diff mbox series

[3/5] target/i386: Add support for CPUID_8000_001E for AMD

Message ID 20180126213944.7594-4-babu.moger@amd.com
State New
Headers show
Series None | expand

Commit Message

Babu Moger Jan. 26, 2018, 9:39 p.m. UTC 
From: Stanislav Lanci <pixo@polepetko.eu>

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. These are supported via CPUID_8000_001E extended
functions.

Signed-off-by: Stanislav Lanci <pixo@polepetko.eu>
Signed-off-by: Babu Moger <babu.moger@amd.com>
---
 target/i386/cpu.c | 8 ++++++++
 1 file changed, 8 insertions(+)
diff mbox series

Patch

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 31ee746dac..52591a1486 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -3219,6 +3219,14 @@  void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
             *edx = 0;
         }
         break;
+    case 0x8000001E:
+        if (env->features[FEAT_8000_0001_ECX] & CPUID_EXT3_TOPOEXT) {
+            *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;