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

[Igor Mammedov]

On Fri,  6 May 2016 15:11:31 -0300
Eduardo Habkost <address@hidden> 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.

wouldn't that change output of '-cpu help',
can it break libvirt?


> Add extra feat2prop() calls to x86_cpu_parse_featurestr() to keep
> compatibility with the old that had underscores.
> 
> Cc: Jiri Denemark <address@hidden>
> Cc: address@hidden
> Signed-off-by: Eduardo Habkost <address@hidden>
> ---
>  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;
>          if (featurestr[0] == '+') {
> +            feat2prop(featurestr);
>              add_flagname_to_bitmaps(featurestr + 1, plus_features, 
> &local_err);
>          } else if (featurestr[0] == '-') {
> +            feat2prop(featurestr);
>              add_flagname_to_bitmaps(featurestr + 1, minus_features, 
> &local_err);
>          } else if ((val = strchr(featurestr, '='))) {
>              *val = 0; val++;
> @@ -3137,11 +3139,9 @@ static void x86_cpu_register_feature_bit_props(X86CPU 
> *cpu,
>  
>      names = g_strsplit(fi->feat_names[bitnr], "|", 0);
>  
> -    feat2prop(names[0]);
>      x86_cpu_register_bit_prop(cpu, names[0], &cpu->env.features[w], bitnr);
>  
>      for (i = 1; names[i]; i++) {
> -        feat2prop(names[i]);
>          object_property_add_alias(obj, names[i], obj, names[0],
>                                    &error_abort);
>      }