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Diffstat (limited to '')
| -rw-r--r-- | include/xen/xen-ops.h | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h new file mode 100644 index 000000000..39a5580f8 --- /dev/null +++ b/include/xen/xen-ops.h @@ -0,0 +1,239 @@ +/* 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 */ |