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20:6YuQZKVoe53458Sfp9iOFXS4C+84zMzwH2rh7VcyFVaUaobvG2Lv9rrp2h5tLbtEu7OyAwK7LPyWhnY86EmTgUJebhUGSncOrE4N2GyzHOc0L6iUYc8a7OVdJoHWIXvxITobUtPCVzDZOqdzAWe+U6tutblUT2oeCMxgfduDuecpCaE7WD7zmJGaBjHqV+SVO9ixSvRoMLmXeZ7zum6rpVVv4gW+XbN8OoRyZqK9rIEWet1EYY6tygTeOdeMDRbh X-MS-Office365-Filtering-Correlation-Id: 84a31d1c-b34c-4b83-0a3a-08d5cd931977 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Jun 2018 22:56:40.4384 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 84a31d1c-b34c-4b83-0a3a-08d5cd931977 X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW2PR12MB2473 X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 [fuzzy] X-Received-From: 104.47.38.88 Subject: [Qemu-devel] [PATCH v13 3/5] i386: Enable TOPOEXT feature on AMD EPYC CPU X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: geoff@hostfission.com, babu.moger@amd.com, kash@tripleback.net, qemu-devel@nongnu.org, kvm@vger.kernel.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Enable TOPOEXT feature on EPYC CPU. This is required to support hyperthreading on VM guests. Also extend xlevel to 0x8000001E. TOPOEXT feature is disabled for legacy machines. Signed-off-by: Babu Moger --- target/i386/cpu.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index d3411ed..4dd9a82 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -2574,6 +2574,7 @@ static X86CPUDefinition builtin_x86_defs[] = { .xlevel = 0x8000000A, .model_id = "AMD EPYC Processor", .cache_info = &epyc_cache_info, + .auto_topoext = 1, }, { .name = "EPYC-IBPB", @@ -2621,6 +2622,7 @@ static X86CPUDefinition builtin_x86_defs[] = { .xlevel = 0x8000000A, .model_id = "AMD EPYC Processor (with IBPB)", .cache_info = &epyc_cache_info, + .auto_topoext = 1, }, }; @@ -4672,6 +4674,11 @@ static void x86_cpu_expand_features(X86CPU *cpu, Error **errp) x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000000A); } + /* TOPOEXT feature requires 0x8000001E */ + if (env->features[FEAT_8000_0001_ECX] & CPUID_EXT3_TOPOEXT) { + x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000001E); + } + /* SEV requires CPUID[0x8000001F] */ if (sev_enabled()) { x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000001F);