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From: Babu Moger <babu.moger@amd.com>
To: pbonzini@redhat.com, rth@twiddle.net, ehabkost@redhat.com,
	rkrcmar@redhat.com
Cc: mtosatti@redhat.com, qemu-devel@nongnu.org, kvm@vger.kernel.org,
	Gary.Hook@amd.com, Thomas.Lendacky@amd.com, babu.moger@amd.com
Subject: [Qemu-devel] [PATCH v3 4/5] target/i386: Enable TOPOEXT feature on AMD EPYC CPU
Date: Mon,  5 Mar 2018 15:18:26 -0500	[thread overview]
Message-ID: <1520281107-5115-5-git-send-email-babu.moger@amd.com> (raw)
In-Reply-To: <1520281107-5115-1-git-send-email-babu.moger@amd.com>

Enable TOPOEXT feature on EPYC CPU. This is required to support
hyperthreading on VM guests. Also extend xlevel to 0x8000001E.

Signed-off-by: Babu Moger <babu.moger@amd.com>
---
 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 555ab83..88941d9 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1955,7 +1955,8 @@ 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 |
@@ -1970,7 +1971,7 @@ 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",
     },
     {
-- 
1.8.3.1

  parent reply	other threads:[~2018-03-05 20:18 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-05 20:18 [Qemu-devel] [PATCH v3 0/5] Enable TOPOEXT to support hyperthreading on AMD CPU Babu Moger
2018-03-05 20:18 ` [Qemu-devel] [PATCH v3 1/5] target/i386: Generalize some of the macro definitions Babu Moger
2018-03-05 20:18 ` [Qemu-devel] [PATCH v3 2/5] target/i386: Populate AMD Processor Cache Information Babu Moger
2018-03-05 20:18 ` [Qemu-devel] [PATCH v3 3/5] target/i386: Add support for CPUID_8000_001E for AMD Babu Moger
2018-03-05 20:18 ` Babu Moger [this message]
2018-03-05 20:18 ` [Qemu-devel] [PATCH v3 5/5] target/i386: Remove generic SMT thread check Babu Moger

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