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-rw-r--r--arch/arm/xen/enlighten.c104
1 files changed, 16 insertions, 88 deletions
diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
index 263a2044c65b..224081ccc92f 100644
--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -53,105 +53,33 @@ EXPORT_SYMBOL_GPL(xen_platform_pci_unplug);
static __read_mostly int xen_events_irq = -1;
-/* map fgmfn of domid to lpfn in the current domain */
-static int map_foreign_page(unsigned long lpfn, unsigned long fgmfn,
- unsigned int domid)
+int xen_remap_domain_mfn_array(struct vm_area_struct *vma,
+ unsigned long addr,
+ xen_pfn_t *mfn, int nr,
+ int *err_ptr, pgprot_t prot,
+ unsigned domid,
+ struct page **pages)
{
- int rc;
- struct xen_add_to_physmap_range xatp = {
- .domid = DOMID_SELF,
- .foreign_domid = domid,
- .size = 1,
- .space = XENMAPSPACE_gmfn_foreign,
- };
- xen_ulong_t idx = fgmfn;
- xen_pfn_t gpfn = lpfn;
- int err = 0;
-
- set_xen_guest_handle(xatp.idxs, &idx);
- set_xen_guest_handle(xatp.gpfns, &gpfn);
- set_xen_guest_handle(xatp.errs, &err);
-
- rc = HYPERVISOR_memory_op(XENMEM_add_to_physmap_range, &xatp);
- if (rc || err) {
- pr_warn("Failed to map pfn to mfn rc:%d:%d pfn:%lx mfn:%lx\n",
- rc, err, lpfn, fgmfn);
- return 1;
- }
- return 0;
-}
-
-struct remap_data {
- xen_pfn_t fgmfn; /* foreign domain's gmfn */
- pgprot_t prot;
- domid_t domid;
- struct vm_area_struct *vma;
- int index;
- struct page **pages;
- struct xen_remap_mfn_info *info;
-};
-
-static int remap_pte_fn(pte_t *ptep, pgtable_t token, unsigned long addr,
- void *data)
-{
- struct remap_data *info = data;
- struct page *page = info->pages[info->index++];
- unsigned long pfn = page_to_pfn(page);
- pte_t pte = pte_mkspecial(pfn_pte(pfn, info->prot));
-
- if (map_foreign_page(pfn, info->fgmfn, info->domid))
- return -EFAULT;
- set_pte_at(info->vma->vm_mm, addr, ptep, pte);
-
- return 0;
+ return xen_xlate_remap_gfn_array(vma, addr, mfn, nr, err_ptr,
+ prot, domid, pages);
}
+EXPORT_SYMBOL_GPL(xen_remap_domain_mfn_array);
+/* Not used by XENFEAT_auto_translated guests. */
int xen_remap_domain_mfn_range(struct vm_area_struct *vma,
- unsigned long addr,
- xen_pfn_t mfn, int nr,
- pgprot_t prot, unsigned domid,
- struct page **pages)
+ unsigned long addr,
+ xen_pfn_t mfn, int nr,
+ pgprot_t prot, unsigned domid,
+ struct page **pages)
{
- int err;
- struct remap_data data;
-
- /* TBD: Batching, current sole caller only does page at a time */
- if (nr > 1)
- return -EINVAL;
-
- data.fgmfn = mfn;
- data.prot = prot;
- data.domid = domid;
- data.vma = vma;
- data.index = 0;
- data.pages = pages;
- err = apply_to_page_range(vma->vm_mm, addr, nr << PAGE_SHIFT,
- remap_pte_fn, &data);
- return err;
+ return -ENOSYS;
}
EXPORT_SYMBOL_GPL(xen_remap_domain_mfn_range);
int xen_unmap_domain_mfn_range(struct vm_area_struct *vma,
int nr, struct page **pages)
{
- int i;
-
- for (i = 0; i < nr; i++) {
- struct xen_remove_from_physmap xrp;
- unsigned long rc, pfn;
-
- pfn = page_to_pfn(pages[i]);
-
- xrp.domid = DOMID_SELF;
- xrp.gpfn = pfn;
- rc = HYPERVISOR_memory_op(XENMEM_remove_from_physmap, &xrp);
- if (rc) {
- pr_warn("Failed to unmap pfn:%lx rc:%ld\n",
- pfn, rc);
- return rc;
- }
- }
- return 0;
+ return xen_xlate_unmap_gfn_range(vma, nr, pages);
}
EXPORT_SYMBOL_GPL(xen_unmap_domain_mfn_range);