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linux-stable/include/linux/sched
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Thomas Gleixner a74cfffb03 x86/speculation: Rework SMT state change 
arch_smt_update() is only called when the sysfs SMT control knob is
changed. This means that when SMT is enabled in the sysfs control knob the
system is considered to have SMT active even if all siblings are offline.

To allow finegrained control of the speculation mitigations, the actual SMT
state is more interesting than the fact that siblings could be enabled.

Rework the code, so arch_smt_update() is invoked from each individual CPU
hotplug function, and simplify the update function while at it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Woodhouse <dwmw@amazon.co.uk>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Casey Schaufler <casey.schaufler@intel.com>
Cc: Asit Mallick <asit.k.mallick@intel.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Jon Masters <jcm@redhat.com>
Cc: Waiman Long <longman9394@gmail.com>
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: Dave Stewart <david.c.stewart@intel.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20181125185004.521974984@linutronix.de
2018-11-28 11:57:07 +01:00
..
autogroup.h
clock.h
coredump.h
cpufreq.h
cputime.h
deadline.h
debug.h
hotplug.h
idle.h
init.h
isolation.h
jobctl.h
loadavg.h sched: loadavg: make calc_load_n() public 2018-10-26 16:26:32 -07:00
mm.h fs: fsnotify: account fsnotify metadata to kmemcg 2018-08-17 16:20:30 -07:00
nohz.h
numa_balancing.h
prio.h
rt.h
signal.h signal: Distinguish between kernel_siginfo and siginfo 2018-10-03 16:47:43 +02:00
smt.h x86/speculation: Rework SMT state change 2018-11-28 11:57:07 +01:00
stat.h cpuidle: menu: Remove get_loadavg() from the performance multiplier 2018-10-25 16:49:27 +02:00
sysctl.h kernel/hung_task.c: allow to set checking interval separately from timeout 2018-08-22 10:52:47 -07:00
task.h
task_stack.h
topology.h sched/topology: Add SD_ASYM_CPUCAPACITY flag detection 2018-09-10 11:05:45 +02:00
user.h userns: use refcount_t for reference counting instead atomic_t 2018-08-22 10:52:46 -07:00
wake_q.h
xacct.h