Pass IOMMU_HWPT_GET_DIRTY_BITMAP_NO_CLEAR when doing the last dirty
bitmap query right before unmap, no PTEs flushes. This accelerates the
query without issue because unmap will tear down the mapping anyway.
Co-developed-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Tested-by: Xudong Hao <xudong.hao@intel.com>
Tested-by: Giovannio Cabiddu <giovanni.cabiddu@intel.com>
---
include/system/iommufd.h | 2 +-
backends/iommufd.c | 5 +++--
hw/vfio/iommufd.c | 5 +++--
backends/trace-events | 2 +-
4 files changed, 8 insertions(+), 6 deletions(-)
diff --git a/include/system/iommufd.h b/include/system/iommufd.h
index a659f36a20..767a8e4cb6 100644
--- a/include/system/iommufd.h
+++ b/include/system/iommufd.h
@@ -64,7 +64,7 @@ bool iommufd_backend_set_dirty_tracking(IOMMUFDBackend *be, uint32_t hwpt_id,
bool iommufd_backend_get_dirty_bitmap(IOMMUFDBackend *be, uint32_t hwpt_id,
uint64_t iova, ram_addr_t size,
uint64_t page_size, uint64_t *data,
- Error **errp);
+ uint64_t flags, Error **errp);
bool iommufd_backend_invalidate_cache(IOMMUFDBackend *be, uint32_t id,
uint32_t data_type, uint32_t entry_len,
uint32_t *entry_num, void *data,
diff --git a/backends/iommufd.c b/backends/iommufd.c
index fdfb7c9d67..086bd67aea 100644
--- a/backends/iommufd.c
+++ b/backends/iommufd.c
@@ -361,7 +361,7 @@ bool iommufd_backend_get_dirty_bitmap(IOMMUFDBackend *be,
uint32_t hwpt_id,
uint64_t iova, ram_addr_t size,
uint64_t page_size, uint64_t *data,
- Error **errp)
+ uint64_t flags, Error **errp)
{
int ret;
struct iommu_hwpt_get_dirty_bitmap get_dirty_bitmap = {
@@ -371,11 +371,12 @@ bool iommufd_backend_get_dirty_bitmap(IOMMUFDBackend *be,
.length = size,
.page_size = page_size,
.data = (uintptr_t)data,
+ .flags = flags,
};
ret = ioctl(be->fd, IOMMU_HWPT_GET_DIRTY_BITMAP, &get_dirty_bitmap);
trace_iommufd_backend_get_dirty_bitmap(be->fd, hwpt_id, iova, size,
- page_size, ret ? errno : 0);
+ flags, page_size, ret ? errno : 0);
if (ret) {
error_setg_errno(errp, errno,
"IOMMU_HWPT_GET_DIRTY_BITMAP (iova: 0x%"HWADDR_PRIx
diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c
index 6457cef344..937b80340c 100644
--- a/hw/vfio/iommufd.c
+++ b/hw/vfio/iommufd.c
@@ -74,7 +74,8 @@ static int iommufd_cdev_unmap(const VFIOContainer *bcontainer,
if (iotlb && vfio_container_dirty_tracking_is_started(bcontainer)) {
if (!vfio_container_devices_dirty_tracking_is_supported(bcontainer) &&
bcontainer->dirty_pages_supported) {
- ret = vfio_container_query_dirty_bitmap(bcontainer, iova, size, 0,
+ ret = vfio_container_query_dirty_bitmap(bcontainer, iova, size,
+ IOMMU_HWPT_GET_DIRTY_BITMAP_NO_CLEAR,
iotlb->translated_addr,
&local_err);
if (ret) {
@@ -224,7 +225,7 @@ static int iommufd_query_dirty_bitmap(const VFIOContainer *bcontainer,
if (!iommufd_backend_get_dirty_bitmap(container->be, hwpt->hwpt_id,
iova, size, page_size,
(uint64_t *)vbmap->bitmap,
- errp)) {
+ backend_flag, errp)) {
return -EINVAL;
}
}
diff --git a/backends/trace-events b/backends/trace-events
index 56132d3fd2..e1992ba12f 100644
--- a/backends/trace-events
+++ b/backends/trace-events
@@ -19,5 +19,5 @@ iommufd_backend_alloc_ioas(int iommufd, uint32_t ioas) " iommufd=%d ioas=%d"
iommufd_backend_alloc_hwpt(int iommufd, uint32_t dev_id, uint32_t pt_id, uint32_t flags, uint32_t hwpt_type, uint32_t len, uint64_t data_ptr, uint32_t out_hwpt_id, int ret) " iommufd=%d dev_id=%u pt_id=%u flags=0x%x hwpt_type=%u len=%u data_ptr=0x%"PRIx64" out_hwpt=%u (%d)"
iommufd_backend_free_id(int iommufd, uint32_t id, int ret) " iommufd=%d id=%d (%d)"
iommufd_backend_set_dirty(int iommufd, uint32_t hwpt_id, bool start, int ret) " iommufd=%d hwpt=%u enable=%d (%d)"
-iommufd_backend_get_dirty_bitmap(int iommufd, uint32_t hwpt_id, uint64_t iova, uint64_t size, uint64_t page_size, int ret) " iommufd=%d hwpt=%u iova=0x%"PRIx64" size=0x%"PRIx64" page_size=0x%"PRIx64" (%d)"
+iommufd_backend_get_dirty_bitmap(int iommufd, uint32_t hwpt_id, uint64_t iova, uint64_t size, uint64_t flags, uint64_t page_size, int ret) " iommufd=%d hwpt=%u iova=0x%"PRIx64" size=0x%"PRIx64" flags=0x%"PRIx64" page_size=0x%"PRIx64" (%d)"
iommufd_backend_invalidate_cache(int iommufd, uint32_t id, uint32_t data_type, uint32_t entry_len, uint32_t entry_num, uint32_t done_num, uint64_t data_ptr, int ret) " iommufd=%d id=%u data_type=%u entry_len=%u entry_num=%u done_num=%u data_ptr=0x%"PRIx64" (%d)"
--
2.47.1On 2025/10/17 16:22, Zhenzhong Duan wrote:
> Pass IOMMU_HWPT_GET_DIRTY_BITMAP_NO_CLEAR when doing the last dirty
> bitmap query right before unmap, no PTEs flushes. This accelerates the
> query without issue because unmap will tear down the mapping anyway.
>
> Co-developed-by: Joao Martins <joao.m.martins@oracle.com>
> Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
> Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
> Tested-by: Xudong Hao <xudong.hao@intel.com>
> Tested-by: Giovannio Cabiddu <giovanni.cabiddu@intel.com>
> ---
> include/system/iommufd.h | 2 +-
> backends/iommufd.c | 5 +++--
> hw/vfio/iommufd.c | 5 +++--
> backends/trace-events | 2 +-
> 4 files changed, 8 insertions(+), 6 deletions(-)
Reviewed-by: Yi Liu <yi.l.liu@intel.com>
> diff --git a/include/system/iommufd.h b/include/system/iommufd.h
> index a659f36a20..767a8e4cb6 100644
> --- a/include/system/iommufd.h
> +++ b/include/system/iommufd.h
> @@ -64,7 +64,7 @@ bool iommufd_backend_set_dirty_tracking(IOMMUFDBackend *be, uint32_t hwpt_id,
> bool iommufd_backend_get_dirty_bitmap(IOMMUFDBackend *be, uint32_t hwpt_id,
> uint64_t iova, ram_addr_t size,
> uint64_t page_size, uint64_t *data,
> - Error **errp);
> + uint64_t flags, Error **errp);
> bool iommufd_backend_invalidate_cache(IOMMUFDBackend *be, uint32_t id,
> uint32_t data_type, uint32_t entry_len,
> uint32_t *entry_num, void *data,
> diff --git a/backends/iommufd.c b/backends/iommufd.c
> index fdfb7c9d67..086bd67aea 100644
> --- a/backends/iommufd.c
> +++ b/backends/iommufd.c
> @@ -361,7 +361,7 @@ bool iommufd_backend_get_dirty_bitmap(IOMMUFDBackend *be,
> uint32_t hwpt_id,
> uint64_t iova, ram_addr_t size,
> uint64_t page_size, uint64_t *data,
> - Error **errp)
> + uint64_t flags, Error **errp)
> {
> int ret;
> struct iommu_hwpt_get_dirty_bitmap get_dirty_bitmap = {
> @@ -371,11 +371,12 @@ bool iommufd_backend_get_dirty_bitmap(IOMMUFDBackend *be,
> .length = size,
> .page_size = page_size,
> .data = (uintptr_t)data,
> + .flags = flags,
> };
>
> ret = ioctl(be->fd, IOMMU_HWPT_GET_DIRTY_BITMAP, &get_dirty_bitmap);
> trace_iommufd_backend_get_dirty_bitmap(be->fd, hwpt_id, iova, size,
> - page_size, ret ? errno : 0);
> + flags, page_size, ret ? errno : 0);
> if (ret) {
> error_setg_errno(errp, errno,
> "IOMMU_HWPT_GET_DIRTY_BITMAP (iova: 0x%"HWADDR_PRIx
> diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c
> index 6457cef344..937b80340c 100644
> --- a/hw/vfio/iommufd.c
> +++ b/hw/vfio/iommufd.c
> @@ -74,7 +74,8 @@ static int iommufd_cdev_unmap(const VFIOContainer *bcontainer,
> if (iotlb && vfio_container_dirty_tracking_is_started(bcontainer)) {
> if (!vfio_container_devices_dirty_tracking_is_supported(bcontainer) &&
> bcontainer->dirty_pages_supported) {
> - ret = vfio_container_query_dirty_bitmap(bcontainer, iova, size, 0,
> + ret = vfio_container_query_dirty_bitmap(bcontainer, iova, size,
> + IOMMU_HWPT_GET_DIRTY_BITMAP_NO_CLEAR,
> iotlb->translated_addr,
> &local_err);
> if (ret) {
> @@ -224,7 +225,7 @@ static int iommufd_query_dirty_bitmap(const VFIOContainer *bcontainer,
> if (!iommufd_backend_get_dirty_bitmap(container->be, hwpt->hwpt_id,
> iova, size, page_size,
> (uint64_t *)vbmap->bitmap,
> - errp)) {
> + backend_flag, errp)) {
> return -EINVAL;
> }
> }
> diff --git a/backends/trace-events b/backends/trace-events
> index 56132d3fd2..e1992ba12f 100644
> --- a/backends/trace-events
> +++ b/backends/trace-events
> @@ -19,5 +19,5 @@ iommufd_backend_alloc_ioas(int iommufd, uint32_t ioas) " iommufd=%d ioas=%d"
> iommufd_backend_alloc_hwpt(int iommufd, uint32_t dev_id, uint32_t pt_id, uint32_t flags, uint32_t hwpt_type, uint32_t len, uint64_t data_ptr, uint32_t out_hwpt_id, int ret) " iommufd=%d dev_id=%u pt_id=%u flags=0x%x hwpt_type=%u len=%u data_ptr=0x%"PRIx64" out_hwpt=%u (%d)"
> iommufd_backend_free_id(int iommufd, uint32_t id, int ret) " iommufd=%d id=%d (%d)"
> iommufd_backend_set_dirty(int iommufd, uint32_t hwpt_id, bool start, int ret) " iommufd=%d hwpt=%u enable=%d (%d)"
> -iommufd_backend_get_dirty_bitmap(int iommufd, uint32_t hwpt_id, uint64_t iova, uint64_t size, uint64_t page_size, int ret) " iommufd=%d hwpt=%u iova=0x%"PRIx64" size=0x%"PRIx64" page_size=0x%"PRIx64" (%d)"
> +iommufd_backend_get_dirty_bitmap(int iommufd, uint32_t hwpt_id, uint64_t iova, uint64_t size, uint64_t flags, uint64_t page_size, int ret) " iommufd=%d hwpt=%u iova=0x%"PRIx64" size=0x%"PRIx64" flags=0x%"PRIx64" page_size=0x%"PRIx64" (%d)"
> iommufd_backend_invalidate_cache(int iommufd, uint32_t id, uint32_t data_type, uint32_t entry_len, uint32_t entry_num, uint32_t done_num, uint64_t data_ptr, int ret) " iommufd=%d id=%u data_type=%u entry_len=%u entry_num=%u done_num=%u data_ptr=0x%"PRIx64" (%d)"
On 10/17/25 10:22, Zhenzhong Duan wrote: > Pass IOMMU_HWPT_GET_DIRTY_BITMAP_NO_CLEAR when doing the last dirty > bitmap query right before unmap, no PTEs flushes. This accelerates the > query without issue because unmap will tear down the mapping anyway. > > Co-developed-by: Joao Martins <joao.m.martins@oracle.com> > Signed-off-by: Joao Martins <joao.m.martins@oracle.com> > Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com> > Tested-by: Xudong Hao <xudong.hao@intel.com> > Tested-by: Giovannio Cabiddu <giovanni.cabiddu@intel.com> > --- > include/system/iommufd.h | 2 +- > backends/iommufd.c | 5 +++-- > hw/vfio/iommufd.c | 5 +++-- > backends/trace-events | 2 +- > 4 files changed, 8 insertions(+), 6 deletions(-) > Reviewed-by: Cédric Le Goater <clg@redhat.com> Thanks, C.
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