[PATCH] target/i386: Correct the warning message of Intel PT

Luwei Kang posted 1 patch 1 week ago
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git fetch https://github.com/patchew-project/qemu tags/patchew/1593499113-4768-1-git-send-email-luwei.kang@intel.com
Maintainers: Paolo Bonzini <pbonzini@redhat.com>, Eduardo Habkost <ehabkost@redhat.com>, Richard Henderson <rth@twiddle.net>
target/i386/cpu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

[PATCH] target/i386: Correct the warning message of Intel PT

Posted by Luwei Kang 1 week ago
The CPUID level need to be set to 0x14 manually on old
machine-type if Intel PT is enabled in guest. E.g. the
CPUID[0].EAX(level)=7 and CPUID[7].EBX[25](intel-pt)=1 when the
Qemu with "-machine pc-i440fx-3.1 -cpu qemu64,+intel-pt" parameter.

This patch corrects the warning message of the previous
submission(ddc2fc9).

Signed-off-by: Luwei Kang <luwei.kang@intel.com>
---
 target/i386/cpu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 90ffc5f..a0e39d1 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -6375,7 +6375,7 @@ static void x86_cpu_expand_features(X86CPU *cpu, Error **errp)
             } else if (cpu->env.cpuid_min_level < 0x14) {
                 mark_unavailable_features(cpu, FEAT_7_0_EBX,
                     CPUID_7_0_EBX_INTEL_PT,
-                    "Intel PT need CPUID leaf 0x14, please set by \"-cpu ...,+intel-pt,level=0x14\"");
+                    "Intel PT need CPUID leaf 0x14, please set by \"-cpu ...,+intel-pt,min-level=0x14\"");
             }
         }
 
-- 
1.8.3.1


Re: [PATCH] target/i386: Correct the warning message of Intel PT

Posted by Paolo Bonzini 1 week ago
On 30/06/20 08:38, Luwei Kang wrote:
> The CPUID level need to be set to 0x14 manually on old
> machine-type if Intel PT is enabled in guest. E.g. the
> CPUID[0].EAX(level)=7 and CPUID[7].EBX[25](intel-pt)=1 when the
> Qemu with "-machine pc-i440fx-3.1 -cpu qemu64,+intel-pt" parameter.
> 
> This patch corrects the warning message of the previous
> submission(ddc2fc9).
> 
> Signed-off-by: Luwei Kang <luwei.kang@intel.com>
> ---
>  target/i386/cpu.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/target/i386/cpu.c b/target/i386/cpu.c
> index 90ffc5f..a0e39d1 100644
> --- a/target/i386/cpu.c
> +++ b/target/i386/cpu.c
> @@ -6375,7 +6375,7 @@ static void x86_cpu_expand_features(X86CPU *cpu, Error **errp)
>              } else if (cpu->env.cpuid_min_level < 0x14) {
>                  mark_unavailable_features(cpu, FEAT_7_0_EBX,
>                      CPUID_7_0_EBX_INTEL_PT,
> -                    "Intel PT need CPUID leaf 0x14, please set by \"-cpu ...,+intel-pt,level=0x14\"");
> +                    "Intel PT need CPUID leaf 0x14, please set by \"-cpu ...,+intel-pt,min-level=0x14\"");
>              }
>          }
>  
> 

Queued, thanks.

Paolo