From: Andy Lutomirski luto@kernel.org
This patch has been added to the 4.1 stable tree. If you have any objections, please let us know.
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[ Upstream commit 8bf1ebca215c262e48c15a4a15f175991776f57f ]
There are multiple call sites that apply forced CPU caps. Factor them into a helper.
Signed-off-by: Andy Lutomirski luto@kernel.org Reviewed-by: Borislav Petkov bp@suse.de Cc: Borislav Petkov bp@alien8.de Cc: Brian Gerst brgerst@gmail.com Cc: Dave Hansen dave.hansen@linux.intel.com Cc: Fenghua Yu fenghua.yu@intel.com Cc: H. Peter Anvin hpa@zytor.com Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Matthew Whitehead tedheadster@gmail.com Cc: Oleg Nesterov oleg@redhat.com Cc: One Thousand Gnomes gnomes@lxorguk.ukuu.org.uk Cc: Peter Zijlstra peterz@infradead.org Cc: Rik van Riel riel@redhat.com Cc: Thomas Gleixner tglx@linutronix.de Cc: Yu-cheng Yu yu-cheng.yu@intel.com Link: http://lkml.kernel.org/r/623ff7555488122143e4417de09b18be2085ad06.1484705016... Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- arch/x86/kernel/cpu/common.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-)
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index f5647d238337..c4681f3461a1 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -666,6 +666,16 @@ void cpu_detect(struct cpuinfo_x86 *c) } }
+static void apply_forced_caps(struct cpuinfo_x86 *c) +{ + int i; + + for (i = 0; i < NCAPINTS; i++) { + c->x86_capability[i] &= ~cpu_caps_cleared[i]; + c->x86_capability[i] |= cpu_caps_set[i]; + } +} + void get_cpu_cap(struct cpuinfo_x86 *c) { u32 tfms, xlvl; @@ -957,11 +967,8 @@ static void identify_cpu(struct cpuinfo_x86 *c) if (this_cpu->c_identify) this_cpu->c_identify(c);
- /* Clear/Set all flags overriden by options, after probe */ - for (i = 0; i < NCAPINTS; i++) { - c->x86_capability[i] &= ~cpu_caps_cleared[i]; - c->x86_capability[i] |= cpu_caps_set[i]; - } + /* Clear/Set all flags overridden by options, after probe */ + apply_forced_caps(c);
#ifdef CONFIG_X86_64 c->apicid = apic->phys_pkg_id(c->initial_apicid, 0); @@ -1022,10 +1029,7 @@ static void identify_cpu(struct cpuinfo_x86 *c) * Clear/Set all flags overriden by options, need do it * before following smp all cpus cap AND. */ - for (i = 0; i < NCAPINTS; i++) { - c->x86_capability[i] &= ~cpu_caps_cleared[i]; - c->x86_capability[i] |= cpu_caps_set[i]; - } + apply_forced_caps(c);
/* * On SMP, boot_cpu_data holds the common feature set between