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| author | Ingo Molnar <mingo@kernel.org> | 2019-05-13 21:30:15 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-05-13 21:30:15 +0300 |
| commit | 82045dd85566d87128dcc66277cf1177d9930a4a (patch) | |
| tree | 22fea6311a4866293005a1a44f34310e4007a3c9 /arch/x86/kernel/process.c | |
| parent | e0478542cfd4d993e38d5f92a3f3ecd238805e96 (diff) | |
| parent | ffa6f55eb6188ee73339cab710fabf30d13110a7 (diff) | |
| download | linux-82045dd85566d87128dcc66277cf1177d9930a4a.tar.xz | |
Merge branch 'linus' into core/urgent, to merge in dependent changes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/process.c')
| -rw-r--r-- | arch/x86/kernel/process.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index 58ac7be52c7a..d1d312d012a6 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -236,7 +236,7 @@ static int get_cpuid_mode(void) static int set_cpuid_mode(struct task_struct *task, unsigned long cpuid_enabled) { - if (!static_cpu_has(X86_FEATURE_CPUID_FAULT)) + if (!boot_cpu_has(X86_FEATURE_CPUID_FAULT)) return -ENODEV; if (cpuid_enabled) @@ -426,6 +426,8 @@ static __always_inline void __speculation_ctrl_update(unsigned long tifp, u64 msr = x86_spec_ctrl_base; bool updmsr = false; + lockdep_assert_irqs_disabled(); + /* * If TIF_SSBD is different, select the proper mitigation * method. Note that if SSBD mitigation is disabled or permanentely @@ -477,10 +479,12 @@ static unsigned long speculation_ctrl_update_tif(struct task_struct *tsk) void speculation_ctrl_update(unsigned long tif) { + unsigned long flags; + /* Forced update. Make sure all relevant TIF flags are different */ - preempt_disable(); + local_irq_save(flags); __speculation_ctrl_update(~tif, tif); - preempt_enable(); + local_irq_restore(flags); } /* Called from seccomp/prctl update */ @@ -666,7 +670,7 @@ static int prefer_mwait_c1_over_halt(const struct cpuinfo_x86 *c) if (c->x86_vendor != X86_VENDOR_INTEL) return 0; - if (!cpu_has(c, X86_FEATURE_MWAIT) || static_cpu_has_bug(X86_BUG_MONITOR)) + if (!cpu_has(c, X86_FEATURE_MWAIT) || boot_cpu_has_bug(X86_BUG_MONITOR)) return 0; return 1; |