1// SPDX-License-Identifier: GPL-2.0
2#include <linux/acpi.h>
3#include <linux/export.h>
4
5#include <xen/hvc-console.h>
6
7#include <asm/io_apic.h>
8#include <asm/hypervisor.h>
9#include <asm/e820/api.h>
10
11#include <xen/xen.h>
12#include <asm/xen/interface.h>
13#include <asm/xen/hypercall.h>
14
15#include <xen/interface/memory.h>
16
17#include "xen-ops.h"
18
19/*
20 * PVH variables.
21 *
22 * The variable xen_pvh needs to live in a data segment since it is used
23 * after startup_{32|64} is invoked, which will clear the .bss segment.
24 */
25bool __ro_after_init xen_pvh;
26EXPORT_SYMBOL_GPL(xen_pvh);
27
28void __init xen_pvh_init(struct boot_params *boot_params)
29{
30	u32 msr;
31	u64 pfn;
32
33	xen_pvh = 1;
34	xen_domain_type = XEN_HVM_DOMAIN;
35	xen_start_flags = pvh_start_info.flags;
36
37	msr = cpuid_ebx(xen_cpuid_base() + 2);
38	pfn = __pa(hypercall_page);
39	wrmsr_safe(msr, (u32)pfn, (u32)(pfn >> 32));
40
41	if (xen_initial_domain())
42		x86_init.oem.arch_setup = xen_add_preferred_consoles;
43	x86_init.oem.banner = xen_banner;
44
45	xen_efi_init(boot_params);
46
47	if (xen_initial_domain()) {
48		struct xen_platform_op op = {
49			.cmd = XENPF_get_dom0_console,
50		};
51		int ret = HYPERVISOR_platform_op(&op);
52
53		if (ret > 0)
54			xen_init_vga(&op.u.dom0_console,
55				     min(ret * sizeof(char),
56					 sizeof(op.u.dom0_console)),
57				     &boot_params->screen_info);
58	}
59}
60
61void __init mem_map_via_hcall(struct boot_params *boot_params_p)
62{
63	struct xen_memory_map memmap;
64	int rc;
65
66	memmap.nr_entries = ARRAY_SIZE(boot_params_p->e820_table);
67	set_xen_guest_handle(memmap.buffer, boot_params_p->e820_table);
68	rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap);
69	if (rc) {
70		xen_raw_printk("XENMEM_memory_map failed (%d)\n", rc);
71		BUG();
72	}
73	boot_params_p->e820_entries = memmap.nr_entries;
74}
75