From: Sumit Garg <sumit.garg@linaro.org>
To: jens.wiklander@linaro.org, jarkko.sakkinen@linux.intel.com,
dhowells@redhat.com
Cc: corbet@lwn.net, jejb@linux.ibm.com, zohar@linux.ibm.com,
jmorris@namei.org, serge@hallyn.com, casey@schaufler-ca.com,
ard.biesheuvel@linaro.org, daniel.thompson@linaro.org,
stuart.yoder@arm.com, janne.karhunen@gmail.com,
keyrings@vger.kernel.org, linux-integrity@vger.kernel.org,
linux-security-module@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, tee-dev@lists.linaro.org,
Sumit Garg <sumit.garg@linaro.org>
Subject: [Patch v3 1/7] tee: optee: allow kernel pages to register as shm
Date: Thu, 31 Oct 2019 19:28:37 +0530 [thread overview]
Message-ID: <1572530323-14802-2-git-send-email-sumit.garg@linaro.org> (raw)
In-Reply-To: <1572530323-14802-1-git-send-email-sumit.garg@linaro.org>
Kernel pages are marked as normal type memory only so allow kernel pages
to be registered as shared memory with OP-TEE.
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
---
drivers/tee/optee/call.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c
index 13b0269..cf2367b 100644
--- a/drivers/tee/optee/call.c
+++ b/drivers/tee/optee/call.c
@@ -554,6 +554,13 @@ static int check_mem_type(unsigned long start, size_t num_pages)
struct mm_struct *mm = current->mm;
int rc;
+ /*
+ * Allow kernel address to register with OP-TEE as kernel
+ * pages are configured as normal memory only.
+ */
+ if (virt_addr_valid(start))
+ return 0;
+
down_read(&mm->mmap_sem);
rc = __check_mem_type(find_vma(mm, start),
start + num_pages * PAGE_SIZE);
--
2.7.4
next prev parent reply other threads:[~2019-10-31 13:59 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-31 13:58 [Patch v3 0/7] Introduce TEE based Trusted Keys support Sumit Garg
2019-10-31 13:58 ` Sumit Garg [this message]
2019-10-31 13:58 ` [Patch v3 2/7] tee: enable support to register kernel memory Sumit Garg
2019-10-31 13:58 ` [Patch v3 3/7] tee: add private login method for kernel clients Sumit Garg
2019-10-31 13:58 ` [Patch v3 4/7] KEYS: trusted: Add generic trusted keys framework Sumit Garg
2019-10-31 13:58 ` [Patch v3 5/7] KEYS: trusted: Introduce TEE based Trusted Keys Sumit Garg
2019-10-31 13:58 ` [Patch v3 6/7] doc: keys: Document usage of " Sumit Garg
2019-10-31 21:47 ` Jarkko Sakkinen
2019-11-01 9:34 ` Sumit Garg
2019-11-01 20:19 ` Jarkko Sakkinen
2019-11-04 6:58 ` Sumit Garg
2019-11-04 20:55 ` Jarkko Sakkinen
2019-10-31 13:58 ` [Patch v3 7/7] MAINTAINERS: Add entry for " Sumit Garg
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