include/xen/xen-ops.h - linux - Git at Google

 /* 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 <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;

 #ifdef CONFIG_XEN_PV
 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

 struct vm_area_struct;

 /*
  * 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.
  */
 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 domid,
 			       struct page **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.
  */
 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);

 /* 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.
  */
 int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
 			       unsigned long addr,
 			       xen_pfn_t gfn, int nr,
 			       pgprot_t prot, unsigned domid,
 			       struct page **pages);
 int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
 			       int numpgs, struct page **pages);

 #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 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_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);

 efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc);
 efi_status_t xen_efi_set_time(efi_time_t *tm);
 efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending,
 				     efi_time_t *tm);
 efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm);
 efi_status_t xen_efi_get_variable(efi_char16_t *name, efi_guid_t *vendor,
 				  u32 *attr, unsigned long *data_size,
 				  void *data);
 efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
 				       efi_char16_t *name, efi_guid_t *vendor);
 efi_status_t xen_efi_set_variable(efi_char16_t *name, efi_guid_t *vendor,
 				  u32 attr, unsigned long data_size,
 				  void *data);
 efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space,
 					 u64 *remaining_space,
 					 u64 *max_variable_size);
 efi_status_t xen_efi_get_next_high_mono_count(u32 *count);
 efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
 				    unsigned long count, unsigned long sg_list);
 efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
 					unsigned long count, u64 *max_size,
 					int *reset_type);
 void xen_efi_reset_system(int reset_type, efi_status_t status,
 			  unsigned long data_size, efi_char16_t *data);


 #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 */
	/* 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 <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;

	#ifdef CONFIG_XEN_PV
	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

	struct vm_area_struct;

	/*
	* 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.
	*/
	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 domid,
	struct page **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.
	*/
	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);

	/* 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.
	*/
	int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
	unsigned long addr,
	xen_pfn_t gfn, int nr,
	pgprot_t prot, unsigned domid,
	struct page **pages);
	int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
	int numpgs, struct page **pages);

	#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 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_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);

	efi_status_t xen_efi_get_time(efi_time_t tm, efi_time_cap_t tc);
	efi_status_t xen_efi_set_time(efi_time_t *tm);
	efi_status_t xen_efi_get_wakeup_time(efi_bool_t enabled, efi_bool_t pending,
	efi_time_t *tm);
	efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm);
	efi_status_t xen_efi_get_variable(efi_char16_t name, efi_guid_t vendor,
	u32 attr, unsigned long data_size,
	void *data);
	efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
	efi_char16_t name, efi_guid_t vendor);
	efi_status_t xen_efi_set_variable(efi_char16_t name, efi_guid_t vendor,
	u32 attr, unsigned long data_size,
	void *data);
	efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space,
	u64 *remaining_space,
	u64 *max_variable_size);
	efi_status_t xen_efi_get_next_high_mono_count(u32 *count);
	efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
	unsigned long count, unsigned long sg_list);
	efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
	unsigned long count, u64 *max_size,
	int *reset_type);
	void xen_efi_reset_system(int reset_type, efi_status_t status,
	unsigned long data_size, efi_char16_t *data);


	#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 */