qemu/hw/core/guest-loader.h
Alex Bennée a33ff6d2c6 hw/core: implement a guest-loader to support static hypervisor guests
Hypervisors, especially type-1 ones, need the firmware/bootcode to put
their initial guest somewhere in memory and pass the information to it
via platform data. The guest-loader is modelled after the generic
loader for exactly this sort of purpose:

  $QEMU $ARGS  -kernel ~/xen.git/xen/xen \
    -append "dom0_mem=1G,max:1G loglvl=all guest_loglvl=all" \
    -device guest-loader,addr=0x42000000,kernel=Image,bootargs="root=/dev/sda2 ro console=hvc0 earlyprintk=xen" \
    -device guest-loader,addr=0x47000000,initrd=rootfs.cpio

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210303173642.3805-5-alex.bennee@linaro.org>
2021-03-10 15:34:11 +00:00

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/*
* Guest Loader
*
* Copyright (C) 2020 Linaro
* Written by Alex Bennée <alex.bennee@linaro.org>
* (based on the generic-loader by Li Guang <lig.fnst@cn.fujitsu.com>)
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef GUEST_LOADER_H
#define GUEST_LOADER_H
#include "hw/qdev-core.h"
#include "qom/object.h"
struct GuestLoaderState {
/* <private> */
DeviceState parent_obj;
/* <public> */
uint64_t addr;
char *kernel;
char *args;
char *initrd;
};
#define TYPE_GUEST_LOADER "guest-loader"
OBJECT_DECLARE_SIMPLE_TYPE(GuestLoaderState, GUEST_LOADER)
#endif