Re: [PATCH RFC 3/7] kvm: x86: XSAVE state and XFD MSRs context switch

[Liu, Jing2]

On 2/7/2021 7:49 PM, Borislav Petkov wrote:
> On Sun, Feb 07, 2021 at 10:42:52AM -0500, Jing Liu wrote:
> > diff --git a/arch/x86/kernel/fpu/init.c b/arch/x86/kernel/fpu/init.c
> > index 7e0c68043ce3..fbb761fc13ec 100644
> > --- a/arch/x86/kernel/fpu/init.c
> > +++ b/arch/x86/kernel/fpu/init.c
> > @@ -145,6 +145,7 @@ EXPORT_SYMBOL_GPL(fpu_kernel_xstate_min_size);
> >    * can be dynamically expanded to include some states up to this size.
> >    */
> >   unsigned int fpu_kernel_xstate_max_size;
> > +EXPORT_SYMBOL_GPL(fpu_kernel_xstate_max_size);
> >   
> >   /* Get alignment of the TYPE. */
> >   #define TYPE_ALIGN(TYPE) offsetof(struct { char x; TYPE test; }, test)
> > diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
> > index 080f3be9a5e6..9c471a0364e2 100644
> > --- a/arch/x86/kernel/fpu/xstate.c
> > +++ b/arch/x86/kernel/fpu/xstate.c
> > @@ -77,12 +77,14 @@ static struct xfeature_capflag_info xfeature_capflags[] __initdata = {
> >    * XSAVE buffer, both supervisor and user xstates.
> >    */
> >   u64 xfeatures_mask_all __read_mostly;
> > +EXPORT_SYMBOL_GPL(xfeatures_mask_all);
> >   
> >   /*
> >    * This represents user xstates, a subset of xfeatures_mask_all, saved in a
> >    * dynamic kernel XSAVE buffer.
> >    */
> >   u64 xfeatures_mask_user_dynamic __read_mostly;
> > +EXPORT_SYMBOL_GPL(xfeatures_mask_user_dynamic);
> >   
> >   static unsigned int xstate_offsets[XFEATURE_MAX] = { [ 0 ... XFEATURE_MAX - 1] = -1};
> >   static unsigned int xstate_sizes[XFEATURE_MAX]   = { [ 0 ... XFEATURE_MAX - 1] = -1};
> Make sure you Cc x86@xxxxxxxxxx when touching code outside of kvm.
>
> There's this script called scripts/get_maintainer.pl which will tell you who to
> Cc. Use it before you send next time please.
>
> Thx.
Thank you for the reminder. I'll cc that next time.

BRs,
Jing