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block/nvme: Change size and alignment of prp_list_pages 

In preparation of 64kB host page support, let's change the size
and alignment of the prp_list_pages so that the VFIO DMA MAP succeeds
with 64kB host page size. We align on the host page size.

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Eric Auger <eric.auger@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: 20201029093306.1063879-22-philmd@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
This commit is contained in:
Eric Auger 2020-10-29 10:33:02 +01:00 committed by Stefan Hajnoczi
parent 2387aaced7
commit f8fd3ebac3
1 changed files with 6 additions and 5 deletions
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11
block/nvme.c
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@ -215,6 +215,7 @@ static NVMeQueuePair *nvme_create_queue_pair(BDRVNVMeState *s,
int i, r;
NVMeQueuePair *q;
uint64_t prp_list_iova;
size_t bytes;
q = g_try_new0(NVMeQueuePair, 1);
if (!q) {
@ -222,19 +223,19 @@ static NVMeQueuePair *nvme_create_queue_pair(BDRVNVMeState *s,
}
trace_nvme_create_queue_pair(idx, q, size, aio_context,
event_notifier_get_fd(s->irq_notifier));
q->prp_list_pages = qemu_try_memalign(s->page_size,
s->page_size * NVME_NUM_REQS);
bytes = QEMU_ALIGN_UP(s->page_size * NVME_NUM_REQS,
qemu_real_host_page_size);
q->prp_list_pages = qemu_try_memalign(qemu_real_host_page_size, bytes);
if (!q->prp_list_pages) {
goto fail;
}
memset(q->prp_list_pages, 0, s->page_size * NVME_NUM_REQS);
memset(q->prp_list_pages, 0, bytes);
qemu_mutex_init(&q->lock);
q->s = s;
q->index = idx;
qemu_co_queue_init(&q->free_req_queue);
q->completion_bh = aio_bh_new(aio_context, nvme_process_completion_bh, q);
r = qemu_vfio_dma_map(s->vfio, q->prp_list_pages,
s->page_size * NVME_NUM_REQS,
r = qemu_vfio_dma_map(s->vfio, q->prp_list_pages, bytes,
false, &prp_list_iova);
if (r) {
goto fail;