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224 lines
6.6 KiB
224 lines
6.6 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef INCLUDE_XEN_OPS_H |
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#define INCLUDE_XEN_OPS_H |
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#include <linux/percpu.h> |
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#include <linux/notifier.h> |
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#include <linux/efi.h> |
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#include <xen/features.h> |
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#include <asm/xen/interface.h> |
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#include <xen/interface/vcpu.h> |
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DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu); |
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DECLARE_PER_CPU(uint32_t, xen_vcpu_id); |
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static inline uint32_t xen_vcpu_nr(int cpu) |
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{ |
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return per_cpu(xen_vcpu_id, cpu); |
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} |
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#define XEN_VCPU_ID_INVALID U32_MAX |
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void xen_arch_pre_suspend(void); |
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void xen_arch_post_suspend(int suspend_cancelled); |
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void xen_timer_resume(void); |
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void xen_arch_resume(void); |
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void xen_arch_suspend(void); |
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void xen_reboot(int reason); |
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void xen_resume_notifier_register(struct notifier_block *nb); |
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void xen_resume_notifier_unregister(struct notifier_block *nb); |
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bool xen_vcpu_stolen(int vcpu); |
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void xen_setup_runstate_info(int cpu); |
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void xen_time_setup_guest(void); |
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void xen_manage_runstate_time(int action); |
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void xen_get_runstate_snapshot(struct vcpu_runstate_info *res); |
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u64 xen_steal_clock(int cpu); |
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int xen_setup_shutdown_event(void); |
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extern unsigned long *xen_contiguous_bitmap; |
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#if defined(CONFIG_XEN_PV) || defined(CONFIG_ARM) || defined(CONFIG_ARM64) |
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int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order, |
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unsigned int address_bits, |
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dma_addr_t *dma_handle); |
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void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order); |
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#endif |
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#if defined(CONFIG_XEN_PV) |
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int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr, |
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xen_pfn_t *pfn, int nr, int *err_ptr, pgprot_t prot, |
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unsigned int domid, bool no_translate); |
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#else |
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static inline int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr, |
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xen_pfn_t *pfn, int nr, int *err_ptr, |
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pgprot_t prot, unsigned int domid, |
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bool no_translate) |
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{ |
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BUG(); |
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return 0; |
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} |
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#endif |
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struct vm_area_struct; |
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#ifdef CONFIG_XEN_AUTO_XLATE |
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int xen_xlate_remap_gfn_array(struct vm_area_struct *vma, |
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unsigned long addr, |
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xen_pfn_t *gfn, int nr, |
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int *err_ptr, pgprot_t prot, |
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unsigned int domid, |
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struct page **pages); |
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int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma, |
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int nr, struct page **pages); |
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#else |
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/* |
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* These two functions are called from arch/x86/xen/mmu.c and so stubs |
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* are needed for a configuration not specifying CONFIG_XEN_AUTO_XLATE. |
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*/ |
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static inline int xen_xlate_remap_gfn_array(struct vm_area_struct *vma, |
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unsigned long addr, |
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xen_pfn_t *gfn, int nr, |
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int *err_ptr, pgprot_t prot, |
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unsigned int domid, |
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struct page **pages) |
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{ |
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return -EOPNOTSUPP; |
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} |
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static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma, |
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int nr, struct page **pages) |
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{ |
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return -EOPNOTSUPP; |
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} |
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#endif |
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int xen_remap_vma_range(struct vm_area_struct *vma, unsigned long addr, |
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unsigned long len); |
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/* |
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* xen_remap_domain_gfn_array() - map an array of foreign frames by gfn |
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* @vma: VMA to map the pages into |
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* @addr: Address at which to map the pages |
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* @gfn: Array of GFNs to map |
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* @nr: Number entries in the GFN array |
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* @err_ptr: Returns per-GFN error status. |
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* @prot: page protection mask |
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* @domid: Domain owning the pages |
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* @pages: Array of pages if this domain has an auto-translated physmap |
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* |
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* @gfn and @err_ptr may point to the same buffer, the GFNs will be |
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* overwritten by the error codes after they are mapped. |
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* |
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* Returns the number of successfully mapped frames, or a -ve error |
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* code. |
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*/ |
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static inline int xen_remap_domain_gfn_array(struct vm_area_struct *vma, |
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unsigned long addr, |
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xen_pfn_t *gfn, int nr, |
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int *err_ptr, pgprot_t prot, |
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unsigned int domid, |
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struct page **pages) |
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{ |
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if (xen_feature(XENFEAT_auto_translated_physmap)) |
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return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr, |
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prot, domid, pages); |
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/* We BUG_ON because it's a programmer error to pass a NULL err_ptr, |
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* and the consequences later is quite hard to detect what the actual |
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* cause of "wrong memory was mapped in". |
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*/ |
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BUG_ON(err_ptr == NULL); |
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return xen_remap_pfn(vma, addr, gfn, nr, err_ptr, prot, domid, |
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false); |
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} |
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/* |
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* xen_remap_domain_mfn_array() - map an array of foreign frames by mfn |
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* @vma: VMA to map the pages into |
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* @addr: Address at which to map the pages |
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* @mfn: Array of MFNs to map |
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* @nr: Number entries in the MFN array |
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* @err_ptr: Returns per-MFN error status. |
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* @prot: page protection mask |
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* @domid: Domain owning the pages |
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* |
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* @mfn and @err_ptr may point to the same buffer, the MFNs will be |
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* overwritten by the error codes after they are mapped. |
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* |
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* Returns the number of successfully mapped frames, or a -ve error |
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* code. |
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*/ |
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static inline int xen_remap_domain_mfn_array(struct vm_area_struct *vma, |
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unsigned long addr, xen_pfn_t *mfn, |
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int nr, int *err_ptr, |
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pgprot_t prot, unsigned int domid) |
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{ |
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if (xen_feature(XENFEAT_auto_translated_physmap)) |
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return -EOPNOTSUPP; |
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return xen_remap_pfn(vma, addr, mfn, nr, err_ptr, prot, domid, |
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true); |
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} |
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/* xen_remap_domain_gfn_range() - map a range of foreign frames |
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* @vma: VMA to map the pages into |
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* @addr: Address at which to map the pages |
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* @gfn: First GFN to map. |
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* @nr: Number frames to map |
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* @prot: page protection mask |
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* @domid: Domain owning the pages |
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* @pages: Array of pages if this domain has an auto-translated physmap |
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* |
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* Returns the number of successfully mapped frames, or a -ve error |
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* code. |
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*/ |
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static inline int xen_remap_domain_gfn_range(struct vm_area_struct *vma, |
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unsigned long addr, |
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xen_pfn_t gfn, int nr, |
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pgprot_t prot, unsigned int domid, |
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struct page **pages) |
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{ |
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if (xen_feature(XENFEAT_auto_translated_physmap)) |
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return -EOPNOTSUPP; |
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return xen_remap_pfn(vma, addr, &gfn, nr, NULL, prot, domid, false); |
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} |
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int xen_unmap_domain_gfn_range(struct vm_area_struct *vma, |
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int numpgs, struct page **pages); |
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int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr, |
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unsigned long nr_grant_frames); |
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bool xen_running_on_version_or_later(unsigned int major, unsigned int minor); |
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void xen_efi_runtime_setup(void); |
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#if defined(CONFIG_XEN_PV) && !defined(CONFIG_PREEMPTION) |
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DECLARE_PER_CPU(bool, xen_in_preemptible_hcall); |
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static inline void xen_preemptible_hcall_begin(void) |
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{ |
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__this_cpu_write(xen_in_preemptible_hcall, true); |
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} |
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static inline void xen_preemptible_hcall_end(void) |
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{ |
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__this_cpu_write(xen_in_preemptible_hcall, false); |
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} |
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#else |
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static inline void xen_preemptible_hcall_begin(void) { } |
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static inline void xen_preemptible_hcall_end(void) { } |
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#endif /* CONFIG_XEN_PV && !CONFIG_PREEMPTION */ |
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#endif /* INCLUDE_XEN_OPS_H */
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