linaro-kernel February 2012

linaro-kernel@lists.linaro.org

33 participants
26 discussions

[PATCH] staging: android/ram_console: Don't build on arches w/o ioremap

by Anton Vorontsov

This patch fixes UML build: CC drivers/staging/android/ram_console.o drivers/staging/android/ram_console.c: In function 'ram_console_driver_probe': drivers/staging/android/ram_console.c:358:2: error: implicit declaration of function 'ioremap' [-Werror=implicit-function-declaration] cc1: some warnings being treated as errors make[3]: *** [drivers/staging/android/ram_console.o] Error 1 Signed-off-by: Anton Vorontsov <anton.vorontsov(a)linaro.org> --- drivers/staging/android/Kconfig | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/drivers/staging/android/Kconfig b/drivers/staging/android/Kconfig index becf711..2054ccb 100644 --- a/drivers/staging/android/Kconfig +++ b/drivers/staging/android/Kconfig @@ -27,6 +27,7 @@ config ANDROID_LOGGER config ANDROID_RAM_CONSOLE bool "Android RAM buffer console" + depends on !S390 && !UML default n config ANDROID_RAM_CONSOLE_ENABLE_VERBOSE -- 1.7.7.6

12 years, 10 months

Sample big.LITTLE model boot images

by Dave Martin

Hi all, I've added some detailed info on the wiki about how to go about building bootable images for the big.LITTLE components, here: https://wiki.linaro.org/Internal/Projects/Big.Little.Switcher/ARMFastModels… For the benefit of anyone who can't see that page, I've also pasted it here -- if anyone knows a better place to post this stuff, please let me know! Note that although the instructions give details of how to build a filesystem image, there is essentially nothing b.L or model-specific there -- it just serves as background for explaining how to work around some issues which you may encounter. These images are not supposed to present a fully working big.LITTLE system -- they are there to help people understand how booting works, where the sources are and how to work with the model. Note also that the bootwrapper will change soon (when I get there) to support loading of the kernel, initramfs from the host filesystem using semihosting, just like the kvm bootwrapper, but this isn't implemented for now. Cheers ---Dave == Filesystem == We need to create an SD card image with a filesystem on it, with the rootfs partition matching the bootargs set previously. The following example generates a suitable image using developer. The hardware pack is largely irrelevant because we're not getting the kernel, modules, bootloader or command-line from there -- but it keeps l-m-c happy. {{{ $ wget http://releases.linaro.org/12.02/ubuntu/oneiric-images/developer/linaro-o-d… $ wget http://releases.linaro.org/12.02/ubuntu/oneiric-images/developer/hwpack_lin… }}} Note that the ARM fast model's MMC interface emulation is currently limited to 2G. Make the image a bit smaller than that to be on the safe side: {{{ $ sudo linaro-media-create --dev vexpress --image_file mmc.bin --image_size 2000M --hwpack hwpack_linaro-lt-vexpress-a9_20120221-1_armel_suupported.tar.gz --binary linaro-o-developer-tar-20120221-0.tar.gz }}} After generating the filesystem, you probably want to customize it: * Disable address layout randomization (mitigates a memory consumption issue with the model, but not so important on host machines with >4GB of RAM): {{{ echo sys.kernel.randomize_va_space = 0 >>etc/sysctl.conf }}} * Disable DHCP for the network (otherwise boot will stall): {{{ sed -i '/auto.*eth0/d; s/^$iface.*eth0.*$dhcp/\1manual/' etc/network/interfaces }}} * Edit fstab to put the real device name into /etc/fstab in place of UUID=<uuid>. This may not be necessary (mountall was getting confused, but that may have been caused by not having an initramfs). Finally, extract the initramfs image (whatever /initrd.img in the filesystem image points to). == Kernel, switcher and bootwrapper == Clone the big.LITTLE switcher: {{{ $ git clone --branch gnu-build git://git.linaro.org/people/dmart/arm-virt-bl.git }}} Clone the kernel to run on the model. (Eventually we shouldn't need a special tree for this. There are a few model-specific tweaks in this tree, but nothing big.LITTLE-specific yet.) {{{ $ git clone --branch arm/vexpressdt-rtsm git://git.linaro.org/people/dmart/linux-2.6-arm.git }}} Now build the kernel: {{{ $ cd linux-2.6-arm/ $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- vexpress_rtsm_defconfig $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- zImage dtbs }}} The bootwrapper doesn't support device tree yet, so for now append a suitable device tree blob to the zImage. This should match the model you intend to run on: {{{ $ cat arch/arm/boot/zImage arch/arm/boot/vexprress-v2p-ca15x4-rtsm.dtb >../zBlob }}} Now, build the bootwrapper using the kernel you just built: {{{ $ cd ../arm-virt-bl/bootwrapper }}} Configure some things: In Makefile, add the following argument to BOOTARGS: {{{ root=/dev/mmcblk0p2 }}} Due to current bugginess introduced by the ARM->GNU toolchain migration, the switcher is not currently stable. For now, we turn off autonomous asynchronous switching so that we can see the system booting: In big-little/Makefile, add change the line {{{ ASYNC ?= TRUE }}} to {{{ ASYNC ?= FALSE }}} Plug in the kernel and initramfs images from the previous steps: {{{ $ : >payload/fsimg $ cp ../../zBlob payload/kernel $ cp initrd.img payload/fsimg }}} ... and build: {{{ $ make [...] LD img.axf }}} img.axf is the boot payload which is needed to start the model. It contains the big.LITTLE switcher code and the kernel, along with a minimal bootloader. == Running == OK, so now we have: * A boot image containing the switcher and kernel: img.axf * A filesystem MMC card image: mmc.bin * A model binary Sample payload images can be found in http://people.linaro.org/~dmart/bl-images/model-images-20120228.tar.bz2 Run like this: {{{ $ ./RTSM_VE_Cortex-A15x4-A7x4 -C motherboard.mmc.p_mmc_file=mmc.bin -a coretile.cluster0.*=img.axf }}} This should be enough to boot to a prompt on the simulated UART. Beware though -- it can take up to 10 minutes or so to get there, depending on your machine.

12 years, 11 months

[Activity] (Omar Ramirez) Feb 6 - Feb 19

by Omar Ramirez Luna

== Omar Ramirez <omarrmz> == === Highlights === * Attended Linaro Connect from Feb 6 - 10 * Rebased iommu hwmod work onto Ohad's rpmsg-branch, created github tree for him to check on the changes. * Setting up OMAP3 ISP testing environment, to test iommu changes without a sensor, following instructions received from Laurent Pinchart. * Looking at device tree for mailbox. * Tidspbridge work: - Tracking inclusion of memory leak fixes for tidspbridge. - Patch to solve a L3 warning due to a missing wdt clock on the dsp side.

12 years, 11 months

[ACTIVITY] (Thomas Abraham) 2012-02-20 - 2012-01-24

by Thomas Abraham

== Thomas Abraham <thomas-ab> == === Highlights === * Posted revised device tree support patches for wakeup interrupts (v3), max8997 mfd/regulator (v4) and interrupt combiner (v4). Reworked the patches for the v5 of irq_domain generalization patches. === Plans === * Revised device tree support patches for display controller. * Generic bindings for IOMMU controller.

12 years, 11 months

[ACTIVITY] (Anton Vorontsov) 2012-02-22 - 2012-02-24

by Anton Vorontsov

Got ill at the start of this week, plus the holidays pretty much distracted my usual workflow. == Highlights == * Found a serious bug in the cgroups memory controller, prepared and send the fix upstream; * Got a drop-in userspace replacement for the kernel LMK driver, it is using cgroups memory notifications; * Started working on shm+liburcu-cds support for the userspace-LMK daemon, this will let Activity Manager and ulmk daemon efficiently exchange PIDs and their priorities, so that ulmk wouldn't need to traverse the whole /proc directory. -- Anton Vorontsov Email: cbouatmailru(a)gmail.com

12 years, 11 months

[ACTIVITY] (Shawn Guo) Week of Feb 20

by Shawn Guo

=== Device Tree === * Refine imx sound Kconfig and imx ASoC driver to get imx-pcm-dma work independently with imx-ssi, so that it's possible to get it work with fsl_ssi driver. * Factor out the common functions among Freescale PowerPC ASoC machine drivers into a utility module, so that these common bits do not need to get duplicated again when IMX machine driver is added to work with fsl_ssi driver. === IMX Maintenance === * Posted a few updates on imx_v6_v7_defconfig and imx5/6 dts * Tested a couple of ASoC dmaengine backed pcm driver consolidation patches on IMX and MXS * Collected a number of imx6 patches from Freescale Landing Team -- Regards, Shawn

12 years, 11 months

[ACTIVITY][weekly][linaro] (Dave Martin) 2012-02-20 - 2012-02-24

by Dave Martin

== Dave Martin <dmart> == === Activity Summary === * A bit of cleanup progress on the hyp-entry patches, but more is needed. * Addressed review comments on the hyp-entry patches locally (not reposted yet) * Progressed deployment of the ARM task migration (switcher) implementation: merged in ARM's recent fixes; still discussing on how best to publish this. Debugging still appears to be needed. * Specification/planning discussions for the big.LITTLE work after Linaro Connect. === Plans === * Continue debugging ARM switcher * Clean up and post hyp-entry RFC * Attempt to implement cpufreq backend to drive the ARM switcher from userspace === Work Items === https://blueprints.launchpad.net/linux-linaro/+spec/big-little-reference-sw…: [dave-martin-arm] integrate reference switcher bug fixes from ARM: INPROGRESS [dave-martin-arm] debug reference switcher: INPROGRESS (i.e., work on-going) === Absences === none planned yet

12 years, 11 months

[Activity] (Niklas Hernaeus) 2012-02-20 - 2012-02-24

by Niklas Hernaeus

== Niklas Hernaeus <nhe> == === General activity === * Made patches apply and build on both next-kernel and igloo-kernel * Made the discovery that my problems with running with DT on snowball seems to be due to a lockup in the boot. The speculation so far is that this is due to a different access of hw when using DT, where some boot sw accesses some hw that have not any clock or power yet. At the moment it seems to be the gpio that is the problem.

12 years, 11 months

[ACTIVITY] (Rajendra Nayak) Feb 14 - Feb 24

by Rajendra Nayak

== Rajendra Nayak <rnayak> == === Highlights === * Posted cleanups for twl4030-gpio and mmc dependencies during init since mmc card detect uses twl4030 gpio. * Posted v2 of the pdev->id cleanup for omap hsmmc driver. Asked Chris to pull for 3.4. * Posted v3 of twl regulator DT adaptation patches. Still got dependency with Benoit's i2c-twl series. * Posted omap hsmmc driver DT adaptation patches. Have dependency on the pdev->id cleanup and twl regulator DT series. === Plans === * Repost twl regulator DT patches on top of Tero's changes as requested by Mark. * twl4030-gpio DT conversion. * System control module driver for OMAP. === Misc === * None

12 years, 11 months

[ACTIVITY] (John Stultz) Feb 20-24

by john stultz

=== Highlights === * Finish writeup of android meeting summary got it reviewed and acked by the participants and sent to lwn. Hoping it will be published this weds. * Handled Android-subteam meeting * Finally got to testing Rafael's wakelock patches on an x86 system. Found an issue and reported it. Worked on getting suspend/resume working on my panda board so I can test there, but so far no luck. * Reviewed the released Android 3.3 tree from Google. Its much smaller, which is great. Also they are using my alarm-timer cleanups, which might help get those ready for mainline inclusion. We should note that the release is really just a development snapshot, so its likey to change a bit. * Sent some email to Colin Cross about cgroup patches that I thought he was going to drop, but he explained why they were still necessary. * Met with Mark Gross of Intel (also a Portlander) who's name came up during the Android meeting with regards to runtime pm vs wakelocks. Talked to him a bit about his thoughts on wakelocks and talked about what went on at the Android meeting. * Started looking at what is required to get ADB into staging === Plans === * Continue working on testing Rafael's wakelocks & try to integrate them with the alarmtimer work * Get some time to work on another iteration of fadvise volatile === Issues === * NA

12 years, 11 months

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linaro-kernel February 2012