On Thu, 2025-09-04 at 11:22 +0100, Jonathan Cameron wrote:
> On Thu, 4 Sep 2025 13:10:57 +1000
> Wilfred Mallawa <[email protected]> wrote:
>
> > From: Wilfred Mallawa <[email protected]>
> >
> > Adds the NVMe Admin Security Send/Receive command support with
> > support
> > for DMTFs SPDM. The transport binding for SPDM is defined in the
> > DMTF DSP0286.
> >
> > Signed-off-by: Wilfred Mallawa <[email protected]>
> Hi Wilfred,
>
> I haven't even opened the nvme spec on basis others are covering that
> part well. So this is just a review based on the code in this patch
> so mostly style stuff.
>
> Jonathan
>
Hey Jonathan,
Sounds good! Thanks for the review. Comments inline.
Regards,
Wilfred
> > ---
> > hw/nvme/ctrl.c | 213
> > ++++++++++++++++++++++++++++++++++++++++++-
> > hw/nvme/nvme.h | 5 +
> > include/block/nvme.h | 15 +++
> > 3 files changed, 232 insertions(+), 1 deletion(-)
> >
> > diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
> > index f5ee6bf260..df72599bcc 100644
> > --- a/hw/nvme/ctrl.c
> > +++ b/hw/nvme/ctrl.c
> > @@ -282,6 +282,8 @@ static const uint32_t nvme_cse_acs_default[256]
> > = {
> > [NVME_ADM_CMD_FORMAT_NVM] = NVME_CMD_EFF_CSUPP |
> > NVME_CMD_EFF_LBCC,
> > [NVME_ADM_CMD_DIRECTIVE_RECV] = NVME_CMD_EFF_CSUPP,
> > [NVME_ADM_CMD_DIRECTIVE_SEND] = NVME_CMD_EFF_CSUPP,
> > + [NVME_ADM_CMD_SECURITY_SEND] = NVME_CMD_EFF_CSUPP,
> > + [NVME_ADM_CMD_SECURITY_RECV] = NVME_CMD_EFF_CSUPP,
>
> Maybe it's an email thing but that alignment of = looks off by one
> space.
Not email, will fix!
>
> > };
> >
> > static const uint32_t nvme_cse_iocs_nvm_default[256] = {
> > @@ -7282,6 +7284,210 @@ static uint16_t nvme_dbbuf_config(NvmeCtrl
> > *n, const NvmeRequest *req)
> > return NVME_SUCCESS;
> > }
> >
> > +static uint16_t nvme_sec_prot_spdm_send(NvmeCtrl *n, NvmeRequest
> > *req)
> > +{
> > + StorageSpdmTransportHeader hdr = {0};
> > + g_autofree uint8_t *sec_buf = NULL;
> > + uint32_t transfer_len = le32_to_cpu(req->cmd.cdw11);
> > + uint32_t transport_transfer_len = transfer_len;
> > + uint32_t dw10 = le32_to_cpu(req->cmd.cdw10);
> > + uint32_t recvd;
> > + uint16_t nvme_cmd_status, ret;
> > + uint8_t secp = extract32(dw10, 24, 8);
> > + uint8_t spsp1 = extract32(dw10, 16, 8);
> > + uint8_t spsp0 = extract32(dw10, 8, 8);
>
> See below. 16 bit field seems more logical to me.
>
> > + bool spdm_res;
> > +
> > + if (transport_transfer_len > UINT32_MAX - sizeof(hdr)) {
> > + return NVME_INVALID_FIELD | NVME_DNR;
> > + }
> > +
> > + transport_transfer_len += sizeof(hdr);
> > + if (transport_transfer_len >
> > SPDM_SOCKET_MAX_MESSAGE_BUFFER_SIZE) {
> > + return NVME_INVALID_FIELD | NVME_DNR;
> > + }
> > +
> > + ret = nvme_check_mdts(n, transport_transfer_len);
> > + if (ret != NVME_SUCCESS) {
> > + return ret;
> > + }
> > +
> > + /* Generate the NVMe transport header */
> > + hdr.security_protocol = secp;
> > + hdr.security_protocol_specific = cpu_to_le16((spsp1 << 8) |
> > spsp0);
> > + hdr.length = cpu_to_le32(transfer_len);
> > +
> > + sec_buf = g_try_malloc0(transport_transfer_len);
> > + if (!sec_buf) {
> > + return NVME_INTERNAL_DEV_ERROR;
> > + }
> > +
> > + /* Attach the transport header */
> > + memcpy(sec_buf, &hdr, sizeof(hdr));
> > + ret = nvme_h2c(n, sec_buf + sizeof(hdr), transfer_len, req);
> > + if (ret) {
> > + return ret;
> > + }
> > +
> > + spdm_res = spdm_socket_send(n->spdm_socket,
> > SPDM_SOCKET_STORAGE_CMD_IF_SEND,
> > + SPDM_SOCKET_TRANSPORT_TYPE_NVME,
> > sec_buf,
> > + transport_transfer_len);
> > + if (!spdm_res) {
> > + return NVME_DATA_TRAS_ERROR | NVME_DNR;
> > + }
> > +
> > + /* The responder shall ack with message status */
> > + recvd = spdm_socket_receive(n->spdm_socket,
> > SPDM_SOCKET_TRANSPORT_TYPE_NVME,
> > + (uint8_t *)&nvme_cmd_status,
>
> As in earlier patch, spdm_socket_receive() seems to take a void * so
> no cast
> should be needed and definitely not to a uint8_t *!
Ah yeah, will fixup.
>
> > + SPDM_SOCKET_MAX_MSG_STATUS_LEN);
> > +
> > + nvme_cmd_status = be16_to_cpu(nvme_cmd_status);
> > +
> > + if (recvd < SPDM_SOCKET_MAX_MSG_STATUS_LEN) {
> > + return NVME_DATA_TRAS_ERROR | NVME_DNR;
> > + }
> > +
> > + return nvme_cmd_status;
> > +}
> > +
> > +/* From host to controller */
> > +static uint16_t nvme_security_send(NvmeCtrl *n, NvmeRequest *req)
> > +{
> > + uint32_t dw10 = le32_to_cpu(req->cmd.cdw10);
> > + uint8_t secp = (dw10 >> 24) & 0xff;
>
> Used extract32() below. Why not for this one?
Missed it! Will fixup :).
>
> > +
> > + switch (secp) {
> > + case NVME_SEC_PROT_DMTF_SPDM:
> > + if (n->spdm_socket <= 0) {
> > + return NVME_INVALID_FIELD | NVME_DNR;
> > + }
> > + return nvme_sec_prot_spdm_send(n, req);
> > + default:
> > + /* Unsupported Security Protocol Type */
> > + return NVME_INVALID_FIELD | NVME_DNR;
> > + }
> > +
> > + return NVME_INVALID_FIELD | NVME_DNR;
> > +}
> > +
> > +static uint16_t nvme_sec_prot_spdm_receive(NvmeCtrl *n,
> > NvmeRequest *req)
> > +{
> > + StorageSpdmTransportHeader hdr;
> > + g_autofree uint8_t *rsp_spdm_buf = NULL;
> > + uint32_t dw10 = le32_to_cpu(req->cmd.cdw10);
> > + uint32_t alloc_len = le32_to_cpu(req->cmd.cdw11);
> > + uint32_t recvd, spdm_res;
> > + uint16_t nvme_cmd_status, ret;
> > + uint8_t secp = extract32(dw10, 24, 8);
> > + uint8_t spsp1 = extract32(dw10, 16, 8);
> > + uint8_t spsp0 = extract32(dw10, 8, 8);
>
> This is a little odd. You break out two 8 bit fields here just
> to combine them again below. Why not a 16bit field?
> If its about spec alignment maybe call that field spsp0_1
>
Ah yeah, I think I split it out from when DSP0286 was WIP and it seemed
like we may need to parse SPSP here. But doesn't seem to be case, at-
least for now.
>
> > +
> > + if (!alloc_len) {
> > + return NVME_INVALID_FIELD | NVME_DNR;
> > + }
> > +
> > + /* Generate the NVMe transport header */
> > + hdr = (StorageSpdmTransportHeader) {
> > + .security_protocol = secp,
> > + .security_protocol_specific = cpu_to_le16((spsp1 << 8) |
> > spsp0),
> > + .length = cpu_to_le32(alloc_len),
> > + };
> > +
> > + /* Forward if_recv to the SPDM Server with SPSP0 */
> > + spdm_res = spdm_socket_send(n->spdm_socket,
> > SPDM_SOCKET_STORAGE_CMD_IF_RECV,
> > + SPDM_SOCKET_TRANSPORT_TYPE_NVME,
> > + (uint8_t *)&hdr, sizeof(hdr));
>
> As above.
>
> > + if (!spdm_res) {
> > + return NVME_DATA_TRAS_ERROR | NVME_DNR;
> > + }
> > +
> > + /* The responder shall ack with message status */
> > + recvd = spdm_socket_receive(n->spdm_socket,
> > SPDM_SOCKET_TRANSPORT_TYPE_NVME,
> > + (uint8_t *)&nvme_cmd_status,
>
> As above - seems to be a spurious cast.
>
Will fixup for next version.
Cheers,
Wilfred
>
>
