include/xen/xen-ops.h - kernel/common - 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 <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);


 #if defined(CONFIG_XEN_PV) && !defined(CONFIG_PREEMPTION)

 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);
 }

 #else

 static inline void xen_preemptible_hcall_begin(void) { }
 static inline void xen_preemptible_hcall_end(void) { }

 #endif /* CONFIG_XEN_PV && !CONFIG_PREEMPTION */

 #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 <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);


	#if defined(CONFIG_XEN_PV) && !defined(CONFIG_PREEMPTION)

	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);
	}

	#else

	static inline void xen_preemptible_hcall_begin(void) { }
	static inline void xen_preemptible_hcall_end(void) { }

	#endif /* CONFIG_XEN_PV && !CONFIG_PREEMPTION */

	#endif /* INCLUDE_XEN_OPS_H */