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Fri, 26 Jan 2018 21:40:01 +0000 From: Babu Moger To: pbonzini@redhat.com, rth@twiddle.net, ehabkost@redhat.com, pixo@polepetko.eu Cc: mtosatti@redhat.com, babu.moger@amd.com, qemu-devel@nongnu.org, kvm@vger.kernel.org Subject: [PATCH 4/5] target/i386: Enable TOPOEXT feature on AMD EPYC CPU Date: Fri, 26 Jan 2018 16:39:43 -0500 Message-Id: <20180126213944.7594-5-babu.moger@amd.com> X-Mailer: git-send-email 2.16.0 In-Reply-To: <20180126213944.7594-1-babu.moger@amd.com> References: <20180126213944.7594-1-babu.moger@amd.com> MIME-Version: 1.0 X-Originating-IP: [165.204.77.1] X-ClientProxiedBy: CY4PR04CA0064.namprd04.prod.outlook.com (10.171.243.157) To DM5PR12MB1769.namprd12.prod.outlook.com (10.175.89.150) X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: 295da33b-b7fb-4457-4b6b-08d565055aef X-Microsoft-Antispam: UriScan:; BCL:0; PCL:0; RULEID:(7020095)(4652020)(4534165)(4627221)(201703031133081)(201702281549075)(48565401081)(5600026)(4604075)(2017052603307)(7153060)(7193020); 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This is required to support hyperthreading on VM guests. These are supported via CPUID_8000_001E extended functions. Signed-off-by: Babu Moger --- target/i386/cpu.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 52591a1486..956ed112db 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -1557,7 +1557,8 @@ static X86CPUDefinition builtin_x86_defs[] = { .features[FEAT_8000_0001_ECX] = CPUID_EXT3_OSVW | CPUID_EXT3_3DNOWPREFETCH | CPUID_EXT3_MISALIGNSSE | CPUID_EXT3_SSE4A | CPUID_EXT3_ABM | - CPUID_EXT3_CR8LEG | CPUID_EXT3_SVM | CPUID_EXT3_LAHF_LM, + CPUID_EXT3_CR8LEG | CPUID_EXT3_SVM | CPUID_EXT3_LAHF_LM | + CPUID_EXT3_TOPOEXT, .features[FEAT_7_0_EBX] = CPUID_7_0_EBX_FSGSBASE | CPUID_7_0_EBX_BMI1 | CPUID_7_0_EBX_AVX2 | CPUID_7_0_EBX_SMEP | CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_RDSEED | @@ -1572,7 +1573,7 @@ static X86CPUDefinition builtin_x86_defs[] = { CPUID_XSAVE_XGETBV1, .features[FEAT_6_EAX] = CPUID_6_EAX_ARAT, - .xlevel = 0x8000000A, + .xlevel = 0x8000001E, .model_id = "AMD EPYC Processor", }, };