int xc_dom_boot_image(struct xc_dom_image *dom)
{
DECLARE_DOMCTL;
void *ctxt;
int rc;
xc_dom_printf("%s: called\n", __FUNCTION__);
/* misc ia64 stuff*/
if ( (rc = arch_setup_bootearly(dom)) != 0 )
return rc;
/* collect some info */
domctl.cmd = XEN_DOMCTL_getdomaininfo;
domctl.domain = dom->guest_domid;
rc = do_domctl(dom->guest_xc, &domctl);
if ( rc != 0 )
{
xc_dom_panic(XC_INTERNAL_ERROR,
"%s: getdomaininfo failed (rc=%d)\n", __FUNCTION__, rc);
return rc;
}
if ( domctl.domain != dom->guest_domid )
{
xc_dom_panic(XC_INTERNAL_ERROR,
"%s: Huh? domid mismatch (%d != %d)\n", __FUNCTION__,
domctl.domain, dom->guest_domid);
return -1;
}
dom->shared_info_mfn = domctl.u.getdomaininfo.shared_info_frame;
/* sanity checks */
if ( !xc_dom_compat_check(dom) )
return -1;
/* initial mm setup */
if ( (rc = xc_dom_update_guest_p2m(dom)) != 0 )
return rc;
if ( dom->arch_hooks->setup_pgtables )
if ( (rc = dom->arch_hooks->setup_pgtables(dom)) != 0 )
return rc;
if ( (rc = clear_page(dom, dom->console_pfn)) != 0 )
return rc;
if ( (rc = clear_page(dom, dom->xenstore_pfn)) != 0 )
return rc;
/* start info page */
if ( dom->arch_hooks->start_info )
dom->arch_hooks->start_info(dom);
/* hypercall page */
if ( (rc = setup_hypercall_page(dom)) != 0 )
return rc;
xc_dom_log_memory_footprint(dom);
/* misc x86 stuff */
if ( (rc = arch_setup_bootlate(dom)) != 0 )
return rc;
/* let the vm run */
ctxt = xc_dom_malloc(dom, PAGE_SIZE * 2 /* FIXME */ );
memset(ctxt, 0, PAGE_SIZE * 2);
if ( (rc = dom->arch_hooks->vcpu(dom, ctxt)) != 0 )
return rc;
xc_dom_unmap_all(dom);
rc = launch_vm(dom->guest_xc, dom->guest_domid, ctxt);
return rc;
}
void kexec(void *kernel, long kernel_size, void *module, long module_size, char *cmdline, unsigned long flags)
{
struct xc_dom_image *dom;
int rc;
domid_t domid = DOMID_SELF;
xen_pfn_t pfn;
xc_interface *xc_handle;
unsigned long i;
void *seg;
xen_pfn_t boot_page_mfn = virt_to_mfn(&_boot_page);
char features[] = "";
struct mmu_update *m2p_updates;
unsigned long nr_m2p_updates;
DEBUG("booting with cmdline %s\n", cmdline);
xc_handle = xc_interface_open(0,0,0);
dom = xc_dom_allocate(xc_handle, cmdline, features);
dom->allocate = kexec_allocate;
/* We are using guest owned memory, therefore no limits. */
xc_dom_kernel_max_size(dom, 0);
xc_dom_ramdisk_max_size(dom, 0);
dom->kernel_blob = kernel;
dom->kernel_size = kernel_size;
dom->ramdisk_blob = module;
dom->ramdisk_size = module_size;
dom->flags = flags;
dom->console_evtchn = start_info.console.domU.evtchn;
dom->xenstore_evtchn = start_info.store_evtchn;
tpm_hash2pcr(dom, cmdline);
if ( (rc = xc_dom_boot_xen_init(dom, xc_handle, domid)) != 0 ) {
grub_printf("xc_dom_boot_xen_init returned %d\n", rc);
errnum = ERR_BOOT_FAILURE;
goto out;
}
if ( (rc = xc_dom_parse_image(dom)) != 0 ) {
grub_printf("xc_dom_parse_image returned %d\n", rc);
errnum = ERR_BOOT_FAILURE;
goto out;
}
#ifdef __i386__
if (strcmp(dom->guest_type, "xen-3.0-x86_32p")) {
grub_printf("can only boot x86 32 PAE kernels, not %s\n", dom->guest_type);
errnum = ERR_EXEC_FORMAT;
goto out;
}
#endif
#ifdef __x86_64__
if (strcmp(dom->guest_type, "xen-3.0-x86_64")) {
grub_printf("can only boot x86 64 kernels, not %s\n", dom->guest_type);
errnum = ERR_EXEC_FORMAT;
goto out;
}
#endif
/* equivalent of xc_dom_mem_init */
dom->arch_hooks = xc_dom_find_arch_hooks(xc_handle, dom->guest_type);
dom->total_pages = start_info.nr_pages;
/* equivalent of arch_setup_meminit */
/* setup initial p2m */
dom->p2m_host = malloc(sizeof(*dom->p2m_host) * dom->total_pages);
/* Start with our current P2M */
for (i = 0; i < dom->total_pages; i++)
dom->p2m_host[i] = pfn_to_mfn(i);
if ( (rc = xc_dom_build_image(dom)) != 0 ) {
grub_printf("xc_dom_build_image returned %d\n", rc);
errnum = ERR_BOOT_FAILURE;
goto out;
}
/* copy hypercall page */
/* TODO: domctl instead, but requires privileges */
if (dom->parms.virt_hypercall != -1) {
pfn = PHYS_PFN(dom->parms.virt_hypercall - dom->parms.virt_base);
memcpy((void *) pages[pfn], hypercall_page, PAGE_SIZE);
}
/* Equivalent of xc_dom_boot_image */
dom->shared_info_mfn = PHYS_PFN(start_info.shared_info);
if (!xc_dom_compat_check(dom)) {
grub_printf("xc_dom_compat_check failed\n");
errnum = ERR_EXEC_FORMAT;
goto out;
}
/* Move current console, xenstore and boot MFNs to the allocated place */
do_exchange(dom, dom->console_pfn, start_info.console.domU.mfn);
do_exchange(dom, dom->xenstore_pfn, start_info.store_mfn);
DEBUG("virt base at %llx\n", dom->parms.virt_base);
DEBUG("bootstack_pfn %lx\n", dom->bootstack_pfn);
_boot_target = dom->parms.virt_base + PFN_PHYS(dom->bootstack_pfn);
DEBUG("_boot_target %lx\n", _boot_target);
do_exchange(dom, PHYS_PFN(_boot_target - dom->parms.virt_base),
virt_to_mfn(&_boot_page));
/* Make sure the bootstrap page table does not RW-map any of our current
* page table frames */
kexec_allocate(dom, dom->virt_pgtab_end);
if ( (rc = xc_dom_update_guest_p2m(dom))) {
grub_printf("xc_dom_update_guest_p2m returned %d\n", rc);
errnum = ERR_BOOT_FAILURE;
goto out;
}
if ( dom->arch_hooks->setup_pgtables )
if ( (rc = dom->arch_hooks->setup_pgtables(dom))) {
grub_printf("setup_pgtables returned %d\n", rc);
errnum = ERR_BOOT_FAILURE;
goto out;
}
/* start info page */
#undef start_info
if ( dom->arch_hooks->start_info )
dom->arch_hooks->start_info(dom);
#define start_info (start_info_union.start_info)
xc_dom_log_memory_footprint(dom);
/* Unmap libxc's projection of the boot page table */
seg = xc_dom_seg_to_ptr(dom, &dom->pgtables_seg);
munmap(seg, dom->pgtables_seg.vend - dom->pgtables_seg.vstart);
/* Unmap day0 pages to avoid having a r/w mapping of the future page table */
for (pfn = 0; pfn < allocated; pfn++)
munmap((void*) pages[pfn], PAGE_SIZE);
/* Pin the boot page table base */
if ( (rc = pin_table(dom->xch,
#ifdef __i386__
MMUEXT_PIN_L3_TABLE,
#endif
#ifdef __x86_64__
MMUEXT_PIN_L4_TABLE,
#endif
xc_dom_p2m_host(dom, dom->pgtables_seg.pfn),
dom->guest_domid)) != 0 ) {
grub_printf("pin_table(%lx) returned %d\n", xc_dom_p2m_host(dom,
dom->pgtables_seg.pfn), rc);
errnum = ERR_BOOT_FAILURE;
goto out_remap;
}
/* We populate the Mini-OS page table here so that boot.S can just call
* update_va_mapping to project itself there. */
need_pgt(_boot_target);
DEBUG("day0 pages %lx\n", allocated);
DEBUG("boot target page %lx\n", _boot_target);
DEBUG("boot page %p\n", &_boot_page);
DEBUG("boot page mfn %lx\n", boot_page_mfn);
_boot_page_entry = PFN_PHYS(boot_page_mfn) | L1_PROT;
DEBUG("boot page entry %llx\n", _boot_page_entry);
_boot_oldpdmfn = virt_to_mfn(start_info.pt_base);
DEBUG("boot old pd mfn %lx\n", _boot_oldpdmfn);
DEBUG("boot pd virt %lx\n", dom->pgtables_seg.vstart);
_boot_pdmfn = dom->p2m_host[PHYS_PFN(dom->pgtables_seg.vstart - dom->parms.virt_base)];
DEBUG("boot pd mfn %lx\n", _boot_pdmfn);
_boot_stack = _boot_target + PAGE_SIZE;
DEBUG("boot stack %lx\n", _boot_stack);
_boot_start_info = dom->parms.virt_base + PFN_PHYS(dom->start_info_pfn);
DEBUG("boot start info %lx\n", _boot_start_info);
_boot_start = dom->parms.virt_entry;
DEBUG("boot start %lx\n", _boot_start);
/* Keep only useful entries */
for (nr_m2p_updates = pfn = 0; pfn < start_info.nr_pages; pfn++)
if (dom->p2m_host[pfn] != pfn_to_mfn(pfn))
nr_m2p_updates++;
m2p_updates = malloc(sizeof(*m2p_updates) * nr_m2p_updates);
for (i = pfn = 0; pfn < start_info.nr_pages; pfn++)
if (dom->p2m_host[pfn] != pfn_to_mfn(pfn)) {
m2p_updates[i].ptr = PFN_PHYS(dom->p2m_host[pfn]) | MMU_MACHPHYS_UPDATE;
m2p_updates[i].val = pfn;
i++;
}
for (i = 0; i < blk_nb; i++)
shutdown_blkfront(blk_dev[i]);
if (net_dev)
shutdown_netfront(net_dev);
if (kbd_dev)
shutdown_kbdfront(kbd_dev);
stop_kernel();
/* Update M2P */
if ((rc = HYPERVISOR_mmu_update(m2p_updates, nr_m2p_updates, NULL, DOMID_SELF)) < 0) {
xprintk("Could not update M2P\n");
ASSERT(0);
}
xprintk("go!\n");
/* Jump to trampoline boot page */
_boot();
ASSERT(0);
out_remap:
for (pfn = 0; pfn < allocated; pfn++)
do_map_frames(pages[pfn], &pages_mfns[pfn], 1, 0, 0, DOMID_SELF, 0, L1_PROT);
out:
xc_dom_release(dom);
for (pfn = 0; pfn < allocated; pfn++)
free_page((void*)pages[pfn]);
free(pages);
free(pages_mfns);
pages = NULL;
pages_mfns = NULL;
allocated = 0;
xc_interface_close(xc_handle );
}
int xc_dom_boot_image(struct xc_dom_image *dom)
{
DECLARE_HYPERCALL_BUFFER(vcpu_guest_context_any_t, ctxt);
xc_dominfo_t info;
int rc;
ctxt = xc_hypercall_buffer_alloc(dom->xch, ctxt, sizeof(*ctxt));
if ( ctxt == NULL )
return -1;
DOMPRINTF_CALLED(dom->xch);
/* misc stuff*/
if ( (rc = arch_setup_bootearly(dom)) != 0 )
return rc;
/* collect some info */
rc = xc_domain_getinfo(dom->xch, dom->guest_domid, 1, &info);
if ( rc < 0 )
{
xc_dom_panic(dom->xch, XC_INTERNAL_ERROR,
"%s: getdomaininfo failed (rc=%d)", __FUNCTION__, rc);
return rc;
}
if ( rc == 0 || info.domid != dom->guest_domid )
{
xc_dom_panic(dom->xch, XC_INTERNAL_ERROR,
"%s: Huh? No domains found (nr_domains=%d) "
"or domid mismatch (%d != %d)", __FUNCTION__,
rc, info.domid, dom->guest_domid);
return -1;
}
dom->shared_info_mfn = info.shared_info_frame;
/* sanity checks */
if ( !xc_dom_compat_check(dom) )
return -1;
/* initial mm setup */
if ( (rc = xc_dom_update_guest_p2m(dom)) != 0 )
return rc;
if ( dom->arch_hooks->setup_pgtables )
if ( (rc = dom->arch_hooks->setup_pgtables(dom)) != 0 )
return rc;
if ( (rc = clear_page(dom, dom->console_pfn)) != 0 )
return rc;
if ( (rc = clear_page(dom, dom->xenstore_pfn)) != 0 )
return rc;
/* start info page */
if ( dom->arch_hooks->start_info )
dom->arch_hooks->start_info(dom);
/* hypercall page */
if ( (rc = setup_hypercall_page(dom)) != 0 )
return rc;
xc_dom_log_memory_footprint(dom);
/* misc x86 stuff */
if ( (rc = arch_setup_bootlate(dom)) != 0 )
return rc;
/* let the vm run */
memset(ctxt, 0, sizeof(*ctxt));
if ( (rc = dom->arch_hooks->vcpu(dom, ctxt)) != 0 )
return rc;
xc_dom_unmap_all(dom);
rc = launch_vm(dom->xch, dom->guest_domid, ctxt);
xc_hypercall_buffer_free(dom->xch, ctxt);
return rc;
}
