[SeaBIOS] [PATCH] fw/msr_feature_control: add support to set MSR_IA32_FEATURE_CONTROL

[Paolo Bonzini]

> > > diff --git a/src/fw/msr_feature_control.c b/src/fw/msr_feature_control.c
> > > new file mode 100644
> > > index 0000000..35d4ab8
> > > --- /dev/null
> > > +++ b/src/fw/msr_feature_control.c
> > > @@ -0,0 +1,16 @@
> > > +#include "util.h" // msr_feature_control_setup
> > > +#include "x86.h" // wrmsr
> > > +#include "romfile.h" // romfile_find
> > > +
> > > +u64 feature_control_bits;
> > > +
> > > +void msr_feature_control_setup(void)
> > > +{
> > > +    struct romfile_s *f = romfile_find("etc/msr_feature_control");
> > > +    if (!f)
> > > +        return;
> > > +
> > > +    f->copy(f, &feature_control_bits, sizeof(feature_control_bits));
> > > +    if (feature_control_bits)
> > > +        wrmsr(MSR_IA32_FEATURE_CONTROL, feature_control_bits);
> > 
> > You can use wrmsr_smp and avoid the change below to handle_smp().  It
> > also removes the need for the feature_control_bits global variable.
> >
> 
> Good idea. I think I should also rename smp_mtrr and smp_mtrr_count to
> something like smp_msr and smp_msr_count, because they will not be used
> only for MTRR.

Yes, pleaase do!

Thanks,

Paolo