From: Waiman Long longman@redhat.com
[ Upstream commit aa77bfb354c495fc4361199e63fc5765b9e1e783 ]
STIBP stands for Single Thread Indirect Branch Predictors. The acronym, however, can be easily mis-spelled as STIPB. It is perhaps due to the presence of another related term - IBPB (Indirect Branch Predictor Barrier).
Fix the mis-spelling in the code.
Signed-off-by: Waiman Long longman@redhat.com Signed-off-by: Borislav Petkov bp@suse.de Cc: "H. Peter Anvin" hpa@zytor.com Cc: Andi Kleen ak@linux.intel.com Cc: David Woodhouse dwmw@amazon.co.uk Cc: Ingo Molnar mingo@redhat.com Cc: Jiri Kosina jkosina@suse.cz Cc: Josh Poimboeuf jpoimboe@redhat.com Cc: KarimAllah Ahmed karahmed@amazon.de Cc: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Cc: Peter Zijlstra peterz@infradead.org Cc: Thomas Gleixner tglx@linutronix.de Cc: Tim Chen tim.c.chen@linux.intel.com Cc: x86-ml x86@kernel.org Link: https://lkml.kernel.org/r/1544039368-9009-1-git-send-email-longman@redhat.co... Signed-off-by: Sasha Levin sashal@kernel.org --- arch/x86/kernel/cpu/bugs.c | 6 +++--- arch/x86/kernel/process.h | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c index 1a0ab4af93b7..9fddbdcc1874 100644 --- a/arch/x86/kernel/cpu/bugs.c +++ b/arch/x86/kernel/cpu/bugs.c @@ -59,7 +59,7 @@ static u64 x86_spec_ctrl_mask = SPEC_CTRL_IBRS; u64 x86_amd_ls_cfg_base; u64 x86_amd_ls_cfg_ssbd_mask;
-/* Control conditional STIPB in switch_to() */ +/* Control conditional STIBP in switch_to() */ DEFINE_STATIC_KEY_FALSE(switch_to_cond_stibp); /* Control conditional IBPB in switch_mm() */ DEFINE_STATIC_KEY_FALSE(switch_mm_cond_ibpb); @@ -725,12 +725,12 @@ spectre_v2_user_select_mitigation(enum spectre_v2_mitigation_cmd v2_cmd) "always-on" : "conditional"); }
- /* If enhanced IBRS is enabled no STIPB required */ + /* If enhanced IBRS is enabled no STIBP required */ if (spectre_v2_enabled == SPECTRE_V2_IBRS_ENHANCED) return;
/* - * If SMT is not possible or STIBP is not available clear the STIPB + * If SMT is not possible or STIBP is not available clear the STIBP * mode. */ if (!smt_possible || !boot_cpu_has(X86_FEATURE_STIBP)) diff --git a/arch/x86/kernel/process.h b/arch/x86/kernel/process.h index 898e97cf6629..320ab978fb1f 100644 --- a/arch/x86/kernel/process.h +++ b/arch/x86/kernel/process.h @@ -19,7 +19,7 @@ static inline void switch_to_extra(struct task_struct *prev, if (IS_ENABLED(CONFIG_SMP)) { /* * Avoid __switch_to_xtra() invocation when conditional - * STIPB is disabled and the only different bit is + * STIBP is disabled and the only different bit is * TIF_SPEC_IB. For CONFIG_SMP=n TIF_SPEC_IB is not * in the TIF_WORK_CTXSW masks. */