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Thu, 31 Oct 2019 06:59:39 -0700 (PDT) From: Sumit Garg To: jens.wiklander@linaro.org, jarkko.sakkinen@linux.intel.com, dhowells@redhat.com Subject: [Patch v3 1/7] tee: optee: allow kernel pages to register as shm Date: Thu, 31 Oct 2019 19:28:37 +0530 Message-Id: <1572530323-14802-2-git-send-email-sumit.garg@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1572530323-14802-1-git-send-email-sumit.garg@linaro.org> References: <1572530323-14802-1-git-send-email-sumit.garg@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191031_065942_049496_4864FBAB X-CRM114-Status: GOOD ( 11.11 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sumit Garg , daniel.thompson@linaro.org, janne.karhunen@gmail.com, corbet@lwn.net, jejb@linux.ibm.com, ard.biesheuvel@linaro.org, linux-doc@vger.kernel.org, jmorris@namei.org, zohar@linux.ibm.com, linux-kernel@vger.kernel.org, tee-dev@lists.linaro.org, linux-security-module@vger.kernel.org, keyrings@vger.kernel.org, stuart.yoder@arm.com, casey@schaufler-ca.com, linux-integrity@vger.kernel.org, linux-arm-kernel@lists.infradead.org, serge@hallyn.com MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.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 Reviewed-by: Jarkko Sakkinen Reviewed-by: Jens Wiklander --- 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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel