target/i386: Add PDCM feature bit when when CPU's pmu property is enabled

[PATCH] target/i386: Add PDCM feature bit when when CPU's pmu property is enabled

Gal Hammer posted 1 patch 3 years, 9 months ago

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git fetch https://github.com/patchew-project/qemu tags/patchew/20200728064250.168368-1-ghammer@redhat.com

Maintainers: Paolo Bonzini <pbonzini@redhat.com>, Richard Henderson <rth@twiddle.net>, Eduardo Habkost <ehabkost@redhat.com>

target/i386/cpu.c | 2 ++
1 file changed, 2 insertions(+)

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[PATCH] target/i386: Add PDCM feature bit when when CPU's pmu property is enabled

Posted by Gal Hammer 3 years, 9 months ago

The PDCM feature bit is not enabled when adding the pmu property to a CPU
without this capability (e.g. -cpu qemu64,pmu).

Signed-off-by: Gal Hammer <ghammer@redhat.com>
---
 target/i386/cpu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 588f32e136..6e1c8b6019 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -5535,6 +5535,8 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
         }
         if (!cpu->enable_pmu) {
             *ecx &= ~CPUID_EXT_PDCM;
+        } else {
+            *ecx |= CPUID_EXT_PDCM;
         }
         break;
     case 2:
-- 
2.26.2