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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef INCLUDE_XEN_OPS_H3#define INCLUDE_XEN_OPS_H4 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 13DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);14 15DECLARE_PER_CPU(uint32_t, xen_vcpu_id);16static 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_MAX22 23void xen_arch_pre_suspend(void);24void xen_arch_post_suspend(int suspend_cancelled);25 26void xen_timer_resume(void);27void xen_arch_resume(void);28void xen_arch_suspend(void);29 30void xen_reboot(int reason);31 32void xen_resume_notifier_register(struct notifier_block *nb);33void xen_resume_notifier_unregister(struct notifier_block *nb);34 35bool xen_vcpu_stolen(int vcpu);36void xen_setup_runstate_info(int cpu);37void xen_time_setup_guest(void);38void xen_manage_runstate_time(int action);39void xen_get_runstate_snapshot(struct vcpu_runstate_info *res);40u64 xen_steal_clock(int cpu);41 42int xen_setup_shutdown_event(void);43 44extern unsigned long *xen_contiguous_bitmap;45 46#if defined(CONFIG_XEN_PV)47int 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#else51static 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#endif60 61struct vm_area_struct;62 63#ifdef CONFIG_XEN_AUTO_XLATE64int 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);70int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,71 int nr, struct page **pages);72#else73/*74 * These two functions are called from arch/x86/xen/mmu.c and so stubs75 * are needed for a configuration not specifying CONFIG_XEN_AUTO_XLATE.76 */77static 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 87static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,88 int nr, struct page **pages)89{90 return -EOPNOTSUPP;91}92#endif93 94int 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 gfn99 * @vma: VMA to map the pages into100 * @addr: Address at which to map the pages101 * @gfn: Array of GFNs to map102 * @nr: Number entries in the GFN array103 * @err_ptr: Returns per-GFN error status.104 * @prot: page protection mask105 * @domid: Domain owning the pages106 * @pages: Array of pages if this domain has an auto-translated physmap107 *108 * @gfn and @err_ptr may point to the same buffer, the GFNs will be109 * overwritten by the error codes after they are mapped.110 *111 * Returns the number of successfully mapped frames, or a -ve error112 * code.113 */114static 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 actual127 * 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 mfn136 * @vma: VMA to map the pages into137 * @addr: Address at which to map the pages138 * @mfn: Array of MFNs to map139 * @nr: Number entries in the MFN array140 * @err_ptr: Returns per-MFN error status.141 * @prot: page protection mask142 * @domid: Domain owning the pages143 *144 * @mfn and @err_ptr may point to the same buffer, the MFNs will be145 * overwritten by the error codes after they are mapped.146 *147 * Returns the number of successfully mapped frames, or a -ve error148 * code.149 */150static 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 frames163 * @vma: VMA to map the pages into164 * @addr: Address at which to map the pages165 * @gfn: First GFN to map.166 * @nr: Number frames to map167 * @prot: page protection mask168 * @domid: Domain owning the pages169 * @pages: Array of pages if this domain has an auto-translated physmap170 *171 * Returns the number of successfully mapped frames, or a -ve error172 * code.173 */174static 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 186int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,187 int numpgs, struct page **pages);188 189int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr,190 unsigned long nr_grant_frames);191 192bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);193 194void xen_efi_runtime_setup(void);195 196 197#if defined(CONFIG_XEN_PV) && !defined(CONFIG_PREEMPTION)198 199DECLARE_PER_CPU(bool, xen_in_preemptible_hcall);200 201static inline void xen_preemptible_hcall_begin(void)202{203 __this_cpu_write(xen_in_preemptible_hcall, true);204}205 206static inline void xen_preemptible_hcall_end(void)207{208 __this_cpu_write(xen_in_preemptible_hcall, false);209}210 211#else212 213static inline void xen_preemptible_hcall_begin(void) { }214static inline void xen_preemptible_hcall_end(void) { }215 216#endif /* CONFIG_XEN_PV && !CONFIG_PREEMPTION */217 218#ifdef CONFIG_XEN_GRANT_DMA_OPS219bool xen_virtio_restricted_mem_acc(struct virtio_device *dev);220#else221struct virtio_device;222 223static 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