mirror of https://gitee.com/openkylin/qemu.git
103 lines
3.4 KiB
C
103 lines
3.4 KiB
C
/*
|
|
* QEMU sPAPR PCI host for VFIO
|
|
*
|
|
* Copyright (c) 2011-2014 Alexey Kardashevskiy, IBM Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License,
|
|
* or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "hw/ppc/spapr.h"
|
|
#include "hw/pci-host/spapr.h"
|
|
#include "linux/vfio.h"
|
|
#include "hw/misc/vfio.h"
|
|
|
|
static Property spapr_phb_vfio_properties[] = {
|
|
DEFINE_PROP_INT32("iommu", sPAPRPHBVFIOState, iommugroupid, -1),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void spapr_phb_vfio_finish_realize(sPAPRPHBState *sphb, Error **errp)
|
|
{
|
|
sPAPRPHBVFIOState *svphb = SPAPR_PCI_VFIO_HOST_BRIDGE(sphb);
|
|
struct vfio_iommu_spapr_tce_info info = { .argsz = sizeof(info) };
|
|
int ret;
|
|
sPAPRTCETable *tcet;
|
|
uint32_t liobn = svphb->phb.dma_liobn;
|
|
|
|
if (svphb->iommugroupid == -1) {
|
|
error_setg(errp, "Wrong IOMMU group ID %d", svphb->iommugroupid);
|
|
return;
|
|
}
|
|
|
|
ret = vfio_container_ioctl(&svphb->phb.iommu_as, svphb->iommugroupid,
|
|
VFIO_CHECK_EXTENSION,
|
|
(void *) VFIO_SPAPR_TCE_IOMMU);
|
|
if (ret != 1) {
|
|
error_setg_errno(errp, -ret,
|
|
"spapr-vfio: SPAPR extension is not supported");
|
|
return;
|
|
}
|
|
|
|
ret = vfio_container_ioctl(&svphb->phb.iommu_as, svphb->iommugroupid,
|
|
VFIO_IOMMU_SPAPR_TCE_GET_INFO, &info);
|
|
if (ret) {
|
|
error_setg_errno(errp, -ret,
|
|
"spapr-vfio: get info from container failed");
|
|
return;
|
|
}
|
|
|
|
tcet = spapr_tce_new_table(DEVICE(sphb), liobn, info.dma32_window_start,
|
|
SPAPR_TCE_PAGE_SHIFT,
|
|
info.dma32_window_size >> SPAPR_TCE_PAGE_SHIFT,
|
|
true);
|
|
if (!tcet) {
|
|
error_setg(errp, "spapr-vfio: failed to create VFIO TCE table");
|
|
return;
|
|
}
|
|
|
|
/* Register default 32bit DMA window */
|
|
memory_region_add_subregion(&sphb->iommu_root, tcet->bus_offset,
|
|
spapr_tce_get_iommu(tcet));
|
|
}
|
|
|
|
static void spapr_phb_vfio_reset(DeviceState *qdev)
|
|
{
|
|
/* Do nothing */
|
|
}
|
|
|
|
static void spapr_phb_vfio_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
sPAPRPHBClass *spc = SPAPR_PCI_HOST_BRIDGE_CLASS(klass);
|
|
|
|
dc->props = spapr_phb_vfio_properties;
|
|
dc->reset = spapr_phb_vfio_reset;
|
|
spc->finish_realize = spapr_phb_vfio_finish_realize;
|
|
}
|
|
|
|
static const TypeInfo spapr_phb_vfio_info = {
|
|
.name = TYPE_SPAPR_PCI_VFIO_HOST_BRIDGE,
|
|
.parent = TYPE_SPAPR_PCI_HOST_BRIDGE,
|
|
.instance_size = sizeof(sPAPRPHBVFIOState),
|
|
.class_init = spapr_phb_vfio_class_init,
|
|
.class_size = sizeof(sPAPRPHBClass),
|
|
};
|
|
|
|
static void spapr_pci_vfio_register_types(void)
|
|
{
|
|
type_register_static(&spapr_phb_vfio_info);
|
|
}
|
|
|
|
type_init(spapr_pci_vfio_register_types)
|