1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/acpi.h> 3 4 #include <xen/hvc-console.h> 5 6 #include <asm/io_apic.h> 7 #include <asm/hypervisor.h> 8 #include <asm/e820/api.h> 9 10 #include <xen/xen.h> 11 #include <asm/xen/interface.h> 12 #include <asm/xen/hypercall.h> 13 14 #include <xen/interface/memory.h> 15 16 #include "xen-ops.h" 17 18 /* 19 * PVH variables. 20 * 21 * The variable xen_pvh needs to live in the data segment since it is used 22 * after startup_{32|64} is invoked, which will clear the .bss segment. 23 */ 24 bool xen_pvh __attribute__((section(".data"))) = 0; 25 26 void __init xen_pvh_init(struct boot_params *boot_params) 27 { 28 u32 msr; 29 u64 pfn; 30 31 xen_pvh = 1; 32 xen_domain_type = XEN_HVM_DOMAIN; 33 xen_start_flags = pvh_start_info.flags; 34 35 msr = cpuid_ebx(xen_cpuid_base() + 2); 36 pfn = __pa(hypercall_page); 37 wrmsr_safe(msr, (u32)pfn, (u32)(pfn >> 32)); 38 39 xen_efi_init(boot_params); 40 } 41 42 void __init mem_map_via_hcall(struct boot_params *boot_params_p) 43 { 44 struct xen_memory_map memmap; 45 int rc; 46 47 memmap.nr_entries = ARRAY_SIZE(boot_params_p->e820_table); 48 set_xen_guest_handle(memmap.buffer, boot_params_p->e820_table); 49 rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap); 50 if (rc) { 51 xen_raw_printk("XENMEM_memory_map failed (%d)\n", rc); 52 BUG(); 53 } 54 boot_params_p->e820_entries = memmap.nr_entries; 55 } 56