[PATCH v4 4/9] vringh: define the stride used for translation
flat view
STALE1294d
SUPERSEDED
From: Stefano Garzarella <sgarzare@redhat.com>
Date: 2023-03-24 15:38:15
Also in:
kvm, lkml, virtualization
Subsystem:
the rest, virtio host (vhost) · Maintainers:
Linus Torvalds, "Michael S. Tsirkin", Jason Wang, Eugenio Pérez
Revision v4 of 5 in this series.
Revisions (5)
Define a macro to be reused in the different parts of the code.
Useful for the next patches where we add more arrays to manage also
translations with user VA.
Suggested-by: Eugenio Perez Martin <eperezma@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
---
Notes:
v4:
- added this patch with the changes extracted from the next patch [Eugenio]
- used _STRIDE instead of _SIZE [Eugenio]
drivers/vhost/vringh.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/vhost/vringh.c b/drivers/vhost/vringh.c
index 0ba3ef809e48..4aee230f7622 100644
--- a/drivers/vhost/vringh.c
+++ b/drivers/vhost/vringh.c@@ -1141,13 +1141,15 @@ static int iotlb_translate(const struct vringh *vrh, return ret; } +#define IOTLB_IOV_STRIDE 16 + static inline int copy_from_iotlb(const struct vringh *vrh, void *dst, void *src, size_t len) { u64 total_translated = 0; while (total_translated < len) { - struct bio_vec iov[16]; + struct bio_vec iov[IOTLB_IOV_STRIDE]; struct iov_iter iter; u64 translated; int ret;
@@ -1180,7 +1182,7 @@ static inline int copy_to_iotlb(const struct vringh *vrh, void *dst, u64 total_translated = 0; while (total_translated < len) { - struct bio_vec iov[16]; + struct bio_vec iov[IOTLB_IOV_STRIDE]; struct iov_iter iter; u64 translated; int ret;
--
2.39.2