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 */ 11 extern const char xen_failsafe_callback[]; 12 13 void xen_entry_SYSENTER_compat(void); 14 #ifdef CONFIG_X86_64 15 void xen_entry_SYSCALL_64(void); 16 void xen_entry_SYSCALL_compat(void); 17 #endif 18 19 extern void *xen_initial_gdt; 20 21 struct trap_info; 22 void xen_copy_trap_info(struct trap_info *traps); 23 24 DECLARE_PER_CPU_ALIGNED(struct vcpu_info, xen_vcpu_info); 25 DECLARE_PER_CPU(unsigned long, xen_cr3); 26 DECLARE_PER_CPU(unsigned long, xen_current_cr3); 27 28 extern struct start_info *xen_start_info; 29 extern struct shared_info xen_dummy_shared_info; 30 extern struct shared_info *HYPERVISOR_shared_info; 31 32 extern bool xen_fifo_events; 33 34 void xen_setup_mfn_list_list(void); 35 void xen_build_mfn_list_list(void); 36 void xen_setup_machphys_mapping(void); 37 void xen_setup_kernel_pagetable(pgd_t *pgd, unsigned long max_pfn); 38 void __init xen_reserve_special_pages(void); 39 void __init xen_pt_check_e820(void); 40 41 void xen_mm_pin_all(void); 42 void xen_mm_unpin_all(void); 43 #ifdef CONFIG_X86_64 44 void __init xen_relocate_p2m(void); 45 #endif 46 void __init xen_do_remap_nonram(void); 47 void __init xen_add_remap_nonram(phys_addr_t maddr, phys_addr_t paddr, 48 unsigned long size); 49 50 void __init xen_chk_is_e820_usable(phys_addr_t start, phys_addr_t size, 51 const char *component); 52 unsigned long __ref xen_chk_extra_mem(unsigned long pfn); 53 void __init xen_inv_extra_mem(void); 54 void __init xen_remap_memory(void); 55 phys_addr_t __init xen_find_free_area(phys_addr_t size); 56 char * __init xen_memory_setup(void); 57 void __init xen_arch_setup(void); 58 void xen_banner(void); 59 void xen_enable_sysenter(void); 60 void xen_enable_syscall(void); 61 void xen_vcpu_restore(void); 62 63 void xen_hvm_init_shared_info(void); 64 void xen_unplug_emulated_devices(void); 65 66 void __init xen_build_dynamic_phys_to_machine(void); 67 void __init xen_vmalloc_p2m_tree(void); 68 69 void xen_init_irq_ops(void); 70 void xen_setup_timer(int cpu); 71 void xen_setup_runstate_info(int cpu); 72 void xen_teardown_timer(int cpu); 73 void xen_setup_cpu_clockevents(void); 74 void xen_save_time_memory_area(void); 75 void xen_restore_time_memory_area(void); 76 void xen_init_time_ops(void); 77 void xen_hvm_init_time_ops(void); 78 79 bool xen_vcpu_stolen(int vcpu); 80 81 void xen_vcpu_setup(int cpu); 82 void xen_vcpu_info_reset(int cpu); 83 void xen_setup_vcpu_info_placement(void); 84 85 #ifdef CONFIG_SMP 86 void xen_smp_init(void); 87 void __init xen_hvm_smp_init(void); 88 89 extern cpumask_var_t xen_cpu_initialized_map; 90 #else 91 static inline void xen_smp_init(void) {} 92 static inline void xen_hvm_smp_init(void) {} 93 #endif 94 95 #ifdef CONFIG_PARAVIRT_SPINLOCKS 96 void __init xen_init_spinlocks(void); 97 void xen_init_lock_cpu(int cpu); 98 void xen_uninit_lock_cpu(int cpu); 99 #else 100 static inline void xen_init_spinlocks(void) 101 { 102 } 103 static inline void xen_init_lock_cpu(int cpu) 104 { 105 } 106 static inline void xen_uninit_lock_cpu(int cpu) 107 { 108 } 109 #endif 110 111 struct dom0_vga_console_info; 112 113 #ifdef CONFIG_XEN_DOM0 114 void __init xen_init_vga(const struct dom0_vga_console_info *, size_t size, 115 struct screen_info *); 116 #else 117 static inline void __init xen_init_vga(const struct dom0_vga_console_info *info, 118 size_t size, struct screen_info *si) 119 { 120 } 121 #endif 122 123 void xen_add_preferred_consoles(void); 124 125 void __init xen_init_apic(void); 126 127 #ifdef CONFIG_XEN_EFI 128 extern void xen_efi_init(struct boot_params *boot_params); 129 #else 130 static inline void __init xen_efi_init(struct boot_params *boot_params) 131 { 132 } 133 #endif 134 135 __visible void xen_irq_enable_direct(void); 136 __visible void xen_irq_disable_direct(void); 137 __visible unsigned long xen_save_fl_direct(void); 138 139 __visible unsigned long xen_read_cr2(void); 140 __visible unsigned long xen_read_cr2_direct(void); 141 142 /* These are not functions, and cannot be called normally */ 143 __visible void xen_iret(void); 144 145 extern int xen_panic_handler_init(void); 146 147 int xen_cpuhp_setup(int (*cpu_up_prepare_cb)(unsigned int), 148 int (*cpu_dead_cb)(unsigned int)); 149 150 void xen_pin_vcpu(int cpu); 151 152 void xen_emergency_restart(void); 153 void xen_force_evtchn_callback(void); 154 155 #ifdef CONFIG_XEN_PV 156 void xen_pv_pre_suspend(void); 157 void xen_pv_post_suspend(int suspend_cancelled); 158 void xen_start_kernel(struct start_info *si); 159 #else 160 static inline void xen_pv_pre_suspend(void) {} 161 static inline void xen_pv_post_suspend(int suspend_cancelled) {} 162 #endif 163 164 #ifdef CONFIG_XEN_PVHVM 165 void xen_hvm_post_suspend(int suspend_cancelled); 166 #else 167 static inline void xen_hvm_post_suspend(int suspend_cancelled) {} 168 #endif 169 170 /* 171 * The maximum amount of extra memory compared to the base size. The 172 * main scaling factor is the size of struct page. At extreme ratios 173 * of base:extra, all the base memory can be filled with page 174 * structures for the extra memory, leaving no space for anything 175 * else. 176 * 177 * 10x seems like a reasonable balance between scaling flexibility and 178 * leaving a practically usable system. 179 */ 180 #define EXTRA_MEM_RATIO (10) 181 182 void xen_add_extra_mem(unsigned long start_pfn, unsigned long n_pfns); 183 184 #endif /* XEN_OPS_H */ 185