[PATCH] i386: Add CPUID bit for CLZERO and XSAVEERPTR

[Sebastian Andrzej Siewior]

The CPUID bits CLZERO and XSAVEERPTR are availble on AMD's ZEN platform
and could be passed to the guest.

Signed-off-by: Sebastian Andrzej Siewior <address@hidden>
---

I tweaked the kernel to expose these flags and figured out that this is
also missing in order see those bits in the guest.

 target/i386/cpu.c | 2 +-
 target/i386/cpu.h | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index fbed2eb804e32..e00ef3c917391 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1113,7 +1113,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = 
{
     [FEAT_8000_0008_EBX] = {
         .type = CPUID_FEATURE_WORD,
         .feat_names = {
-            NULL, NULL, NULL, NULL,
+            "clzero", NULL, "xsaveerptr", NULL,
             NULL, NULL, NULL, NULL,
             NULL, "wbnoinvd", NULL, NULL,
             "ibpb", NULL, NULL, NULL,
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 0732e059ec989..cc475c703fc4d 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -689,6 +689,8 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS];
 #define CPUID_7_0_EDX_ARCH_CAPABILITIES (1U << 29)  /*Arch Capabilities*/
 #define CPUID_7_0_EDX_SPEC_CTRL_SSBD  (1U << 31) /* Speculative Store Bypass 
Disable */
 
+#define CPUD_800_008_EBX_CLZERO                (1U << 0) /* CLZERO instruction 
*/
+#define CPUD_800_008_EBX_XSAVEERPTR    (1U << 2) /* Always save/restore FP 
error pointers */
 #define CPUID_8000_0008_EBX_WBNOINVD  (1U << 9)  /* Write back and
                                                                              
do not invalidate cache */
 #define CPUID_8000_0008_EBX_IBPB    (1U << 12) /* Indirect Branch Prediction 
Barrier */
-- 
2.23.0