LXR linux/arch/x86/xen/enlighten

   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
  48void __init mem_map_via_hcall(struct boot_params *boot_params_p)
  49{
  50        struct xen_memory_map memmap;
  51        int rc;
  52
  53        memmap.nr_entries = ARRAY_SIZE(boot_params_p->e820_table);
  54        set_xen_guest_handle(memmap.buffer, boot_params_p->e820_table);
  55        rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap);
  56        if (rc) {
  57                xen_raw_printk("XENMEM_memory_map failed (%d)\n", rc);
  58                BUG();
  59        }
  60        boot_params_p->e820_entries = memmap.nr_entries;
  61}
  62