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linux-headers-5.4.0-212
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xen
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xen-ops.h
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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef INCLUDE_XEN_OPS_H #define INCLUDE_XEN_OPS_H #include <linux/percpu.h> #include <linux/notifier.h> #include <linux/efi.h> #include <xen/features.h> #include <asm/xen/interface.h> #include <xen/interface/vcpu.h> DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu); DECLARE_PER_CPU(uint32_t, xen_vcpu_id); static inline uint32_t xen_vcpu_nr(int cpu) { return per_cpu(xen_vcpu_id, cpu); } #define XEN_VCPU_ID_INVALID U32_MAX void xen_arch_pre_suspend(void); void xen_arch_post_suspend(int suspend_cancelled); void xen_timer_resume(void); void xen_arch_resume(void); void xen_arch_suspend(void); void xen_reboot(int reason); void xen_resume_notifier_register(struct notifier_block *nb); void xen_resume_notifier_unregister(struct notifier_block *nb); bool xen_vcpu_stolen(int vcpu); void xen_setup_runstate_info(int cpu); void xen_time_setup_guest(void); void xen_manage_runstate_time(int action); void xen_get_runstate_snapshot(struct vcpu_runstate_info *res); u64 xen_steal_clock(int cpu); int xen_setup_shutdown_event(void); extern unsigned long *xen_contiguous_bitmap; #if defined(CONFIG_XEN_PV) || defined(CONFIG_ARM) || defined(CONFIG_ARM64) int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order, unsigned int address_bits, dma_addr_t *dma_handle); void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order); #else static inline int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order, unsigned int address_bits, dma_addr_t *dma_handle) { return 0; } static inline void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order) { } #endif #if defined(CONFIG_XEN_PV) int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr, xen_pfn_t *pfn, int nr, int *err_ptr, pgprot_t prot, unsigned int domid, bool no_translate, struct page **pages); #else static inline int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr, xen_pfn_t *pfn, int nr, int *err_ptr, pgprot_t prot, unsigned int domid, bool no_translate, struct page **pages) { BUG(); return 0; } #endif struct vm_area_struct; #ifdef CONFIG_XEN_AUTO_XLATE int xen_xlate_remap_gfn_array(struct vm_area_struct *vma, unsigned long addr, xen_pfn_t *gfn, int nr, int *err_ptr, pgprot_t prot, unsigned int domid, struct page **pages); int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma, int nr, struct page **pages); #else /* * These two functions are called from arch/x86/xen/mmu.c and so stubs * are needed for a configuration not specifying CONFIG_XEN_AUTO_XLATE. */ static inline int xen_xlate_remap_gfn_array(struct vm_area_struct *vma, unsigned long addr, xen_pfn_t *gfn, int nr, int *err_ptr, pgprot_t prot, unsigned int domid, struct page **pages) { return -EOPNOTSUPP; } static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma, int nr, struct page **pages) { return -EOPNOTSUPP; } #endif int xen_remap_vma_range(struct vm_area_struct *vma, unsigned long addr, unsigned long len); /* * xen_remap_domain_gfn_array() - map an array of foreign frames by gfn * @vma: VMA to map the pages into * @addr: Address at which to map the pages * @gfn: Array of GFNs to map * @nr: Number entries in the GFN array * @err_ptr: Returns per-GFN error status. * @prot: page protection mask * @domid: Domain owning the pages * @pages: Array of pages if this domain has an auto-translated physmap * * @gfn and @err_ptr may point to the same buffer, the GFNs will be * overwritten by the error codes after they are mapped. * * Returns the number of successfully mapped frames, or a -ve error * code. */ static inline int xen_remap_domain_gfn_array(struct vm_area_struct *vma, unsigned long addr, xen_pfn_t *gfn, int nr, int *err_ptr, pgprot_t prot, unsigned int domid, struct page **pages) { if (xen_feature(XENFEAT_auto_translated_physmap)) return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr, prot, domid, pages); /* We BUG_ON because it's a programmer error to pass a NULL err_ptr, * and the consequences later is quite hard to detect what the actual * cause of "wrong memory was mapped in". */ BUG_ON(err_ptr == NULL); return xen_remap_pfn(vma, addr, gfn, nr, err_ptr, prot, domid, false, pages); } /* * xen_remap_domain_mfn_array() - map an array of foreign frames by mfn * @vma: VMA to map the pages into * @addr: Address at which to map the pages * @mfn: Array of MFNs to map * @nr: Number entries in the MFN array * @err_ptr: Returns per-MFN error status. * @prot: page protection mask * @domid: Domain owning the pages * @pages: Array of pages if this domain has an auto-translated physmap * * @mfn and @err_ptr may point to the same buffer, the MFNs will be * overwritten by the error codes after they are mapped. * * Returns the number of successfully mapped frames, or a -ve error * code. */ static inline int xen_remap_domain_mfn_array(struct vm_area_struct *vma, unsigned long addr, xen_pfn_t *mfn, int nr, int *err_ptr, pgprot_t prot, unsigned int domid, struct page **pages) { if (xen_feature(XENFEAT_auto_translated_physmap)) return -EOPNOTSUPP; return xen_remap_pfn(vma, addr, mfn, nr, err_ptr, prot, domid, true, pages); } /* xen_remap_domain_gfn_range() - map a range of foreign frames * @vma: VMA to map the pages into * @addr: Address at which to map the pages * @gfn: First GFN to map. * @nr: Number frames to map * @prot: page protection mask * @domid: Domain owning the pages * @pages: Array of pages if this domain has an auto-translated physmap * * Returns the number of successfully mapped frames, or a -ve error * code. */ static inline int xen_remap_domain_gfn_range(struct vm_area_struct *vma, unsigned long addr, xen_pfn_t gfn, int nr, pgprot_t prot, unsigned int domid, struct page **pages) { if (xen_feature(XENFEAT_auto_translated_physmap)) return -EOPNOTSUPP; return xen_remap_pfn(vma, addr, &gfn, nr, NULL, prot, domid, false, pages); } int xen_unmap_domain_gfn_range(struct vm_area_struct *vma, int numpgs, struct page **pages); int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr, unsigned long nr_grant_frames); bool xen_running_on_version_or_later(unsigned int major, unsigned int minor); void xen_efi_runtime_setup(void); #ifdef CONFIG_PREEMPT static inline void xen_preemptible_hcall_begin(void) { } static inline void xen_preemptible_hcall_end(void) { } #else DECLARE_PER_CPU(bool, xen_in_preemptible_hcall); static inline void xen_preemptible_hcall_begin(void) { __this_cpu_write(xen_in_preemptible_hcall, true); } static inline void xen_preemptible_hcall_end(void) { __this_cpu_write(xen_in_preemptible_hcall, false); } #endif /* CONFIG_PREEMPT */ #endif /* INCLUDE_XEN_OPS_H */