1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef INCLUDE_XEN_OPS_H 3 #define INCLUDE_XEN_OPS_H 4 5 #include <linux/percpu.h> 6 #include <linux/notifier.h> 7 #include <linux/efi.h> 8 #include <linux/virtio_anchor.h> 9 #include <xen/features.h> 10 #include <asm/xen/interface.h> 11 #include <xen/interface/vcpu.h> 12 13 DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu); 14 15 DECLARE_PER_CPU(uint32_t, xen_vcpu_id); 16 static inline uint32_t xen_vcpu_nr(int cpu) 17 { 18 return per_cpu(xen_vcpu_id, cpu); 19 } 20 21 #define XEN_VCPU_ID_INVALID U32_MAX 22 23 void xen_arch_pre_suspend(void); 24 void xen_arch_post_suspend(int suspend_cancelled); 25 26 void xen_timer_resume(void); 27 void xen_arch_resume(void); 28 void xen_arch_suspend(void); 29 30 void xen_reboot(int reason); 31 32 void xen_resume_notifier_register(struct notifier_block *nb); 33 void xen_resume_notifier_unregister(struct notifier_block *nb); 34 35 bool xen_vcpu_stolen(int vcpu); 36 void xen_setup_runstate_info(int cpu); 37 void xen_time_setup_guest(void); 38 void xen_manage_runstate_time(int action); 39 void xen_get_runstate_snapshot(struct vcpu_runstate_info *res); 40 u64 xen_steal_clock(int cpu); 41 42 int xen_setup_shutdown_event(void); 43 44 extern unsigned long *xen_contiguous_bitmap; 45 46 #if defined(CONFIG_XEN_PV) 47 int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr, 48 xen_pfn_t *pfn, int nr, int *err_ptr, pgprot_t prot, 49 unsigned int domid, bool no_translate); 50 #else 51 static inline int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr, 52 xen_pfn_t *pfn, int nr, int *err_ptr, 53 pgprot_t prot, unsigned int domid, 54 bool no_translate) 55 { 56 BUG(); 57 return 0; 58 } 59 #endif 60 61 struct vm_area_struct; 62 63 #ifdef CONFIG_XEN_AUTO_XLATE 64 int xen_xlate_remap_gfn_array(struct vm_area_struct *vma, 65 unsigned long addr, 66 xen_pfn_t *gfn, int nr, 67 int *err_ptr, pgprot_t prot, 68 unsigned int domid, 69 struct page **pages); 70 int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma, 71 int nr, struct page **pages); 72 #else 73 /* 74 * These two functions are called from arch/x86/xen/mmu.c and so stubs 75 * are needed for a configuration not specifying CONFIG_XEN_AUTO_XLATE. 76 */ 77 static inline int xen_xlate_remap_gfn_array(struct vm_area_struct *vma, 78 unsigned long addr, 79 xen_pfn_t *gfn, int nr, 80 int *err_ptr, pgprot_t prot, 81 unsigned int domid, 82 struct page **pages) 83 { 84 return -EOPNOTSUPP; 85 } 86 87 static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma, 88 int nr, struct page **pages) 89 { 90 return -EOPNOTSUPP; 91 } 92 #endif 93 94 int xen_remap_vma_range(struct vm_area_struct *vma, unsigned long addr, 95 unsigned long len); 96 97 /* 98 * xen_remap_domain_gfn_array() - map an array of foreign frames by gfn 99 * @vma: VMA to map the pages into 100 * @addr: Address at which to map the pages 101 * @gfn: Array of GFNs to map 102 * @nr: Number entries in the GFN array 103 * @err_ptr: Returns per-GFN error status. 104 * @prot: page protection mask 105 * @domid: Domain owning the pages 106 * @pages: Array of pages if this domain has an auto-translated physmap 107 * 108 * @gfn and @err_ptr may point to the same buffer, the GFNs will be 109 * overwritten by the error codes after they are mapped. 110 * 111 * Returns the number of successfully mapped frames, or a -ve error 112 * code. 113 */ 114 static inline int xen_remap_domain_gfn_array(struct vm_area_struct *vma, 115 unsigned long addr, 116 xen_pfn_t *gfn, int nr, 117 int *err_ptr, pgprot_t prot, 118 unsigned int domid, 119 struct page **pages) 120 { 121 if (xen_feature(XENFEAT_auto_translated_physmap)) 122 return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr, 123 prot, domid, pages); 124 125 /* We BUG_ON because it's a programmer error to pass a NULL err_ptr, 126 * and the consequences later is quite hard to detect what the actual 127 * cause of "wrong memory was mapped in". 128 */ 129 BUG_ON(err_ptr == NULL); 130 return xen_remap_pfn(vma, addr, gfn, nr, err_ptr, prot, domid, 131 false); 132 } 133 134 /* 135 * xen_remap_domain_mfn_array() - map an array of foreign frames by mfn 136 * @vma: VMA to map the pages into 137 * @addr: Address at which to map the pages 138 * @mfn: Array of MFNs to map 139 * @nr: Number entries in the MFN array 140 * @err_ptr: Returns per-MFN error status. 141 * @prot: page protection mask 142 * @domid: Domain owning the pages 143 * 144 * @mfn and @err_ptr may point to the same buffer, the MFNs will be 145 * overwritten by the error codes after they are mapped. 146 * 147 * Returns the number of successfully mapped frames, or a -ve error 148 * code. 149 */ 150 static inline int xen_remap_domain_mfn_array(struct vm_area_struct *vma, 151 unsigned long addr, xen_pfn_t *mfn, 152 int nr, int *err_ptr, 153 pgprot_t prot, unsigned int domid) 154 { 155 if (xen_feature(XENFEAT_auto_translated_physmap)) 156 return -EOPNOTSUPP; 157 158 return xen_remap_pfn(vma, addr, mfn, nr, err_ptr, prot, domid, 159 true); 160 } 161 162 /* xen_remap_domain_gfn_range() - map a range of foreign frames 163 * @vma: VMA to map the pages into 164 * @addr: Address at which to map the pages 165 * @gfn: First GFN to map. 166 * @nr: Number frames to map 167 * @prot: page protection mask 168 * @domid: Domain owning the pages 169 * @pages: Array of pages if this domain has an auto-translated physmap 170 * 171 * Returns the number of successfully mapped frames, or a -ve error 172 * code. 173 */ 174 static inline int xen_remap_domain_gfn_range(struct vm_area_struct *vma, 175 unsigned long addr, 176 xen_pfn_t gfn, int nr, 177 pgprot_t prot, unsigned int domid, 178 struct page **pages) 179 { 180 if (xen_feature(XENFEAT_auto_translated_physmap)) 181 return -EOPNOTSUPP; 182 183 return xen_remap_pfn(vma, addr, &gfn, nr, NULL, prot, domid, false); 184 } 185 186 int xen_unmap_domain_gfn_range(struct vm_area_struct *vma, 187 int numpgs, struct page **pages); 188 189 int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr, 190 unsigned long nr_grant_frames); 191 192 bool xen_running_on_version_or_later(unsigned int major, unsigned int minor); 193 194 void xen_efi_runtime_setup(void); 195 196 197 #if defined(CONFIG_XEN_PV) && !defined(CONFIG_PREEMPTION) 198 199 DECLARE_PER_CPU(bool, xen_in_preemptible_hcall); 200 201 static inline void xen_preemptible_hcall_begin(void) 202 { 203 __this_cpu_write(xen_in_preemptible_hcall, true); 204 } 205 206 static inline void xen_preemptible_hcall_end(void) 207 { 208 __this_cpu_write(xen_in_preemptible_hcall, false); 209 } 210 211 #else 212 213 static inline void xen_preemptible_hcall_begin(void) { } 214 static inline void xen_preemptible_hcall_end(void) { } 215 216 #endif /* CONFIG_XEN_PV && !CONFIG_PREEMPTION */ 217 218 #ifdef CONFIG_XEN_GRANT_DMA_OPS 219 bool xen_virtio_restricted_mem_acc(struct virtio_device *dev); 220 #else 221 struct virtio_device; 222 223 static inline bool xen_virtio_restricted_mem_acc(struct virtio_device *dev) 224 { 225 return false; 226 } 227 #endif /* CONFIG_XEN_GRANT_DMA_OPS */ 228 229 #endif /* INCLUDE_XEN_OPS_H */ 230