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 <xen/features.h> 9 #include <asm/xen/interface.h> 10 #include <xen/interface/vcpu.h> 11 12 DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu); 13 14 DECLARE_PER_CPU(uint32_t, xen_vcpu_id); 15 static inline uint32_t xen_vcpu_nr(int cpu) 16 { 17 return per_cpu(xen_vcpu_id, cpu); 18 } 19 20 #define XEN_VCPU_ID_INVALID U32_MAX 21 22 void xen_arch_pre_suspend(void); 23 void xen_arch_post_suspend(int suspend_cancelled); 24 25 void xen_timer_resume(void); 26 void xen_arch_resume(void); 27 void xen_arch_suspend(void); 28 29 void xen_reboot(int reason); 30 31 void xen_resume_notifier_register(struct notifier_block *nb); 32 void xen_resume_notifier_unregister(struct notifier_block *nb); 33 34 bool xen_vcpu_stolen(int vcpu); 35 void xen_setup_runstate_info(int cpu); 36 void xen_time_setup_guest(void); 37 void xen_manage_runstate_time(int action); 38 void xen_get_runstate_snapshot(struct vcpu_runstate_info *res); 39 u64 xen_steal_clock(int cpu); 40 41 int xen_setup_shutdown_event(void); 42 43 extern unsigned long *xen_contiguous_bitmap; 44 45 #if defined(CONFIG_XEN_PV) 46 int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr, 47 xen_pfn_t *pfn, int nr, int *err_ptr, pgprot_t prot, 48 unsigned int domid, bool no_translate); 49 #else 50 static inline int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr, 51 xen_pfn_t *pfn, int nr, int *err_ptr, 52 pgprot_t prot, unsigned int domid, 53 bool no_translate) 54 { 55 BUG(); 56 return 0; 57 } 58 #endif 59 60 struct vm_area_struct; 61 62 #ifdef CONFIG_XEN_AUTO_XLATE 63 int xen_xlate_remap_gfn_array(struct vm_area_struct *vma, 64 unsigned long addr, 65 xen_pfn_t *gfn, int nr, 66 int *err_ptr, pgprot_t prot, 67 unsigned int domid, 68 struct page **pages); 69 int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma, 70 int nr, struct page **pages); 71 #else 72 /* 73 * These two functions are called from arch/x86/xen/mmu.c and so stubs 74 * are needed for a configuration not specifying CONFIG_XEN_AUTO_XLATE. 75 */ 76 static inline int xen_xlate_remap_gfn_array(struct vm_area_struct *vma, 77 unsigned long addr, 78 xen_pfn_t *gfn, int nr, 79 int *err_ptr, pgprot_t prot, 80 unsigned int domid, 81 struct page **pages) 82 { 83 return -EOPNOTSUPP; 84 } 85 86 static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma, 87 int nr, struct page **pages) 88 { 89 return -EOPNOTSUPP; 90 } 91 #endif 92 93 int xen_remap_vma_range(struct vm_area_struct *vma, unsigned long addr, 94 unsigned long len); 95 96 /* 97 * xen_remap_domain_gfn_array() - map an array of foreign frames by gfn 98 * @vma: VMA to map the pages into 99 * @addr: Address at which to map the pages 100 * @gfn: Array of GFNs to map 101 * @nr: Number entries in the GFN array 102 * @err_ptr: Returns per-GFN error status. 103 * @prot: page protection mask 104 * @domid: Domain owning the pages 105 * @pages: Array of pages if this domain has an auto-translated physmap 106 * 107 * @gfn and @err_ptr may point to the same buffer, the GFNs will be 108 * overwritten by the error codes after they are mapped. 109 * 110 * Returns the number of successfully mapped frames, or a -ve error 111 * code. 112 */ 113 static inline int xen_remap_domain_gfn_array(struct vm_area_struct *vma, 114 unsigned long addr, 115 xen_pfn_t *gfn, int nr, 116 int *err_ptr, pgprot_t prot, 117 unsigned int domid, 118 struct page **pages) 119 { 120 if (xen_feature(XENFEAT_auto_translated_physmap)) 121 return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr, 122 prot, domid, pages); 123 124 /* We BUG_ON because it's a programmer error to pass a NULL err_ptr, 125 * and the consequences later is quite hard to detect what the actual 126 * cause of "wrong memory was mapped in". 127 */ 128 BUG_ON(err_ptr == NULL); 129 return xen_remap_pfn(vma, addr, gfn, nr, err_ptr, prot, domid, 130 false); 131 } 132 133 /* 134 * xen_remap_domain_mfn_array() - map an array of foreign frames by mfn 135 * @vma: VMA to map the pages into 136 * @addr: Address at which to map the pages 137 * @mfn: Array of MFNs to map 138 * @nr: Number entries in the MFN array 139 * @err_ptr: Returns per-MFN error status. 140 * @prot: page protection mask 141 * @domid: Domain owning the pages 142 * 143 * @mfn and @err_ptr may point to the same buffer, the MFNs will be 144 * overwritten by the error codes after they are mapped. 145 * 146 * Returns the number of successfully mapped frames, or a -ve error 147 * code. 148 */ 149 static inline int xen_remap_domain_mfn_array(struct vm_area_struct *vma, 150 unsigned long addr, xen_pfn_t *mfn, 151 int nr, int *err_ptr, 152 pgprot_t prot, unsigned int domid) 153 { 154 if (xen_feature(XENFEAT_auto_translated_physmap)) 155 return -EOPNOTSUPP; 156 157 return xen_remap_pfn(vma, addr, mfn, nr, err_ptr, prot, domid, 158 true); 159 } 160 161 /* xen_remap_domain_gfn_range() - map a range of foreign frames 162 * @vma: VMA to map the pages into 163 * @addr: Address at which to map the pages 164 * @gfn: First GFN to map. 165 * @nr: Number frames to map 166 * @prot: page protection mask 167 * @domid: Domain owning the pages 168 * @pages: Array of pages if this domain has an auto-translated physmap 169 * 170 * Returns the number of successfully mapped frames, or a -ve error 171 * code. 172 */ 173 static inline int xen_remap_domain_gfn_range(struct vm_area_struct *vma, 174 unsigned long addr, 175 xen_pfn_t gfn, int nr, 176 pgprot_t prot, unsigned int domid, 177 struct page **pages) 178 { 179 if (xen_feature(XENFEAT_auto_translated_physmap)) 180 return -EOPNOTSUPP; 181 182 return xen_remap_pfn(vma, addr, &gfn, nr, NULL, prot, domid, false); 183 } 184 185 int xen_unmap_domain_gfn_range(struct vm_area_struct *vma, 186 int numpgs, struct page **pages); 187 188 int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr, 189 unsigned long nr_grant_frames); 190 191 bool xen_running_on_version_or_later(unsigned int major, unsigned int minor); 192 193 void xen_efi_runtime_setup(void); 194 195 196 #if defined(CONFIG_XEN_PV) && !defined(CONFIG_PREEMPTION) 197 198 DECLARE_PER_CPU(bool, xen_in_preemptible_hcall); 199 200 static inline void xen_preemptible_hcall_begin(void) 201 { 202 __this_cpu_write(xen_in_preemptible_hcall, true); 203 } 204 205 static inline void xen_preemptible_hcall_end(void) 206 { 207 __this_cpu_write(xen_in_preemptible_hcall, false); 208 } 209 210 #else 211 212 static inline void xen_preemptible_hcall_begin(void) { } 213 static inline void xen_preemptible_hcall_end(void) { } 214 215 #endif /* CONFIG_XEN_PV && !CONFIG_PREEMPTION */ 216 217 #ifdef CONFIG_XEN_GRANT_DMA_OPS 218 void xen_grant_setup_dma_ops(struct device *dev); 219 bool xen_is_grant_dma_device(struct device *dev); 220 #else 221 static inline void xen_grant_setup_dma_ops(struct device *dev) 222 { 223 } 224 static inline bool xen_is_grant_dma_device(struct device *dev) 225 { 226 return false; 227 } 228 #endif /* CONFIG_XEN_GRANT_DMA_OPS */ 229 230 #endif /* INCLUDE_XEN_OPS_H */ 231