linaro-dev May 2016

linaro-dev@lists.linaro.org

16 participants
16 discussions

by Marcin Juszkiewicz

Recently my angry post on Google+ [1] got so many comments that it was clear that it would be better to move to some mailing list with discussion. As it is about boot loaders and Linaro has engineers from most of SoC vendor companies I thought that this will be best one. 1. https://plus.google.com/u/0/+MarcinJuszkiewicz/posts/J79qhndV6FY All started when I got Pine64 board (based on Allwinner A64 SoC) and had same issue as on several boards in past - boot loader written in some random place on SD card. Days where people used Texas Instruments SoC chips were great - in-cpu boot loader knew how to read MBR partition table and was able to load 1st stage boot loader (called MLO) from it as long it was FAT filesystem. GPU used by Raspberry/Pi is able to read MBR, finds 1st partition and reads firmware files from there as long it is FAT. Chromebooks have some SPI flash to keep boot loaders and use GPT partitioning to find where from load kernel (or another boot loader). And then we have all those boards where vendors decided that SPI flash for boot loader is too expensive so it will be read from SD card instead. From any random place of course... Then we have distributions. And instead of generating bunch of images per board they want to make one clean image which will be able to handle as much as possible. If there are UEFI machines on a list of supported ones then GPT partitioning will be used, boot loader will be stored in "EFI system area" and it boots. This is how AArch64 SBSA/SBBR machines work. But there are also all those U-Boot (or fastboot/redboot/whateverboot) ones. They are usually handled by taking image from previous stage and adding boot loader(s) by separate script. And this is where "fun" starts... GPT takes first 17KB of storage media as it allow to store information about 128 partitions. Sure, no one is using so many on such devices but still space is reserved. But most of chips expects boot loader(s) to be stored: - right after MBR - from 1KB - from 8KB - any other random place So scripts start to be sets of magic written to handle all those SoCs... Solution for existing SoCs is usually adding 1MB of SPI flash during design phase of device and store boot loader(s) there. But it is so expensive someone would say when it is in 10-30 cents range... Even 96boards CE specification totally ignored that fact while it could be a way of showing how to make popular board. Instead it became yet-another-board-to-laugh (EE spec did not improve much). Is there a way to get it improved? At least for new designs?

8 years, 7 months

Re: Let's talk about boot loaders

by Martin Stadtler

+1 On 5 May 2016 at 20:08, Bill Gatliff <bgat(a)billgatliff.com> wrote: > > > On Thu, May 5, 2016 at 11:50 AM Martin Stadtler < > martin.stadtler(a)linaro.org> wrote: > >> I would add, that you need to draw a line in the sand between the >> 'consumer' (don't flame me, I am just struggling to find a better term) >> boards and those that are positioned for production/enterprise. >> > > One way to draw the line is whether the board is delivered to be used > as-is, vs. with the expectation of further development activities that will > change the work product that shipped with the board. > > In the first case, all you care is that it works when it leaves the dock. > In the latter case, you care more that it can't be easily broken later. > > That's a pretty big difference in my experience. > > b.g. > -- > > Bill Gatliff > Embedded Linux training and consulting > bgat(a)billgatliff.com > (309) 453-3421 > -- Martin Stadtler Director, Enterprise Group Linaro Ltd mobile: +44.7492180779 IRC: martinst@#linaro on irc.freenode.ne <http://irc.freenode.net/>t

8 years, 7 months

[PATCH PM-QA] Fixed array initializations to calculate freq deviation.

by Saul Romero

Changes in cpufreq_06.sh to calculate summatory and average of frequency measurements. Signed-off-by: Saul Romero <saul.romero(a)linaro.org> --- cpufreq/cpufreq_06.sh | 19 ++++++------------- 1 file changed, 6 insertions(+), 13 deletions(-) diff --git a/cpufreq/cpufreq_06.sh b/cpufreq/cpufreq_06.sh index b323dc8..a25bbd2 100755 --- a/cpufreq/cpufreq_06.sh +++ b/cpufreq/cpufreq_06.sh @@ -31,7 +31,7 @@ CPUCYCLE=../utils/cpucycle freq_results_array="results" compute_freq_ratio() { - index=0 + #index=0 cpu=$1 freq=$2 @@ -49,25 +49,21 @@ compute_freq_ratio() { } compute_freq_ratio_sum() { - index=0 - sum=0 + #index=0 + #sum=0 res=$(eval echo \$$freq_results_array$index) sum=$(echo $sum $res | awk '{ printf "%f", $1 + $2 }') index=$((index + 1)) - } __check_freq_deviation() { res=$(eval echo \$$freq_results_array$index) - if [ ! -z "$res" ]; then # compute deviation dev=$(echo $res $avg | awk '{printf "%.3f", (($1 - $2) / $2) * 100}') - # change to absolute dev=$(echo $dev | awk '{ print ($1 >= 0) ? $1 : 0 - $1}') - index=$((index + 1)) res=$(echo $dev | awk '{printf "%f", ($dev > 5.0)}') @@ -85,23 +81,20 @@ check_freq_deviation() { cpu=$1 freq=$2 - check "deviation for frequency $(frequnit $freq)" __check_freq_deviation - } check_deviation() { cpu=$1 - set_governor $cpu userspace - + index=0 for_each_frequency $cpu compute_freq_ratio - + index=0;sum=0 for_each_frequency $cpu compute_freq_ratio_sum avg=$(echo $sum $index | awk '{ printf "%.3f", $1 / $2}') - + index=0 for_each_frequency $cpu check_freq_deviation } -- 2.5.0 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.

8 years, 7 months

[PATCH PM-QA] Fixed array initializations to calculate freq deviation.

by Saul Romero

--- cpufreq/cpufreq_06.sh | 19 ++++++------------- 1 file changed, 6 insertions(+), 13 deletions(-) diff --git a/cpufreq/cpufreq_06.sh b/cpufreq/cpufreq_06.sh index b323dc8..a25bbd2 100755 --- a/cpufreq/cpufreq_06.sh +++ b/cpufreq/cpufreq_06.sh @@ -31,7 +31,7 @@ CPUCYCLE=../utils/cpucycle freq_results_array="results" compute_freq_ratio() { - index=0 + #index=0 cpu=$1 freq=$2 @@ -49,25 +49,21 @@ compute_freq_ratio() { } compute_freq_ratio_sum() { - index=0 - sum=0 + #index=0 + #sum=0 res=$(eval echo \$$freq_results_array$index) sum=$(echo $sum $res | awk '{ printf "%f", $1 + $2 }') index=$((index + 1)) - } __check_freq_deviation() { res=$(eval echo \$$freq_results_array$index) - if [ ! -z "$res" ]; then # compute deviation dev=$(echo $res $avg | awk '{printf "%.3f", (($1 - $2) / $2) * 100}') - # change to absolute dev=$(echo $dev | awk '{ print ($1 >= 0) ? $1 : 0 - $1}') - index=$((index + 1)) res=$(echo $dev | awk '{printf "%f", ($dev > 5.0)}') @@ -85,23 +81,20 @@ check_freq_deviation() { cpu=$1 freq=$2 - check "deviation for frequency $(frequnit $freq)" __check_freq_deviation - } check_deviation() { cpu=$1 - set_governor $cpu userspace - + index=0 for_each_frequency $cpu compute_freq_ratio - + index=0;sum=0 for_each_frequency $cpu compute_freq_ratio_sum avg=$(echo $sum $index | awk '{ printf "%.3f", $1 / $2}') - + index=0 for_each_frequency $cpu check_freq_deviation } -- 2.5.0 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.

8 years, 7 months

[IMPORTANT] Regression after android-review.linaro.org upgrade to Gerrit 2.12.2

by Paul Sokolovsky

Hello, Summary: Your SSH username on https://android-review.linaro.org will now match Linaro username (first.last) after the next login. You local repository clones need to be updated for new username. Detailed description: https://android-review.linaro.org was the first Gerrit server in Linaro, when there were no central LDAP user database yet. As a result, there were free-form SSH usernames used, instead of the later standard first.last as used on all the other Gerrit servers. This inconsistency was a subject of background concern for Systems team, but of course not something having enough priority to "fix". However, Gerrit 2.12.2 upgrade started tonight uncovered following issue: Gerrit tries to synchronize its SSH username setting with LDAP, and fails, as Gerrits own rules disallow changing of username. The symptom of this is error "Authentication temporary unavailable" when a user with "old" SSH username tries to login via browser. While this can be classified as a Gerrit bug (and previous versions were smart enough), we'll unlikely find any timely solution to keep things as they are. So, it makes sense to take a chance of cleaning up username and making this server follow standard username conventions. Consequently: 1. All usernames which don't match "first.last" pattern are reset. 2. If you are affected, you won't be able to perform SSH operations (like git clone/push) until you login via web interface. 3. On the next login via web interface, it will be set to LDAP's "first.last" value. 4. You will need to update remotes of your existing git clones to new username (or alternatively, re-clone). 5. If you already use "first.last" SSH username, you're unaffected. The list of users affected is given below. While it seems long, majority of enrties there are for people no longer at Linaro, or for community accounts (which didn't work since we switched to LDAP anyway). If you need further assistance, please open a ticket at https://servicedesk.linaro.org/servicedesk/customer/portal/4 . Thanks, Paul username:Ng username:pfefferz username:asac username:james_w username:fgiff username:jserv username:mabac username:deeptik username:cyang username:mpoirier username:ndec username:mwaddel username:mansson username:Sachin username:vishalbhoj username:suapapa username:fabo username:pabhishek username:cnxsoft username:amitdanielk username:patrikryd username:sangwook username:ericm username:pundiramit username:glandium username:eazyigz username:tixy username:danilo username:john username:nytowl username:tony_tu username:Sangwook username:StefanEkenberg username:uichi username:plars username:zyga username:ruppi username:ebenpor username:jhkim username:Annamalai username:markoncomputer username:Claude username:tianhongwang username:rchand00 username:omarrmz username:aviksil username:nvl1109 username:a0132810 username:pelya username:krtaylor username:developer4563 username:yusufbu username:dzinman username:arussello username:mdupuy username:williamcharles username:aorth username:lanaczko username:rmcc username:kcrudup username:kelvin username:angelsl username:unixmanlinuxboy username:Quiter username:sourxsunny username:pbeeler username:anmar username:wucongdonglai username:bambi username:rperier username:sgt username:roalex username:vishveshwarbhat username:therbom username:rajagopalvenkat username:winner00 username:ramesh username:abelloni username:sparksco username:fahadkdi username:ryanharkin username:axelfagerstedt username:nocoast username:milo username:fcarpenter username:hongbozhang username:fahadk username:pelya2 username:janjic username:dpervushin username:qoowater username:cerial username:tinojantony username:stephaneeee username:kishoreboddu username:nuclearmistake username:SanjasdfsafsffaySinghsdfasfRawat username:donvigo username:tinojgit username:afarah username:mechmetal username:akbennett username:c username:sikuner username:wasungkim username:stevanr username:deqiang username:anilkumar username:willnewton username:codeart username:lrabiet username:Bintian username:bintian username:vishalbhoj2 username:tusharbehera username:jbergsag username:tgall username:amitkhare username:neo username:paramanands username:sumit username:danielt username:help username:XavierHsu username:Serban username:Z username:koenkooi (127 rows) -- Best Regards, Paul Linaro.org | Open source software for ARM SoCs Follow Linaro: http://www.facebook.com/pages/Linaro http://twitter.com/#!/linaroorg - http://www.linaro.org/linaro-blog

8 years, 7 months

Developer Reference Platform 16.03 differences compared to Debian

by Riku Voipio

One of the goals of RPB is to follow that our changes go back upstream. For the next RPB release, a more polished report is planned. But to get things started, here's a sample - and to use as baseline to compare progress for the 16.06 release. The list of packages is collected from db410/alip image with distrodelta script[1]. This lists the packages that do not become from Debian (Jessie release) or Debian backports: New packages not in Debian: 96boards-artwork: 0.6-0linaro1 96boards-tools: 0.5 optee-client: 1.0.1+git5+g89f25ce-1.linarojessie.1 glshim: 0.41+git20150911.42a7739-0.linarojessie.1 linaro-artwork: 0.6-0linaro1 linaro-default-settings: 0.3-0linaro1 linaro-overlay: 1112.8 wcnss-config: 1.8 Changed packages: alsa-lib: 1.0.28-1+linaro1.linarojessie.1 * add UCM config file for HDMI and HiFi on DB410c * add UCM config file for HDMI on IFC6410 chromium-browser: 47.0.2526.16-1.6.linarojessie.1 * seccomp and namespace fixes * patches to compile on arm64/armhf firmware-nonfree: 20160110-1.linarojessie.1 * ti-connectivity (updates for HiKey): - Include wl18xx-fw-4 firmware - Add TIInit_11.8.32.bts for bluetooth support isc-dhcp: 4.3.3-8~linaro1 * Reverting requirement for debhelper >= 9.20151220 * Upload to make it work with latest systemd: - https://bugs.96boards.org/show_bug.cgi?id=271 linux: 4.4.0.linaro.104-1.linarojessie.1 * See kernel changes report (TBD) No-changes Backports: apparmor: 2.10-2.linarojessie.1 binutils: 2.25.90.20160101-1.linarojessie.1 gdb: 7.10-1.linarojessie.1 gyp: 0.1+20150913git1f374df9-1.linarojessie.1 java-common: 2:1.8-53.linarojessie.1 nodejs: 4.2.2~dfsg-1.1.linarojessie.1 openssl: 1.0.2d-1.linarojessie.1 systemd: 228-2.4.linarojessie.3 sysvinit: 2.88dsf-59.2.linarojessie.1 util-linux: 2.27.1-1.linarojessie.1 x265: 1.7-4~bpo8+1.linarojessie.1 xorg: 1:7.7+11.linarojessie.1 xorg-server: 2:1.17.3-2.linarojessie.2 xserver-xorg-video-fbdev: 1:0.4.4-1.linarojessie.1 xserver-xorg-video-freedreno: 1.4.0-1.linarojessie.1 [1] https://github.com/suihkulokki/distrodelta with command distrodelta -o Debian 'Debian Backports'

8 years, 7 months

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linaro-dev May 2016