On Tue, Nov 19, 2024 at 07:49:58PM +0100, Jiri Denemark wrote:
> Signed-off-by: Jiri Denemark <jdenemar@xxxxxxxxxx>
> diff --git a/src/cpu_map/x86_Skylake-Client-v1.xml b/src/cpu_map/x86_Skylake-Client-v1.xml
> new file mode 100644
> index 0000000000..31e332b371
> --- /dev/null
> +++ b/src/cpu_map/x86_Skylake-Client-v1.xml
> @@ -0,0 +1,6 @@
> +<cpus>
> + <model name='Skylake-Client-v1'>
> + <decode host='off' guest='off'/>
> + <model name='Skylake-Client'/>
> + </model>
> +</cpus>
Here you've effectively setup a perfect alias.
> diff --git a/src/cpu_map/x86_Skylake-Client-v2.xml b/src/cpu_map/x86_Skylake-Client-v2.xml
> new file mode 100644
> index 0000000000..53318d4d9e
> --- /dev/null
> +++ b/src/cpu_map/x86_Skylake-Client-v2.xml
> @@ -0,0 +1,141 @@
> +<cpus>
> + <model name='Skylake-Client-v2'>
> + <decode host='on' guest='on'/>
> + <signature family='6' model='94'/>
> + <signature family='6' model='78'/>
> + <signature family='6' model='142'/>
> + <signature family='6' model='158'/>
> + <vendor name='Intel'/>
> + <feature name='3dnowprefetch'/>
> + <feature name='abm'/>
> + <feature name='adx'/>
snip
here though you're fully re-defining Skylake-Client-IBRS, although
not quite perfectly matching as 2 features are missing from -v2
that we did have in -IBRS:
<feature name='mpx' removed='yes'/>
<feature name='vmx-invvpid'/>
also the existing -IBRS had added='yes' for all the vmx
features.
IMHO the inconsistent handling of aliases between -v1 and the non-v1
models is undesirable.
With regards,
Daniel
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