static int xc_resource_op_multi(xc_interface *xch, uint32_t nr_ops, xc_resource_op_t *ops)
{
int rc, i, entries_size;
xc_resource_op_t *op;
multicall_entry_t *call;
DECLARE_HYPERCALL_BUFFER(multicall_entry_t, call_list);
xc_hypercall_buffer_array_t *platform_ops, *entries_list = NULL;
call_list = xc_hypercall_buffer_alloc(xch, call_list,
sizeof(*call_list) * nr_ops);
if ( !call_list )
return -1;
platform_ops = xc_hypercall_buffer_array_create(xch, nr_ops);
if ( !platform_ops )
{
rc = -1;
goto out;
}
entries_list = xc_hypercall_buffer_array_create(xch, nr_ops);
if ( !entries_list )
{
rc = -1;
goto out;
}
for ( i = 0; i < nr_ops; i++ )
{
DECLARE_HYPERCALL_BUFFER(xen_platform_op_t, platform_op);
DECLARE_HYPERCALL_BUFFER(xc_resource_entry_t, entries);
op = ops + i;
platform_op = xc_hypercall_buffer_array_alloc(xch, platform_ops, i,
platform_op, sizeof(xen_platform_op_t));
if ( !platform_op )
{
rc = -1;
goto out;
}
entries_size = sizeof(xc_resource_entry_t) * op->nr_entries;
entries = xc_hypercall_buffer_array_alloc(xch, entries_list, i,
entries, entries_size);
if ( !entries)
{
rc = -1;
goto out;
}
memcpy(entries, op->entries, entries_size);
call = call_list + i;
call->op = __HYPERVISOR_platform_op;
call->args[0] = HYPERCALL_BUFFER_AS_ARG(platform_op);
platform_op->interface_version = XENPF_INTERFACE_VERSION;
platform_op->cmd = XENPF_resource_op;
platform_op->u.resource_op.cpu = op->cpu;
platform_op->u.resource_op.nr_entries = op->nr_entries;
set_xen_guest_handle(platform_op->u.resource_op.entries, entries);
}
rc = do_multicall_op(xch, HYPERCALL_BUFFER(call_list), nr_ops);
for ( i = 0; i < nr_ops; i++ )
{
DECLARE_HYPERCALL_BUFFER(xc_resource_entry_t, entries);
op = ops + i;
call = call_list + i;
op->result = call->result;
entries_size = sizeof(xc_resource_entry_t) * op->nr_entries;
entries = xc_hypercall_buffer_array_get(xch, entries_list, i,
entries, entries_size);
memcpy(op->entries, entries, entries_size);
}
out:
xc_hypercall_buffer_array_destroy(xch, entries_list);
xc_hypercall_buffer_array_destroy(xch, platform_ops);
xc_hypercall_buffer_free(xch, call_list);
return rc;
}
int xen_kexec_load(struct kexec_info *info)
{
uint32_t nr_segments = info->nr_segments;
struct kexec_segment *segments = info->segment;
xc_interface *xch;
xc_hypercall_buffer_array_t *array = NULL;
uint8_t type;
uint8_t arch;
xen_kexec_segment_t *xen_segs;
int s;
int ret = -1;
xch = xc_interface_open(NULL, NULL, 0);
if (!xch)
return -1;
xen_segs = calloc(nr_segments + 1, sizeof(*xen_segs));
if (!xen_segs)
goto out;
array = xc_hypercall_buffer_array_create(xch, nr_segments);
if (array == NULL)
goto out;
for (s = 0; s < nr_segments; s++) {
DECLARE_HYPERCALL_BUFFER(void, seg_buf);
seg_buf = xc_hypercall_buffer_array_alloc(xch, array, s,
seg_buf, segments[s].bufsz);
if (seg_buf == NULL)
goto out;
memcpy(seg_buf, segments[s].buf, segments[s].bufsz);
set_xen_guest_handle(xen_segs[s].buf.h, seg_buf);
xen_segs[s].buf_size = segments[s].bufsz;
xen_segs[s].dest_maddr = (uint64_t)segments[s].mem;
xen_segs[s].dest_size = segments[s].memsz;
}
/*
* Ensure 0 - 1 MiB is mapped and accessible by the image.
*
* This allows access to the VGA memory and the region
* purgatory copies in the crash case.
*/
set_xen_guest_handle(xen_segs[s].buf.h, HYPERCALL_BUFFER_NULL);
xen_segs[s].buf_size = 0;
xen_segs[s].dest_maddr = 0;
xen_segs[s].dest_size = 1 * 1024 * 1024;
nr_segments++;
type = (info->kexec_flags & KEXEC_ON_CRASH) ? KEXEC_TYPE_CRASH
: KEXEC_TYPE_DEFAULT;
arch = (info->kexec_flags & KEXEC_ARCH_MASK) >> 16;
#if defined(__i386__) || defined(__x86_64__)
if (!arch)
arch = EM_386;
#endif
ret = xc_kexec_load(xch, type, arch, (uint64_t)info->entry,
nr_segments, xen_segs);
out:
xc_hypercall_buffer_array_destroy(xch, array);
free(xen_segs);
xc_interface_close(xch);
return ret;
}