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-rw-r--r--arch/x86/mm/pageattr.c18
1 files changed, 2 insertions, 16 deletions
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index b6a4c638f086..bd9b0ac07352 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -319,26 +319,12 @@ static void cpa_flush_array(unsigned long *start, int numpages, int cache,
319 int in_flags, struct page **pages) 319 int in_flags, struct page **pages)
320{ 320{
321 unsigned int i, level; 321 unsigned int i, level;
322#ifdef CONFIG_PREEMPT
323 /*
324 * Avoid wbinvd() because it causes latencies on all CPUs,
325 * regardless of any CPU isolation that may be in effect.
326 *
327 * This should be extended for CAT enabled systems independent of
328 * PREEMPT because wbinvd() does not respect the CAT partitions and
329 * this is exposed to unpriviledged users through the graphics
330 * subsystem.
331 */
332 unsigned long do_wbinvd = 0;
333#else
334 unsigned long do_wbinvd = cache && numpages >= 1024; /* 4M threshold */
335#endif
336 322
337 BUG_ON(irqs_disabled() && !early_boot_irqs_disabled); 323 BUG_ON(irqs_disabled() && !early_boot_irqs_disabled);
338 324
339 on_each_cpu(__cpa_flush_all, (void *) do_wbinvd, 1); 325 flush_tlb_all();
340 326
341 if (!cache || do_wbinvd) 327 if (!cache)
342 return; 328 return;
343 329
344 /* 330 /*