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Re: [PATCH v2 1/8] driver core: make deferring probe after init optional

by Frank Rowand

On 05/24/18 11:18, Mark Brown wrote: > On Thu, May 24, 2018 at 12:50:17PM -0500, Rob Herring wrote: > >> Subsystems or drivers may opt-in to this behavior by calling >> driver_deferred_probe_check_init_done() instead of just returning >> -EPROBE_DEFER. They may use additional information from DT or kernel's >> config to decide whether to continue to defer probe or not. > > Should userspace have some involvement in this decision? It knows if > it's got any intention of loading modules for example. Kernel config > checks might be good enough, though it's going to be a pain to work out > if the relevant driver is built as a module for example. > A parallel issue is that loading an overlay could provide the resource that will allow the deferred probe to complete. (That is, once we finish implementing the run time overlays feature.) -Frank

7 years, 1 month

[PATCH v2 0/8] Make deferring probe forever optional

by Rob Herring

This series came out of a discussion on the ARM boot-architecture list[1] about DT forwards and backwards compatibility issues. There are issues with newer DTs breaking on older, stable kernels. Some of these are difficult to solve, but cases of optional devices not having kernel support should be solvable. I tested this on a RPi3 B with the pinctrl driver forced off. With this change, the MMC/SD and UART drivers can function without the pinctrl driver. v2: - Add a DT property for pinctrl to flag using defaults - Add a debug timeout to stop deferring some number of seconds after initcalls are done (giving modules a chance to load) - Split pinctrl support to its own patch - WARN when we stop deferring probe for a device - Add IOMMU support - Add PM domain support Rob [1] https://lists.linaro.org/pipermail/boot-architecture/2018-April/000466.html Rob Herring (8): driver core: make deferring probe after init optional driver core: add a deferred probe timeout dt-bindings: pinctrl: add a 'pinctrl-use-default' property arm: dts: bcm283x: mark the UART pin muxing nodes with pinctrl-use-default pinctrl: optionally stop deferring probe at end of initcalls iommu: Stop deferring probe at end of initcalls iommu: Remove IOMMU_OF_DECLARE PM / Domains: Stop deferring probe at the end of initcall .../admin-guide/kernel-parameters.txt | 7 +++ .../bindings/pinctrl/pinctrl-bindings.txt | 6 +++ arch/arm/boot/dts/bcm283x.dtsi | 2 + drivers/base/dd.c | 43 +++++++++++++++++++ drivers/base/power/domain.c | 2 +- drivers/iommu/arm-smmu-v3.c | 2 - drivers/iommu/arm-smmu.c | 7 --- drivers/iommu/exynos-iommu.c | 2 - drivers/iommu/ipmmu-vmsa.c | 3 -- drivers/iommu/msm_iommu.c | 2 - drivers/iommu/of_iommu.c | 21 +-------- drivers/iommu/qcom_iommu.c | 2 - drivers/iommu/rockchip-iommu.c | 2 - drivers/pinctrl/devicetree.c | 14 ++++-- include/linux/device.h | 2 + include/linux/of_iommu.h | 4 -- 16 files changed, 73 insertions(+), 48 deletions(-) -- 2.17.0

7 years, 1 month

Re: [PATCH v2 1/8] driver core: make deferring probe after init optional

by Robin Murphy

On 24/05/18 19:18, Mark Brown wrote: > On Thu, May 24, 2018 at 12:50:17PM -0500, Rob Herring wrote: > >> Subsystems or drivers may opt-in to this behavior by calling >> driver_deferred_probe_check_init_done() instead of just returning >> -EPROBE_DEFER. They may use additional information from DT or kernel's >> config to decide whether to continue to defer probe or not. > > Should userspace have some involvement in this decision? It knows if > it's got any intention of loading modules for example. Kernel config > checks might be good enough, though it's going to be a pain to work out > if the relevant driver is built as a module for example. Arguably userspace has some control over that already, as in many cases it can just unbind and reprobe the consumer driver after loading the provider driver (in my silly IOMMU-drivers-as-modules PoC a while ago I was delighted to find that it can really be that simple). It's a bit harder when the device is the primary console or root filesystem, but I think that's effectively just another variant of the "defer until a module is loaded" chicken-and-egg problem. Robin.

7 years, 1 month

Re: [PATCH v2 1/8] driver core: make deferring probe after init optional

by Rob Herring

On Thu, May 24, 2018 at 1:18 PM, Mark Brown <broonie(a)kernel.org> wrote: > On Thu, May 24, 2018 at 12:50:17PM -0500, Rob Herring wrote: > >> Subsystems or drivers may opt-in to this behavior by calling >> driver_deferred_probe_check_init_done() instead of just returning >> -EPROBE_DEFER. They may use additional information from DT or kernel's >> config to decide whether to continue to defer probe or not. > > Should userspace have some involvement in this decision? It knows if > it's got any intention of loading modules for example. Kernel config > checks might be good enough, though it's going to be a pain to work out > if the relevant driver is built as a module for example. I looked into whether we could hook into uevents in some way. If we knew when all the coldplug events had been handled, that would be sufficient. But it doesn't look to me like we can tell when that happens with the uevent netlink socket. I think about the only thing we can tell is if userspace has opened a socket. I'm not all that familiar with how the whole sequence works, so other opinions on this would be helpful. Also, for this to work with serial consoles, we have to make the decision before we get to userspace. I couldn't get systemd to create serial gettys either if we deferred later. There's some dependence on /dev/console, but I didn't get to the bottom of it. Rob

7 years, 1 month

[PATCH] README: Install dependencies on Fedora

by Daniel Thompson

Currently the README does not document how to install sphinx and texlive on Fedora. Fix this. Signed-off-by: Daniel Thompson <daniel.thompson(a)linaro.org> --- README.rst | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/README.rst b/README.rst index 851c078065a9..9eef58805021 100644 --- a/README.rst +++ b/README.rst @@ -49,6 +49,19 @@ new version can be installed with the Python package installer:: Export SPHINXBUILD (see above) if Sphinx was installed with pip --user, then follow Make commands below +On Fedora +^^^^^^^^^ + +:: + + # dnf install python2-sphinx texlive texlive-capt-of texlive-draftwatermark \ + texlive-fncychap texlive-framed texlive-needspace \ + texlive-tabulary texlive-titlesec texlive-upquote \ + texlive-wrapfig + +It is also possible to use python3-sphinx; this requires +SPHIXBUILD=sphinx-build-3 to be passed on the Make command line. + On Mac OS X ^^^^^^^^^^^ -- 2.17.0

7 years, 1 month

Re: [Arm.ebbr-discuss] [PATCH 1/2] Add revision history table

by Grant Likely

On 24/05/2018 14:33, Daniel Thompson wrote: > On Tue, May 22, 2018 at 05:14:00PM +0100, Grant Likely wrote: >> Adds the revision history table to the markup. >> >> Resolves: #4 >> Signed-off-by: Grant Likely <grant.likely(a)arm.com> >> --- >> source/ebbr.rst | 13 +++++++++++++ >> 1 file changed, 13 insertions(+) >> >> diff --git a/source/ebbr.rst b/source/ebbr.rst >> index 4100b2f..b6e48d6 100644 >> --- a/source/ebbr.rst >> +++ b/source/ebbr.rst >> @@ -18,6 +18,19 @@ Creative Commons, PO Box 1866, Mountain View, CA 94042, USA. >> :alt: Creative Commons License >> :align: right >> >> +.. tabularcolumns:: l c p{11.5cm} >> +.. table:: Revision History >> + >> + ================= ===== ============================================= >> + Date Issue Changes >> + ================= ===== ============================================= >> + 20 September 2018 B Confidentiality Change, EBBR version 0.51 >> + TBD TBD - Relicense to CC-BY-SA 4.0 >> + - Added Devicetree requirements >> + - Added Multiprocessor boot requirements >> + - Transitioned to reStructuredText and GitHub >> + ================= ===== ============================================= > > Is this going to be hand curated (e.g. patches that fail to update > changelog properly get caught during review) or will it be derived > post-hoc from the git history? Hand curated until someone writes a script to scrape commit lines. I don't think this table needs to be exhaustive though. Just the big picture items. Anyone who really cares can read the changebar version, or even just the git history. g. > > > Daniel. > IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.

7 years, 1 month

[PATCH 1/2] Add revision history table

by Grant Likely

Adds the revision history table to the markup. Resolves: #4 Signed-off-by: Grant Likely <grant.likely(a)arm.com> --- source/ebbr.rst | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/source/ebbr.rst b/source/ebbr.rst index 4100b2f..b6e48d6 100644 --- a/source/ebbr.rst +++ b/source/ebbr.rst @@ -18,6 +18,19 @@ Creative Commons, PO Box 1866, Mountain View, CA 94042, USA. :alt: Creative Commons License :align: right +.. tabularcolumns:: l c p{11.5cm} +.. table:: Revision History + + ================= ===== ============================================= + Date Issue Changes + ================= ===== ============================================= + 20 September 2018 B Confidentiality Change, EBBR version 0.51 + TBD TBD - Relicense to CC-BY-SA 4.0 + - Added Devicetree requirements + - Added Multiprocessor boot requirements + - Transitioned to reStructuredText and GitHub + ================= ===== ============================================= + ******************* About This Document ******************* -- 2.13.0

7 years, 1 month

[PATCH] Issue#10 Add EBBR compliance test

by Udit Kumar

This patch adds a appendix for EBBR compliance test. Signed-off-by: Udit Kumar <udit.kumar(a)nxp.com> --- source/ebbr.rst | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/source/ebbr.rst b/source/ebbr.rst index 40f03f1..880f126 100644 --- a/source/ebbr.rst +++ b/source/ebbr.rst @@ -557,6 +557,22 @@ Service UEFI § EFI_ISCSI_INITIATOR_NAME_PROTOCOL 16.2 ========================================== ====== +******************************************* +APPENDIX E - EBBR Compliance Tests +******************************************* + +UEFI Self Certification Tests (SCT) test the UEFI implementation. +EBBR is leveraging from UEFI, UEFI SCT test suites check for compliance +against the EBBR specification. +To build UEFI SCT, please refer https://github.com/UEFI/UEFI-SCT + +EBBR is very flexible and many features are platform dependent. +Therefore platform owner can decide, to implement and test optional features +with UEFI SCT. + + + + .. note:: Support for iSCSI is only required on machines that lack persistent storage, such as a, HDD. This configuration is intended for thin clients and compute-only nodes -- 1.9.1

7 years, 1 month

[PATCH] Trivial: Fix glossary entrys

by Grant Likely

Some of the glossary terms got split across lines which put half the term in the description instead of the entry name. Fix the 'AArch64 State' and 'EFI Loaded Image' entries. Signed-off-by: Grant Likely <grant.likely(a)arm.com> --- source/ebbr.rst | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/source/ebbr.rst b/source/ebbr.rst index 4269b49..9e787ed 100644 --- a/source/ebbr.rst +++ b/source/ebbr.rst @@ -77,16 +77,16 @@ This document uses the following terms and abbreviations. The 64-bit ARM instruction set used in AArch64 state. All A64 instructions are 32 bits. - AArch64 - state The ARM 64-bit Execution state that uses 64-bit general purpose + AArch64 state + The ARM 64-bit Execution state that uses 64-bit general purpose registers, and a 64-bit program counter (PC), Stack Pointer (SP), and exception link registers (ELR). AArch64 Execution state provides a single instruction set, A64. - EFI - Loaded Image An executable image to be run under the UEFI environment, + EFI Loaded Image + An executable image to be run under the UEFI environment, and which uses boot time services. EL0 -- 2.13.0

7 years, 1 month

EBBR Weekly - Notes 17 May 2018

by Grant Likely

https://github.com/ARM-software/ebbr/wiki/EBBR-Notes-2018.05.17 # 17 May 2018 ## Attendees * Alex Graf (SUSE) * Ryan Harkin (Linaro) * Rob Herring (Linaro) * Udit Kumar (NXP) * Grant Likely (Arm) * Bill Mills (TI) * Tom Rini (Konsulko) * Daniel Thompson (Linaro) ## Agenda * Issue/Action review * Any other business ## Notes ### Issue/Action review * Issue #1 - Bill will assign to himself * Issue #2 - Leif on Holiday * Issue #3 - Daniel will take * Issue #4 - grant to take * Issue #8 - partitioning tool rules - Daniel will take * Issue #10 & 11 - Assign to Udit * Issue #10 - Document how to certify * Dong added that we can probably leverage UEFI SCT * Issue #13 - Daniel to take ### Other Business Rob: Looks like there is interest from the Google/Android folks in EBBR * Rob to set up a meeting with the relevant folks IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.

7 years, 1 month

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