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Re: [libvirt] [PATCH 8/9] target-i386: Use "-" instead of "_" on all feature names



On Tue, May 24, 2016 at 02:17:03PM +0200, Igor Mammedov wrote:
> On Fri,  6 May 2016 15:11:31 -0300
> Eduardo Habkost <ehabkost redhat com> wrote:
> 
> > This makes the feature name tables in feature_word_info all match
> > the actual QOM property names we use.
> > 
> > This will make the command-line interface more consistent,
> > allowing the QOM property names to be used as "-cpu" arguments
> > directly.
> > 
> > Add extra feat2prop() calls to x86_cpu_parse_featurestr() to keep
> > compatibility with the old that had underscores.
> > 
> > Cc: Jiri Denemark <jdenemar redhat com>
> > Cc: libvir-list redhat com
> > Signed-off-by: Eduardo Habkost <ehabkost redhat com>
> > ---
> >  target-i386/cpu.c | 32 ++++++++++++++++----------------
> >  1 file changed, 16 insertions(+), 16 deletions(-)
> > 
> > diff --git a/target-i386/cpu.c b/target-i386/cpu.c
> > index 309ef55..e7365d1 100644
> > --- a/target-i386/cpu.c
> > +++ b/target-i386/cpu.c
> > @@ -187,7 +187,7 @@ static const char *feature_name[] = {
> >  };
> >  static const char *ext_feature_name[] = {
> >      "pni|sse3" /* Intel,AMD sse3 */, "pclmulqdq|pclmuldq", "dtes64", "monitor",
> > -    "ds_cpl", "vmx", "smx", "est",
> > +    "ds-cpl", "vmx", "smx", "est",
> >      "tm2", "ssse3", "cid", NULL,
> >      "fma", "cx16", "xtpr", "pdcm",
> >      NULL, "pcid", "dca", "sse4.1|sse4_1",
> > @@ -207,17 +207,17 @@ static const char *ext2_feature_name[] = {
> >      NULL /* mtrr */, NULL /* pge */, NULL /* mca */, NULL /* cmov */,
> >      NULL /* pat */, NULL /* pse36 */, NULL, NULL /* Linux mp */,
> >      "nx|xd", NULL, "mmxext", NULL /* mmx */,
> > -    NULL /* fxsr */, "fxsr_opt|ffxsr", "pdpe1gb" /* AMD Page1GB */, "rdtscp",
> > +    NULL /* fxsr */, "fxsr-opt|ffxsr", "pdpe1gb" /* AMD Page1GB */, "rdtscp",
> >      NULL, "lm|i64", "3dnowext", "3dnow",
> >  };
> >  static const char *ext3_feature_name[] = {
> > -    "lahf_lm" /* AMD LahfSahf */, "cmp_legacy", "svm", "extapic" /* AMD ExtApicSpace */,
> > +    "lahf-lm" /* AMD LahfSahf */, "cmp-legacy", "svm", "extapic" /* AMD ExtApicSpace */,
> >      "cr8legacy" /* AMD AltMovCr8 */, "abm", "sse4a", "misalignsse",
> >      "3dnowprefetch", "osvw", "ibs", "xop",
> >      "skinit", "wdt", NULL, "lwp",
> > -    "fma4", "tce", NULL, "nodeid_msr",
> > -    NULL, "tbm", "topoext", "perfctr_core",
> > -    "perfctr_nb", NULL, NULL, NULL,
> > +    "fma4", "tce", NULL, "nodeid-msr",
> > +    NULL, "tbm", "topoext", "perfctr-core",
> > +    "perfctr-nb", NULL, NULL, NULL,
> >      NULL, NULL, NULL, NULL,
> >  };
> >  
> > @@ -233,8 +233,8 @@ static const char *ext4_feature_name[] = {
> >  };
> >  
> >  static const char *kvm_feature_name[] = {
> > -    "kvmclock", "kvm_nopiodelay", "kvm_mmu", "kvmclock",
> > -    "kvm_asyncpf", "kvm_steal_time", "kvm_pv_eoi", "kvm_pv_unhalt",
> > +    "kvmclock", "kvm-nopiodelay", "kvm-mmu", "kvmclock",
> > +    "kvm-asyncpf", "kvm-steal-time", "kvm-pv-eoi", "kvm-pv-unhalt",
> >      NULL, NULL, NULL, NULL,
> >      NULL, NULL, NULL, NULL,
> >      NULL, NULL, NULL, NULL,
> > @@ -244,9 +244,9 @@ static const char *kvm_feature_name[] = {
> >  };
> >  
> >  static const char *svm_feature_name[] = {
> > -    "npt", "lbrv", "svm_lock", "nrip_save",
> > -    "tsc_scale", "vmcb_clean",  "flushbyasid", "decodeassists",
> > -    NULL, NULL, "pause_filter", NULL,
> > +    "npt", "lbrv", "svm-lock", "nrip-save",
> > +    "tsc-scale", "vmcb-clean",  "flushbyasid", "decodeassists",
> > +    NULL, NULL, "pause-filter", NULL,
> >      "pfthreshold", NULL, NULL, NULL,
> >      NULL, NULL, NULL, NULL,
> >      NULL, NULL, NULL, NULL,
> > @@ -255,7 +255,7 @@ static const char *svm_feature_name[] = {
> >  };
> >  
> >  static const char *cpuid_7_0_ebx_feature_name[] = {
> > -    "fsgsbase", "tsc_adjust", NULL, "bmi1", "hle", "avx2", NULL, "smep",
> > +    "fsgsbase", "tsc-adjust", NULL, "bmi1", "hle", "avx2", NULL, "smep",
> >      "bmi2", "erms", "invpcid", "rtm", NULL, NULL, "mpx", NULL,
> >      "avx512f", NULL, "rdseed", "adx", "smap", NULL, "pcommit", "clflushopt",
> >      "clwb", NULL, "avx512pf", "avx512er", "avx512cd", NULL, NULL, NULL,
> > @@ -1894,8 +1894,8 @@ static PropertyInfo qdev_prop_spinlocks = {
> >      .set   = x86_set_hv_spinlocks,
> >  };
> >  
> > -/* Convert all '_' in a feature string option name to '-', to make feature
> > - * name conform to QOM property naming rule, which uses '-' instead of '_'.
> > +/* Convert all '_' in a feature string option name to '-', to keep compatibility
> > + * with old feature names that used "_" instead of "-".
> >   */
> >  static inline void feat2prop(char *s)
> >  {
> > @@ -1925,8 +1925,10 @@ static void x86_cpu_parse_featurestr(CPUState *cs, char *features,
> >      while (featurestr) {
> >          char *val;
> I'd place a single feat2prop() here
> and delete it from other call sites in this function.

A previous version of this patch had it. But it would change the
property value too, not just the property name (breaking stuff
like "model-id=some_string").

-- 
Eduardo


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