[Qemu-devel] [PATCH RFC] i386: Enable NPT and NRIPSAVE for Epyc CPUs

[Vitaly Kuznetsov]

Epyc CPUs support NPT and NRIPSAVE features and KVM exposes these when
present. Add them to EPYC and EPYC-IBPB cpu models.

Signed-off-by: Vitaly Kuznetsov <address@hidden>
---
- RFC part: I'm not sure when these features first appeared, we may want to
  modify some Opteron_* models too.
---
 target/i386/cpu.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 677a3bd5fb..0a10fbeccc 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -2843,6 +2843,8 @@ static X86CPUDefinition builtin_x86_defs[] = {
             CPUID_XSAVE_XGETBV1,
         .features[FEAT_6_EAX] =
             CPUID_6_EAX_ARAT,
+        .features[FEAT_SVM] =
+            CPUID_SVM_NPT | CPUID_SVM_NRIPSAVE,
         .xlevel = 0x8000001E,
         .model_id = "AMD EPYC Processor",
         .cache_info = &epyc_cache_info,
@@ -2891,6 +2893,8 @@ static X86CPUDefinition builtin_x86_defs[] = {
             CPUID_XSAVE_XGETBV1,
         .features[FEAT_6_EAX] =
             CPUID_6_EAX_ARAT,
+        .features[FEAT_SVM] =
+            CPUID_SVM_NPT | CPUID_SVM_NRIPSAVE,
         .xlevel = 0x8000001E,
         .model_id = "AMD EPYC Processor (with IBPB)",
         .cache_info = &epyc_cache_info,
-- 
2.19.2