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(op: 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: &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, arg: &memmap); |
69 | if (rc) { |
70 | xen_raw_printk(fmt: "XENMEM_memory_map failed (%d)\n" , rc); |
71 | BUG(); |
72 | } |
73 | boot_params_p->e820_entries = memmap.nr_entries; |
74 | } |
75 | |