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SubjectRe: [patch 22/24] x86/speculation: Create PRCTL interface to restrict indirect branch speculation
On Thu, 22 Nov 2018, Peter Zijlstra wrote:

> On Wed, Nov 21, 2018 at 09:14:52PM +0100, Thomas Gleixner wrote:
> > @@ -1453,6 +1453,8 @@ static inline bool is_percpu_thread(void
> > #define PFA_SPREAD_SLAB 2 /* Spread some slab caches over cpuset */
> > #define PFA_SPEC_SSB_DISABLE 3 /* Speculative Store Bypass disabled */
> > #define PFA_SPEC_SSB_FORCE_DISABLE 4 /* Speculative Store Bypass force disabled*/
> > +#define PFA_SPEC_INDIR_BRANCH_DISABLE 5 /* Indirect branch speculation restricted */
> > +#define PFA_SPEC_INDIR_BRANCH_FORCE_DISABLE 6 /* Indirect branch speculation permanentely restricted */
> >
> > #define TASK_PFA_TEST(name, func) \
> > static inline bool task_##func(struct task_struct *p) \
> > @@ -1484,6 +1486,13 @@ TASK_PFA_CLEAR(SPEC_SSB_DISABLE, spec_ss
> > TASK_PFA_TEST(SPEC_SSB_FORCE_DISABLE, spec_ssb_force_disable)
> > TASK_PFA_SET(SPEC_SSB_FORCE_DISABLE, spec_ssb_force_disable)
> >
> > +TASK_PFA_TEST(SPEC_INDIR_BRANCH_DISABLE, spec_indir_branch_disable)
> > +TASK_PFA_SET(SPEC_INDIR_BRANCH_DISABLE, spec_indir_branch_disable)
> > +TASK_PFA_CLEAR(SPEC_INDIR_BRANCH_DISABLE, spec_indir_branch_disable)
> > +
> > +TASK_PFA_TEST(SPEC_INDIR_BRANCH_FORCE_DISABLE, spec_indir_branch_force_disable)
> > +TASK_PFA_SET(SPEC_INDIR_BRANCH_FORCE_DISABLE, spec_indir_branch_force_disable)
> > +
> > static inline void
> > current_restore_flags(unsigned long orig_flags, unsigned long flags)
> > {
>
> s/INDIR_BRANCH/IB/ would be consistent here with the SSB case.

Good point.

Thanks,

tglx

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