From: Tyler Hicks <tyhicks@linux.microsoft.com>
To: Jens Wiklander <jens.wiklander@linaro.org>,
Allen Pais <apais@linux.microsoft.com>,
Sumit Garg <sumit.garg@linaro.org>,
Peter Huewe <peterhuewe@gmx.de>,
Jarkko Sakkinen <jarkko@kernel.org>,
Jason Gunthorpe <jgg@ziepe.ca>,
Vikas Gupta <vikas.gupta@broadcom.com>
Cc: "Thirupathaiah Annapureddy" <thiruan@microsoft.com>,
"Pavel Tatashin" <pasha.tatashin@soleen.com>,
"Rafał Miłecki" <zajec5@gmail.com>,
op-tee@lists.trustedfirmware.org,
linux-integrity@vger.kernel.org,
bcm-kernel-feedback-list@broadcom.com,
linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v4 5/8] tee: add tee_shm_alloc_kernel_buf()
Date: Thu, 10 Jun 2021 16:09:10 -0500 [thread overview]
Message-ID: <20210610210913.536081-6-tyhicks@linux.microsoft.com> (raw)
In-Reply-To: <20210610210913.536081-1-tyhicks@linux.microsoft.com>
From: Jens Wiklander <jens.wiklander@linaro.org>
Adds a new function tee_shm_alloc_kernel_buf() to allocate shared memory
from a kernel driver. This function can later be made more lightweight
by unnecessary dma-buf export.
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Tyler Hicks <tyhicks@linux.microsoft.com>
---
drivers/tee/tee_shm.c | 18 ++++++++++++++++++
include/linux/tee_drv.h | 1 +
2 files changed, 19 insertions(+)
diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c
index 00472f5ce22e..c65e44707cd6 100644
--- a/drivers/tee/tee_shm.c
+++ b/drivers/tee/tee_shm.c
@@ -193,6 +193,24 @@ struct tee_shm *tee_shm_alloc(struct tee_context *ctx, size_t size, u32 flags)
}
EXPORT_SYMBOL_GPL(tee_shm_alloc);
+/**
+ * tee_shm_alloc_kernel_buf() - Allocate shared memory for kernel buffer
+ * @ctx: Context that allocates the shared memory
+ * @size: Requested size of shared memory
+ *
+ * The returned memory registered in secure world and is suitable to be
+ * passed as a memory buffer in parameter argument to
+ * tee_client_invoke_func(). The memory allocated is later freed with a
+ * call to tee_shm_free().
+ *
+ * @returns a pointer to 'struct tee_shm'
+ */
+struct tee_shm *tee_shm_alloc_kernel_buf(struct tee_context *ctx, size_t size)
+{
+ return tee_shm_alloc(ctx, size, TEE_SHM_MAPPED | TEE_SHM_DMA_BUF);
+}
+EXPORT_SYMBOL_GPL(tee_shm_alloc_kernel_buf);
+
struct tee_shm *tee_shm_register(struct tee_context *ctx, unsigned long addr,
size_t length, u32 flags)
{
diff --git a/include/linux/tee_drv.h b/include/linux/tee_drv.h
index 54269e47ac9a..8990f7628387 100644
--- a/include/linux/tee_drv.h
+++ b/include/linux/tee_drv.h
@@ -332,6 +332,7 @@ void *tee_get_drvdata(struct tee_device *teedev);
* @returns a pointer to 'struct tee_shm'
*/
struct tee_shm *tee_shm_alloc(struct tee_context *ctx, size_t size, u32 flags);
+struct tee_shm *tee_shm_alloc_kernel_buf(struct tee_context *ctx, size_t size);
/**
* tee_shm_register() - Register shared memory buffer
--
2.25.1
next prev parent reply other threads:[~2021-06-10 21:10 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-10 21:09 [PATCH v4 0/8] tee: Improve support for kexec and kdump Tyler Hicks
2021-06-10 21:09 ` [PATCH v4 1/8] optee: Fix memory leak when failing to register shm pages Tyler Hicks
2021-06-11 9:05 ` Jens Wiklander
2021-06-10 21:09 ` [PATCH v4 2/8] optee: Refuse to load the driver under the kdump kernel Tyler Hicks
2021-06-11 9:08 ` Jens Wiklander
2021-06-10 21:09 ` [PATCH v4 3/8] optee: fix tee out of memory failure seen during kexec reboot Tyler Hicks
2021-06-11 9:11 ` Jens Wiklander
2021-06-11 12:53 ` Tyler Hicks
2021-06-14 7:21 ` Jens Wiklander
2021-06-14 7:22 ` Jens Wiklander
2021-06-10 21:09 ` [PATCH v4 4/8] optee: Clear stale cache entries during initialization Tyler Hicks
2021-06-14 8:27 ` Jens Wiklander
2021-06-14 19:06 ` Tyler Hicks
2021-06-14 19:15 ` Jens Wiklander
2021-06-10 21:09 ` Tyler Hicks [this message]
2021-06-10 21:09 ` [PATCH v4 6/8] tee: Support kernel shm registration without dma-buf backing Tyler Hicks
2021-06-11 5:16 ` Sumit Garg
2021-06-11 13:09 ` Tyler Hicks
2021-06-11 13:16 ` Tyler Hicks
2021-06-12 8:19 ` Sumit Garg
2021-06-13 8:16 ` Tyler Hicks
2021-06-14 4:59 ` Sumit Garg
2021-06-10 21:09 ` [PATCH v4 7/8] tpm_ftpm_tee: Free and unregister TEE shared memory during kexec Tyler Hicks
2021-06-15 13:04 ` Jarkko Sakkinen
2021-06-10 21:09 ` [PATCH v4 8/8] firmware: tee_bnxt: Release TEE shm, session, and context " Tyler Hicks
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210610210913.536081-6-tyhicks@linux.microsoft.com \
--to=tyhicks@linux.microsoft.com \
--cc=apais@linux.microsoft.com \
--cc=bcm-kernel-feedback-list@broadcom.com \
--cc=jarkko@kernel.org \
--cc=jens.wiklander@linaro.org \
--cc=jgg@ziepe.ca \
--cc=linux-integrity@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mips@vger.kernel.org \
--cc=op-tee@lists.trustedfirmware.org \
--cc=pasha.tatashin@soleen.com \
--cc=peterhuewe@gmx.de \
--cc=sumit.garg@linaro.org \
--cc=thiruan@microsoft.com \
--cc=vikas.gupta@broadcom.com \
--cc=zajec5@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).