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Fri, 6 Jan 2023 18:57:08 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by BL02EPF00010208.mail.protection.outlook.com (10.167.241.199) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.5986.15 via Frontend Transport; Fri, 6 Jan 2023 18:57:08 +0000 Received: from bmoger-ubuntu.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.34; Fri, 6 Jan 2023 12:57:07 -0600 From: Babu Moger To: CC: , , , , , , , , , , Subject: [PATCH v2 1/5] target/i386: allow versioned CPUs to specify new cache_info Date: Fri, 6 Jan 2023 12:56:56 -0600 Message-ID: <20230106185700.28744-2-babu.moger@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230106185700.28744-1-babu.moger@amd.com> References: <20230106185700.28744-1-babu.moger@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF00010208:EE_|PH0PR12MB5497:EE_ X-MS-Office365-Filtering-Correlation-Id: 1f167f98-f90a-438d-53e2-08daf017cfef X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Jan 2023 18:57:08.9360 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1f167f98-f90a-438d-53e2-08daf017cfef X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL02EPF00010208.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR12MB5497 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Michael Roth New EPYC CPUs versions require small changes to their cache_info's. Because current QEMU x86 CPU definition does not support cache versions, we would have to declare a new CPU type for each such case. To avoid this duplication, the patch allows new cache_info pointers to be specified for a new CPU version. Co-developed-by: Wei Huang Signed-off-by: Wei Huang Signed-off-by: Michael Roth Signed-off-by: Babu Moger --- target/i386/cpu.c | 36 +++++++++++++++++++++++++++++++++--- 1 file changed, 33 insertions(+), 3 deletions(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 3410e5e470..ab1b49f08f 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -1596,6 +1596,7 @@ typedef struct X86CPUVersionDefinition { const char *alias; const char *note; PropValue *props; + const CPUCaches *const cache_info; } X86CPUVersionDefinition; /* Base definition for a CPU model */ @@ -5057,6 +5058,32 @@ static void x86_cpu_apply_version_props(X86CPU *cpu, X86CPUModel *model) assert(vdef->version == version); } +/* Apply properties for the CPU model version specified in model */ +static const CPUCaches *x86_cpu_get_version_cache_info(X86CPU *cpu, + X86CPUModel *model) +{ + const X86CPUVersionDefinition *vdef; + X86CPUVersion version = x86_cpu_model_resolve_version(model); + const CPUCaches *cache_info = model->cpudef->cache_info; + + if (version == CPU_VERSION_LEGACY) { + return cache_info; + } + + for (vdef = x86_cpu_def_get_versions(model->cpudef); vdef->version; vdef++) { + if (vdef->cache_info) { + cache_info = vdef->cache_info; + } + + if (vdef->version == version) { + break; + } + } + + assert(vdef->version == version); + return cache_info; +} + /* * Load data from X86CPUDefinition into a X86CPU object. * Only for builtin_x86_defs models initialized with x86_register_cpudef_types. @@ -5089,7 +5116,7 @@ static void x86_cpu_load_model(X86CPU *cpu, X86CPUModel *model) } /* legacy-cache defaults to 'off' if CPU model provides cache info */ - cpu->legacy_cache = !def->cache_info; + cpu->legacy_cache = !x86_cpu_get_version_cache_info(cpu, model); env->features[FEAT_1_ECX] |= CPUID_EXT_HYPERVISOR; @@ -6563,14 +6590,17 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp) /* Cache information initialization */ if (!cpu->legacy_cache) { - if (!xcc->model || !xcc->model->cpudef->cache_info) { + const CPUCaches *cache_info = + x86_cpu_get_version_cache_info(cpu, xcc->model); + + if (!xcc->model || !cache_info) { g_autofree char *name = x86_cpu_class_get_model_name(xcc); error_setg(errp, "CPU model '%s' doesn't support legacy-cache=off", name); return; } env->cache_info_cpuid2 = env->cache_info_cpuid4 = env->cache_info_amd = - *xcc->model->cpudef->cache_info; + *cache_info; } else { /* Build legacy cache information */ env->cache_info_cpuid2.l1d_cache = &legacy_l1d_cache;