[PATCH v2 4/4] target/i386: Advertise CET related flags in feature words

[Yang Weijiang]

Add SHSTK and IBT flags in feature words with entry/exit
control flags.

CET SHSTK and IBT feature are enumerated via CPUID(EAX=7,ECX=0)
ECX[bit 7] and EDX[bit 20]. CET states load/restore at vmentry/
vmexit are controlled by VMX_ENTRY_CTLS[bit 20] and VMX_EXIT_CTLS[bit 28].
Enable these flags so that KVM can enumerate the features properly.

CET feature is only available on platforms with IA32_VMX_BASIC[bit 56]
set, otherwise, CET features are disabled in KVM.

Signed-off-by: Yang Weijiang <weijiang.yang@intel.com>
---
 target/i386/cpu.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index ea11b589e3..79a90e35bf 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -835,7 +835,7 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
         .type = CPUID_FEATURE_WORD,
         .feat_names = {
             NULL, "avx512vbmi", "umip", "pku",
-            NULL /* ospke */, "waitpkg", "avx512vbmi2", NULL,
+            NULL /* ospke */, "waitpkg", "avx512vbmi2", "shstk",
             "gfni", "vaes", "vpclmulqdq", "avx512vnni",
             "avx512bitalg", NULL, "avx512-vpopcntdq", NULL,
             "la57", NULL, NULL, NULL,
@@ -858,7 +858,7 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
             "avx512-vp2intersect", NULL, "md-clear", NULL,
             NULL, NULL, "serialize", NULL,
             "tsx-ldtrk", NULL, NULL /* pconfig */, "arch-lbr",
-            NULL, NULL, "amx-bf16", "avx512-fp16",
+            "ibt", NULL, "amx-bf16", "avx512-fp16",
             "amx-tile", "amx-int8", "spec-ctrl", "stibp",
             NULL, "arch-capabilities", "core-capability", "ssbd",
         },
@@ -1120,7 +1120,7 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
             "vmx-exit-save-efer", "vmx-exit-load-efer",
                 "vmx-exit-save-preemption-timer", "vmx-exit-clear-bndcfgs",
             NULL, "vmx-exit-clear-rtit-ctl", NULL, NULL,
-            NULL, "vmx-exit-load-pkrs", NULL, NULL,
+            "vmx-exit-save-cet-ctl", "vmx-exit-load-pkrs", NULL, NULL,
         },
         .msr = {
             .index = MSR_IA32_VMX_TRUE_EXIT_CTLS,
@@ -1135,7 +1135,7 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
             NULL, "vmx-entry-ia32e-mode", NULL, NULL,
             NULL, "vmx-entry-load-perf-global-ctrl", "vmx-entry-load-pat", 
"vmx-entry-load-efer",
             "vmx-entry-load-bndcfgs", NULL, "vmx-entry-load-rtit-ctl", NULL,
-            NULL, NULL, "vmx-entry-load-pkrs", NULL,
+            "vmx-entry-load-cet-ctl", NULL, "vmx-entry-load-pkrs", NULL,
             NULL, NULL, NULL, NULL,
             NULL, NULL, NULL, NULL,
         },
@@ -1192,6 +1192,7 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
         .feat_names = {
             [54] = "vmx-ins-outs",
             [55] = "vmx-true-ctls",
+            [56] = "vmx-hw-no-errcode",
         },
         .msr = {
             .index = MSR_IA32_VMX_BASIC,
-- 
2.27.0