[PATCH 05/10] x86,tlb: use INVLPGB in flush_tlb_all

[Rik van Riel]

The flush_tlb_all() function is not used a whole lot, but we might
as well use broadcast TLB flushing there, too.

Signed-off-by: Rik van Riel <riel@xxxxxxxxxxx>
---
 arch/x86/mm/tlb.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
index 09980fb17907..bf85cd0590d5 100644
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -1074,6 +1074,11 @@ static void do_flush_tlb_all(void *info)
 void flush_tlb_all(void)
 {
 	count_vm_tlb_event(NR_TLB_REMOTE_FLUSH);
+	if (static_cpu_has(X86_FEATURE_INVLPGB)) {
+		invlpgb_flush_all();
+		tlbsync();
+		return;
+	}
 	on_each_cpu(do_flush_tlb_all, NULL, 1);
 }
 
-- 
2.47.1