Found the following cpu feature bits missing from EPYC-Rome model. ibrs : Indirect Branch Restricted Speculation ssbd : Speculative Store Bypass Disable
These new features will be added in EPYC-Rome-v2. The -cpu help output after the change. x86 EPYC-Rome (alias configured by machine type) x86 EPYC-Rome-v1 AMD EPYC-Rome Processor x86 EPYC-Rome-v2 AMD EPYC-Rome Processor Reported-by: Pankaj Gupta <pankaj.gu...@cloud.ionos.com> Signed-off-by: Babu Moger <babu.mo...@amd.com> Signed-off-by: Pankaj Gupta <pankaj.gu...@cloud.ionos.com> --- v2: Model-id remains same between EPYC-Rome-v1 and EPYC-Rome-v2. Removed model-id in the patch. target/i386/cpu.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 6a53446e6a..30e7188b0e 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -4179,6 +4179,18 @@ static X86CPUDefinition builtin_x86_defs[] = { .xlevel = 0x8000001E, .model_id = "AMD EPYC-Rome Processor", .cache_info = &epyc_rome_cache_info, + .versions = (X86CPUVersionDefinition[]) { + { .version = 1 }, + { + .version = 2, + .props = (PropValue[]) { + { "ibrs", "on" }, + { "amd-ssbd", "on" }, + { /* end of list */ } + } + }, + { /* end of list */ } + } }, { .name = "EPYC-Milan",