From 13b17acc5505236b68fed50ff75dc9fdb70d3706 Mon Sep 17 00:00:00 2001
From: Mark Kettenis <kettenis@openbsd.org>
Date: Fri, 12 Jan 2024 21:40:39 +0100
Subject: [PATCH] kboot: Add SMBIOS information for U-Boot

Signed-off-by: Mark Kettenis <kettenis@openbsd.org>
---
 src/kboot.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/src/kboot.c b/src/kboot.c
index a0656dc74..0cb732e15 100644
--- a/src/kboot.c
+++ b/src/kboot.c
@@ -349,6 +349,52 @@ static int dt_set_serial_number(void)
     return 0;
 }
 
+static int dt_set_smbios(void)
+{
+    int fdt_root = fdt_path_offset(dt, "/");
+    int len, node, smbios_node;
+
+    if (fdt_root < 0)
+        bail("FDT: could not open a handle to FDT root.\n");
+
+    node = fdt_add_subnode(dt, fdt_root, "smbios");
+    if (node < 0)
+        bail("FDT: failed to add node 'smbios' to  '/'\n");
+    fdt_setprop_string(dt, node, "compatible", "u-boot,sysinfo-smbios");
+
+    smbios_node = fdt_add_subnode(dt, node, "smbios");
+    if (smbios_node < 0)
+        bail("FDT: failed to add node 'smbios' to  '/smbios'\n");
+
+    node = fdt_add_subnode(dt, smbios_node, "system");
+    if (node < 0)
+        bail("FDT: failed to add node 'system' to  '/smbios'\n");
+    fdt_setprop_string(dt, node, "manufacturer", "Apple");
+    const char *model = fdt_getprop(dt, fdt_root, "model", &len);
+    if (!model)
+	bail("FDT: failed to get model property\n");
+    if (len < 6)
+	fdt_setprop_string(dt, node, "product", "Unknown");
+    else
+	fdt_setprop_string(dt, node, "product", model + 6);
+
+    node = fdt_add_subnode(dt, smbios_node, "baseboard");
+    if (node < 0)
+        bail("FDT: failed to add node 'baseboard' to  '/smbios'\n");
+    fdt_setprop_string(dt, node, "manufacturer", "Apple");
+    const char *target_type = adt_getprop(adt, 0, "target-type", NULL);
+    if (!target_type)
+	bail("ADT: failed to get target-type property\n");
+    fdt_setprop_string(dt, node, "product", target_type);
+
+    node = fdt_add_subnode(dt, smbios_node, "chassis");
+    if (node < 0)
+        bail("FDT: failed to add node 'chassis' to  '/smbios'\n");
+    fdt_setprop_string(dt, node, "manufacturer", "Apple");
+
+    return 0;
+}
+
 static int dt_set_cpus(void)
 {
     int ret = 0;
@@ -2266,6 +2312,8 @@ int kboot_prepare_dt(void *fdt)
         return -1;
     if (dt_set_serial_number())
         return -1;
+    if (dt_set_smbios())
+	return -1;
     if (dt_set_cpus())
         return -1;
     if (dt_set_mac_addresses())