[PATCH 1/3] firmware: stratix10-svc: extend svc for attestation

From: tien . sung . ang
Date: Wed Jun 21 2023 - 02:16:14 EST

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From: Ang Tien Sung <tien.sung.ang@xxxxxxxxx>

Extend Intel service layer driver to support FPGA attestation features on
Intel FPGA SoC platforms, which makes sure the trustworthiness of FPGA
images currently running on a FPGA device.

Signed-off-by: Ang Tien Sung <tien.sung.ang@xxxxxxxxx>
---
drivers/firmware/stratix10-svc.c | 40 ++++++++-
include/linux/firmware/intel/stratix10-smc.h | 85 ++++++++++++++++++-
.../firmware/intel/stratix10-svc-client.h | 18 ++++
3 files changed, 140 insertions(+), 3 deletions(-)

diff --git a/drivers/firmware/stratix10-svc.c b/drivers/firmware/stratix10-svc.c
index 80f4e2d14e04..a277fe9c4db4 100644
--- a/drivers/firmware/stratix10-svc.c
+++ b/drivers/firmware/stratix10-svc.c
@@ -328,6 +328,7 @@ static void svc_thread_recv_status_ok(struct stratix10_svc_data *p_data,
case COMMAND_FCS_SEND_CERTIFICATE:
case COMMAND_FCS_DATA_ENCRYPTION:
case COMMAND_FCS_DATA_DECRYPTION:
+ case COMMAND_FCS_PSGSIGMA_TEARDOWN:
cb_data->status = BIT(SVC_STATUS_OK);
break;
case COMMAND_RECONFIG_DATA_SUBMIT:
@@ -361,6 +362,17 @@ static void svc_thread_recv_status_ok(struct stratix10_svc_data *p_data,
cb_data->kaddr2 = svc_pa_to_va(res.a2);
cb_data->kaddr3 = &res.a3;
break;
+ case COMMAND_FCS_GET_CHIP_ID:
+ cb_data->status = BIT(SVC_STATUS_OK);
+ cb_data->kaddr2 = &res.a2;
+ cb_data->kaddr3 = &res.a3;
+ break;
+ case COMMAND_FCS_ATTESTATION_SUBKEY:
+ case COMMAND_FCS_ATTESTATION_MEASUREMENTS:
+ cb_data->status = BIT(SVC_STATUS_OK);
+ cb_data->kaddr2 = svc_pa_to_va(res.a2);
+ cb_data->kaddr3 = &res.a3;
+ break;
default:
pr_warn("it shouldn't happen\n");
break;
@@ -514,10 +526,30 @@ static int svc_normal_to_secure_thread(void *data)
break;
case COMMAND_FCS_GET_PROVISION_DATA:
a0 = INTEL_SIP_SMC_FCS_GET_PROVISION_DATA;
- a1 = (unsigned long)pdata->paddr;
+ case COMMAND_FCS_PSGSIGMA_TEARDOWN:
+ a0 = INTEL_SIP_SMC_FCS_PSGSIGMA_TEARDOWN;
+ a1 = pdata->arg[0];
a2 = 0;
break;
-
+ case COMMAND_FCS_GET_CHIP_ID:
+ a0 = INTEL_SIP_SMC_FCS_CHIP_ID;
+ a1 = 0;
+ a2 = 0;
+ break;
+ case COMMAND_FCS_ATTESTATION_SUBKEY:
+ a0 = INTEL_SIP_SMC_FCS_ATTESTATION_SUBKEY;
+ a1 = (unsigned long)pdata->paddr;
+ a2 = (unsigned long)pdata->size;
+ a3 = (unsigned long)pdata->paddr_output;
+ a4 = (unsigned long)pdata->size_output;
+ break;
+ case COMMAND_FCS_ATTESTATION_MEASUREMENTS:
+ a0 = INTEL_SIP_SMC_FCS_ATTESTATION_MEASUREMENTS;
+ a1 = (unsigned long)pdata->paddr;
+ a2 = (unsigned long)pdata->size;
+ a3 = (unsigned long)pdata->paddr_output;
+ a4 = (unsigned long)pdata->size_output;
+ break;
/* for polling */
case COMMAND_POLL_SERVICE_STATUS:
a0 = INTEL_SIP_SMC_SERVICE_COMPLETED;
@@ -597,6 +629,10 @@ static int svc_normal_to_secure_thread(void *data)
case COMMAND_FCS_DATA_ENCRYPTION:
case COMMAND_FCS_DATA_DECRYPTION:
case COMMAND_FCS_RANDOM_NUMBER_GEN:
+ case COMMAND_FCS_PSGSIGMA_TEARDOWN:
+ case COMMAND_FCS_GET_CHIP_ID:
+ case COMMAND_FCS_ATTESTATION_SUBKEY:
+ case COMMAND_FCS_ATTESTATION_MEASUREMENTS:
cbdata->status = BIT(SVC_STATUS_INVALID_PARAM);
cbdata->kaddr1 = NULL;
cbdata->kaddr2 = NULL;
diff --git a/include/linux/firmware/intel/stratix10-smc.h b/include/linux/firmware/intel/stratix10-smc.h
index a718f853d457..d9f0251256e9 100644
--- a/include/linux/firmware/intel/stratix10-smc.h
+++ b/include/linux/firmware/intel/stratix10-smc.h
@@ -464,7 +464,7 @@ INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FPGA_CONFIG_COMPLETED_WRITE)
*/
#define INTEL_SIP_SMC_FUNCID_FIRMWARE_VERSION 31
#define INTEL_SIP_SMC_FIRMWARE_VERSION \
- INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FIRMWARE_VERSION)
+ INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FIRMWARE_VERSION)

/**
* Request INTEL_SIP_SMC_SVC_VERSION
@@ -595,4 +595,87 @@ INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FPGA_CONFIG_COMPLETED_WRITE)
#define INTEL_SIP_SMC_FCS_GET_PROVISION_DATA \
INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FCS_GET_PROVISION_DATA)

+/**
+ * Request INTEL_SIP_SMC_FCS_PSGSIGMA_TEARDOWN
+ * Sync call to tear down all previous black key provision sessions and to
+ * delete keys assicated with those sessions
+ *
+ * Call register usage:
+ * a0 INTEL_SIP_SMC_FCS_PSGSIGMA_TEARDOWN
+ * a1 the session ID
+ * a2-a7 not used
+ *
+ * Return status:
+ * a0 INTEL_SIP_SMC_STATUS_OK, INTEL_SIP_SMC_STATUS_ERROR or
+ * INTEL_SIP_SMC_STATUS_REJECTED
+ * a1 mailbox error if a0 is INTEL_SIP_SMC_STATUS_ERROR,
+ * not used if a0 is INTEL_SIP_SMC_STATUS_OK or
+ * INTEL_SIP_SMC_STATUS_REJECTED
+ * a2-a3 not used
+ */
+#define INTEL_SIP_SMC_FUNCID_FCS_PSGSIGMA_TEARDOWN 100
+#define INTEL_SIP_SMC_FCS_PSGSIGMA_TEARDOWN \
+ INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FCS_PSGSIGMA_TEARDOWN)
+
+/**
+ * Request INTEL_SIP_SMC_FCS_CHIP_ID
+ * Sync call to get the device ID
+ *
+ * Call register usage:
+ * a0 INTEL_SIP_SMC_FCS_CHIP_ID
+ * a1-a7 not used
+ *
+ * Return status:
+ * a0 INTEL_SIP_SMC_STATUS_OK, INTEL_SIP_SMC_STATUS_ERROR or
+ * INTEL_SIP_SMC_STATUS_REJECTED
+ * a1 mailbox error if a0 is INTEL_SIP_SMC_STATUS_ERROR
+ * a2 retrieved chipID value low 32 bits
+ * a3 retrieved chipID value high 32 bits
+ */
+#define INTEL_SIP_SMC_FUNCID_FCS_CHIP_ID 101
+#define INTEL_SIP_SMC_FCS_CHIP_ID \
+ INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FCS_CHIP_ID)
+
+/**
+ * Request INTEL_SIP_SMC_FCS_ATTESTATION_SUBKEY
+ * Sync call to the device attestation subkey
+ *
+ * Call register usage:
+ * a0 INTEL_SIP_SMC_FCS_ATTESTATION_SUBKEY
+ * a1 physical address of subkey command data
+ * a2 subkey command data size
+ * a3 physical address of to be filled subkey response data
+ * a4 subkey response data size
+ * a5-a7 not used
+ *
+ * Return status:
+ * a0 INTEL_SIP_SMC_STATUS_OK, or INTEL_SIP_SMC_STATUS_ERROR
+ * a1 mailbox error if a0 is INTEL_SIP_SMC_STATUS_ERROR
+ * a2 physical address of the filled subkey response data
+ * a3 size of the filled subkey response dat
+ */
+#define INTEL_SIP_SMC_FUNCID_FCS_ATTESTATION_SUBKEY 102
+#define INTEL_SIP_SMC_FCS_ATTESTATION_SUBKEY \
+ INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FCS_ATTESTATION_SUBKEY)
+
+/**
+ * Request INTEL_SIP_SMC_FCS_ATTESTATION_MEASUREMENTS
+ * Async call to get device attestation measurements
+ *
+ * Call register usage:
+ * a0 INTEL_SIP_SMC_FCS_ATTESTATION_MEASUREMENTS
+ * a1 physical address of measurement command data
+ * a2 measurement command data size
+ * a3 physical address of to be filled measurement response data
+ * a4 measurement response data size
+ *
+ * Return status:
+ * a0 INTEL_SIP_SMC_STATUS_OK, or INTEL_SIP_SMC_STATUS_ERROR
+ * a1 mailbox error if a0 is INTEL_SIP_SMC_STATUS_ERROR
+ * a2 physical address of the filled subkey measurement data
+ * a3 size of the filled subkey measurement data
+ */
+#define INTEL_SIP_SMC_FUNCID_FCS_ATTESTATION_MEASUREMENTS 103
+#define INTEL_SIP_SMC_FCS_ATTESTATION_MEASUREMENTS \
+ INTEL_SIP_SMC_FAST_CALL_VAL(INTEL_SIP_SMC_FUNCID_FCS_ATTESTATION_MEASUREMENTS)
#endif
diff --git a/include/linux/firmware/intel/stratix10-svc-client.h b/include/linux/firmware/intel/stratix10-svc-client.h
index 0c16037fd08d..5346967dd2fe 100644
--- a/include/linux/firmware/intel/stratix10-svc-client.h
+++ b/include/linux/firmware/intel/stratix10-svc-client.h
@@ -138,6 +138,19 @@ struct stratix10_svc_chan;
*
* @COMMAND_FCS_RANDOM_NUMBER_GEN: generate a random number, return status
* is SVC_STATUS_OK, SVC_STATUS_ERROR
+ *
+ * @COMMAND_FCS_PSGSIGMA_TEARDOWN: tear down all previous black key
+ * provision sessions and delete keys assicated with those sessions,
+ * return status is SVC_STATUS_SUBMITTED or SVC_STATUS_ERROR
+ *
+ * @COMMAND_FCS_GET_CHIP_ID: get the device's chip ID, return status is
+ * SVC_STATUS_SUBMITTED or SVC_STATUS_ERROR
+ *
+ * @COMMAND_FCS_ATTESTATION_SUBKEY: get device's attestation subkey,
+ * return status is SVC_STATUS_SUBMITTED or SVC_STATUS_ERROR
+ *
+ * @COMMAND_FCS_ATTESTATION_MEASUREMENTS: to get device's attestation
+ * measurements, return status is SVC_STATUS_SUBMITTED or SVC_STATUS_ERROR
*/
enum stratix10_svc_command_code {
/* for FPGA */
@@ -162,6 +175,11 @@ enum stratix10_svc_command_code {
COMMAND_FCS_DATA_ENCRYPTION,
COMMAND_FCS_DATA_DECRYPTION,
COMMAND_FCS_RANDOM_NUMBER_GEN,
+ /* for Attestation */
+ COMMAND_FCS_PSGSIGMA_TEARDOWN = 30,
+ COMMAND_FCS_GET_CHIP_ID,
+ COMMAND_FCS_ATTESTATION_SUBKEY,
+ COMMAND_FCS_ATTESTATION_MEASUREMENTS,
/* for general status poll */
COMMAND_POLL_SERVICE_STATUS = 40,
/* Non-mailbox SMC Call */
--
2.25.1

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