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block/nvme: Align iov's va and size on host page size 

Make sure iov's va and size are properly aligned on the
host page size.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20201029093306.1063879-23-philmd@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
master
Eric Auger 2020-10-29 10:33:03 +01:00 committed by Stefan Hajnoczi
parent f8fd3ebac3
commit 9e13d59884
1 changed files with 8 additions and 6 deletions
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14
block/nvme.c
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@ -1015,11 +1015,12 @@ static coroutine_fn int nvme_cmd_map_qiov(BlockDriverState *bs, NvmeCmd *cmd,
for (i = 0; i < qiov->niov; ++i) {
bool retry = true;
uint64_t iova;
size_t len = QEMU_ALIGN_UP(qiov->iov[i].iov_len,
qemu_real_host_page_size);
try_map:
r = qemu_vfio_dma_map(s->vfio,
qiov->iov[i].iov_base,
qiov->iov[i].iov_len,
true, &iova);
len, true, &iova);
if (r == -ENOMEM && retry) {
retry = false;
trace_nvme_dma_flush_queue_wait(s);
@ -1163,8 +1164,9 @@ static inline bool nvme_qiov_aligned(BlockDriverState *bs,
BDRVNVMeState *s = bs->opaque;
for (i = 0; i < qiov->niov; ++i) {
if (!QEMU_PTR_IS_ALIGNED(qiov->iov[i].iov_base, s->page_size) ||
!QEMU_IS_ALIGNED(qiov->iov[i].iov_len, s->page_size)) {
if (!QEMU_PTR_IS_ALIGNED(qiov->iov[i].iov_base,
qemu_real_host_page_size) ||
!QEMU_IS_ALIGNED(qiov->iov[i].iov_len, qemu_real_host_page_size)) {
trace_nvme_qiov_unaligned(qiov, i, qiov->iov[i].iov_base,
qiov->iov[i].iov_len, s->page_size);
return false;
@ -1180,7 +1182,7 @@ static int nvme_co_prw(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
int r;
uint8_t *buf = NULL;
QEMUIOVector local_qiov;
size_t len = QEMU_ALIGN_UP(bytes, qemu_real_host_page_size);
assert(QEMU_IS_ALIGNED(offset, s->page_size));
assert(QEMU_IS_ALIGNED(bytes, s->page_size));
assert(bytes <= s->max_transfer);
@ -1190,7 +1192,7 @@ static int nvme_co_prw(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
}
s->stats.unaligned_accesses++;
trace_nvme_prw_buffered(s, offset, bytes, qiov->niov, is_write);
buf = qemu_try_memalign(s->page_size, bytes);
buf = qemu_try_memalign(qemu_real_host_page_size, len);
if (!buf) {
return -ENOMEM;