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[Qemu-devel] [PATCH v4 3/5] target/i386: Add support for CPUID_8000_001E
From: |
Babu Moger |
Subject: |
[Qemu-devel] [PATCH v4 3/5] target/i386: Add support for CPUID_8000_001E for AMD |
Date: |
Mon, 12 Mar 2018 17:00:47 -0400 |
From: Stanislav Lanci <address@hidden>
Populate threads/core_id/apic_ids/socket_id when CPUID_EXT3_TOPOEXT
feature is supported. This is required to support hyperthreading feature
on AMD CPUs. This is supported via CPUID_8000_001E extended functions.
Signed-off-by: Stanislav Lanci <address@hidden>
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 5fdbedd..ba63d0c 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -3655,6 +3655,13 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index,
uint32_t count,
break;
}
break;
+ case 0x8000001E:
+ assert(cpu->core_id <= 255);
+ *eax = cpu->apic_id;
+ *ebx = (cs->nr_threads - 1) << 8 | cpu->core_id;
+ *ecx = cpu->socket_id;
+ *edx = 0;
+ break;
case 0xC0000000:
*eax = env->cpuid_xlevel2;
*ebx = 0;
--
1.8.3.1
- [Qemu-devel] [PATCH v4 0/5] Enable TOPOEXT to support hyperthreading on AMD CPU, Babu Moger, 2018/03/12
- [Qemu-devel] [PATCH v4 1/5] target/i386: Generalize some of the macro definitions, Babu Moger, 2018/03/12
- [Qemu-devel] [PATCH v4 2/5] target/i386: Populate AMD Processor Cache Information, Babu Moger, 2018/03/12
- [Qemu-devel] [PATCH v4 4/5] target/i386: Enable TOPOEXT feature on AMD EPYC CPU, Babu Moger, 2018/03/12
- [Qemu-devel] [PATCH v4 3/5] target/i386: Add support for CPUID_8000_001E for AMD,
Babu Moger <=
- [Qemu-devel] [PATCH v4 5/5] target/i386: Remove generic SMT thread check, Babu Moger, 2018/03/12
- Re: [Qemu-devel] [PATCH v4 0/5] Enable TOPOEXT to support hyperthreading on AMD CPU, Kash Pande, 2018/03/13