x86/cr4: Sanitize CR4.PCE update

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load_mm_cr4_irqsoff() is really a strange name for a function which has
only one purpose: Update the CR4.PCE bit depending on the perf state.

Rename it to update_cr4_pce_mm(), move it into the tlb code and provide a
function which can be invoked by the perf smp function calls.

Another step to remove exposure of cpu_tlbstate.

No functional change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200421092559.049499158@linutronix.de

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Thomas Gleixner 2020-04-21 11:20:30 +02:00 • committed by Borislav Petkov

parent d8f0b35331

commit cb2a02355b

3 changed files with 25 additions and 22 deletions

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11

arch/x86/events/core.c

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14

arch/x86/include/asm/mmu_context.h

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22

arch/x86/mm/tlb.c

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