.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/target/arm/arm-qmp-cmds.c b/target/arm/arm-qmp-cmds.c index 883c0a0e8cce..5f48c7d835e1 100644 --- a/target/arm/arm-qmp-cmds.c +++ b/target/arm/arm-qmp-cmds.c @@ -21,6 +21,7 @@ */ =20 #include "qemu/osdep.h" +#include "qemu/error-report.h" #include "hw/boards.h" #include "kvm_arm.h" #include "qapi/error.h" @@ -209,6 +210,24 @@ CpuModelExpansionInfo *qmp_query_cpu_model_expansion(C= puModelExpansionType type, } } =20 + /* If writable ID regs are supported, add them as well */ + if (ARM_CPU(obj)->writable_id_regs =3D=3D WRITABLE_ID_REGS_AVAIL) { + ObjectProperty *prop; + ObjectPropertyIterator iter; + + object_property_iter_init(&iter, obj); + + while ((prop =3D object_property_iter_next(&iter))) { + QObject *value; + + if (!g_str_has_prefix(prop->name, "SYSREG_")) { + continue; + } + value =3D object_property_get_qobject(obj, prop->name, &error_= abort); + qdict_put_obj(qdict_out, prop->name, value); + } + } + if (!qdict_size(qdict_out)) { qobject_unref(qdict_out); } else { --=20 2.49.0