Re: [PATCH Part1 RFC v4 02/36] x86/sev: Save the negotiated GHCB version

[Brijesh Singh]

On 8/10/21 4:17 AM, Borislav Petkov wrote:
> On Wed, Jul 07, 2021 at 01:14:32PM -0500, Brijesh Singh wrote:
> > diff --git a/arch/x86/kernel/sev-shared.c b/arch/x86/kernel/sev-shared.c
> > index 114f62fe2529..19c2306ac02d 100644
> > --- a/arch/x86/kernel/sev-shared.c
> > +++ b/arch/x86/kernel/sev-shared.c
> > @@ -14,6 +14,15 @@
> >   #define has_cpuflag(f)	boot_cpu_has(f)
> >   #endif
> >   
> > +/*
> > + * Since feature negotiation related variables are set early in the boot
> > + * process they must reside in the .data section so as not to be zeroed
> > + * out when the .bss section is later cleared.
> > + *
> > + * GHCB protocol version negotiated with the hypervisor.
> > + */
> > +static u16 ghcb_version __section(".data..ro_after_init");
>
> There's a define for that section specifier: __ro_after_init

Noted.

thanks