From c3e9ce3312e8bd27c01e00889f1a07bc630e26fc Mon Sep 17 00:00:00 2001
From: Neel Natu <neel@FreeBSD.org>
Date: Tue, 6 Nov 2012 21:48:45 +0000
Subject: [PATCH] Use the new userboot 'getenv' callback to set a couple of
 environment variables in the guest.

The variables are: smbios.bios.vendor=BHYVE and boot_serial=1

The FreeBSD guest uses the "smbios.bios.vendor" environment variable to
detect whether or not it is running as a guest inside a hypervisor.

The "boot_serial=1" is temporary and will be dropped when bhyve can do VGA
emulation.

Obtained from:	NetApp
---
 usr.sbin/bhyveload/bhyveload.c | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/usr.sbin/bhyveload/bhyveload.c b/usr.sbin/bhyveload/bhyveload.c
index b8be5e3beff..3b7fad4850d 100644
--- a/usr.sbin/bhyveload/bhyveload.c
+++ b/usr.sbin/bhyveload/bhyveload.c
@@ -471,6 +471,25 @@ cb_getmem(void *arg, uint64_t *ret_lowmem, uint64_t *ret_highmem)
 	*ret_highmem = highmem;
 }
 
+static const char *
+cb_getenv(void *arg, int num)
+{
+	int max;
+
+	static const char * var[] = {
+		"smbios.bios.vendor=BHYVE",
+		"boot_serial=1",
+		NULL
+	};
+
+	max = sizeof(var) / sizeof(var[0]);
+
+	if (num < max)
+		return (var[num]);
+	else
+		return (NULL);
+}
+
 static struct loader_callbacks_v1 cb = {
 	.getc = cb_getc,
 	.putc = cb_putc,
@@ -497,6 +516,8 @@ static struct loader_callbacks_v1 cb = {
 	.delay = cb_delay,
 	.exit = cb_exit,
 	.getmem = cb_getmem,
+
+	.getenv = cb_getenv,
 };
 
 static void
@@ -600,5 +621,5 @@ main(int argc, char** argv)
 	if (disk_image) {
 		disk_fd = open(disk_image, O_RDONLY);
 	}
-	func(&cb, NULL, USERBOOT_VERSION_1, disk_fd >= 0);
+	func(&cb, NULL, USERBOOT_VERSION_3, disk_fd >= 0);
 }