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Commit | Line | Data |
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901d209a JG |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | ||
7e0563de VK |
3 | #include <linux/pfn.h> |
4 | #include <asm/xen/page.h> | |
5 | #include <asm/xen/hypercall.h> | |
6 | #include <xen/interface/memory.h> | |
70e61199 | 7 | |
7e0563de VK |
8 | #include "multicalls.h" |
9 | #include "mmu.h" | |
70e61199 | 10 | |
7e0563de | 11 | unsigned long arbitrary_virt_to_mfn(void *vaddr) |
70e61199 | 12 | { |
7e0563de | 13 | xmaddr_t maddr = arbitrary_virt_to_machine(vaddr); |
70e61199 | 14 | |
7e0563de | 15 | return PFN_DOWN(maddr.maddr); |
70e61199 JG |
16 | } |
17 | ||
7e0563de | 18 | xmaddr_t arbitrary_virt_to_machine(void *vaddr) |
5b5c1af1 | 19 | { |
7e0563de VK |
20 | unsigned long address = (unsigned long)vaddr; |
21 | unsigned int level; | |
22 | pte_t *pte; | |
23 | unsigned offset; | |
5b5c1af1 IC |
24 | |
25 | /* | |
7e0563de VK |
26 | * if the PFN is in the linear mapped vaddr range, we can just use |
27 | * the (quick) virt_to_machine() p2m lookup | |
5b5c1af1 | 28 | */ |
7e0563de VK |
29 | if (virt_addr_valid(vaddr)) |
30 | return virt_to_machine(vaddr); | |
20f36e03 | 31 | |
7e0563de | 32 | /* otherwise we have to do a (slower) full page-table walk */ |
d2cb2145 | 33 | |
7e0563de VK |
34 | pte = lookup_address(address, &level); |
35 | BUG_ON(pte == NULL); | |
36 | offset = address & ~PAGE_MASK; | |
37 | return XMADDR(((phys_addr_t)pte_mfn(*pte) << PAGE_SHIFT) + offset); | |
030cb6c0 | 38 | } |
7e0563de | 39 | EXPORT_SYMBOL_GPL(arbitrary_virt_to_machine); |
319f3ba5 | 40 | |
9a032e39 | 41 | /* Returns: 0 success */ |
a13d7201 | 42 | int xen_unmap_domain_gfn_range(struct vm_area_struct *vma, |
ec4001c3 | 43 | int nr, struct page **pages) |
9a032e39 | 44 | { |
ec4001c3 PD |
45 | if (xen_feature(XENFEAT_auto_translated_physmap)) |
46 | return xen_xlate_unmap_gfn_range(vma, nr, pages); | |
47 | ||
48 | if (!pages) | |
9a032e39 IC |
49 | return 0; |
50 | ||
51 | return -EINVAL; | |
52 | } | |
a13d7201 | 53 | EXPORT_SYMBOL_GPL(xen_unmap_domain_gfn_range); |