#include "exec/memory.h"
#include "hw/hw.h"
#include "qemu/error-report.h"
+#include "qemu/range.h"
#include "sysemu/kvm.h"
#ifdef CONFIG_KVM
#include "linux/kvm.h"
return -errno;
}
+static void vfio_host_win_add(VFIOContainer *container,
+ hwaddr min_iova, hwaddr max_iova,
+ uint64_t iova_pgsizes)
+{
+ VFIOHostDMAWindow *hostwin;
+
+ QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) {
+ if (ranges_overlap(hostwin->min_iova,
+ hostwin->max_iova - hostwin->min_iova + 1,
+ min_iova,
+ max_iova - min_iova + 1)) {
+ hw_error("%s: Overlapped IOMMU are not enabled", __func__);
+ }
+ }
+
+ hostwin = g_malloc0(sizeof(*hostwin));
+
+ hostwin->min_iova = min_iova;
+ hostwin->max_iova = max_iova;
+ hostwin->iova_pgsizes = iova_pgsizes;
+ QLIST_INSERT_HEAD(&container->hostwin_list, hostwin, hostwin_next);
+}
+
static bool vfio_listener_skipped_section(MemoryRegionSection *section)
{
return (!memory_region_is_ram(section->mr) &&
Int128 llend, llsize;
void *vaddr;
int ret;
+ VFIOHostDMAWindow *hostwin;
+ bool hostwin_found;
if (vfio_listener_skipped_section(section)) {
trace_vfio_listener_region_add_skip(
}
end = int128_get64(int128_sub(llend, int128_one()));
- if ((iova < container->min_iova) || (end > container->max_iova)) {
+ hostwin_found = false;
+ QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) {
+ if (hostwin->min_iova <= iova && end <= hostwin->max_iova) {
+ hostwin_found = true;
+ break;
+ }
+ }
+
+ if (!hostwin_found) {
error_report("vfio: IOMMU container %p can't map guest IOVA region"
" 0x%"HWADDR_PRIx"..0x%"HWADDR_PRIx,
container, iova, end);
trace_vfio_listener_region_add_iommu(iova, end);
/*
- * FIXME: We should do some checking to see if the
- * capabilities of the host VFIO IOMMU are adequate to model
- * the guest IOMMU
- *
* FIXME: For VFIO iommu types which have KVM acceleration to
* avoid bouncing all map/unmaps through qemu this way, this
* would be the right place to wire that up (tell the KVM
* existing Type1 IOMMUs generally support any IOVA we're
* going to actually try in practice.
*/
- container->min_iova = 0;
- container->max_iova = (hwaddr)-1;
-
- /* Assume just 4K IOVA page size */
- container->iova_pgsizes = 0x1000;
info.argsz = sizeof(info);
ret = ioctl(fd, VFIO_IOMMU_GET_INFO, &info);
/* Ignore errors */
- if ((ret == 0) && (info.flags & VFIO_IOMMU_INFO_PGSIZES)) {
- container->iova_pgsizes = info.iova_pgsizes;
+ if (ret || !(info.flags & VFIO_IOMMU_INFO_PGSIZES)) {
+ /* Assume 4k IOVA page size */
+ info.iova_pgsizes = 4096;
}
+ vfio_host_win_add(container, 0, (hwaddr)-1, info.iova_pgsizes);
} else if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_IOMMU) ||
ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_v2_IOMMU)) {
struct vfio_iommu_spapr_tce_info info;
}
goto free_container_exit;
}
- container->min_iova = info.dma32_window_start;
- container->max_iova = container->min_iova + info.dma32_window_size - 1;
- /* Assume just 4K IOVA pages for now */
- container->iova_pgsizes = 0x1000;
+ /* The default table uses 4K pages */
+ vfio_host_win_add(container, info.dma32_window_start,
+ info.dma32_window_start +
+ info.dma32_window_size - 1,
+ 0x1000);
} else {
error_report("vfio: No available IOMMU models");
ret = -EINVAL;