diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2018-09-19 10:50:24 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-09-27 20:39:42 +0200 |
| commit | 7904ba8a66f400182a204893c92098994e22a88d (patch) | |
| tree | 5364759f89275e6b6ab95586301dc9b2bb265b16 /arch/x86/mm/pageattr.c | |
| parent | 47e262ac5b84015c4a101ff51767c464fb7497a6 (diff) | |
x86/mm/cpa: Optimize __cpa_flush_range()
If we IPI for WBINDV, then we might as well kill the entire TLB too.
But if we don't have to invalidate cache, there is no reason not to
use a range TLB flush.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Dave Hansen <dave.hansen@intel.com>
Cc: Bin Yang <bin.yang@intel.com>
Cc: Mark Gross <mark.gross@intel.com>
Link: https://lkml.kernel.org/r/20180919085948.195633798@infradead.org
Diffstat (limited to 'arch/x86/mm/pageattr.c')
| -rw-r--r-- | arch/x86/mm/pageattr.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c index dc552824e86a..62bb30b4bd2a 100644 --- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -291,7 +291,7 @@ static bool __cpa_flush_range(unsigned long start, int numpages, int cache) WARN_ON(PAGE_ALIGN(start) != start); - if (!static_cpu_has(X86_FEATURE_CLFLUSH)) { + if (cache && !static_cpu_has(X86_FEATURE_CLFLUSH)) { cpa_flush_all(cache); return true; } |