|
@@ -0,0 +1,155 @@
|
|
|
+/******************************************************************************
|
|
|
+ * arch/ia64/xen/grant-table.c
|
|
|
+ *
|
|
|
+ * Copyright (c) 2006 Isaku Yamahata <yamahata at valinux co jp>
|
|
|
+ * VA Linux Systems Japan K.K.
|
|
|
+ *
|
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
|
+ * it under the terms of the GNU General Public License as published by
|
|
|
+ * the Free Software Foundation; either version 2 of the License, or
|
|
|
+ * (at your option) any later version.
|
|
|
+ *
|
|
|
+ * This program is distributed in the hope that it will be useful,
|
|
|
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
+ * GNU General Public License for more details.
|
|
|
+ *
|
|
|
+ * You should have received a copy of the GNU General Public License
|
|
|
+ * along with this program; if not, write to the Free Software
|
|
|
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
+ *
|
|
|
+ */
|
|
|
+
|
|
|
+#include <linux/module.h>
|
|
|
+#include <linux/vmalloc.h>
|
|
|
+#include <linux/mm.h>
|
|
|
+
|
|
|
+#include <xen/interface/xen.h>
|
|
|
+#include <xen/interface/memory.h>
|
|
|
+#include <xen/grant_table.h>
|
|
|
+
|
|
|
+#include <asm/xen/hypervisor.h>
|
|
|
+
|
|
|
+struct vm_struct *xen_alloc_vm_area(unsigned long size)
|
|
|
+{
|
|
|
+ int order;
|
|
|
+ unsigned long virt;
|
|
|
+ unsigned long nr_pages;
|
|
|
+ struct vm_struct *area;
|
|
|
+
|
|
|
+ order = get_order(size);
|
|
|
+ virt = __get_free_pages(GFP_KERNEL, order);
|
|
|
+ if (virt == 0)
|
|
|
+ goto err0;
|
|
|
+ nr_pages = 1 << order;
|
|
|
+ scrub_pages(virt, nr_pages);
|
|
|
+
|
|
|
+ area = kmalloc(sizeof(*area), GFP_KERNEL);
|
|
|
+ if (area == NULL)
|
|
|
+ goto err1;
|
|
|
+
|
|
|
+ area->flags = VM_IOREMAP;
|
|
|
+ area->addr = (void *)virt;
|
|
|
+ area->size = size;
|
|
|
+ area->pages = NULL;
|
|
|
+ area->nr_pages = nr_pages;
|
|
|
+ area->phys_addr = 0; /* xenbus_map_ring_valloc uses this field! */
|
|
|
+
|
|
|
+ return area;
|
|
|
+
|
|
|
+err1:
|
|
|
+ free_pages(virt, order);
|
|
|
+err0:
|
|
|
+ return NULL;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL_GPL(xen_alloc_vm_area);
|
|
|
+
|
|
|
+void xen_free_vm_area(struct vm_struct *area)
|
|
|
+{
|
|
|
+ unsigned int order = get_order(area->size);
|
|
|
+ unsigned long i;
|
|
|
+ unsigned long phys_addr = __pa(area->addr);
|
|
|
+
|
|
|
+ /* This area is used for foreign page mappping.
|
|
|
+ * So underlying machine page may not be assigned. */
|
|
|
+ for (i = 0; i < (1 << order); i++) {
|
|
|
+ unsigned long ret;
|
|
|
+ unsigned long gpfn = (phys_addr >> PAGE_SHIFT) + i;
|
|
|
+ struct xen_memory_reservation reservation = {
|
|
|
+ .nr_extents = 1,
|
|
|
+ .address_bits = 0,
|
|
|
+ .extent_order = 0,
|
|
|
+ .domid = DOMID_SELF
|
|
|
+ };
|
|
|
+ set_xen_guest_handle(reservation.extent_start, &gpfn);
|
|
|
+ ret = HYPERVISOR_memory_op(XENMEM_populate_physmap,
|
|
|
+ &reservation);
|
|
|
+ BUG_ON(ret != 1);
|
|
|
+ }
|
|
|
+ free_pages((unsigned long)area->addr, order);
|
|
|
+ kfree(area);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL_GPL(xen_free_vm_area);
|
|
|
+
|
|
|
+
|
|
|
+/****************************************************************************
|
|
|
+ * grant table hack
|
|
|
+ * cmd: GNTTABOP_xxx
|
|
|
+ */
|
|
|
+
|
|
|
+int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gframes,
|
|
|
+ unsigned long max_nr_gframes,
|
|
|
+ struct grant_entry **__shared)
|
|
|
+{
|
|
|
+ *__shared = __va(frames[0] << PAGE_SHIFT);
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+void arch_gnttab_unmap_shared(struct grant_entry *shared,
|
|
|
+ unsigned long nr_gframes)
|
|
|
+{
|
|
|
+ /* nothing */
|
|
|
+}
|
|
|
+
|
|
|
+static void
|
|
|
+gnttab_map_grant_ref_pre(struct gnttab_map_grant_ref *uop)
|
|
|
+{
|
|
|
+ uint32_t flags;
|
|
|
+
|
|
|
+ flags = uop->flags;
|
|
|
+
|
|
|
+ if (flags & GNTMAP_host_map) {
|
|
|
+ if (flags & GNTMAP_application_map) {
|
|
|
+ printk(KERN_DEBUG
|
|
|
+ "GNTMAP_application_map is not supported yet: "
|
|
|
+ "flags 0x%x\n", flags);
|
|
|
+ BUG();
|
|
|
+ }
|
|
|
+ if (flags & GNTMAP_contains_pte) {
|
|
|
+ printk(KERN_DEBUG
|
|
|
+ "GNTMAP_contains_pte is not supported yet: "
|
|
|
+ "flags 0x%x\n", flags);
|
|
|
+ BUG();
|
|
|
+ }
|
|
|
+ } else if (flags & GNTMAP_device_map) {
|
|
|
+ printk("GNTMAP_device_map is not supported yet 0x%x\n", flags);
|
|
|
+ BUG(); /* not yet. actually this flag is not used. */
|
|
|
+ } else {
|
|
|
+ BUG();
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+int
|
|
|
+HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count)
|
|
|
+{
|
|
|
+ if (cmd == GNTTABOP_map_grant_ref) {
|
|
|
+ unsigned int i;
|
|
|
+ for (i = 0; i < count; i++) {
|
|
|
+ gnttab_map_grant_ref_pre(
|
|
|
+ (struct gnttab_map_grant_ref *)uop + i);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ return xencomm_hypercall_grant_table_op(cmd, uop, count);
|
|
|
+}
|
|
|
+
|
|
|
+EXPORT_SYMBOL(HYPERVISOR_grant_table_op);
|