linux-kernel - Re: [PATCH v3 27/37] x86/shstk: Introduce routines modifying shstk

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Message-ID: <b16f268f8eb7a97dc350b647d9446262b1d2501d.camel@intel.com>
Date:   Tue, 15 Nov 2022 20:56:16 +0000
From:   "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>
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Subject: Re: [PATCH v3 27/37] x86/shstk: Introduce routines modifying shstk

On Tue, 2022-11-15 at 15:22 +0100, Peter Zijlstra wrote:
> On Fri, Nov 04, 2022 at 03:35:54PM -0700, Rick Edgecombe wrote:
> > +static unsigned long get_user_shstk_addr(void)
> > +{
> > +     unsigned long long ssp;
> > +
> > +     fpregs_lock_and_load();
> > +
> > +     rdmsrl(MSR_IA32_PL3_SSP, ssp);
> > +
> > +     fpregs_unlock();
> > +
> > +     return ssp;
> > +}
> 
> This doesn't return the shstk addr, unlike what the name suggests,
> right?

That's a good point. get_user_ssp() would be a better name.