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[releases.git] / x86 / xen / enlighten_pvh.c
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  */
25 bool __ro_after_init xen_pvh;
26 EXPORT_SYMBOL_GPL(xen_pvh);
27
28 void __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
61 void __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 }