/*
* restore_ops function. Sets extra hvm parameters and seeds the grant table.
*/
static int x86_hvm_stream_complete(struct xc_sr_context *ctx)
{
xc_interface *xch = ctx->xch;
int rc;
rc = xc_hvm_param_set(xch, ctx->domid, HVM_PARAM_STORE_EVTCHN,
ctx->restore.xenstore_evtchn);
if ( rc )
{
PERROR("Failed to set HVM_PARAM_STORE_EVTCHN");
return rc;
}
rc = xc_hvm_param_set(xch, ctx->domid, HVM_PARAM_CONSOLE_EVTCHN,
ctx->restore.console_evtchn);
if ( rc )
{
PERROR("Failed to set HVM_PARAM_CONSOLE_EVTCHN");
return rc;
}
rc = xc_domain_hvm_setcontext(xch, ctx->domid,
ctx->x86_hvm.restore.context,
ctx->x86_hvm.restore.contextsz);
if ( rc < 0 )
{
PERROR("Unable to restore HVM context");
return rc;
}
rc = xc_dom_gnttab_hvm_seed(xch, ctx->domid,
ctx->restore.console_gfn,
ctx->restore.xenstore_gfn,
ctx->restore.console_domid,
ctx->restore.xenstore_domid);
if ( rc )
{
PERROR("Failed to seed grant table");
return rc;
}
#ifdef XG_LIBXL_HVM_COMPAT
rc = handle_qemu(ctx);
if ( rc )
{
ERROR("Failed to dump qemu");
return rc;
}
#endif
return rc;
}
/*
* Process an HVM_PARAMS record from the stream.
*/
static int handle_hvm_params(struct xc_sr_context *ctx,
struct xc_sr_record *rec)
{
xc_interface *xch = ctx->xch;
struct xc_sr_rec_hvm_params *hdr = rec->data;
struct xc_sr_rec_hvm_params_entry *entry = hdr->param;
unsigned int i;
int rc;
if ( rec->length < sizeof(*hdr)
|| rec->length < sizeof(*hdr) + hdr->count * sizeof(*entry) )
{
ERROR("hvm_params record is too short");
return -1;
}
for ( i = 0; i < hdr->count; i++, entry++ )
{
switch ( entry->index )
{
case HVM_PARAM_CONSOLE_PFN:
ctx->restore.console_gfn = entry->value;
xc_clear_domain_page(xch, ctx->domid, entry->value);
break;
case HVM_PARAM_STORE_PFN:
ctx->restore.xenstore_gfn = entry->value;
xc_clear_domain_page(xch, ctx->domid, entry->value);
break;
case HVM_PARAM_IOREQ_PFN:
case HVM_PARAM_BUFIOREQ_PFN:
xc_clear_domain_page(xch, ctx->domid, entry->value);
break;
}
rc = xc_hvm_param_set(xch, ctx->domid, entry->index, entry->value);
if ( rc < 0 )
{
PERROR("set HVM param %"PRId64" = 0x%016"PRIx64,
entry->index, entry->value);
return rc;
}
}
return 0;
}
/*
* Process an HVM_PARAMS record from the stream.
*/
static int handle_hvm_params(struct xc_sr_context *ctx,
struct xc_sr_record *rec)
{
xc_interface *xch = ctx->xch;
struct xc_sr_rec_hvm_params *hdr = rec->data;
struct xc_sr_rec_hvm_params_entry *entry = hdr->param;
unsigned int i;
int rc;
if ( rec->length < sizeof(*hdr) )
{
ERROR("HVM_PARAMS record truncated: length %u, header size %zu",
rec->length, sizeof(*hdr));
return -1;
}
if ( rec->length != (sizeof(*hdr) + hdr->count * sizeof(*entry)) )
{
ERROR("HVM_PARAMS record truncated: header %zu, count %u, "
"expected len %zu, got %u",
sizeof(*hdr), hdr->count, hdr->count * sizeof(*entry),
rec->length);
return -1;
}
/*
* Tolerate empty records. Older sending sides used to accidentally
* generate them.
*/
if ( hdr->count == 0 )
{
DBGPRINTF("Skipping empty HVM_PARAMS record\n");
return 0;
}
for ( i = 0; i < hdr->count; i++, entry++ )
{
switch ( entry->index )
{
case HVM_PARAM_CONSOLE_PFN:
ctx->restore.console_gfn = entry->value;
xc_clear_domain_page(xch, ctx->domid, entry->value);
break;
case HVM_PARAM_STORE_PFN:
ctx->restore.xenstore_gfn = entry->value;
xc_clear_domain_page(xch, ctx->domid, entry->value);
break;
case HVM_PARAM_IOREQ_PFN:
case HVM_PARAM_BUFIOREQ_PFN:
xc_clear_domain_page(xch, ctx->domid, entry->value);
break;
}
rc = xc_hvm_param_set(xch, ctx->domid, entry->index, entry->value);
if ( rc < 0 )
{
PERROR("set HVM param %"PRId64" = 0x%016"PRIx64,
entry->index, entry->value);
return rc;
}
}
return 0;
}
