From 13fac8226036456c15c517c1dd77be5109a61da2 Mon Sep 17 00:00:00 2001 From: Rik van Riel Date: Mon, 30 Dec 2024 12:53:08 -0500 Subject: x86/tlb: use INVLPGB in flush_tlb_all 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 --- arch/x86/mm/tlb.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -1045,6 +1045,12 @@ static void do_flush_tlb_all(void *info) void flush_tlb_all(void) { count_vm_tlb_event(NR_TLB_REMOTE_FLUSH); + if (cpu_feature_enabled(X86_FEATURE_INVLPGB)) { + guard(preempt)(); + invlpgb_flush_all(); + tlbsync(); + return; + } on_each_cpu(do_flush_tlb_all, NULL, 1); }