From b6755eabcc390c3107440e0847d06726c874bc1e Mon Sep 17 00:00:00 2001
From: Warner Losh <imp@FreeBSD.org>
Date: Fri, 3 Feb 2023 08:39:39 -0700
Subject: [PATCH] kboot: bi_loadsmap for amd64

Copy the EFI memory tables we were able to get into the MODINFOMD_SMAP
metadata area for the kernel.

Sponsored by:		Netflix
Reviewed by:		tsoome, kevans
Differential Revision:	https://reviews.freebsd.org/D38254
---
 stand/kboot/arch/amd64/load_addr.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/stand/kboot/arch/amd64/load_addr.c b/stand/kboot/arch/amd64/load_addr.c
index 528b4dba6758..4bd2a19dab48 100644
--- a/stand/kboot/arch/amd64/load_addr.c
+++ b/stand/kboot/arch/amd64/load_addr.c
@@ -160,3 +160,22 @@ kboot_get_phys_load_segment(void)
 	}
 	return (base_seg);
 }
+
+void
+bi_loadsmap(struct preloaded_file *kfp)
+{
+	struct bios_smap smap[32], *sm;
+	struct memory_segments *s;
+	int smapnum, len;
+
+	for (smapnum = 0; smapnum < min(32, nr_seg); smapnum++) {
+		sm = &smap[smapnum];
+		s = &segs[smapnum];
+		sm->base = s->start;
+		sm->length = s->end - s->start + 1;
+		sm->type = SMAP_TYPE_MEMORY;
+	}
+
+        len = smapnum * sizeof(struct bios_smap);
+        file_addmetadata(kfp, MODINFOMD_SMAP, len, &smap[0]);
+}