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[Qemu-devel] [PATCH v13 3/5] i386: Enable TOPOEXT feature on AMD EPYC CP
From: |
Babu Moger |
Subject: |
[Qemu-devel] [PATCH v13 3/5] i386: Enable TOPOEXT feature on AMD EPYC CPU |
Date: |
Fri, 8 Jun 2018 18:56:19 -0400 |
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 <address@hidden>
---
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);
--
1.8.3.1
- [Qemu-devel] [PATCH v13 0/5] i386: Enable TOPOEXT to support hyperthreading on AMD CPU, Babu Moger, 2018/06/08
- [Qemu-devel] [PATCH v13 2/5] i386: Introduce auto_topoext bit to manage topoext, Babu Moger, 2018/06/08
- Re: [Qemu-devel] [PATCH v13 2/5] i386: Introduce auto_topoext bit to manage topoext, Moger, Babu, 2018/06/11
- Re: [Qemu-devel] [PATCH v13 2/5] i386: Introduce auto_topoext bit to manage topoext, Eduardo Habkost, 2018/06/11
- Re: [Qemu-devel] [PATCH v13 2/5] i386: Introduce auto_topoext bit to manage topoext, Moger, Babu, 2018/06/11
- Re: [Qemu-devel] [PATCH v13 2/5] i386: Introduce auto_topoext bit to manage topoext, Eduardo Habkost, 2018/06/11
- Re: [Qemu-devel] [PATCH v13 2/5] i386: Introduce auto_topoext bit to manage topoext, Moger, Babu, 2018/06/11
[Qemu-devel] [PATCH v13 1/5] i386: Add support for CPUID_8000_001E for AMD, Babu Moger, 2018/06/08
[Qemu-devel] [PATCH v13 3/5] i386: Enable TOPOEXT feature on AMD EPYC CPU,
Babu Moger <=
- Re: [Qemu-devel] [PATCH v13 3/5] i386: Enable TOPOEXT feature on AMD EPYC CPU, Eduardo Habkost, 2018/06/11
- Re: [Qemu-devel] [PATCH v13 3/5] i386: Enable TOPOEXT feature on AMD EPYC CPU, Moger, Babu, 2018/06/11
- Re: [Qemu-devel] [PATCH v13 3/5] i386: Enable TOPOEXT feature on AMD EPYC CPU, Eduardo Habkost, 2018/06/11
- Re: [Qemu-devel] [PATCH v13 3/5] i386: Enable TOPOEXT feature on AMD EPYC CPU, Moger, Babu, 2018/06/12
- Re: [Qemu-devel] [PATCH v13 3/5] i386: Enable TOPOEXT feature on AMD EPYC CPU, Eduardo Habkost, 2018/06/12
- Re: [Qemu-devel] [PATCH v13 3/5] i386: Enable TOPOEXT feature on AMD EPYC CPU, Moger, Babu, 2018/06/12
- Re: [Qemu-devel] [PATCH v13 3/5] i386: Enable TOPOEXT feature on AMD EPYC CPU, Eduardo Habkost, 2018/06/12
- Re: [Qemu-devel] [PATCH v13 3/5] i386: Enable TOPOEXT feature on AMD EPYC CPU, Babu Moger, 2018/06/12
- Re: [Qemu-devel] [PATCH v13 3/5] i386: Enable TOPOEXT feature on AMD EPYC CPU, Moger, Babu, 2018/06/13
- Re: [Qemu-devel] [PATCH v13 3/5] i386: Enable TOPOEXT feature on AMD EPYC CPU, Eduardo Habkost, 2018/06/13