On Tue, Feb 26, 2013 at 10:57:56PM +0100, Igor Mammedov wrote:
> On Sat, 23 Feb 2013 16:45:00 +0100
> Jan Kiszka <jan.kiszka@xxxxxx> wrote:
>
> > From: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
> >
> > Several issues fixed:
> > - We were missing a bunch of feature lists. Fix this by simply dumping
> > the meta list feature_word_info.
> > - kvm_enabled() cannot be true at this point because accelerators are
> > initialized much later during init. Simply dump unconditionally.
> Why not to move list_cpu after accelerators are initialized?
Because help output is simply documentation and shouldn't depend on any
other config option parsing or accelerator initialization at all?
>
> > - Add explanation for "host" CPU type.
> >
> > Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
> > ---
> > target-i386/cpu.c | 20 +++++++++-----------
> > 1 files changed, 9 insertions(+), 11 deletions(-)
> >
> > diff --git a/target-i386/cpu.c b/target-i386/cpu.c
> > index dfcf86e..6e742f0 100644
> > --- a/target-i386/cpu.c
> > +++ b/target-i386/cpu.c
> > @@ -1453,18 +1453,16 @@ void x86_cpu_list(FILE *f, fprintf_function cpu_fprintf)
> > snprintf(buf, sizeof(buf), "%s", def->name);
> > (*cpu_fprintf)(f, "x86 %16s %-48s\n", buf, def->model_id);
> > }
> > - if (kvm_enabled()) {
> > - (*cpu_fprintf)(f, "x86 %16s\n", "[host]");
> > - }
> > + (*cpu_fprintf)(f, "x86 %16s %-48s\n", "host",
> > + "KVM processor with all supported host features");
> > +
> that would make 'host' visible to users even if QEMU compiled without KVM
> support. No big harm, but autotest could get confused when it gets 'host' CPU
> but QEMU doesn't run because it's not really supported.
Then we have to fix the autotest test code to not try it without KVM.
:-)
Help output is not a probing mechanism (although we often misuse it as
if it were), and I expect help output to be static and not depend on any
subsystem initialization.
For example: an user without permission to open /dev/kvm should be still
able to see help text explaining that "-cpu host" is available when KVM
is enabled and working.
>
> > (*cpu_fprintf)(f, "\nRecognized CPUID flags:\n");
> > - listflags(buf, sizeof(buf), (uint32_t)~0, feature_name, 1);
> > - (*cpu_fprintf)(f, " %s\n", buf);
> > - listflags(buf, sizeof(buf), (uint32_t)~0, ext_feature_name, 1);
> > - (*cpu_fprintf)(f, " %s\n", buf);
> > - listflags(buf, sizeof(buf), (uint32_t)~0, ext2_feature_name, 1);
> > - (*cpu_fprintf)(f, " %s\n", buf);
> > - listflags(buf, sizeof(buf), (uint32_t)~0, ext3_feature_name, 1);
> > - (*cpu_fprintf)(f, " %s\n", buf);
> > + for (i = 0; i < ARRAY_SIZE(feature_word_info); i++) {
> > + FeatureWordInfo *fw = &feature_word_info[i];
> > +
> > + listflags(buf, sizeof(buf), (uint32_t)~0, fw->feat_names, 1);
> > + (*cpu_fprintf)(f, " %s\n", buf);
> > + }
> > }
> >
> > CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp)
> > --
> > 1.7.3.4
> >
>
>
> --
> Regards,
> Igor
--
Eduardo
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