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/bootparam.h> 8 #include <asm/io_apic.h> 9 #include <asm/hypervisor.h> 10 #include <asm/e820/api.h> 11 12 #include <xen/xen.h> 13 #include <asm/xen/interface.h> 14 #include <asm/xen/hypercall.h> 15 16 #include <xen/interface/memory.h> 17 18 #include "xen-ops.h" 19 20 /* 21 * PVH variables. 22 * 23 * The variable xen_pvh needs to live in a data segment since it is used 24 * after startup_{32|64} is invoked, which will clear the .bss segment. 25 */ 26 bool __ro_after_init xen_pvh; 27 EXPORT_SYMBOL_GPL(xen_pvh); 28 29 void __init xen_pvh_init(struct boot_params *boot_params) 30 { 31 u32 msr; 32 u64 pfn; 33 34 xen_pvh = 1; 35 xen_domain_type = XEN_HVM_DOMAIN; 36 xen_start_flags = pvh_start_info.flags; 37 38 msr = cpuid_ebx(xen_cpuid_base() + 2); 39 pfn = __pa(hypercall_page); 40 wrmsr_safe(msr, (u32)pfn, (u32)(pfn >> 32)); 41 42 if (xen_initial_domain()) 43 x86_init.oem.arch_setup = xen_add_preferred_consoles; 44 x86_init.oem.banner = xen_banner; 45 46 xen_efi_init(boot_params); 47 48 if (xen_initial_domain()) { 49 struct xen_platform_op op = { 50 .cmd = XENPF_get_dom0_console, 51 }; 52 int ret = HYPERVISOR_platform_op(&op); 53 54 if (ret > 0) 55 xen_init_vga(&op.u.dom0_console, 56 min(ret * sizeof(char), 57 sizeof(op.u.dom0_console)), 58 &boot_params->screen_info); 59 } 60 } 61 62 void __init mem_map_via_hcall(struct boot_params *boot_params_p) 63 { 64 struct xen_memory_map memmap; 65 int rc; 66 67 memmap.nr_entries = ARRAY_SIZE(boot_params_p->e820_table); 68 set_xen_guest_handle(memmap.buffer, boot_params_p->e820_table); 69 rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap); 70 if (rc) { 71 xen_raw_printk("XENMEM_memory_map failed (%d)\n", rc); 72 BUG(); 73 } 74 boot_params_p->e820_entries = memmap.nr_entries; 75 } 76