linaro-dev December 2010

linaro-dev@lists.linaro.org

84 participants
75 discussions

by Ken Werner

Hi there, Does anyone know if it's possible to use kdump on an ARM board to capture a memory image of the kernel (to be later analyzed with crash for example)? I had a quick look at the kernel config options provided by the linaro-linux tree and it seems that kexec support (CONFIG_KEXEC) is there. I assume /sbin/kexec could be used to load a dump-capture kernel. Unfortunately CONFIG_CRASH_DUMP is not available, so I don't know how to configure such a kernel. Any pointers or suggestions are appreciated. Regards Ken

15 years

Linaro Infrastructure Team Weekly Report (2010-12-03 to 2010-12-09)

by Ian Smith

All, The weekly report for the Linaro Infrastructure team may be found at:- Status report: https://wiki.linaro.org/Platform/Infrastructure/Status/2010-12-09 Burndown chart: This link is awaiting the production of new burndown charts. The Infrastructure related blueprints from the maverick cycle, of which currently there are 4 active ones (4 from the last report), are showing that there are 8 work items in progress (8 last report), and 11 work items to undertake (11 last report). These are to be moved into the natty cycle if still required. * arm-m-validation-dashboard; no change in status from last report; 3 in progress; 7 to do * arm-m-image-building-console; no change in status from last report; 3 in progress; 3 to do * arm-m-automated-testing-framework; no change in status from last report; 1 in progress; 0 to do * arm-m-testsuites-and-profilers; no change in status from last report; 1 in progress; 1 to do In the natty cycle, the following lists the current active Blueprints, or Blueprints planned and not started. Currently there are 4 active Blueprints (4 from the last report), which are showing that there are 8 work items in progress (7 last report), 41 work items to undertake (46 last report), 2 work items postponed (0 last report) and 8 work items added (all items added last report). * other-linaro-n-improve-linaro-media-create: 5 work items completed (2 last week); 4 work items in progress (3 last week); 8 work items to do (8 last week); 2 work items added this week (2 last week). * other-linaro-n-test-result-display-in-launch-control: 0 work items completed (8 last week); 1 work item in progress (1 last week); 10 work items to do (10 last week); 0 work items added (4 last week) * other-linaro-n-patch-tracking: 0 work item completed (0 last week); 2 work items in progress (2 last week); 9 work items to do (9 last week) * other-linaro-n-image-building: 2 work items in progress (2 last week); 5 work items to do (5 last week); 2 work items postponed (2 last week); 0 work items added (2 last week) * other-linaro-n-continuous-integration: Not started - awaiting a Hudson build server (RT#42278). * other-linaro-n-package-development-tools: Not Started; 9 work items to do Specifics accomplished this week include:- * other-linaro-n-image-building: "4.6 Multiple hwpacks": basically done - needing test and review. * ImproveLinaroMediaCreate: completed the ports to Python of "populate_boot" and "create_partitions" - waiting for review on "create partitions" * Added blueprint/bug links to the LaunchPad API. This is now landed and tested. * Also finished porting the work items tracker to use the launchpad APIPlease let me know if you have any comments or questions. Kind Regards, Ian

15 years

Linaro Foundations Team Weekly Report (2010-12-02 to 2010-12-08)

by Steve Langasek

The weekly report for the Linaro Foundations team may be found at: Status report: https://wiki.linaro.org/Platform/Foundations/2010-12-08 Overall status (out of date until workitem tracker for 11.05 is available): https://wiki.linaro.org/Platform/Foundations/Status * A first 2.6.37 kernel is now packaged and available in Ubuntu natty for inclusion in Linaro images. * Cross-compiler packages have been merged and uploaded to natty, preparing us for gcc 4.5 as a default cross-compiler. * Progress on ALIP continues, with all but two of the original ALIP packages now successfully cross-buildable with patches applied. Actions: * npitre to write up more formal documentation of what our kernel tree is (and isn't): DONE * slangasek to review armel-cross-toolchain-base merge request: DONE -- Steve Langasek Give me a lever long enough and a Free OS Debian Developer to set it on, and I can move the world. Ubuntu Developer http://www.debian.org/ slangasek(a)ubuntu.com vorlon(a)debian.org

15 years

Ftrace on the CA9x4 vexpress

by Ken Werner

Hi, I did some quick ftrace tests using the linaro-vexpress 2.6.35-1010.17 kernel on an ARM-Versatile Express CA9x4 board. It seems to work pretty good. I noticed only one issue with the wakeup latency tracer where /sys/kernel/debug/tracing/trace doesn't show any real information but the /sys/kernel/debug/tracing/trace_pipe does. The details can be found at: https://wiki.linaro.org/KenWerner/Sandbox/ftrace Regards Ken

15 years

Minutes & actions: Kernel Working Group meeting of Dec 6, 2010

by Mounir Bsaibes

Greetings, Enclosed you'll find a link to the agenda, minutes and actions from the Linaro kernel working group weekly meeting of Dec 06, 2010. https://wiki.linaro.org/WorkingGroups/KernelConsolidation/Meetings/2010-12-…<https://wiki.linaro.org/WorkingGroups/KernelConsolidation/Meetings/2010-11-…> == Summary == * Dave Martin & Nico reviewed K2.x blueprints, bp's are Approved now. * Tool to measure and fix SD card performance. Found a case of excessive copy-and-paste, gaining unneeded abstraction layers not yet needed for this non-ARM Unicore architecture. * Mainlined Flash support, available in git.stericsson.org, also taken into the linux-arm-kernel tree 2.6.37. * Implemented USB transceiver driver as drivers/usb/otg. Cleaning up MUSB BSP for 8500 crossover code. Gadget code sent out for internal ST-Ericsson review, will post publicly after resolved. * Posted the five uboot patches to the list, built and tested the first two on all available platforms. Need additional testing, especially on big-endian platforms such as PowerPC. * Reviewing status. A few specifications and blueprints not yet complete, status lagging on some. Working on New Members wiki page. * ST-Ericsson Landing team going well. Finding problems, getting fixes. Waiting on some fixes from internal ST-Ericsson teams. Currently relying on to-be-written functionality. Team is under NDA, so can pull some patches from internal teams prior to upstreaming. Some issues with source-tree organization within ST-Ericsson, which is being resolved by having a single tree that functionality is added to via topic branches. * Thumb 2 work progressing. A couple of patches to be merged into 2.6.36 tree. Freescale BSP review progress. * OMAP4-EHCI support queued up in linux-usb tree for 2.6.38 * Document describing Linaro kernel, will publish on list and ask for comments. * Completed blocked-task-list reorganization for RCU_TREE priority boosting, and started coding up changes needed to move from softirq to kthread. Possible RCU energy-consumption issue appearing on lightly loaded systems with modest numbers of CPUs: RCU prevents entry into dyntick-idle mode: Examining possible approaches. Please let me know if you have a question or comment, Regards, Mounir

15 years

[PATCH] export clock debug information to user space

by Yong Shen

Hi Jeremy, This is latest one for review. I add some minor changes in. Cheers Yong >From efe7fa8bea67f9bf532c0074a92d938e6d6f4c5d Mon Sep 17 00:00:00 2001 From: Yong Shen <yong.shen(a)linaro.org> Date: Thu, 18 Nov 2010 14:54:49 +0800 Subject: [PATCH] export clock debug information to user space create a tree-like directory structure in debugfs so user space tools like powerdebug can generate readable clock information. more functions tend to be add in, like individual clock enable/disable by writing to this debug interface. Signed-off-by: Yong Shen <yong.shen(a)linaro.org> --- arch/arm/common/Kconfig | 6 ++ arch/arm/common/clkdev.c | 3 + include/linux/clk.h | 18 +++++++ kernel/clk.c | 121 ++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 148 insertions(+), 0 deletions(-) diff --git a/arch/arm/common/Kconfig b/arch/arm/common/Kconfig index 0a34c81..13d7cf9 100644 --- a/arch/arm/common/Kconfig +++ b/arch/arm/common/Kconfig @@ -41,3 +41,9 @@ config SHARP_SCOOP config COMMON_CLKDEV bool select HAVE_CLK + +config CLK_DEBUG + bool "clock debug information export to user space" + depends on USE_COMMON_STRUCT_CLK && PM_DEBUG && DEBUG_FS + help + export clk debug information to user space diff --git a/arch/arm/common/clkdev.c b/arch/arm/common/clkdev.c index 9e4c4d9..1d08fb3 100644 --- a/arch/arm/common/clkdev.c +++ b/arch/arm/common/clkdev.c @@ -19,6 +19,7 @@ #include <linux/mutex.h> #include <linux/clk.h> #include <linux/slab.h> +#include <linux/debugfs.h> #include <asm/clkdev.h> @@ -104,6 +105,7 @@ EXPORT_SYMBOL(clk_put); void clkdev_add(struct clk_lookup *cl) { + clk_debug_register(cl->clk); mutex_lock(&clocks_mutex); list_add_tail(&cl->node, &clocks); mutex_unlock(&clocks_mutex); @@ -114,6 +116,7 @@ void __init clkdev_add_table(struct clk_lookup *cl, size_t num) { mutex_lock(&clocks_mutex); while (num--) { + clk_debug_register(cl->clk); list_add_tail(&cl->node, &clocks); cl++; } diff --git a/include/linux/clk.h b/include/linux/clk.h index 56416b7..4aaddea 100644 --- a/include/linux/clk.h +++ b/include/linux/clk.h @@ -48,12 +48,24 @@ struct clk { const struct clk_ops *ops; unsigned int enable_count; struct mutex mutex; +#ifdef CONFIG_CLK_DEBUG +#define CLK_NAME_LEN 32 + char name[CLK_NAME_LEN]; + struct dentry *dentry; +#endif }; +#ifdef CONFIG_CLK_DEBUG +#define __INIT_CLK_DEBUG(n) .name = #n, +#else +#define __INIT_CLK_DEBUG(n) +#endif + #define INIT_CLK(name, o) { \ .ops = &o, \ .enable_count = 0, \ .mutex = __MUTEX_INITIALIZER(name.mutex), \ + __INIT_CLK_DEBUG(name) \ } struct clk_ops { @@ -245,4 +257,10 @@ struct clk *clk_get_sys(const char *dev_id, const char *con_id); int clk_add_alias(const char *alias, const char *alias_dev_name, char *id, struct device *dev); +#ifdef CONFIG_CLK_DEBUG +void clk_debug_register(struct clk *clk); +#else +static inline void clk_debug_register(struct clk *clk) {} +#endif + #endif diff --git a/kernel/clk.c b/kernel/clk.c index 32f25ef..7f8bea9 100644 --- a/kernel/clk.c +++ b/kernel/clk.c @@ -11,6 +11,8 @@ #include <linux/clk.h> #include <linux/mutex.h> #include <linux/module.h> +#include <linux/slab.h> +#include <linux/debugfs.h> int clk_enable(struct clk *clk) { @@ -113,3 +115,122 @@ struct clk_ops clk_fixed_ops = { .get_rate = clk_fixed_get_rate, }; EXPORT_SYMBOL_GPL(clk_fixed_ops); + +#ifdef CONFIG_CLK_DEBUG +/* + * debugfs support to trace clock tree hierarchy and attributes + */ +static int clk_debug_rate_get(void *data, u64 *val) +{ + struct clk *clk = data; + + *val = (u64)clk_get_rate(clk); + return 0; +} +DEFINE_SIMPLE_ATTRIBUTE(clk_debug_rate_fops, clk_debug_rate_get, NULL, + "%llu\n"); + + +static struct dentry *clk_root; +static int clk_debug_register_one(struct clk *clk) +{ + int err; + struct dentry *d, *child, *child_tmp; + struct clk *pa = clk_get_parent(clk); + + if (pa && !IS_ERR(pa)) + d = debugfs_create_dir(clk->name, pa->dentry); + else { + if (!clk_root) + clk_root = debugfs_create_dir("clocks", NULL); + if (!clk_root) + return -ENOMEM; + d = debugfs_create_dir(clk->name, clk_root); + } + + if (!d) + return -ENOMEM; + + clk->dentry = d; + + d = debugfs_create_u32("enable_count", S_IRUGO, clk->dentry, + (u32 *)&clk->enable_count); + if (!d) { + err = -ENOMEM; + goto err_out; + } + + d = debugfs_create_file("rate", S_IRUGO, clk->dentry, (void *)clk, + &clk_debug_rate_fops); + if (!d) { + err = -ENOMEM; + goto err_out; + } + + return 0; + +err_out: + d = clk->dentry; + list_for_each_entry_safe(child, child_tmp, &d->d_subdirs, d_u.d_child) + debugfs_remove(child); + debugfs_remove(clk->dentry); + return err; +} + +struct preinit_clk { + struct list_head list; + struct clk *clk; +}; +static LIST_HEAD(preinit_clks); +static DEFINE_MUTEX(preinit_lock); +static int init_done; + +void clk_debug_register(struct clk *clk) +{ + int err; + struct clk *pa; + + if (init_done) { + pa = clk_get_parent(clk); + + if (pa && !IS_ERR(pa) && !pa->dentry) + clk_debug_register(pa); + + if (!clk->dentry) { + err = clk_debug_register_one(clk); + if (err) + return; + } + } else { + struct preinit_clk *p; + mutex_lock(&preinit_lock); + p = kmalloc(sizeof(*p), GFP_KERNEL); + if (!p) + goto unlock; + p->clk = clk; + list_add(&p->list, &preinit_clks); +unlock: + mutex_unlock(&preinit_lock); + } +} +EXPORT_SYMBOL_GPL(clk_debug_register); + +static int __init clk_debugfs_init(void) +{ + struct preinit_clk *pclk, *tmp; + + if (debugfs_initialized()) + init_done = 1; + + list_for_each_entry(pclk, &preinit_clks, list) { + clk_debug_register(pclk->clk); + } + + list_for_each_entry_safe(pclk, tmp, &preinit_clks, list) { + list_del(&pclk->list); + kfree(pclk); + } + return 0; +} +late_initcall(clk_debugfs_init); +#endif -- 1.7.0.4

15 years

[ACTIVITY] Toolchain WG 2010-11-03

by Michael Hope

Here's what the toolchain group has been doing: * 2010.12 release is coming up. Bug list is in a good way. Build is good, test results are good. * Atomic memory operations are finished, in GCC, in GLIBC, and in Ubuntu. Coverage report is done at [[WorkingGroups/ToolChain/AtomicMemoryOperations]] * Handed off valgrind to Foundations to make sure the updated version is in Ubuntu * String routines are approaching the end of a good phase 1. Next is sorting out the copyright assignment issues * Lack of A9 hardware is causing headaches. People are benchmarking Linaro GCC on hardware and getting unexpected results. * Started investigating libffi variadic support * Received a copy of the SPEC CPU 2006 benchmark suite Weekly meeting minutes are at: https://wiki.linaro.org/WorkingGroups/ToolChain/Meetings/2010-12-06 Standup minutes are at: https://wiki.linaro.org/WorkingGroups/ToolChain/Meetings/2010-12-08 Audio is here: http://tc.seabright.co.nz/toolchainwg/ -- Michael

15 years

Linaro QEMU package in Ubuntu?

by Jani Monoses

Hello, one of the Ubuntu blueprints for 11.04 is to provide a QEMU better suited to Linaro/ARM work in the official archives, allowing to test at least the official Ubuntu ARM images. The Linaro PPA provides a package based on qemu-maemo from gitorious, and it is ahead of what is packaged in that it supports the BeagleBoard. I see there's also qemu-arm repo in git.linaro.org - I assume this is a newer and preferable upstream to the maemo one? Are the ARM patches being pushed and accepted into upstream QEMU regularly? In this case there may be no need to create a new package and just wait for that work to get released and packaged, and maybe focus the effort on helping with upstreaming the ARM changes. any pointers appreciated :) thanks Jani

15 years

[PATCH v2 0/3] ARM: omap: Thumb-2 kernel compatibility fixes

by Dave Martin

These patches enable the omap kernel to build and work in Thumb-2 (CONFIG_THUMB2_KERNEL). They may make useful reading for all low-level BSP maintainers, since in general similar issues tend to crop up whenever migrating code to support Thumb-2. Tested on: omap3 (Beagle xM A2) Not tested on any other platforms yet. Dave Martin (3): ARM: omap: Enable low-level omap3 PM code to work with CONFIG_THUMB2_KERNEL ARM: omap4: Correct definition of do_wfi() for CONFIG_THUMB2_KERNEL ARM: omap4: Convert END() to ENDPROC() for correct linkage with CONFIG_THUMB2_KERNEL arch/arm/mach-omap2/include/mach/omap4-common.h | 5 +++ arch/arm/mach-omap2/omap-headsmp.S | 2 +- arch/arm/mach-omap2/omap44xx-smc.S | 8 ++-- arch/arm/mach-omap2/pm.h | 2 + arch/arm/mach-omap2/pm34xx.c | 13 ++++++-- arch/arm/mach-omap2/sleep34xx.S | 37 +++++++++++++++++++++-- arch/arm/mach-omap2/sram34xx.S | 34 +++++++++++++++----- arch/arm/plat-omap/include/plat/sram.h | 1 + arch/arm/plat-omap/sram.c | 10 +++++- 9 files changed, 90 insertions(+), 22 deletions(-)

15 years

license for setup_sdcard.sh

by John Rigby

Hi Robert, The Linaro project has a script that started as your setup_sdcard.sh called linaro_media_create. As part of our release process we need to have licenses for our files and since our script is based on yours, your choice of license affects what choices we have. So long story short, your file has no license included so care to add one or just tell us what the license is so we can give our script a compatible if not identical one? Thanks John

15 years

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linaro-dev December 2010