162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci 362306a36Sopenharmony_ci#include <linux/pfn.h> 462306a36Sopenharmony_ci#include <asm/xen/page.h> 562306a36Sopenharmony_ci#include <asm/xen/hypercall.h> 662306a36Sopenharmony_ci#include <xen/interface/memory.h> 762306a36Sopenharmony_ci 862306a36Sopenharmony_ci#include "multicalls.h" 962306a36Sopenharmony_ci#include "mmu.h" 1062306a36Sopenharmony_ci 1162306a36Sopenharmony_ciunsigned long arbitrary_virt_to_mfn(void *vaddr) 1262306a36Sopenharmony_ci{ 1362306a36Sopenharmony_ci xmaddr_t maddr = arbitrary_virt_to_machine(vaddr); 1462306a36Sopenharmony_ci 1562306a36Sopenharmony_ci return PFN_DOWN(maddr.maddr); 1662306a36Sopenharmony_ci} 1762306a36Sopenharmony_ci 1862306a36Sopenharmony_cixmaddr_t arbitrary_virt_to_machine(void *vaddr) 1962306a36Sopenharmony_ci{ 2062306a36Sopenharmony_ci unsigned long address = (unsigned long)vaddr; 2162306a36Sopenharmony_ci unsigned int level; 2262306a36Sopenharmony_ci pte_t *pte; 2362306a36Sopenharmony_ci unsigned offset; 2462306a36Sopenharmony_ci 2562306a36Sopenharmony_ci /* 2662306a36Sopenharmony_ci * if the PFN is in the linear mapped vaddr range, we can just use 2762306a36Sopenharmony_ci * the (quick) virt_to_machine() p2m lookup 2862306a36Sopenharmony_ci */ 2962306a36Sopenharmony_ci if (virt_addr_valid(vaddr)) 3062306a36Sopenharmony_ci return virt_to_machine(vaddr); 3162306a36Sopenharmony_ci 3262306a36Sopenharmony_ci /* otherwise we have to do a (slower) full page-table walk */ 3362306a36Sopenharmony_ci 3462306a36Sopenharmony_ci pte = lookup_address(address, &level); 3562306a36Sopenharmony_ci BUG_ON(pte == NULL); 3662306a36Sopenharmony_ci offset = address & ~PAGE_MASK; 3762306a36Sopenharmony_ci return XMADDR(((phys_addr_t)pte_mfn(*pte) << PAGE_SHIFT) + offset); 3862306a36Sopenharmony_ci} 3962306a36Sopenharmony_ciEXPORT_SYMBOL_GPL(arbitrary_virt_to_machine); 4062306a36Sopenharmony_ci 4162306a36Sopenharmony_ci/* Returns: 0 success */ 4262306a36Sopenharmony_ciint xen_unmap_domain_gfn_range(struct vm_area_struct *vma, 4362306a36Sopenharmony_ci int nr, struct page **pages) 4462306a36Sopenharmony_ci{ 4562306a36Sopenharmony_ci if (xen_feature(XENFEAT_auto_translated_physmap)) 4662306a36Sopenharmony_ci return xen_xlate_unmap_gfn_range(vma, nr, pages); 4762306a36Sopenharmony_ci 4862306a36Sopenharmony_ci if (!pages) 4962306a36Sopenharmony_ci return 0; 5062306a36Sopenharmony_ci 5162306a36Sopenharmony_ci return -EINVAL; 5262306a36Sopenharmony_ci} 5362306a36Sopenharmony_ciEXPORT_SYMBOL_GPL(xen_unmap_domain_gfn_range); 54