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| author | Alistair Delva <adelva@google.com> | 2021-02-15 12:43:29 -0800 |
|---|---|---|
| committer | Alistair Delva <adelva@google.com> | 2021-02-15 12:44:34 -0800 |
| commit | faa476c0caaa598afa5a6109d17102db5fe35ec6 (patch) | |
| tree | 37a21c69306801ee7cdda5167a30896c8740155b /docs/components/debugfs-design.rst | |
| parent | b00a71fc312c9781fa6f404dccfb55b062b2ccac (diff) | |
| parent | 66306814586b1bf6bcb859aaad218ec3bb090e94 (diff) | |
| download | platform_external_arm-trusted-firmware-faa476c0caaa598afa5a6109d17102db5fe35ec6.tar.gz platform_external_arm-trusted-firmware-faa476c0caaa598afa5a6109d17102db5fe35ec6.tar.bz2 platform_external_arm-trusted-firmware-faa476c0caaa598afa5a6109d17102db5fe35ec6.zip | |
Merge branch 'aosp/upstream-master' into HEADandroid-s-preview-1
This keeps the bl31 interface change reverted which still has not been
fixed in upstream U-Boot for rockchip devices.
Test: CROSS_COMPILE=aarch64-linux-gnu- make PLAT=rk3399 \
DEBUG=0 ERROR_DEPRECATED=1 bl31
Signed-off-by: Alistair Delva <adelva@google.com>
Change-Id: I7c3972a7b767715efb05593096d5d92dba14c609
Diffstat (limited to 'docs/components/debugfs-design.rst')
| -rw-r--r-- | docs/components/debugfs-design.rst | 25 |
1 files changed, 9 insertions, 16 deletions
diff --git a/docs/components/debugfs-design.rst b/docs/components/debugfs-design.rst index 06916f3d9..253651513 100644 --- a/docs/components/debugfs-design.rst +++ b/docs/components/debugfs-design.rst @@ -15,8 +15,9 @@ Virtual filesystem ------------------ The core functionality lies in a virtual file system based on a 9p file server -interface (`Notes on the Plan 9 Kernel Source`_). The implementation permits -exposing virtual files, firmware drivers, and file blobs. +interface (`Notes on the Plan 9 Kernel Source`_ and +`Linux 9p remote filesystem protocol`_). +The implementation permits exposing virtual files, firmware drivers, and file blobs. Namespace ~~~~~~~~~ @@ -77,10 +78,10 @@ SMC interface ------------- The communication with the 9p layer in BL31 is made through an SMC conduit -(`SMC Calling Convention PDD`_), using a specific SiP Function Id. An NS shared -buffer is used to pass path string parameters, or e.g. to exchange data on a -read operation. Refer to `ARM SiP Services`_ for a description of the SMC -interface. +(`SMC Calling Convention`_), using a specific SiP Function Id. An NS +shared buffer is used to pass path string parameters, or e.g. to exchange +data on a read operation. Refer to :ref:`ARM SiP Services <arm sip services>` +for a description of the SMC interface. Security considerations ----------------------- @@ -114,19 +115,11 @@ The SMC interface is accessible from an NS environment, that is: - a Linux kernel driver running at NS-EL1 - a Linux userspace application through the kernel driver -References ----------- - -.. [#] `SMC Calling Convention PDD`_ -.. [#] `Notes on the Plan 9 Kernel Source`_ -.. [#] `Linux 9p remote filesystem protocol`_ -.. [#] `ARM SiP Services`_ - -------------- -*Copyright (c) 2019, Arm Limited and Contributors. All rights reserved.* +*Copyright (c) 2019-2020, Arm Limited and Contributors. All rights reserved.* -.. _SMC Calling Convention PDD: http://infocenter.arm.com/help/topic/com.arm.doc.den0028b/ +.. _SMC Calling Convention: https://developer.arm.com/docs/den0028/latest .. _Notes on the Plan 9 Kernel Source: http://lsub.org/who/nemo/9.pdf .. _Linux 9p remote filesystem protocol: https://www.kernel.org/doc/Documentation/filesystems/9p.txt .. _ARM SiP Services: arm-sip-service.rst |