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GET /api/1.1/patches/2237947/?format=api
{ "id": 2237947, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2237947/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260513163356.3033159-11-shaju.abraham@nutanix.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.1/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20260513163356.3033159-11-shaju.abraham@nutanix.com>", "date": "2026-05-13T16:33:53", "name": "[RFC,v1,10/13] target/arm: named_cpu_model: Register Arm64 properties for host model", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "c693e11ca43442a8f3a500a88becb35a1f554cd0", "submitter": { "id": 77003, "url": "http://patchwork.ozlabs.org/api/1.1/people/77003/?format=api", "name": "Shaju Abraham", "email": "shaju.abraham@nutanix.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260513163356.3033159-11-shaju.abraham@nutanix.com/mbox/", "series": [ { "id": 504187, "url": "http://patchwork.ozlabs.org/api/1.1/series/504187/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=504187", "date": "2026-05-13T16:33:48", "name": "named CPU models for ARM64 on KVM", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/504187/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2237947/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2237947/checks/", "tags": {}, "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=nutanix.com header.i=@nutanix.com header.a=rsa-sha256\n header.s=proofpoint20171006 header.b=p0G8URFX;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=nutanix.com header.i=@nutanix.com header.a=rsa-sha256\n header.s=selector1 header.b=PIdsxRkd;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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helo=mx0b-002c1b01.pphosted.com", "X-Spam_score_int": "-31", "X-Spam_score": "-3.2", "X-Spam_bar": "---", "X-Spam_report": "(-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.445,\n DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001,\n 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": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "Register all the defined Arm properties to the host model if CONFIG_KVM is\nenabled. Add property finder, getter/setter functions, and wire up the\nproperty registration in the CPU initialization path.\n\nCo-authored-by: Khushit Shah <khushit.shah@nutanix.com>\nSigned-off-by: Shaju Abraham <shaju.abraham@nutanix.com>\n---\n target/arm/arm-cpu-props.c | 216 +++++++++++++++++++++++++++++++++++++\n target/arm/arm-cpu-props.h | 2 +-\n target/arm/cpu64.c | 3 +-\n 3 files changed, 219 insertions(+), 2 deletions(-)", "diff": "diff --git a/target/arm/arm-cpu-props.c b/target/arm/arm-cpu-props.c\nindex f22fe7f08b..1a34428c00 100644\n--- a/target/arm/arm-cpu-props.c\n+++ b/target/arm/arm-cpu-props.c\n@@ -41,3 +41,219 @@ const ArmCpuPropDesc arm_cpu_props[] = {\n #include \"arm-cpu-props.inc.h\"\n { .name = NULL },\n };\n+\n+static const ArmCpuPropDesc *arm_find_prop(const char *name)\n+{\n+ const ArmCpuPropDesc *p;\n+ for (p = arm_cpu_props; p->name; p++) {\n+ if (g_str_equal(p->name, name)) {\n+ return p;\n+ }\n+ }\n+ return NULL;\n+}\n+\n+static void arm_single_field_get(ARMCPU *cpu, const ArmCpuPropDesc *p,\n+ Visitor *v, const char *name, Error **errp)\n+{\n+ uint64_t value;\n+ char *s;\n+ bool b;\n+\n+ arm_idreg_field_read(cpu, p->base_field, &value);\n+\n+ switch (p->type) {\n+ case ARM_PROP_STRING: {\n+ s = g_strdup(arm_arch_val_name(p->base_field, value));\n+\n+ if (!s) {\n+ error_setg(errp, \"Property '%s': unknown value %\" PRIu64,\n+ name, value);\n+ return;\n+ }\n+ visit_type_str(v, name, &s, errp);\n+ g_free(s);\n+ break;\n+ }\n+ case ARM_PROP_BOOLEAN: {\n+ b = value != 0;\n+ visit_type_bool(v, name, &b, errp);\n+ break;\n+ }\n+ case ARM_PROP_NUMERIC:\n+ visit_type_uint64(v, name, &value, errp);\n+ break;\n+ default:\n+ g_assert_not_reached();\n+ }\n+}\n+\n+static void arm_fractional_get(ARMCPU *cpu, const ArmCpuPropDesc *p,\n+ Visitor *v, const char *name, Error **errp)\n+{\n+ uint64_t base_val, frac_val;\n+ const ArmFracVal *val;\n+ char *s;\n+\n+ arm_idreg_field_read(cpu, p->base_field, &base_val);\n+ arm_idreg_field_read(cpu, p->frac_field, &frac_val);\n+\n+ for (val = p->vals; val->name; val++) {\n+ if (val->base_val == base_val && val->frac_val == frac_val) {\n+ s = g_strdup(val->name);\n+ visit_type_str(v, name, &s, errp);\n+ g_free(s);\n+ return;\n+ }\n+ }\n+\n+ error_setg(errp,\n+ \"Property '%s': unknown fractional value %\" PRIu64\n+ \".%\" PRIu64, name, base_val, frac_val);\n+}\n+\n+static void arm_cpu_prop_get(Object *obj, Visitor *v, const char *name,\n+ void *opaque, Error **errp)\n+{\n+ ARMCPU *cpu = ARM_CPU(obj);\n+ const ArmCpuPropDesc *p = arm_find_prop(name);\n+\n+ if (!p) {\n+ error_setg(errp, \"Property %s not found\", name);\n+ return;\n+ }\n+\n+ switch (p->type) {\n+ case ARM_PROP_STRING:\n+ case ARM_PROP_BOOLEAN:\n+ case ARM_PROP_NUMERIC:\n+ arm_single_field_get(cpu, p, v, name, errp);\n+ break;\n+ case ARM_PROP_FRACTIONAL:\n+ arm_fractional_get(cpu, p, v, name, errp);\n+ break;\n+ }\n+}\n+\n+static void arm_single_field_set(ARMCPU *cpu, const ArmCpuPropDesc *p,\n+ Visitor *v, const char *name, Error **errp)\n+{\n+ uint64_t value;\n+ char *str = NULL;\n+ bool b;\n+\n+ switch (p->type) {\n+ case ARM_PROP_STRING: {\n+\n+ if (!visit_type_str(v, name, &str, errp)) {\n+ return;\n+ }\n+ if (!arm_arch_val_from_name(p->base_field, str, &value)) {\n+ error_setg(errp, \"Property '%s': invalid value '%s'\", name, str);\n+ g_free(str);\n+ return;\n+ }\n+ g_free(str);\n+ break;\n+ }\n+ case ARM_PROP_BOOLEAN: {\n+\n+ if (!visit_type_bool(v, name, &b, errp)) {\n+ return;\n+ }\n+ value = b ? 1 : 0;\n+ break;\n+ }\n+ case ARM_PROP_NUMERIC:\n+ if (!visit_type_uint64(v, name, &value, errp)) {\n+ return;\n+ }\n+ break;\n+ default:\n+ g_assert_not_reached();\n+ }\n+\n+ if (!arm_idreg_field_write(cpu, p->base_field, value, errp)) {\n+ error_prepend(errp, \"Property '%s': \", name);\n+ }\n+}\n+\n+static void arm_fractional_set(ARMCPU *cpu, const ArmCpuPropDesc *p,\n+ Visitor *v, const char *name, Error **errp)\n+{\n+ char *str = NULL;\n+ const ArmFracVal *val;\n+\n+ if (!visit_type_str(v, name, &str, errp)) {\n+ return;\n+ }\n+\n+ for (val = p->vals; val->name; val++) {\n+ if (g_str_equal(val->name, str)) {\n+ if (!arm_idreg_field_write(cpu, p->base_field,\n+ val->base_val, errp)) {\n+ error_prepend(errp, \"Property '%s': \", name);\n+ g_free(str);\n+ return;\n+ }\n+ if (!arm_idreg_field_write(cpu, p->frac_field,\n+ val->frac_val, errp)) {\n+ error_prepend(errp, \"Property '%s': \", name);\n+ }\n+ g_free(str);\n+ return;\n+ }\n+ }\n+\n+ error_setg(errp, \"Property '%s': invalid fractional value '%s'\",\n+ name, str);\n+ g_free(str);\n+}\n+\n+static void arm_cpu_prop_set(Object *obj, Visitor *v, const char *name,\n+ void *opaque, Error **errp)\n+{\n+ ARMCPU *cpu = ARM_CPU(obj);\n+ const ArmCpuPropDesc *p = arm_find_prop(name);\n+\n+ if (!p) {\n+ error_setg(errp, \"Property %s not found\", name);\n+ return;\n+ }\n+\n+ switch (p->type) {\n+ case ARM_PROP_STRING:\n+ case ARM_PROP_BOOLEAN:\n+ case ARM_PROP_NUMERIC:\n+ arm_single_field_set(cpu, p, v, name, errp);\n+ break;\n+ case ARM_PROP_FRACTIONAL:\n+ arm_fractional_set(cpu, p, v, name, errp);\n+ break;\n+ }\n+}\n+\n+void arm_add_cpu_props(Object *obj)\n+{\n+ const char *type;\n+ const ArmCpuPropDesc *p;\n+\n+ for (p = arm_cpu_props; p->name; p++) {\n+ switch (p->type) {\n+ case ARM_PROP_STRING:\n+ case ARM_PROP_FRACTIONAL:\n+ type = \"string\";\n+ break;\n+ case ARM_PROP_BOOLEAN:\n+ type = \"bool\";\n+ break;\n+ case ARM_PROP_NUMERIC:\n+ type = \"number\";\n+ break;\n+ default:\n+ g_assert_not_reached();\n+ }\n+ object_property_add(obj, p->name, type,\n+ arm_cpu_prop_get, arm_cpu_prop_set, NULL, NULL);\n+ }\n+}\ndiff --git a/target/arm/arm-cpu-props.h b/target/arm/arm-cpu-props.h\nindex 1dc3786ea9..48f9c46ccb 100644\n--- a/target/arm/arm-cpu-props.h\n+++ b/target/arm/arm-cpu-props.h\n@@ -32,5 +32,5 @@ typedef struct ArmCpuPropDesc {\n ArmFieldIdx frac_field;\n const ArmFracVal *vals;\n } ArmCpuPropDesc;\n-\n+void arm_add_cpu_props(Object *obj);\n #endif\ndiff --git a/target/arm/cpu64.c b/target/arm/cpu64.c\nindex a93ad2da5a..0300f8677f 100644\n--- a/target/arm/cpu64.c\n+++ b/target/arm/cpu64.c\n@@ -37,7 +37,7 @@\n #include \"hw/core/qdev-properties.h\"\n #include \"internals.h\"\n #include \"cpu-features.h\"\n-\n+#include \"arm-cpu-props.h\"\n /* convert between <register>_IDX and SYS_<register> */\n #define DEF(NAME, OP0, OP1, CRN, CRM, OP2) \\\n [NAME##_IDX] = SYS_##NAME,\n@@ -863,6 +863,7 @@ static void aarch64_host_initfn(Object *obj)\n kvm_arm_set_cpreg_mig_tolerances(cpu);\n kvm_arm_set_cpu_features_from_host(cpu);\n aarch64_add_sve_properties(obj);\n+ arm_add_cpu_props(obj);\n #elif defined(CONFIG_HVF)\n hvf_arm_set_cpu_features_from_host(cpu);\n #elif defined(CONFIG_WHPX)\n", "prefixes": [ "RFC", "v1", "10/13" ] }