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 /* 17 * PVH variables. 18 * 19 * The variable xen_pvh needs to live in the data segment since it is used 20 * after startup_{32|64} is invoked, which will clear the .bss segment. 21 */ 22 bool xen_pvh __attribute__((section(".data"))) = 0; 23 24 void __init xen_pvh_init(void) 25 { 26 u32 msr; 27 u64 pfn; 28 29 xen_pvh = 1; 30 xen_start_flags = pvh_start_info.flags; 31 32 msr = cpuid_ebx(xen_cpuid_base() + 2); 33 pfn = __pa(hypercall_page); 34 wrmsr_safe(msr, (u32)pfn, (u32)(pfn >> 32)); 35 } 36 37 void __init mem_map_via_hcall(struct boot_params *boot_params_p) 38 { 39 struct xen_memory_map memmap; 40 int rc; 41 42 memmap.nr_entries = ARRAY_SIZE(boot_params_p->e820_table); 43 set_xen_guest_handle(memmap.buffer, boot_params_p->e820_table); 44 rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap); 45 if (rc) { 46 xen_raw_printk("XENMEM_memory_map failed (%d)\n", rc); 47 BUG(); 48 } 49 boot_params_p->e820_entries = memmap.nr_entries; 50 } 51