/* 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 */