From: dv <dv@openbsd.org>
Date: Thu, 8 Aug 2024 15:57:22 +0000 (+0000)
Subject: Start wire_count for EPT pde pages at 1.
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=7287160d5d072b92cf7a8e3e07a4a6af3565955f;p=openbsd

Start wire_count for EPT pde pages at 1.

Corrects an off-by-one error that results in EPT pte's not being
removed properly.

ok mlarkin@
---

diff --git a/sys/arch/amd64/amd64/pmap.c b/sys/arch/amd64/amd64/pmap.c
index f8c4acea310..413a69c52b2 100644
--- a/sys/arch/amd64/amd64/pmap.c
+++ b/sys/arch/amd64/amd64/pmap.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pmap.c,v 1.170 2024/07/21 19:41:31 bluhm Exp $	*/
+/*	$OpenBSD: pmap.c,v 1.171 2024/08/08 15:57:22 dv Exp $	*/
 /*	$NetBSD: pmap.c,v 1.3 2003/05/08 18:13:13 thorpej Exp $	*/
 
 /*
@@ -2655,6 +2655,7 @@ pmap_enter_ept(struct pmap *pmap, paddr_t gpa, paddr_t hpa, vm_prot_t prot)
 		}
 		atomic_clearbits_int(&ptp->pg_flags, PG_BUSY);
 
+		ptp->wire_count = 1;
 		pptp->wire_count++;
 
 		npa = VM_PAGE_TO_PHYS(ptp);