On Wednesday, 2021-03-03 at 09:45:30 -06, Babu Moger wrote:
> 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.gupta@cloud.ionos.com>
> Signed-off-by: Babu Moger <babu.moger@amd.com>
> Signed-off-by: Pankaj Gupta <pankaj.gupta@cloud.ionos.com>
Reviewed-by: David Edmondson <david.edmondson@oracle.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",
dme.
--
And the sign said: long haired freaky people need not apply.