linux/arch/x86/platform/pvh/enlighten.c

// SPDX-License-Identifier: GPL-2.0
#include <linux/acpi.h>

#include <xen/hvc-console.h>

#include <asm/bootparam.h>
#include <asm/io_apic.h>
#include <asm/hypervisor.h>
#include <asm/e820/api.h>
#include <asm/x86_init.h>

#include <asm/xen/interface.h>

#include <xen/xen.h>
#include <xen/interface/hvm/start_info.h>

/*
 * PVH variables.
 *
 * pvh_bootparams and pvh_start_info need to live in a data segment since
 * they are used after startup_{32|64}, which clear .bss, are invoked.
 */
struct boot_params __initdata pvh_bootparams;
struct hvm_start_info __initdata pvh_start_info;

const unsigned int __initconst pvh_start_info_sz = …;

static u64 __init pvh_get_root_pointer(void)
{ … }

/*
 * Xen guests are able to obtain the memory map from the hypervisor via the
 * HYPERVISOR_memory_op hypercall.
 * If we are trying to boot a Xen PVH guest, it is expected that the kernel
 * will have been configured to provide an override for this routine to do
 * just that.
 */
void __init __weak mem_map_via_hcall(struct boot_params *ptr __maybe_unused)
{ … }

static void __init init_pvh_bootparams(bool xen_guest)
{ … }

/*
 * If we are trying to boot a Xen PVH guest, it is expected that the kernel
 * will have been configured to provide the required override for this routine.
 */
void __init __weak xen_pvh_init(struct boot_params *boot_params)
{ … }

static void __init hypervisor_specific_init(bool xen_guest)
{ … }

/*
 * This routine (and those that it might call) should not use
 * anything that lives in .bss since that segment will be cleared later.
 */
void __init xen_prepare_pvh(void)
{ … }