tools: support SeaBIOS. Use by default when upstream qemu is configured.

The SeaBIOS integration here is only semi-complete and is targetted at
developers and very early adopters who can be expected to cope with
some rough edges. In particular the user must clone, patch as
necessary and compile SeaBIOS themselves since this patchset does not
cover any of that (in the same way we currently do not integrate
upstream qemu clone+build). Include a big comment to that effect next
to the Config.mk option.

Many of the bios_config callback functions are not yet used by
SeaBIOS.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson.citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>

Config.mk

@@ -184,6 +184,18 @@ QEMU_TAG := xen-4.1.0-rc6
 # Fri Feb 11 17:54:51 2011 +0000
 # qemu-xen: fix segfault with empty cdroms
 
+# Short answer -- do not enable this unless you know what you are
+# doing and are prepared for some pain.
+
+# SeaBIOS integration is a work in progress. Before enabling this
+# option you must clone git://git.qemu.org/seabios.git/, possibly add
+# some development patches and then build it yourself before pointing
+# this variable to it (using an absolute path).
+#
+# Note that using SeaBIOS requires the use the upstream qemu as the
+# device model.
+SEABIOS_DIR ?= 
+
 # Optional components
 XENSTAT_XENTOP     ?= y
 VTPM_TOOLS         ?= n

tools/firmware/hvmloader/Makefile

@@ -40,9 +40,16 @@ CIRRUSVGA_DEBUG ?= n
 ROMBIOS_DIR := ../rombios
 ifneq ($(ROMBIOS_DIR),)
 OBJS += rombios.o
+CFLAGS += -DENABLE_ROMBIOS
 ROMBIOS_ROM := $(ROMBIOS_DIR)/BIOS-bochs-latest
 endif
 
+ifneq ($(SEABIOS_DIR),)
+OBJS += seabios.o
+CFLAGS += -DENABLE_SEABIOS
+SEABIOS_ROM := $(SEABIOS_DIR)/out/bios.bin
+endif
+
 STDVGA_ROM    := ../vgabios/VGABIOS-lgpl-latest.bin
 ifeq ($(CIRRUSVGA_DEBUG),y)
 CIRRUSVGA_ROM := ../vgabios/VGABIOS-lgpl-latest.cirrus.debug.bin
@@ -54,7 +61,7 @@ endif
 all: subdirs-all
 	$(MAKE) hvmloader
 
-rombios.o hvmloader.o: roms.inc
+rombios.o seabios.o hvmloader.o: roms.inc
 smbios.o: CFLAGS += -D__SMBIOS_DATE__="\"$(shell date +%m/%d/%Y)\""
 
 hvmloader: $(OBJS) acpi/acpi.a
@@ -62,7 +69,7 @@ hvmloader: $(OBJS) acpi/acpi.a
 	$(OBJCOPY) hvmloader.tmp hvmloader
 	rm -f hvmloader.tmp
 
-roms.inc: $(ROMBIOS_ROM) $(STDVGA_ROM) $(CIRRUSVGA_ROM) ../etherboot/eb-roms.h
+roms.inc: $(ROMBIOS_ROM) $(SEABIOS_ROM) $(STDVGA_ROM) $(CIRRUSVGA_ROM) ../etherboot/eb-roms.h
 	echo "/* Autogenerated file. DO NOT EDIT */" > $@.new
 
 ifneq ($(ROMBIOS_ROM),)
@@ -71,6 +78,12 @@ ifneq ($(ROMBIOS_ROM),)
 	echo "#endif" >> $@.new
 endif
 
+ifneq ($(SEABIOS_ROM),)
+	echo "#ifdef ROM_INCLUDE_SEABIOS" >> $@.new
+	sh ./mkhex seabios $(SEABIOS_ROM) >> $@.new
+	echo "#endif" >> $@.new
+endif
+
 ifneq ($(STDVGA_ROM),)
 	echo "#ifdef ROM_INCLUDE_VGABIOS" >> $@.new
 	sh ./mkhex vgabios_stdvga $(STDVGA_ROM) >> $@.new

tools/firmware/hvmloader/config-seabios.h

@@ -0,0 +1,9 @@
+#ifndef __HVMLOADER_CONFIG_SEABIOS_H__
+#define __HVMLOADER_CONFIG_SEABIOS_H__
+
+#define OPTIONROM_PHYSICAL_ADDRESS  0x000C8000
+#define OPTIONROM_PHYSICAL_END      0x000E0000
+
+#define SEABIOS_PHYSICAL_ADDRESS    0x000E0000
+
+#endif /* __HVMLOADER_CONFIG_SEABIOS_H__ */

tools/firmware/hvmloader/config.h

@@ -40,6 +40,7 @@ struct bios_config {
 };
 
 extern struct bios_config rombios_config;
+extern struct bios_config seabios_config;
 
 #define PAGE_SHIFT 12
 #define PAGE_SIZE  (1ul << PAGE_SHIFT)

tools/firmware/hvmloader/hvmloader.c

@@ -341,7 +341,12 @@ struct bios_info {
     const char *key;
     const struct bios_config *bios;
 } bios_configs[] = {
+#ifdef ENABLE_ROMBIOS
     { "rombios", &rombios_config, },
+#endif
+#ifdef ENABLE_SEABIOS
+    { "seabios", &seabios_config, },
+#endif
     { NULL, NULL }
 };
 

tools/firmware/hvmloader/seabios.c

@@ -0,0 +1,75 @@
+/*
+ * HVM SeaBIOS support.
+ *
+ * Leendert van Doorn, leendert@watson.ibm.com
+ * Copyright (c) 2005, International Business Machines Corporation.
+ * Copyright (c) 2006, Keir Fraser, XenSource Inc.
+ * Copyright (c) 2011, Citrix Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "config.h"
+#include "config-seabios.h"
+
+#include "util.h"
+
+#define ROM_INCLUDE_SEABIOS
+#include "roms.inc"
+
+static void seabios_pci_setup(void)
+{
+    virtual_vga = VGA_cirrus;
+}
+
+//BUILD_BUG_ON(sizeof(seabios) > (0x00100000U - SEABIOS_PHYSICAL_ADDRESS));
+
+struct bios_config seabios_config = {
+	.name = "SeaBIOS",
+
+    .image = seabios,
+    .image_size = sizeof(seabios),
+
+    .bios_address = SEABIOS_PHYSICAL_ADDRESS,
+
+    .smbios_start = 0,
+    .smbios_end = 0,
+
+    .optionrom_start = OPTIONROM_PHYSICAL_ADDRESS,
+    .optionrom_end = OPTIONROM_PHYSICAL_END,
+
+    .acpi_start = 0,
+
+    .bios_info_setup = NULL,
+
+    .apic_setup = NULL,
+    .pci_setup = seabios_pci_setup,
+    .smp_setup = NULL,
+
+    .vm86_setup = NULL,
+    .e820_setup = NULL,
+
+    .acpi_build_tables = NULL,
+    .create_mp_tables = NULL,
+};
+
+/*
+ * Local variables:
+ * mode: C
+ * c-set-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */

tools/libxl/libxl_dm.c

@@ -65,7 +65,6 @@ const char *libxl__domain_device_model(libxl__gc *gc,
             break;
         }
     }
-
     return dm;
 }
 
@@ -74,7 +73,7 @@ static char *libxl__domain_bios(libxl__gc *gc,
 {
     switch (info->device_model_version) {
     case 1: return libxl__strdup(gc, "rombios");
-    case 2: return libxl__strdup(gc, "rombios");
+    case 2: return libxl__strdup(gc, "seabios");
     default:return NULL;
     }
 }