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Re: [PATCH v2 03/10] target/i386: Fix duplicated feature name in FEAT_KV


From: Tim Wiederhake
Subject: Re: [PATCH v2 03/10] target/i386: Fix duplicated feature name in FEAT_KVM
Date: Fri, 15 Sep 2023 17:53:05 +0200
User-agent: Evolution 3.46.4 (3.46.4-1.fc37)

On Fri, 2023-09-08 at 16:21 +0200, Igor Mammedov wrote:
> On Fri,  8 Sep 2023 14:45:27 +0200
> Tim Wiederhake <twiederh@redhat.com> wrote:
> 
> > The mistake became apparent as there were two features with the
> > same name
> > in this cpuid leaf. The names are now in line with the
> > documentation from
> > https://kernel.org/doc/html/latest/virt/kvm/x86/cpuid.html
> 
> I'd describe what duplication breaks and it's effects.
> 
> and also why it's considered that it's safe to change names here.
> 
This is my first contribution to qemu. I do not know whether it is safe
to change the names, nor how to find out I'm afraid. I ran `make test`,
if that is what you mean.

Please let me know what you need me to do here.

In the meantime, I will separate the patches that rename / fix feature
names from the remaining patch set, and split the changes up as
requested.

Regards,
Tim

> > Fixes: 642258c6c7 ("kvm: add kvmclock to its second bit")
> > Signed-off-by: Tim Wiederhake <twiederh@redhat.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 f10d343935..f0fedf4b88 100644
> > --- a/target/i386/cpu.c
> > +++ b/target/i386/cpu.c
> > @@ -852,7 +852,7 @@ FeatureWordInfo
> > feature_word_info[FEATURE_WORDS] = {
> >      [FEAT_KVM] = {
> >          .type = CPUID_FEATURE_WORD,
> >          .feat_names = {
> > -            "kvmclock", "kvm-nopiodelay", "kvm-mmu", "kvmclock",
> > +            "kvmclock", "kvm-nopiodelay", "kvm-mmu", "kvmclock2",
> >              "kvm-asyncpf", "kvm-steal-time", "kvm-pv-eoi", "kvm-
> > pv-unhalt",
> >              NULL, "kvm-pv-tlb-flush", NULL, "kvm-pv-ipi",
> >              "kvm-poll-control", "kvm-pv-sched-yield", "kvm-
> > asyncpf-int", "kvm-msi-ext-dest-id",
> 




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