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 */ 25 bool __ro_after_init xen_pvh; 26 EXPORT_SYMBOL_GPL(xen_pvh); 27 28 void __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 if (xen_initial_domain()) { 48 struct xen_platform_op op = { 49 .cmd = XENPF_get_dom0_console, 50 }; 51 int ret = HYPERVISOR_platform_op(&op); 52 53 if (ret > 0) 54 xen_init_vga(&op.u.dom0_console, 55 min(ret * sizeof(char), 56 sizeof(op.u.dom0_console)), 57 &boot_params->screen_info); 58 } 59 } 60 61 void __init mem_map_via_hcall(struct boot_params *boot_params_p) 62 { 63 struct xen_memory_map memmap; 64 int rc; 65 66 memmap.nr_entries = ARRAY_SIZE(boot_params_p->e820_table); 67 set_xen_guest_handle(memmap.buffer, boot_params_p->e820_table); 68 rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap); 69 if (rc) { 70 xen_raw_printk("XENMEM_memory_map failed (%d)\n", rc); 71 BUG(); 72 } 73 boot_params_p->e820_entries = memmap.nr_entries; 74 } 75