113 lines
3 KiB
C
113 lines
3 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
#include <linux/acpi.h>
|
||
|
|
|
||
|
|
#include <xen/hvc-console.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 <asm/xen/hypercall.h>
|
||
|
|
|
||
|
|
#include <xen/interface/memory.h>
|
||
|
|
#include <xen/interface/hvm/start_info.h>
|
||
|
|
|
||
|
|
#include "xen-ops.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
* PVH variables.
|
||
|
|
*
|
||
|
|
* xen_pvh pvh_bootparams and pvh_start_info need to live in data segment
|
||
|
|
* since they are used after startup_{32|64}, which clear .bss, are invoked.
|
||
|
|
*/
|
||
|
|
bool xen_pvh __attribute__((section(".data"))) = 0;
|
||
|
|
struct boot_params pvh_bootparams __attribute__((section(".data")));
|
||
|
|
struct hvm_start_info pvh_start_info __attribute__((section(".data")));
|
||
|
|
|
||
|
|
unsigned int pvh_start_info_sz = sizeof(pvh_start_info);
|
||
|
|
|
||
|
|
static u64 pvh_get_root_pointer(void)
|
||
|
|
{
|
||
|
|
return pvh_start_info.rsdp_paddr;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __init init_pvh_bootparams(void)
|
||
|
|
{
|
||
|
|
struct xen_memory_map memmap;
|
||
|
|
int rc;
|
||
|
|
|
||
|
|
memset(&pvh_bootparams, 0, sizeof(pvh_bootparams));
|
||
|
|
|
||
|
|
memmap.nr_entries = ARRAY_SIZE(pvh_bootparams.e820_table);
|
||
|
|
set_xen_guest_handle(memmap.buffer, pvh_bootparams.e820_table);
|
||
|
|
rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap);
|
||
|
|
if (rc) {
|
||
|
|
xen_raw_printk("XENMEM_memory_map failed (%d)\n", rc);
|
||
|
|
BUG();
|
||
|
|
}
|
||
|
|
pvh_bootparams.e820_entries = memmap.nr_entries;
|
||
|
|
|
||
|
|
if (pvh_bootparams.e820_entries < E820_MAX_ENTRIES_ZEROPAGE - 1) {
|
||
|
|
pvh_bootparams.e820_table[pvh_bootparams.e820_entries].addr =
|
||
|
|
ISA_START_ADDRESS;
|
||
|
|
pvh_bootparams.e820_table[pvh_bootparams.e820_entries].size =
|
||
|
|
ISA_END_ADDRESS - ISA_START_ADDRESS;
|
||
|
|
pvh_bootparams.e820_table[pvh_bootparams.e820_entries].type =
|
||
|
|
E820_TYPE_RESERVED;
|
||
|
|
pvh_bootparams.e820_entries++;
|
||
|
|
} else
|
||
|
|
xen_raw_printk("Warning: Can fit ISA range into e820\n");
|
||
|
|
|
||
|
|
pvh_bootparams.hdr.cmd_line_ptr =
|
||
|
|
pvh_start_info.cmdline_paddr;
|
||
|
|
|
||
|
|
/* The first module is always ramdisk. */
|
||
|
|
if (pvh_start_info.nr_modules) {
|
||
|
|
struct hvm_modlist_entry *modaddr =
|
||
|
|
__va(pvh_start_info.modlist_paddr);
|
||
|
|
pvh_bootparams.hdr.ramdisk_image = modaddr->paddr;
|
||
|
|
pvh_bootparams.hdr.ramdisk_size = modaddr->size;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* See Documentation/x86/boot.txt.
|
||
|
|
*
|
||
|
|
* Version 2.12 supports Xen entry point but we will use default x86/PC
|
||
|
|
* environment (i.e. hardware_subarch 0).
|
||
|
|
*/
|
||
|
|
pvh_bootparams.hdr.version = (2 << 8) | 12;
|
||
|
|
pvh_bootparams.hdr.type_of_loader = (9 << 4) | 0; /* Xen loader */
|
||
|
|
|
||
|
|
x86_init.acpi.get_root_pointer = pvh_get_root_pointer;
|
||
|
|
|
||
|
|
xen_efi_init(&pvh_bootparams);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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)
|
||
|
|
{
|
||
|
|
u32 msr;
|
||
|
|
u64 pfn;
|
||
|
|
|
||
|
|
if (pvh_start_info.magic != XEN_HVM_START_MAGIC_VALUE) {
|
||
|
|
xen_raw_printk("Error: Unexpected magic value (0x%08x)\n",
|
||
|
|
pvh_start_info.magic);
|
||
|
|
BUG();
|
||
|
|
}
|
||
|
|
|
||
|
|
xen_pvh = 1;
|
||
|
|
xen_domain_type = XEN_HVM_DOMAIN;
|
||
|
|
xen_start_flags = pvh_start_info.flags;
|
||
|
|
|
||
|
|
msr = cpuid_ebx(xen_cpuid_base() + 2);
|
||
|
|
pfn = __pa(hypercall_page);
|
||
|
|
wrmsr_safe(msr, (u32)pfn, (u32)(pfn >> 32));
|
||
|
|
|
||
|
|
init_pvh_bootparams();
|
||
|
|
}
|