| Date | Thu, 22 Nov 2018 10:03:21 +0100 | From | Peter Zijlstra <> | Subject | Re: [patch 22/24] x86/speculation: Create PRCTL interface to restrict indirect branch speculation |
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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.
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