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block/nvme: Change size and alignment of IDENTIFY response buffer

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In preparation of 64kB host page support, let's change the size
and alignment of the IDENTIFY command response buffer so that
the VFIO DMA MAP succeeds. We align 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: 20201029093306.1063879-20-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 10:33:00 +01:00 committed by Stefan Hajnoczi
parent a652a3ec69
commit 0aecd06049
1 changed files with 5 additions and 4 deletions
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9
block/nvme.c
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@ -522,19 +522,20 @@ static bool nvme_identify(BlockDriverState *bs, int namespace, Error **errp)
.opcode = NVME_ADM_CMD_IDENTIFY,
.cdw10 = cpu_to_le32(0x1),
};
size_t id_size = QEMU_ALIGN_UP(sizeof(*id), qemu_real_host_page_size);
id = qemu_try_memalign(s->page_size, sizeof(*id));
id = qemu_try_memalign(qemu_real_host_page_size, id_size);
if (!id) {
error_setg(errp, "Cannot allocate buffer for identify response");
goto out;
}
r = qemu_vfio_dma_map(s->vfio, id, sizeof(*id), true, &iova);
r = qemu_vfio_dma_map(s->vfio, id, id_size, true, &iova);
if (r) {
error_setg(errp, "Cannot map buffer for DMA");
goto out;
}
memset(id, 0, sizeof(*id));
memset(id, 0, id_size);
cmd.dptr.prp1 = cpu_to_le64(iova);
if (nvme_admin_cmd_sync(bs, &cmd)) {
error_setg(errp, "Failed to identify controller");
@ -556,7 +557,7 @@ static bool nvme_identify(BlockDriverState *bs, int namespace, Error **errp)
s->supports_write_zeroes = !!(oncs & NVME_ONCS_WRITE_ZEROES);
s->supports_discard = !!(oncs & NVME_ONCS_DSM);
memset(id, 0, sizeof(*id));
memset(id, 0, id_size);
cmd.cdw10 = 0;
cmd.nsid = cpu_to_le32(namespace);
if (nvme_admin_cmd_sync(bs, &cmd)) {