Re: [PATCH v4] x86/speculation/l1tf: Add KConfig for setting the L1D cache flush mode

[Abhishek Bhardwaj]

On Wed, Jul 8, 2020 at 12:34 PM Randy Dunlap <rdunlap@xxxxxxxxxxxxx> wrote:
>
> Hi again,
>
> On 7/8/20 12:25 PM, Abhishek Bhardwaj wrote:
> > diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
> > index b277a2db62676..1f85374a0b812 100644
> > --- a/arch/x86/kvm/Kconfig
> > +++ b/arch/x86/kvm/Kconfig
> > @@ -107,4 +107,17 @@ config KVM_MMU_AUDIT
> >        This option adds a R/W kVM module parameter 'mmu_audit', which allows
> >        auditing of KVM MMU events at runtime.
> >
> > +config KVM_VMENTRY_L1D_FLUSH
> > +     int "L1D cache flush settings (1-3)"
> > +     range 1 3
> > +     default "2"
> > +     depends on KVM && X86_64
> > +     help
> > +      This setting determines the L1D cache flush behavior before a VMENTER.
> > +      This is similar to setting the option / parameter to
> > +      kvm-intel.vmentry_l1d_flush.
> > +      1 - Never flush.
> > +      2 - Conditionally flush.
> > +      3 - Always flush.
> > +
> >  endif # VIRTUALIZATION
>
> If you do a v5, the help text lines (under "help") should be indented
> with one tab + 2 spaces according to Documentation/process/coding-style.rst.

Apologies for missing this. Fixed in v5 -
https://lkml.org/lkml/2020/7/8/1369

>
> --
> ~Randy
>


-- 
Abhishek