From 6e64bebb6ff828f3f65be61b0563d9c5569625b2 Mon Sep 17 00:00:00 2001
From: Konstantin Belousov <kib@FreeBSD.org>
Date: Wed, 9 Sep 2020 21:01:36 +0000
Subject: [PATCH] amd64: report support for 1G superpages in getpagesizes(2).

Reviewed by:	markj
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D24652
---
 sys/amd64/amd64/pmap.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c
index 0ef96a29dd85..ddc012f04123 100644
--- a/sys/amd64/amd64/pmap.c
+++ b/sys/amd64/amd64/pmap.c
@@ -2382,6 +2382,11 @@ pmap_init(void)
 		KASSERT(MAXPAGESIZES > 1 && pagesizes[1] == 0,
 		    ("pmap_init: can't assign to pagesizes[1]"));
 		pagesizes[1] = NBPDR;
+		if ((amd_feature & AMDID_PAGE1GB) != 0) {
+			KASSERT(MAXPAGESIZES > 1 && pagesizes[2] == 0,
+			    ("pmap_init: can't assign to pagesizes[2]"));
+			pagesizes[2] = NBPDP;
+		}
 	}
 
 	/*