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Diffstat (limited to 'hw/vfio/common.c')
-rw-r--r--hw/vfio/common.c175
1 files changed, 143 insertions, 32 deletions
diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index 27cc1596f9..f3c0522e7e 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -28,6 +28,7 @@
#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"
@@ -241,6 +242,44 @@ static int vfio_dma_map(VFIOContainer *container, hwaddr iova,
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 int vfio_host_win_del(VFIOContainer *container, hwaddr min_iova,
+ hwaddr max_iova)
+{
+ VFIOHostDMAWindow *hostwin;
+
+ QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) {
+ if (hostwin->min_iova == min_iova && hostwin->max_iova == max_iova) {
+ QLIST_REMOVE(hostwin, hostwin_next);
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
static bool vfio_listener_skipped_section(MemoryRegionSection *section)
{
return (!memory_region_is_ram(section->mr) &&
@@ -329,6 +368,8 @@ static void vfio_listener_region_add(MemoryListener *listener,
Int128 llend, llsize;
void *vaddr;
int ret;
+ VFIOHostDMAWindow *hostwin;
+ bool hostwin_found;
if (vfio_listener_skipped_section(section)) {
trace_vfio_listener_region_add_skip(
@@ -354,7 +395,40 @@ static void vfio_listener_region_add(MemoryListener *listener,
}
end = int128_get64(int128_sub(llend, int128_one()));
- if ((iova < container->min_iova) || (end > container->max_iova)) {
+ if (container->iommu_type == VFIO_SPAPR_TCE_v2_IOMMU) {
+ VFIOHostDMAWindow *hostwin;
+ hwaddr pgsize = 0;
+
+ /* For now intersections are not allowed, we may relax this later */
+ QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) {
+ if (ranges_overlap(hostwin->min_iova,
+ hostwin->max_iova - hostwin->min_iova + 1,
+ section->offset_within_address_space,
+ int128_get64(section->size))) {
+ ret = -1;
+ goto fail;
+ }
+ }
+
+ ret = vfio_spapr_create_window(container, section, &pgsize);
+ if (ret) {
+ goto fail;
+ }
+
+ vfio_host_win_add(container, section->offset_within_address_space,
+ section->offset_within_address_space +
+ int128_get64(section->size) - 1, pgsize);
+ }
+
+ 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);
@@ -369,10 +443,6 @@ static void vfio_listener_region_add(MemoryListener *listener,
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
@@ -455,7 +525,8 @@ static void vfio_listener_region_del(MemoryListener *listener,
QLIST_FOREACH(giommu, &container->giommu_list, giommu_next) {
if (giommu->iommu == section->mr) {
- memory_region_unregister_iommu_notifier(&giommu->n);
+ memory_region_unregister_iommu_notifier(giommu->iommu,
+ &giommu->n);
QLIST_REMOVE(giommu, giommu_next);
g_free(giommu);
break;
@@ -492,6 +563,18 @@ static void vfio_listener_region_del(MemoryListener *listener,
"0x%"HWADDR_PRIx") = %d (%m)",
container, iova, int128_get64(llsize), ret);
}
+
+ if (container->iommu_type == VFIO_SPAPR_TCE_v2_IOMMU) {
+ vfio_spapr_remove_window(container,
+ section->offset_within_address_space);
+ if (vfio_host_win_del(container,
+ section->offset_within_address_space,
+ section->offset_within_address_space +
+ int128_get64(section->size) - 1) < 0) {
+ hw_error("%s: Cannot delete missing window at %"HWADDR_PRIx,
+ __func__, section->offset_within_address_space);
+ }
+ }
}
static const MemoryListener vfio_memory_listener = {
@@ -502,6 +585,9 @@ static const MemoryListener vfio_memory_listener = {
static void vfio_listener_release(VFIOContainer *container)
{
memory_listener_unregister(&container->listener);
+ if (container->iommu_type == VFIO_SPAPR_TCE_v2_IOMMU) {
+ memory_listener_unregister(&container->prereg_listener);
+ }
}
static struct vfio_info_cap_header *
@@ -860,8 +946,8 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as)
goto free_container_exit;
}
- ret = ioctl(fd, VFIO_SET_IOMMU,
- v2 ? VFIO_TYPE1v2_IOMMU : VFIO_TYPE1_IOMMU);
+ container->iommu_type = v2 ? VFIO_TYPE1v2_IOMMU : VFIO_TYPE1_IOMMU;
+ ret = ioctl(fd, VFIO_SET_IOMMU, container->iommu_type);
if (ret) {
error_report("vfio: failed to set iommu for container: %m");
ret = -errno;
@@ -875,19 +961,18 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as)
* 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;
}
- } else if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_IOMMU)) {
+ 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;
+ bool v2 = !!ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_v2_IOMMU);
ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd);
if (ret) {
@@ -895,7 +980,9 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as)
ret = -errno;
goto free_container_exit;
}
- ret = ioctl(fd, VFIO_SET_IOMMU, VFIO_SPAPR_TCE_IOMMU);
+ container->iommu_type =
+ v2 ? VFIO_SPAPR_TCE_v2_IOMMU : VFIO_SPAPR_TCE_IOMMU;
+ ret = ioctl(fd, VFIO_SET_IOMMU, container->iommu_type);
if (ret) {
error_report("vfio: failed to set iommu for container: %m");
ret = -errno;
@@ -907,30 +994,54 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as)
* when container fd is closed so we do not call it explicitly
* in this file.
*/
- ret = ioctl(fd, VFIO_IOMMU_ENABLE);
- if (ret) {
- error_report("vfio: failed to enable container: %m");
- ret = -errno;
- goto free_container_exit;
+ if (!v2) {
+ ret = ioctl(fd, VFIO_IOMMU_ENABLE);
+ if (ret) {
+ error_report("vfio: failed to enable container: %m");
+ ret = -errno;
+ goto free_container_exit;
+ }
+ } else {
+ container->prereg_listener = vfio_prereg_listener;
+
+ memory_listener_register(&container->prereg_listener,
+ &address_space_memory);
+ if (container->error) {
+ memory_listener_unregister(&container->prereg_listener);
+ error_report("vfio: RAM memory listener initialization failed for container");
+ goto free_container_exit;
+ }
}
- /*
- * This only considers the host IOMMU's 32-bit window. At
- * some point we need to add support for the optional 64-bit
- * window and dynamic windows
- */
info.argsz = sizeof(info);
ret = ioctl(fd, VFIO_IOMMU_SPAPR_TCE_GET_INFO, &info);
if (ret) {
error_report("vfio: VFIO_IOMMU_SPAPR_TCE_GET_INFO failed: %m");
ret = -errno;
+ if (v2) {
+ memory_listener_unregister(&container->prereg_listener);
+ }
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;
+ if (v2) {
+ /*
+ * There is a default window in just created container.
+ * To make region_add/del simpler, we better remove this
+ * window now and let those iommu_listener callbacks
+ * create/remove them when needed.
+ */
+ ret = vfio_spapr_remove_window(container, info.dma32_window_start);
+ if (ret) {
+ goto free_container_exit;
+ }
+ } else {
+ /* 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;
@@ -991,7 +1102,7 @@ static void vfio_disconnect_container(VFIOGroup *group)
QLIST_REMOVE(container, next);
QLIST_FOREACH_SAFE(giommu, &container->giommu_list, giommu_next, tmp) {
- memory_region_unregister_iommu_notifier(&giommu->n);
+ memory_region_unregister_iommu_notifier(giommu->iommu, &giommu->n);
QLIST_REMOVE(giommu, giommu_next);
g_free(giommu);
}