[PATCH 1/2] i386/cpu.c: Adjust minimum xlevel to 0x8000_001E when TOPOEXT is enabled

["Doru Blânzeanu" <dblanzeanu@linux.microsoft.com>]

This ensures the guests can discover the AMD cache and processor topology leaves
when TOPOEXT feature is enabled.

Signed-off-by: Doru Blânzeanu <dblanzeanu@linux.microsoft.com>
---
 target/i386/cpu.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 74eebeabd7..f1d8a35766 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -9879,6 +9879,11 @@ void x86_cpu_expand_features(X86CPU *cpu, Error **errp)
         x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000000A);
     }
 
+    /* TOPOEXT requires CPUID[0x8000001D] and CPUID[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);
-- 
2.53.0