1 #include <linux/acpi.h>
3 #include <xen/hvc-console.h>
5 #include <asm/io_apic.h>
6 #include <asm/hypervisor.h>
7 #include <asm/e820/api.h>
9 #include <asm/xen/interface.h>
10 #include <asm/xen/hypercall.h>
12 #include <xen/interface/memory.h>
13 #include <xen/interface/hvm/start_info.h>
18 * xen_pvh and pvh_bootparams need to live in data segment since they
19 * are used after startup_{32|64}, which clear .bss, are invoked.
21 bool xen_pvh
__attribute__((section(".data"))) = 0;
22 struct boot_params pvh_bootparams
__attribute__((section(".data")));
24 struct hvm_start_info pvh_start_info
;
25 unsigned int pvh_start_info_sz
= sizeof(pvh_start_info
);
27 static void xen_pvh_arch_setup(void)
29 /* Make sure we don't fall back to (default) ACPI_IRQ_MODEL_PIC. */
31 acpi_irq_model
= ACPI_IRQ_MODEL_PLATFORM
;
34 static void __init
init_pvh_bootparams(void)
36 struct xen_memory_map memmap
;
39 memset(&pvh_bootparams
, 0, sizeof(pvh_bootparams
));
41 memmap
.nr_entries
= ARRAY_SIZE(pvh_bootparams
.e820_table
);
42 set_xen_guest_handle(memmap
.buffer
, pvh_bootparams
.e820_table
);
43 rc
= HYPERVISOR_memory_op(XENMEM_memory_map
, &memmap
);
45 xen_raw_printk("XENMEM_memory_map failed (%d)\n", rc
);
48 pvh_bootparams
.e820_entries
= memmap
.nr_entries
;
50 if (pvh_bootparams
.e820_entries
< E820_MAX_ENTRIES_ZEROPAGE
- 1) {
51 pvh_bootparams
.e820_table
[pvh_bootparams
.e820_entries
].addr
=
53 pvh_bootparams
.e820_table
[pvh_bootparams
.e820_entries
].size
=
54 ISA_END_ADDRESS
- ISA_START_ADDRESS
;
55 pvh_bootparams
.e820_table
[pvh_bootparams
.e820_entries
].type
=
57 pvh_bootparams
.e820_entries
++;
59 xen_raw_printk("Warning: Can fit ISA range into e820\n");
61 pvh_bootparams
.hdr
.cmd_line_ptr
=
62 pvh_start_info
.cmdline_paddr
;
64 /* The first module is always ramdisk. */
65 if (pvh_start_info
.nr_modules
) {
66 struct hvm_modlist_entry
*modaddr
=
67 __va(pvh_start_info
.modlist_paddr
);
68 pvh_bootparams
.hdr
.ramdisk_image
= modaddr
->paddr
;
69 pvh_bootparams
.hdr
.ramdisk_size
= modaddr
->size
;
73 * See Documentation/x86/boot.txt.
75 * Version 2.12 supports Xen entry point but we will use default x86/PC
76 * environment (i.e. hardware_subarch 0).
78 pvh_bootparams
.hdr
.version
= 0x212;
79 pvh_bootparams
.hdr
.type_of_loader
= (9 << 4) | 0; /* Xen loader */
83 * This routine (and those that it might call) should not use
84 * anything that lives in .bss since that segment will be cleared later.
86 void __init
xen_prepare_pvh(void)
91 if (pvh_start_info
.magic
!= XEN_HVM_START_MAGIC_VALUE
) {
92 xen_raw_printk("Error: Unexpected magic value (0x%08x)\n",
93 pvh_start_info
.magic
);
99 msr
= cpuid_ebx(xen_cpuid_base() + 2);
100 pfn
= __pa(hypercall_page
);
101 wrmsr_safe(msr
, (u32
)pfn
, (u32
)(pfn
>> 32));
103 init_pvh_bootparams();
105 x86_init
.oem
.arch_setup
= xen_pvh_arch_setup
;