git: bc7f6508363c - main - smbios: Search for v3 (64-bit) entry point first on BIOS boot

The branch main has been updated by olce:

URL: https://cgit.FreeBSD.org/src/commit/?id=bc7f6508363c5cf4544044e00bbaf71de8f0168d

commit bc7f6508363c5cf4544044e00bbaf71de8f0168d
Author:     Olivier Certner <olce@FreeBSD.org>
AuthorDate: 2025-02-28 16:54:42 +0000
Commit:     Olivier Certner <olce@FreeBSD.org>
CommitDate: 2025-03-07 16:42:45 +0000

    smbios: Search for v3 (64-bit) entry point first on BIOS boot
    
    When booted from BIOS (i.e., not EFI), also search for a 64-bit version
    of the SMBIOS Entry Point.
    
    This allows us to detect and report the proper SMBIOS version with
    BIOSes that only provide the v3 table, as happens on Hetzner virtual
    machines.
    
    For machines that provide both, leverage the v3 table in priority
    consistently with the EFI case.
    
    PR:             284460
    Reviewed by:    markj, imp (both older version)
    MFC after:      2 weeks
    Relnotes:       yes
    Event:          February src bug-busting session
    Sponsored by:   The FreeBSD Foundation
    Differential Revision:  https://reviews.freebsd.org/D49179
---
 sys/dev/smbios/smbios.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/sys/dev/smbios/smbios.c b/sys/dev/smbios/smbios.c
index bbfe80a6a8a6..f4a6453fd043 100644
--- a/sys/dev/smbios/smbios.c
+++ b/sys/dev/smbios/smbios.c
@@ -102,9 +102,15 @@ smbios_identify (driver_t *driver, device_t parent)
 #endif
 
 #if defined(__amd64__) || defined(__i386__)
-	if (addr == 0)
-		addr = bios_sigsearch(SMBIOS_START, SMBIOS_SIG, SMBIOS_LEN,
+	if (addr == 0) {
+		addr = bios_sigsearch(SMBIOS_START, SMBIOS3_SIG, SMBIOS3_LEN,
 		    SMBIOS_STEP, SMBIOS_OFF);
+		if (addr != 0)
+			map_size = sizeof(*eps3);
+		else
+			addr = bios_sigsearch(SMBIOS_START,
+			    SMBIOS_SIG, SMBIOS_LEN, SMBIOS_STEP, SMBIOS_OFF);
+	}
 #endif
 
 	if (addr != 0) {