[Qemu-devel] [PATCH v5 06/12] target-i386: Remove underscores from feat_names arrays

[Eduardo Habkost <ehabkost@redhat.com>]

Instead of translating the feature name entries when adding
property names, store the actual property names in the feature
name array.

For reference, here is the full list of functions that use
FeatureWordInfo::feat_names:

* x86_cpu_get_migratable_flags(): not affected, as it just
  check for non-NULL values.
* report_unavailable_features(): informative only. It will
  start printing feature names with hyphens.
* x86_cpu_list(): informative only. It will start printing
  feature names with hyphens
* x86_cpu_register_feature_bit_props(): not affected, as it
  was already calling feat2prop(). Now we can remove the
  feat2prop() calls safely.

So, the only user-visible effect of this patch are the new names
being used in help and error messages for users.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
Changes v4 -> v5:
* Remove the feat2prop() call from the alias registration
  loop, too
* Commit message update to enumerate all code that uses
  feat_names

Changes series v3 -> v4:
* New patch added to series
---
 target-i386/cpu.c | 36 ++++++++++++++++++++----------------
 1 file changed, 20 insertions(+), 16 deletions(-)

diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index cef4ecd..ec65aef 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -279,11 +279,11 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
     [FEAT_1_ECX] = {
         .feat_names = {
             "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",
-            "sse4.2|sse4_2", "x2apic", "movbe", "popcnt",
+            NULL, "pcid", "dca", "sse4.1|sse4-1",
+            "sse4.2|sse4-2", "x2apic", "movbe", "popcnt",
             "tsc-deadline", "aes", "xsave", "osxsave",
             "avx", "f16c", "rdrand", "hypervisor",
         },
@@ -303,7 +303,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
             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", "rdtscp",
+            NULL /* fxsr */, "fxsr-opt|ffxsr", "pdpe1gb", "rdtscp",
             NULL, "lm|i64", "3dnowext", "3dnow",
         },
         .cpuid_eax = 0x80000001, .cpuid_reg = R_EDX,
@@ -311,13 +311,13 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
     },
     [FEAT_8000_0001_ECX] = {
         .feat_names = {
-            "lahf_lm", "cmp_legacy", "svm", "extapic",
+            "lahf-lm", "cmp-legacy", "svm", "extapic",
             "cr8legacy", "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,
         },
         .cpuid_eax = 0x80000001, .cpuid_reg = R_ECX,
@@ -339,8 +339,8 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
     },
     [FEAT_KVM] = {
         .feat_names = {
-            "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,
@@ -400,9 +400,9 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
     },
     [FEAT_SVM] = {
         .feat_names = {
-            "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,
@@ -414,7 +414,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
     },
     [FEAT_7_0_EBX] = {
         .feat_names = {
-            "fsgsbase", "tsc_adjust", NULL, "bmi1",
+            "fsgsbase", "tsc-adjust", NULL, "bmi1",
             "hle", "avx2", NULL, "smep",
             "bmi2", "erms", "invpcid", "rtm",
             NULL, NULL, "mpx", NULL,
@@ -3332,11 +3332,15 @@ static void x86_cpu_register_feature_bit_props(X86CPU *cpu,
 
     names = g_strsplit(fi->feat_names[bitnr], "|", 0);
 
-    feat2prop(names[0]);
+    /* Property names should use "-" instead of "_".
+     * Old names containing underscores are registered as aliases
+     * using object_property_add_alias()
+     */
+    assert(!strchr(names[0], '_'));
     x86_cpu_register_bit_prop(cpu, names[0], &cpu->env.features[w], bitnr);
 
     for (i = 1; names[i]; i++) {
-        feat2prop(names[i]);
+        assert(!strchr(names[i], '_'));
         object_property_add_alias(obj, names[i], obj, names[0],
                                   &error_abort);
     }
-- 
2.7.4