int vtd_cell_init(struct cell *cell)
{
struct jailhouse_cell_desc *config = cell->config;
const struct jailhouse_memory *mem =
jailhouse_cell_mem_regions(config);
const struct jailhouse_pci_device *dev =
jailhouse_cell_pci_devices(cell->config);
void *reg_base = dmar_reg_base;
int n, err;
// HACK for QEMU
if (dmar_units == 0)
return 0;
if (cell->id >= dmar_num_did)
return -ERANGE;
cell->vtd.pg_structs.root_paging = vtd_paging;
cell->vtd.pg_structs.root_table = page_alloc(&mem_pool, 1);
if (!cell->vtd.pg_structs.root_table)
return -ENOMEM;
for (n = 0; n < config->num_memory_regions; n++, mem++) {
err = vtd_map_memory_region(cell, mem);
if (err)
/* FIXME: release vtd.pg_structs.root_table */
return err;
}
for (n = 0; n < config->num_pci_devices; n++)
if (!vtd_add_device_to_cell(cell, &dev[n]))
/* FIXME: release vtd.pg_structs.root_table,
* revert device additions*/
return -ENOMEM;
if (!(mmio_read32(reg_base + VTD_GSTS_REG) & VTD_GSTS_TES))
for (n = 0; n < dmar_units; n++, reg_base += PAGE_SIZE) {
mmio_write64(reg_base + VTD_RTADDR_REG,
page_map_hvirt2phys(root_entry_table));
mmio_write32(reg_base + VTD_GCMD_REG, VTD_GCMD_SRTP);
while (!(mmio_read32(reg_base + VTD_GSTS_REG) &
VTD_GSTS_SRTP))
cpu_relax();
vtd_flush_dmar_caches(reg_base, VTD_CCMD_CIRG_GLOBAL,
VTD_IOTLB_IIRG_GLOBAL);
mmio_write32(reg_base + VTD_GCMD_REG, VTD_GCMD_TE);
while (!(mmio_read32(reg_base + VTD_GSTS_REG) &
VTD_GSTS_TES))
cpu_relax();
}
return 0;
}
static bool vtd_return_device_to_linux(const struct jailhouse_pci_device *dev)
{
const struct jailhouse_pci_device *linux_dev =
jailhouse_cell_pci_devices(linux_cell.config);
unsigned int n;
for (n = 0; n < linux_cell.config->num_pci_devices; n++)
if (linux_dev[n].domain == dev->domain &&
linux_dev[n].bus == dev->bus &&
linux_dev[n].devfn == dev->devfn)
return vtd_add_device_to_cell(&linux_cell,
&linux_dev[n]);
return true;
}