xen-ops.h (6781B)
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 12DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu); 13 14DECLARE_PER_CPU(uint32_t, xen_vcpu_id); 15static 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 22void xen_arch_pre_suspend(void); 23void xen_arch_post_suspend(int suspend_cancelled); 24 25void xen_timer_resume(void); 26void xen_arch_resume(void); 27void xen_arch_suspend(void); 28 29void xen_reboot(int reason); 30 31void xen_resume_notifier_register(struct notifier_block *nb); 32void xen_resume_notifier_unregister(struct notifier_block *nb); 33 34bool xen_vcpu_stolen(int vcpu); 35void xen_setup_runstate_info(int cpu); 36void xen_time_setup_guest(void); 37void xen_manage_runstate_time(int action); 38void xen_get_runstate_snapshot(struct vcpu_runstate_info *res); 39u64 xen_steal_clock(int cpu); 40 41int xen_setup_shutdown_event(void); 42 43extern unsigned long *xen_contiguous_bitmap; 44 45#if defined(CONFIG_XEN_PV) 46int 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 50static 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 60struct vm_area_struct; 61 62#ifdef CONFIG_XEN_AUTO_XLATE 63int 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); 69int 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 */ 76static 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 86static 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 93int 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 */ 113static 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 */ 149static 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 */ 173static 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 185int xen_unmap_domain_gfn_range(struct vm_area_struct *vma, 186 int numpgs, struct page **pages); 187 188int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr, 189 unsigned long nr_grant_frames); 190 191bool xen_running_on_version_or_later(unsigned int major, unsigned int minor); 192 193void xen_efi_runtime_setup(void); 194 195 196#if defined(CONFIG_XEN_PV) && !defined(CONFIG_PREEMPTION) 197 198DECLARE_PER_CPU(bool, xen_in_preemptible_hcall); 199 200static inline void xen_preemptible_hcall_begin(void) 201{ 202 __this_cpu_write(xen_in_preemptible_hcall, true); 203} 204 205static inline void xen_preemptible_hcall_end(void) 206{ 207 __this_cpu_write(xen_in_preemptible_hcall, false); 208} 209 210#else 211 212static inline void xen_preemptible_hcall_begin(void) { } 213static inline void xen_preemptible_hcall_end(void) { } 214 215#endif /* CONFIG_XEN_PV && !CONFIG_PREEMPTION */ 216 217#ifdef CONFIG_XEN_GRANT_DMA_OPS 218void xen_grant_setup_dma_ops(struct device *dev); 219bool xen_is_grant_dma_device(struct device *dev); 220#else 221static inline void xen_grant_setup_dma_ops(struct device *dev) 222{ 223} 224static 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 */