Juergen Gross | 901d209 | 2018-08-28 09:40:15 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | |
Vitaly Kuznetsov | 7e0563d | 2017-04-04 14:48:17 +0200 | [diff] [blame] | 3 | #include <linux/pfn.h> |
| 4 | #include <asm/xen/page.h> |
Jeremy Fitzhardinge | 3b827c1 | 2007-07-17 18:37:04 -0700 | [diff] [blame] | 5 | #include <asm/xen/hypercall.h> |
Jeremy Fitzhardinge | c0011db | 2010-02-04 14:46:34 -0800 | [diff] [blame] | 6 | #include <xen/interface/memory.h> |
Jeremy Fitzhardinge | 3b827c1 | 2007-07-17 18:37:04 -0700 | [diff] [blame] | 7 | |
Jeremy Fitzhardinge | f4f97b3 | 2007-07-17 18:37:05 -0700 | [diff] [blame] | 8 | #include "multicalls.h" |
Jeremy Fitzhardinge | 3b827c1 | 2007-07-17 18:37:04 -0700 | [diff] [blame] | 9 | #include "mmu.h" |
Jeremy Fitzhardinge | 994025c | 2008-08-20 17:02:19 -0700 | [diff] [blame] | 10 | |
Jeremy Fitzhardinge | 9976b39 | 2009-02-27 09:19:26 -0800 | [diff] [blame] | 11 | unsigned long arbitrary_virt_to_mfn(void *vaddr) |
| 12 | { |
| 13 | xmaddr_t maddr = arbitrary_virt_to_machine(vaddr); |
| 14 | |
| 15 | return PFN_DOWN(maddr.maddr); |
| 16 | } |
| 17 | |
Jeremy Fitzhardinge | ce803e7 | 2008-07-08 15:06:55 -0700 | [diff] [blame] | 18 | xmaddr_t arbitrary_virt_to_machine(void *vaddr) |
Jeremy Fitzhardinge | 3b827c1 | 2007-07-17 18:37:04 -0700 | [diff] [blame] | 19 | { |
Jeremy Fitzhardinge | ce803e7 | 2008-07-08 15:06:55 -0700 | [diff] [blame] | 20 | unsigned long address = (unsigned long)vaddr; |
Harvey Harrison | da7bfc5 | 2008-02-09 23:24:08 +0100 | [diff] [blame] | 21 | unsigned int level; |
Chris Lalancette | 9f32d21 | 2008-10-23 17:40:25 -0700 | [diff] [blame] | 22 | pte_t *pte; |
| 23 | unsigned offset; |
Jeremy Fitzhardinge | 3b827c1 | 2007-07-17 18:37:04 -0700 | [diff] [blame] | 24 | |
Chris Lalancette | 9f32d21 | 2008-10-23 17:40:25 -0700 | [diff] [blame] | 25 | /* |
| 26 | * if the PFN is in the linear mapped vaddr range, we can just use |
| 27 | * the (quick) virt_to_machine() p2m lookup |
| 28 | */ |
| 29 | if (virt_addr_valid(vaddr)) |
| 30 | return virt_to_machine(vaddr); |
| 31 | |
| 32 | /* otherwise we have to do a (slower) full page-table walk */ |
| 33 | |
| 34 | pte = lookup_address(address, &level); |
Jeremy Fitzhardinge | 3b827c1 | 2007-07-17 18:37:04 -0700 | [diff] [blame] | 35 | BUG_ON(pte == NULL); |
Chris Lalancette | 9f32d21 | 2008-10-23 17:40:25 -0700 | [diff] [blame] | 36 | offset = address & ~PAGE_MASK; |
Jeremy Fitzhardinge | ebd879e | 2008-07-08 15:06:54 -0700 | [diff] [blame] | 37 | return XMADDR(((phys_addr_t)pte_mfn(*pte) << PAGE_SHIFT) + offset); |
Jeremy Fitzhardinge | 3b827c1 | 2007-07-17 18:37:04 -0700 | [diff] [blame] | 38 | } |
Stephen Rothwell | de23be5 | 2011-01-15 10:36:26 +1100 | [diff] [blame] | 39 | EXPORT_SYMBOL_GPL(arbitrary_virt_to_machine); |
Jeremy Fitzhardinge | 3b827c1 | 2007-07-17 18:37:04 -0700 | [diff] [blame] | 40 | |
Ian Campbell | 9a032e3 | 2012-10-17 13:37:49 -0700 | [diff] [blame] | 41 | /* Returns: 0 success */ |
Julien Grall | a13d720 | 2015-08-07 17:34:41 +0100 | [diff] [blame] | 42 | int xen_unmap_domain_gfn_range(struct vm_area_struct *vma, |
Paul Durrant | ec4001c | 2017-11-03 17:04:11 +0000 | [diff] [blame] | 43 | int nr, struct page **pages) |
Ian Campbell | 9a032e3 | 2012-10-17 13:37:49 -0700 | [diff] [blame] | 44 | { |
Paul Durrant | ec4001c | 2017-11-03 17:04:11 +0000 | [diff] [blame] | 45 | if (xen_feature(XENFEAT_auto_translated_physmap)) |
| 46 | return xen_xlate_unmap_gfn_range(vma, nr, pages); |
| 47 | |
| 48 | if (!pages) |
Ian Campbell | 9a032e3 | 2012-10-17 13:37:49 -0700 | [diff] [blame] | 49 | return 0; |
| 50 | |
| 51 | return -EINVAL; |
| 52 | } |
Julien Grall | a13d720 | 2015-08-07 17:34:41 +0100 | [diff] [blame] | 53 | EXPORT_SYMBOL_GPL(xen_unmap_domain_gfn_range); |