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See http://spamassassin.org/tag/ for more details. X-Headers-End: 1d08RO-0006MV-JI Subject: [tpmdd-devel] [PATCH 3/3] tpm: vtpm_proxy: Add ioctl to request locality prepended to command X-BeenThere: tpmdd-devel@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: Tpm Device Driver maintainance List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: tpmdd-devel-bounces@lists.sourceforge.net Add an ioctl to request that the locality be prepended to every TPM command. Signed-off-by: Stefan Berger --- drivers/char/tpm/tpm_vtpm_proxy.c | 16 ++++++++++++---- include/uapi/linux/vtpm_proxy.h | 4 +++- 2 files changed, 15 insertions(+), 5 deletions(-) diff --git a/drivers/char/tpm/tpm_vtpm_proxy.c b/drivers/char/tpm/tpm_vtpm_proxy.c index bf59426..5f34973 100644 --- a/drivers/char/tpm/tpm_vtpm_proxy.c +++ b/drivers/char/tpm/tpm_vtpm_proxy.c @@ -52,7 +52,8 @@ struct proxy_dev { }; /* all supported flags */ -#define VTPM_PROXY_FLAGS_ALL (VTPM_PROXY_FLAG_TPM2) +#define VTPM_PROXY_FLAGS_ALL (VTPM_PROXY_FLAG_TPM2 | \ + VTPM_PROXY_FLAG_PREPEND_LOCALITY) static struct workqueue_struct *workqueue; @@ -77,8 +78,9 @@ static ssize_t vtpm_proxy_fops_read(struct file *filp, char __user *buf, size_t count, loff_t *off) { struct proxy_dev *proxy_dev = filp->private_data; - size_t len; - int sig, rc; + size_t len, offset = 0; + int sig, rc = 0; + uint8_t locality; sig = wait_event_interruptible(proxy_dev->wq, proxy_dev->req_len != 0 || @@ -102,7 +104,13 @@ static ssize_t vtpm_proxy_fops_read(struct file *filp, char __user *buf, return -EIO; } - rc = copy_to_user(buf, proxy_dev->buffer, len); + if (proxy_dev->flags & VTPM_PROXY_FLAG_PREPEND_LOCALITY) { + locality = proxy_dev->chip->locality; + offset = sizeof(locality); + rc = copy_to_user(buf, &locality, offset); + } + if (!rc) + rc = copy_to_user(&buf[offset], proxy_dev->buffer, len); memset(proxy_dev->buffer, 0, len); proxy_dev->req_len = 0; diff --git a/include/uapi/linux/vtpm_proxy.h b/include/uapi/linux/vtpm_proxy.h index 83e64e7..512a29e 100644 --- a/include/uapi/linux/vtpm_proxy.h +++ b/include/uapi/linux/vtpm_proxy.h @@ -22,9 +22,11 @@ /** * enum vtpm_proxy_flags - flags for the proxy TPM * @VTPM_PROXY_FLAG_TPM2: the proxy TPM uses TPM 2.0 protocol + * @VTPM_PROXY_PREPEND_LOCALITY:locality byte prepended on each command */ enum vtpm_proxy_flags { - VTPM_PROXY_FLAG_TPM2 = 1, + VTPM_PROXY_FLAG_TPM2 = 1, + VTPM_PROXY_FLAG_PREPEND_LOCALITY = 2, }; /**