On 26/08/14 07:16, Juergen Gross wrote:
> With the dynamical mapping between cache modes and pgprot values it is now
> possible to use all cache modes via the Xen hypervisor PAT settings in a
> pv domain.
>
> All to be done is to read the PAT configuration MSR and set up the translation
> tables accordingly.
[...]
> +void xen_init_cache_types(void)
> +{
> + pat_init_cache_modes();
> +}
No need to introduce xen_init_cache_types(), just call
pat_init_cache_modes() directly.
> void xen_set_pat(u64 pat)
> {
> - /* We expect Linux to use a PAT setting of
> - * UC UC- WC WB (ignoring the PAT flag) */
> - WARN_ON(pat != 0x0007010600070106ull);
> + xen_init_cache_types();
> }
Remove xen_set_pat() and remove the special-cased handling of the PAT
MSR from xen_write_msr_safe().
David
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