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(unknown [9.47.158.152]) by b03ledav001.gho.boulder.ibm.com (Postfix) with ESMTP; Thu, 5 Aug 2021 21:53:06 +0000 (GMT) From: Stefan Berger To: jarkko@kernel.org Cc: peterhuewe@gmx.de, jgg@ziepe.ca, linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, Stefan Berger , Nayna Jain , George Wilson Subject: [PATCH v3 1/2] tpm: ibmvtpm: Rename tpm_process_cmd to tpm_status and define flag Date: Thu, 5 Aug 2021 17:52:55 -0400 Message-Id: <20210805215256.1293987-2-stefanb@linux.vnet.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210805215256.1293987-1-stefanb@linux.vnet.ibm.com> References: <20210805215256.1293987-1-stefanb@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: kcR_3yBxen3qt7XyMCddzr7uVu29hbL9 X-Proofpoint-ORIG-GUID: TzjMDi9T1IsJIzD7X8ygV7YJAABmMSue X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.790 definitions=2021-08-05_11:2021-08-05,2021-08-05 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxscore=0 bulkscore=0 mlxlogscore=999 malwarescore=0 phishscore=0 suspectscore=0 spamscore=0 adultscore=0 lowpriorityscore=0 impostorscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2107140000 definitions=main-2108050127 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Stefan Berger Rename the field tpm_processing_cmd to tpm_status in ibmvtpm_dev and set the TPM_STATUS_BUSY flag while the vTPM is busy processing a command. Fixes: 6674ff145eef ("tpm_ibmvtpm: properly handle interrupted packet receptions") Signed-off-by: Stefan Berger Cc: Nayna Jain Cc: George Wilson --- drivers/char/tpm/tpm_ibmvtpm.c | 14 ++++++++------ drivers/char/tpm/tpm_ibmvtpm.h | 3 ++- 2 files changed, 10 insertions(+), 7 deletions(-) diff --git a/drivers/char/tpm/tpm_ibmvtpm.c b/drivers/char/tpm/tpm_ibmvtpm.c index 903604769de9..cd6457061a2e 100644 --- a/drivers/char/tpm/tpm_ibmvtpm.c +++ b/drivers/char/tpm/tpm_ibmvtpm.c @@ -113,7 +113,8 @@ static int tpm_ibmvtpm_recv(struct tpm_chip *chip, u8 *buf, size_t count) return 0; } - sig = wait_event_interruptible(ibmvtpm->wq, !ibmvtpm->tpm_processing_cmd); + sig = wait_event_interruptible(ibmvtpm->wq, + (ibmvtpm->tpm_status & TPM_STATUS_BUSY) == 0); if (sig) return -EINTR; @@ -220,11 +221,12 @@ static int tpm_ibmvtpm_send(struct tpm_chip *chip, u8 *buf, size_t count) return -EIO; } - if (ibmvtpm->tpm_processing_cmd) { + if ((ibmvtpm->tpm_status & TPM_STATUS_BUSY)) { dev_info(ibmvtpm->dev, "Need to wait for TPM to finish\n"); /* wait for previous command to finish */ - sig = wait_event_interruptible(ibmvtpm->wq, !ibmvtpm->tpm_processing_cmd); + sig = wait_event_interruptible(ibmvtpm->wq, + (ibmvtpm->tpm_status & TPM_STATUS_BUSY) == 0); if (sig) return -EINTR; } @@ -237,7 +239,7 @@ static int tpm_ibmvtpm_send(struct tpm_chip *chip, u8 *buf, size_t count) * set the processing flag before the Hcall, since we may get the * result (interrupt) before even being able to check rc. */ - ibmvtpm->tpm_processing_cmd = true; + ibmvtpm->tpm_status |= TPM_STATUS_BUSY; again: rc = ibmvtpm_send_crq(ibmvtpm->vdev, @@ -255,7 +257,7 @@ static int tpm_ibmvtpm_send(struct tpm_chip *chip, u8 *buf, size_t count) goto again; } dev_err(ibmvtpm->dev, "tpm_ibmvtpm_send failed rc=%d\n", rc); - ibmvtpm->tpm_processing_cmd = false; + ibmvtpm->tpm_status &= ~TPM_STATUS_BUSY; } spin_unlock(&ibmvtpm->rtce_lock); @@ -550,7 +552,7 @@ static void ibmvtpm_crq_process(struct ibmvtpm_crq *crq, case VTPM_TPM_COMMAND_RES: /* len of the data in rtce buffer */ ibmvtpm->res_len = be16_to_cpu(crq->len); - ibmvtpm->tpm_processing_cmd = false; + ibmvtpm->tpm_status &= ~TPM_STATUS_BUSY; wake_up_interruptible(&ibmvtpm->wq); return; default: diff --git a/drivers/char/tpm/tpm_ibmvtpm.h b/drivers/char/tpm/tpm_ibmvtpm.h index b92aa7d3e93e..252f1cccdfc5 100644 --- a/drivers/char/tpm/tpm_ibmvtpm.h +++ b/drivers/char/tpm/tpm_ibmvtpm.h @@ -41,7 +41,8 @@ struct ibmvtpm_dev { wait_queue_head_t wq; u16 res_len; u32 vtpm_version; - bool tpm_processing_cmd; + u8 tpm_status; +#define TPM_STATUS_BUSY (1 << 0) /* vtpm is processing a command */ }; #define CRQ_RES_BUF_SIZE PAGE_SIZE -- 2.31.1