From 157edace4ad3f3703e858e4fdea3d77a0b1832e0 Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Fri, 24 May 2024 13:28:20 -0400
Subject: kernel/amd64: pmap: Fix check for listed CPUs
Only perform a TLB shootdown if the number of cores listed is greater
than one.
Signed-off-by: Ian Moffett <ian@osmora.org>
---
sys/arch/amd64/amd64/pmap.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sys/arch/amd64/amd64/pmap.c b/sys/arch/amd64/amd64/pmap.c
index 468cca4..6eca948 100644
--- a/sys/arch/amd64/amd64/pmap.c
+++ b/sys/arch/amd64/amd64/pmap.c
@@ -206,12 +206,12 @@ pmap_modify_tbl(struct vm_ctx *ctx, struct vas vas, vaddr_t va, size_t val)
tbl[pmap_get_level_index(1, va)] = val;
/*
- * Do TLB shootdown if CPUs are listed.
+ * Do TLB shootdown if multiple CPUs are listed.
*
* XXX: Some might not be listed during early
* startup.
*/
- if (cpu_get(0) != NULL) {
+ if (cpu_count() > 1) {
tlb_shootdown(va);
}
--
cgit v1.2.3