1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef XEN_OPS_H 3#define XEN_OPS_H 4 5#include <linux/init.h> 6#include <linux/clocksource.h> 7#include <linux/irqreturn.h> 8#include <xen/xen-ops.h> 9 10/* These are code, but not functions. Defined in entry.S */ 11extern const char xen_failsafe_callback[]; 12 13void xen_entry_SYSENTER_compat(void); 14#ifdef CONFIG_X86_64 15void xen_entry_SYSCALL_64(void); 16void xen_entry_SYSCALL_compat(void); 17#endif 18 19extern void *xen_initial_gdt; 20 21struct trap_info; 22void xen_copy_trap_info(struct trap_info *traps); 23 24DECLARE_PER_CPU_ALIGNED(struct vcpu_info, xen_vcpu_info); 25DECLARE_PER_CPU(unsigned long, xen_cr3); 26DECLARE_PER_CPU(unsigned long, xen_current_cr3); 27 28extern struct start_info *xen_start_info; 29extern struct shared_info xen_dummy_shared_info; 30extern struct shared_info *HYPERVISOR_shared_info; 31 32extern bool xen_fifo_events; 33 34void xen_setup_mfn_list_list(void); 35void xen_build_mfn_list_list(void); 36void xen_setup_machphys_mapping(void); 37void xen_setup_kernel_pagetable(pgd_t *pgd, unsigned long max_pfn); 38void __init xen_reserve_special_pages(void); 39void __init xen_pt_check_e820(void); 40 41void xen_mm_pin_all(void); 42void xen_mm_unpin_all(void); 43#ifdef CONFIG_X86_64 44void __init xen_relocate_p2m(void); 45#endif 46 47bool __init xen_is_e820_reserved(phys_addr_t start, phys_addr_t size); 48unsigned long __ref xen_chk_extra_mem(unsigned long pfn); 49void __init xen_inv_extra_mem(void); 50void __init xen_remap_memory(void); 51phys_addr_t __init xen_find_free_area(phys_addr_t size); 52char * __init xen_memory_setup(void); 53void __init xen_arch_setup(void); 54void xen_banner(void); 55void xen_enable_sysenter(void); 56void xen_enable_syscall(void); 57void xen_vcpu_restore(void); 58 59void xen_hvm_init_shared_info(void); 60void xen_unplug_emulated_devices(void); 61 62void __init xen_build_dynamic_phys_to_machine(void); 63void __init xen_vmalloc_p2m_tree(void); 64 65void xen_init_irq_ops(void); 66void xen_setup_timer(int cpu); 67void xen_setup_runstate_info(int cpu); 68void xen_teardown_timer(int cpu); 69void xen_setup_cpu_clockevents(void); 70void xen_save_time_memory_area(void); 71void xen_restore_time_memory_area(void); 72void xen_init_time_ops(void); 73void xen_hvm_init_time_ops(void); 74 75bool xen_vcpu_stolen(int vcpu); 76 77void xen_vcpu_setup(int cpu); 78void xen_vcpu_info_reset(int cpu); 79void xen_setup_vcpu_info_placement(void); 80 81#ifdef CONFIG_SMP 82void xen_smp_init(void); 83void __init xen_hvm_smp_init(void); 84 85extern cpumask_var_t xen_cpu_initialized_map; 86#else 87static inline void xen_smp_init(void) {} 88static inline void xen_hvm_smp_init(void) {} 89#endif 90 91#ifdef CONFIG_PARAVIRT_SPINLOCKS 92void __init xen_init_spinlocks(void); 93void xen_init_lock_cpu(int cpu); 94void xen_uninit_lock_cpu(int cpu); 95#else 96static inline void xen_init_spinlocks(void) 97{ 98} 99static inline void xen_init_lock_cpu(int cpu) 100{ 101} 102static inline void xen_uninit_lock_cpu(int cpu) 103{ 104} 105#endif 106 107struct dom0_vga_console_info; 108 109#ifdef CONFIG_XEN_DOM0 110void __init xen_init_vga(const struct dom0_vga_console_info *, size_t size, 111 struct screen_info *); 112#else 113static inline void __init xen_init_vga(const struct dom0_vga_console_info *info, 114 size_t size, struct screen_info *si) 115{ 116} 117#endif 118 119void xen_add_preferred_consoles(void); 120 121void __init xen_init_apic(void); 122 123#ifdef CONFIG_XEN_EFI 124extern void xen_efi_init(struct boot_params *boot_params); 125#else 126static inline void __init xen_efi_init(struct boot_params *boot_params) 127{ 128} 129#endif 130 131__visible void xen_irq_enable_direct(void); 132__visible void xen_irq_disable_direct(void); 133__visible unsigned long xen_save_fl_direct(void); 134 135__visible unsigned long xen_read_cr2(void); 136__visible unsigned long xen_read_cr2_direct(void); 137 138/* These are not functions, and cannot be called normally */ 139__visible void xen_iret(void); 140 141extern int xen_panic_handler_init(void); 142 143int xen_cpuhp_setup(int (*cpu_up_prepare_cb)(unsigned int), 144 int (*cpu_dead_cb)(unsigned int)); 145 146void xen_pin_vcpu(int cpu); 147 148void xen_emergency_restart(void); 149void xen_force_evtchn_callback(void); 150 151#ifdef CONFIG_XEN_PV 152void xen_pv_pre_suspend(void); 153void xen_pv_post_suspend(int suspend_cancelled); 154void xen_start_kernel(struct start_info *si); 155#else 156static inline void xen_pv_pre_suspend(void) {} 157static inline void xen_pv_post_suspend(int suspend_cancelled) {} 158#endif 159 160#ifdef CONFIG_XEN_PVHVM 161void xen_hvm_post_suspend(int suspend_cancelled); 162#else 163static inline void xen_hvm_post_suspend(int suspend_cancelled) {} 164#endif 165 166/* 167 * The maximum amount of extra memory compared to the base size. The 168 * main scaling factor is the size of struct page. At extreme ratios 169 * of base:extra, all the base memory can be filled with page 170 * structures for the extra memory, leaving no space for anything 171 * else. 172 * 173 * 10x seems like a reasonable balance between scaling flexibility and 174 * leaving a practically usable system. 175 */ 176#define EXTRA_MEM_RATIO (10) 177 178void xen_add_extra_mem(unsigned long start_pfn, unsigned long n_pfns); 179 180#endif /* XEN_OPS_H */ 181