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authorJoao Martins <joao.m.martins@oracle.com>2023-03-07 12:54:40 +0000
committerAlex Williamson <alex.williamson@redhat.com>2023-03-07 07:20:32 -0700
commitfbc6c92134048cef7a9317119da4b6beea03138e (patch)
treea409ee74552ddc28eebfae03630651ad7fb15783 /hw/vfio
parent725ccd7e419d640ebee4c3869235efea070764de (diff)
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vfio/common: Add helper to validate iova/end against hostwin
Move the code that finds the container host DMA window against a iova range. This avoids duplication on the common checks across listener callbacks. Signed-off-by: Joao Martins <joao.m.martins@oracle.com> Reviewed-by: Cédric Le Goater <clg@redhat.com> Reviewed-by: Avihai Horon <avihaih@nvidia.com> Link: https://lore.kernel.org/r/20230307125450.62409-6-joao.m.martins@oracle.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'hw/vfio')
-rw-r--r--hw/vfio/common.c38
1 files changed, 20 insertions, 18 deletions
diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index cec3de0..99acb99 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -901,6 +901,22 @@ static void vfio_unregister_ram_discard_listener(VFIOContainer *container,
g_free(vrdl);
}
+static VFIOHostDMAWindow *vfio_find_hostwin(VFIOContainer *container,
+ hwaddr iova, hwaddr end)
+{
+ VFIOHostDMAWindow *hostwin;
+ bool hostwin_found = false;
+
+ QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) {
+ if (hostwin->min_iova <= iova && end <= hostwin->max_iova) {
+ hostwin_found = true;
+ break;
+ }
+ }
+
+ return hostwin_found ? hostwin : NULL;
+}
+
static bool vfio_known_safe_misalignment(MemoryRegionSection *section)
{
MemoryRegion *mr = section->mr;
@@ -926,7 +942,6 @@ static void vfio_listener_region_add(MemoryListener *listener,
void *vaddr;
int ret;
VFIOHostDMAWindow *hostwin;
- bool hostwin_found;
Error *err = NULL;
if (vfio_listener_skipped_section(section)) {
@@ -1027,15 +1042,8 @@ static void vfio_listener_region_add(MemoryListener *listener,
#endif
}
- 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) {
+ hostwin = vfio_find_hostwin(container, iova, end);
+ if (!hostwin) {
error_setg(&err, "Container %p can't map guest IOVA region"
" 0x%"HWADDR_PRIx"..0x%"HWADDR_PRIx, container, iova, end);
goto fail;
@@ -1237,15 +1245,9 @@ static void vfio_listener_region_del(MemoryListener *listener,
if (memory_region_is_ram_device(section->mr)) {
hwaddr pgmask;
VFIOHostDMAWindow *hostwin;
- bool hostwin_found = false;
- QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) {
- if (hostwin->min_iova <= iova && end <= hostwin->max_iova) {
- hostwin_found = true;
- break;
- }
- }
- assert(hostwin_found); /* or region_add() would have failed */
+ hostwin = vfio_find_hostwin(container, iova, end);
+ assert(hostwin); /* or region_add() would have failed */
pgmask = (1ULL << ctz64(hostwin->iova_pgsizes)) - 1;
try_unmap = !((iova & pgmask) || (int128_get64(llsize) & pgmask));