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120 lines
3.2 KiB
120 lines
3.2 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_ARM_XEN_PAGE_H |
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#define _ASM_ARM_XEN_PAGE_H |
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#include <asm/page.h> |
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#include <linux/pfn.h> |
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#include <linux/types.h> |
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#include <linux/dma-mapping.h> |
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#include <linux/pgtable.h> |
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#include <xen/xen.h> |
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#include <xen/interface/grant_table.h> |
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#define phys_to_machine_mapping_valid(pfn) (1) |
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/* Xen machine address */ |
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typedef struct xmaddr { |
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phys_addr_t maddr; |
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} xmaddr_t; |
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/* Xen pseudo-physical address */ |
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typedef struct xpaddr { |
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phys_addr_t paddr; |
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} xpaddr_t; |
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#define XMADDR(x) ((xmaddr_t) { .maddr = (x) }) |
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#define XPADDR(x) ((xpaddr_t) { .paddr = (x) }) |
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#define INVALID_P2M_ENTRY (~0UL) |
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/* |
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* The pseudo-physical frame (pfn) used in all the helpers is always based |
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* on Xen page granularity (i.e 4KB). |
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* |
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* A Linux page may be split across multiple non-contiguous Xen page so we |
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* have to keep track with frame based on 4KB page granularity. |
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* |
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* PV drivers should never make a direct usage of those helpers (particularly |
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* pfn_to_gfn and gfn_to_pfn). |
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*/ |
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unsigned long __pfn_to_mfn(unsigned long pfn); |
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extern struct rb_root phys_to_mach; |
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/* Pseudo-physical <-> Guest conversion */ |
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static inline unsigned long pfn_to_gfn(unsigned long pfn) |
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{ |
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return pfn; |
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} |
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static inline unsigned long gfn_to_pfn(unsigned long gfn) |
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{ |
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return gfn; |
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} |
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/* Pseudo-physical <-> BUS conversion */ |
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static inline unsigned long pfn_to_bfn(unsigned long pfn) |
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{ |
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unsigned long mfn; |
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if (phys_to_mach.rb_node != NULL) { |
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mfn = __pfn_to_mfn(pfn); |
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if (mfn != INVALID_P2M_ENTRY) |
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return mfn; |
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} |
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return pfn; |
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} |
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static inline unsigned long bfn_to_pfn(unsigned long bfn) |
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{ |
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return bfn; |
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} |
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#define bfn_to_local_pfn(bfn) bfn_to_pfn(bfn) |
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/* VIRT <-> GUEST conversion */ |
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#define virt_to_gfn(v) \ |
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({ \ |
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WARN_ON_ONCE(!virt_addr_valid(v)); \ |
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pfn_to_gfn(virt_to_phys(v) >> XEN_PAGE_SHIFT); \ |
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}) |
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#define gfn_to_virt(m) (__va(gfn_to_pfn(m) << XEN_PAGE_SHIFT)) |
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#define percpu_to_gfn(v) \ |
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(pfn_to_gfn(per_cpu_ptr_to_phys(v) >> XEN_PAGE_SHIFT)) |
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/* Only used in PV code. But ARM guests are always HVM. */ |
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static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr) |
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{ |
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BUG(); |
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} |
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extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops, |
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struct gnttab_map_grant_ref *kmap_ops, |
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struct page **pages, unsigned int count); |
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extern int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops, |
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struct gnttab_unmap_grant_ref *kunmap_ops, |
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struct page **pages, unsigned int count); |
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bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn); |
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bool __set_phys_to_machine_multi(unsigned long pfn, unsigned long mfn, |
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unsigned long nr_pages); |
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static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn) |
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{ |
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return __set_phys_to_machine(pfn, mfn); |
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} |
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#define xen_remap(cookie, size) ioremap_cache((cookie), (size)) |
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#define xen_unmap(cookie) iounmap((cookie)) |
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bool xen_arch_need_swiotlb(struct device *dev, |
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phys_addr_t phys, |
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dma_addr_t dev_addr); |
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unsigned long xen_get_swiotlb_free_pages(unsigned int order); |
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#endif /* _ASM_ARM_XEN_PAGE_H */
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