static int alloc_magic_pages(struct xc_dom_image *dom)
{
struct ft_cxt devtree;
void *guest_devtree;
unsigned long shadow_mb;
int rma_pages;
int rc;
/* Allocate special pages from the end of the RMA. */
rma_pages = 1 << (dom->realmodearea_log - PAGE_SHIFT);
dom->shared_info_pfn = --rma_pages;
dom->console_pfn = --rma_pages;
dom->xenstore_pfn = --rma_pages;
/* Gather shadow allocation info for the device tree. */
rc = xc_shadow_control(dom->guest_xc, dom->guest_domid,
XEN_DOMCTL_SHADOW_OP_GET_ALLOCATION, NULL, 0,
&shadow_mb, 0, NULL);
if (rc < 0 || shadow_mb == 0) {
xc_dom_printf("Couldn't get shadow allocation size or it was 0.\n");
return rc;
}
/* Build device tree. */
rc = make_devtree(&devtree, dom, shadow_mb);
if (rc < 0) {
xc_dom_printf("Failed to create flattened device tree.\n");
return rc;
}
/* Find a spot for it. */
rc = xc_dom_alloc_segment(dom, &dom->devicetree_seg, "devtree", 0,
devtree.bph->totalsize);
if (rc)
goto out;
/* Copy the device tree into place. */
guest_devtree = xc_dom_seg_to_ptr(dom, &dom->devicetree_seg);
if (!guest_devtree) {
xc_dom_printf("Couldn't map guest memory for device tree.\n");
rc = -1;
goto out;
}
memcpy(guest_devtree, devtree.bph, devtree.bph->totalsize);
out:
free_devtree(&devtree);
return rc;
}
int xc_dom_build_image(struct xc_dom_image *dom)
{
unsigned int page_size;
xc_dom_printf("%s: called\n", __FUNCTION__);
/* check for arch hooks */
if ( dom->arch_hooks == NULL )
{
xc_dom_panic(XC_INTERNAL_ERROR, "%s: arch hooks not set\n",
__FUNCTION__);
goto err;
}
page_size = XC_DOM_PAGE_SIZE(dom);
/* load kernel */
if ( xc_dom_alloc_segment(dom, &dom->kernel_seg, "kernel",
dom->kernel_seg.vstart,
dom->kernel_seg.vend -
dom->kernel_seg.vstart) != 0 )
goto err;
if ( dom->kernel_loader->loader(dom) != 0 )
goto err;
/* load ramdisk */
if ( dom->ramdisk_blob )
{
size_t unziplen, ramdisklen;
void *ramdiskmap;
unziplen = xc_dom_check_gzip(dom->ramdisk_blob, dom->ramdisk_size);
ramdisklen = unziplen ? unziplen : dom->ramdisk_size;
if ( xc_dom_alloc_segment(dom, &dom->ramdisk_seg, "ramdisk", 0,
ramdisklen) != 0 )
goto err;
ramdiskmap = xc_dom_seg_to_ptr(dom, &dom->ramdisk_seg);
if ( unziplen )
{
if ( xc_dom_do_gunzip(dom->ramdisk_blob, dom->ramdisk_size,
ramdiskmap, ramdisklen) == -1 )
goto err;
}
else
memcpy(ramdiskmap, dom->ramdisk_blob, dom->ramdisk_size);
}
/* allocate other pages */
if ( dom->arch_hooks->alloc_magic_pages(dom) != 0 )
goto err;
if ( dom->arch_hooks->count_pgtables )
{
dom->arch_hooks->count_pgtables(dom);
if ( (dom->pgtables > 0) &&
(xc_dom_alloc_segment(dom, &dom->pgtables_seg, "page tables", 0,
dom->pgtables * page_size) != 0) )
goto err;
}
if ( dom->alloc_bootstack )
dom->bootstack_pfn = xc_dom_alloc_page(dom, "boot stack");
xc_dom_printf("%-20s: virt_alloc_end : 0x%" PRIx64 "\n",
__FUNCTION__, dom->virt_alloc_end);
xc_dom_printf("%-20s: virt_pgtab_end : 0x%" PRIx64 "\n",
__FUNCTION__, dom->virt_pgtab_end);
return 0;
err:
return -1;
}
