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From: Ani Sinha <ani.sinha@nutanix.com>
To: pbonzini@redhat.com, rth@twiddle.net, ehabkost@redhat.com
Cc: ani.sinha@nutanix.com, qemu-devel@nongnu.org
Subject: [PATCH] i386: pass CLZERO to guests with EPYC CPU model on AMD ZEN platform
Date: Wed, 18 Dec 2019 01:05:33 -0800	[thread overview]
Message-ID: <1576659933-37123-1-git-send-email-ani.sinha@nutanix.com> (raw)

CLZERO CPUID should be passed on to the guests that use EPYC or EPYC-IBPB CPU
model when the AMD ZEN based host supports it. This change makes it recognize
this CPUID for guests which use EPYC or EPYC-IBPB CPU model.

Signed-off-by: Ani Sinha <ani.sinha@nutanix.com>
---
 target/i386/cpu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 69f518a..55f0691 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -3813,6 +3813,8 @@ static X86CPUDefinition builtin_x86_defs[] = {
             CPUID_EXT3_MISALIGNSSE | CPUID_EXT3_SSE4A | CPUID_EXT3_ABM |
             CPUID_EXT3_CR8LEG | CPUID_EXT3_SVM | CPUID_EXT3_LAHF_LM |
             CPUID_EXT3_TOPOEXT,
+        .features[FEAT_8000_0008_EBX] =
+            CPUID_8000_0008_EBX_CLZERO,
         .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 |
-- 
1.9.4



             reply	other threads:[~2019-12-18  9:08 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-18  9:05 Ani Sinha [this message]
2019-12-18 11:53 ` [PATCH] i386: pass CLZERO to guests with EPYC CPU model on AMD ZEN platform Paolo Bonzini
2019-12-18 15:11   ` Eduardo Habkost
2020-01-20 10:56     ` Ani Sinha
2020-02-05 22:37       ` Eduardo Habkost
2020-02-06  0:00         ` Moger, Babu
2020-02-06  5:46           ` Ani Sinha
2020-02-06  5:53             ` Ani Sinha
2020-02-06 15:30               ` Babu Moger
2020-02-06 16:03                 ` Eduardo Habkost
2020-02-06 15:52           ` Eduardo Habkost
2020-02-06 15:55             ` Babu Moger
2019-12-22  7:32   ` Ani Sinha
2019-12-22  8:15     ` Paolo Bonzini
2019-12-23  8:14       ` Ani Sinha
2019-12-23  8:50         ` Ani Sinha
     [not found] <yes>
2019-12-04  9:36 ` Ani Sinha
2019-12-16  9:31   ` Ani Sinha

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