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Diffstat (limited to 'include/xen/xen-ops.h')
| -rw-r--r-- | include/xen/xen-ops.h | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h new file mode 100644 index 000000000..f6e798d42 --- /dev/null +++ b/include/xen/xen-ops.h @@ -0,0 +1,219 @@ +/* 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; + +#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 + +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 */ |