linaro-kernel December 2013

linaro-kernel@lists.linaro.org

83 participants
265 discussions

[PATCH V4] cpufreq: suspend governors on system suspend/hibernate

by Viresh Kumar

This patch adds cpufreq callbacks to dpm_{suspend|resume}_noirq() for handling suspend/resume of cpufreq governors. There are multiple problems that are fixed by this patch: - Nishanth Menon (TI) found an interesting problem on his platform, OMAP. His board wasn't working well with suspend/resume as calls for removing non-boot CPUs was turning out into a call to drivers ->target() which then tries to play with regulators. But regulators and their I2C bus were already suspended and this resulted in a failure. Many platforms have such problems, samsung, tegra, etc.. They solved it with driver specific PM notifiers where they used to disable their driver's ->target() routine. - Lan Tianyu (Intel) & Jinhyuk Choi (Broadcom) found another issue where tunables configuration for clusters/sockets with non-boot CPUs was getting lost after suspend/resume, as we were notifying governors with CPUFREQ_GOV_POLICY_EXIT on removal of the last cpu for that policy and so deallocating memory for tunables. This is also fixed with this patch as we don't allow any operation on Governors during suspend/resume now. Reported-and-tested-by: Lan Tianyu <tianyu.lan(a)intel.com> Reported-and-tested-by: Nishanth Menon <nm(a)ti.com> Reported-by: Jinhyuk Choi <jinchoi(a)broadcom.com> Signed-off-by: Viresh Kumar <viresh.kumar(a)linaro.org> --- This is almost same as 1/6 of V3 version of this patchset: https://lkml.org/lkml/2013/11/25/838 This is done to get some initial fixes for 3.13. These are already tested by both the reporters of initial problems. Tegra/exynos/s5p will keep running their PM notifiers until v3.14, as they are currently able to work with them.. drivers/base/power/main.c | 3 +++ drivers/cpufreq/cpufreq.c | 50 +++++++++++++++++++++++++++++++++++++++++++++++ include/linux/cpufreq.h | 8 ++++++++ 3 files changed, 61 insertions(+) diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index 1b41fca..e3219df 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -29,6 +29,7 @@ #include <linux/async.h> #include <linux/suspend.h> #include <trace/events/power.h> +#include <linux/cpufreq.h> #include <linux/cpuidle.h> #include <linux/timer.h> @@ -540,6 +541,7 @@ static void dpm_resume_noirq(pm_message_t state) dpm_show_time(starttime, state, "noirq"); resume_device_irqs(); cpuidle_resume(); + cpufreq_resume(); } /** @@ -955,6 +957,7 @@ static int dpm_suspend_noirq(pm_message_t state) ktime_t starttime = ktime_get(); int error = 0; + cpufreq_suspend(); cpuidle_pause(); suspend_device_irqs(); mutex_lock(&dpm_list_mtx); diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 02d534d..b6c7821 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -26,6 +26,7 @@ #include <linux/module.h> #include <linux/mutex.h> #include <linux/slab.h> +#include <linux/suspend.h> #include <linux/syscore_ops.h> #include <linux/tick.h> #include <trace/events/power.h> @@ -47,6 +48,9 @@ static LIST_HEAD(cpufreq_policy_list); static DEFINE_PER_CPU(char[CPUFREQ_NAME_LEN], cpufreq_cpu_governor); #endif +/* Flag to suspend/resume CPUFreq governors */ +static bool cpufreq_suspended; + static inline bool has_target(void) { return cpufreq_driver->target_index || cpufreq_driver->target; @@ -1462,6 +1466,48 @@ static struct subsys_interface cpufreq_interface = { .remove_dev = cpufreq_remove_dev, }; +/* + * Callbacks for suspending/resuming governors as some platforms can't change + * frequency after this point in suspend cycle. Because some of the devices + * (like: i2c, regulators, etc) they use for changing frequency are suspended + * quickly after this point. + */ +void cpufreq_suspend(void) +{ + struct cpufreq_policy *policy; + + if (!has_target()) + return; + + pr_debug("%s: Suspending Governors\n", __func__); + + list_for_each_entry(policy, &cpufreq_policy_list, policy_list) + if (__cpufreq_governor(policy, CPUFREQ_GOV_STOP)) + pr_err("%s: Failed to stop governor for policy: %p\n", + __func__, policy); + + cpufreq_suspended = true; +} + +void cpufreq_resume(void) +{ + struct cpufreq_policy *policy; + + if (!has_target()) + return; + + pr_debug("%s: Resuming Governors\n", __func__); + + cpufreq_suspended = false; + + list_for_each_entry(policy, &cpufreq_policy_list, policy_list) + if (__cpufreq_governor(policy, CPUFREQ_GOV_START) || + __cpufreq_governor(policy, + CPUFREQ_GOV_LIMITS)) + pr_err("%s: Failed to start governor for policy: %p\n", + __func__, policy); +} + /** * cpufreq_bp_suspend - Prepare the boot CPU for system suspend. * @@ -1764,6 +1810,10 @@ static int __cpufreq_governor(struct cpufreq_policy *policy, struct cpufreq_governor *gov = NULL; #endif + /* Don't start any governor operations if we are entering suspend */ + if (cpufreq_suspended) + return 0; + if (policy->governor->max_transition_latency && policy->cpuinfo.transition_latency > policy->governor->max_transition_latency) { diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index dc196bb..ee5fe9d 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -280,6 +280,14 @@ cpufreq_verify_within_cpu_limits(struct cpufreq_policy *policy) policy->cpuinfo.max_freq); } +#ifdef CONFIG_CPU_FREQ +void cpufreq_suspend(void); +void cpufreq_resume(void); +#else +static inline void cpufreq_suspend(void) {} +static inline void cpufreq_resume(void) {} +#endif + /********************************************************************* * CPUFREQ NOTIFIER INTERFACE * *********************************************************************/ -- 1.7.12.rc2.18.g61b472e

11 years

nohz_full left a periodic tick cpu issue

by Alex Shi

Hi Frederic, Sorry for idiot of nohz_full. When we using this feature on my mobile devices, we found this feature keep cpu0 in periodic tick mode. then the timer interrupt on cpu0 is very higher than normal nohz mode. that cause high power consuming cost. I found you have mention this on commit: a382bf934449 nohz: Assign timekeeping duty to a CPU outside the full dynticks range In fact, if all full dynticks cpu are in idle, cpu0 should be safe to get into idle too. Do you have some plan or idea to implement this? otherwise, power cost is too high to enable nohz_full in mobile platform. -- Thanks Alex

11 years

arm-soc boot: 30 pass, 1 fail (v3.13-rc3-237-g72913fe)

by Kevin's boot bot

Automated DT boot report for various ARM defconfigs. Tree/Branch: arm-soc Git describe: v3.13-rc3-237-g72913fe Failed boot tests (console logs at the end) =========================================== omap4-panda: FAIL: omap2plus_defconfig Full Report =========== omap2plus_defconfig ------------------- am335x-boneblack PASS: 0 min 27.8 sec omap3-beagle-xm PASS: 0 min 53.2 sec am335x-bone PASS: 0 min 26.6 sec omap4-panda FAIL: 2 min 57.1 sec omap4-panda-es PASS: 1 min 3.3 sec omap3-tobi,3730storm PASS: 0 min 21.0 sec omap3-tobi,3530overo PASS: 0 min 21.8 sec tegra_defconfig --------------- tegra30-beaver PASS: 0 min 16.9 sec imx_v6_v7_defconfig ------------------- imx6dl-wandboard,wand-dual PASS: 0 min 18.2 sec imx6dl-wandboard,wand-solo PASS: 0 min 18.3 sec imx6q-wandboard PASS: 0 min 16.7 sec sunxi_defconfig --------------- sun7i-a20-cubieboard2 PASS: 0 min 12.1 sec mvebu_defconfig --------------- armada-xp-openblocks-ax3-4 PASS: 0 min 22.1 sec armada-370-mirabox PASS: 0 min 20.1 sec multi_v7_defconfig ------------------ ste-snowball PASS: 0 min 32.2 sec tegra30-beaver PASS: 0 min 16.5 sec am335x-boneblack PASS: 0 min 24.7 sec omap3-beagle-xm PASS: 0 min 50.5 sec sun7i-a20-cubieboard2 PASS: 0 min 13.0 sec armada-370-mirabox PASS: 0 min 20.7 sec omap4-panda PASS: 0 min 59.8 sec omap4-panda-es PASS: 1 min 2.8 sec armada-xp-openblocks-ax3-4 PASS: 0 min 22.8 sec imx6dl-wandboard,wand-solo PASS: 0 min 17.7 sec am335x-bone PASS: 0 min 23.4 sec imx6q-wandboard PASS: 0 min 16.8 sec omap3-tobi,3730storm PASS: 0 min 22.7 sec imx6dl-wandboard,wand-dual PASS: 0 min 17.8 sec omap3-tobi,3530overo PASS: 0 min 20.0 sec u8500_defconfig --------------- ste-snowball PASS: 0 min 30.9 sec sama5_defconfig --------------- sama5d35ek PASS: 0 min 17.3 sec Console logs for failures ========================= omap2plus_defconfig ------------------- omap4-panda: FAIL: last 24 lines of boot log: --------------------------------------------- [ 2.380645] 4809c000.mmc supply vmmc_aux not found, using dummy regulator [ 2.390411] omap_hsmmc 4809c000.mmc: pins are not configured from the driver [ 2.450683] omap-dma-engine 4a056000.dma-controller: allocating channel for 60 [ 2.458435] omap-dma-engine 4a056000.dma-controller: allocating channel for 59 [ 2.466278] 480d5000.mmc supply vmmc_aux not found, using dummy regulator [ 2.548736] mmc0: host does not support reading read-only switch. assuming write-enable. [ 2.559631] mmc0: new high speed SD card at address f3c2 [ 2.566711] isa bounce pool size: 16 pages [ 2.572692] mmcblk0: mmc0:f3c2 SD02G 1.84 GiB [ 2.583648] mmcblk0: p1 p2 [ 2.683990] twl_rtc rtc.10: setting system clock to 2000-03-01 18:22:01 UTC (951934921) [ 18.105590] omap_uart 48020000.serial: no wakeirq for uart2 [ 19.404296] EXT4-fs (mmcblk0p2): recovery complete [ 19.417846] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null) [ 19.426422] VFS: Mounted root (ext4 filesystem) on device 179:2. [ 19.435058] devtmpfs: mounted [ 19.439147] Freeing unused kernel memory: 384K (c0780000 - c07e0000) [ 19.775482] random: init urandom read with 50 bits of entropy available [ 20.063049] init: ureadahead main process (811) terminated with status 5 [ 20.072723] omap_uart 48020000.serial: no wakeirq for uart2 ~$off # PYBOOT: Exception: userspace: ERROR: Never found root shell # PYBOOT: Time: 177.11 seconds. # PYBOOT: Result: FAIL

11 years

[LSK PATCH] Revert "ARM: bL_switcher: Allow detachment of outstanding switch requests"

by Jon Medhurst (Tixy)

This reverts commit 4725d41daea7e0cc79b3fb92af012b8cb18fccff. This patch was dropped when the big.LITTLE switcher was submitted to the mainline kernel because it wasn't then being used and contained a logical flaw which meant it wouldn't have achieved what it was attempting to do anyway. It can also produce compilation warnings in certain configurations. --- arch/arm/common/bL_switcher.c | 32 -------------------------------- arch/arm/include/asm/bL_switcher.h | 6 ------ 2 files changed, 38 deletions(-) diff --git a/arch/arm/common/bL_switcher.c b/arch/arm/common/bL_switcher.c index 1883c5b..2193ae7 100644 --- a/arch/arm/common/bL_switcher.c +++ b/arch/arm/common/bL_switcher.c @@ -404,38 +404,6 @@ int bL_switch_request_cb(unsigned int cpu, unsigned int new_cluster_id, EXPORT_SYMBOL_GPL(bL_switch_request_cb); /* - * Detach an outstanding switch request. - * - * The switcher will continue with the switch request in the background, - * but the completer function will not be called. - * - * This may be necessary if the completer is in a kernel module which is - * about to be unloaded. - */ -void bL_switch_request_detach(unsigned int cpu, - bL_switch_completion_handler completer) -{ - struct bL_thread *t; - - if (cpu >= ARRAY_SIZE(bL_threads)) { - pr_err("%s: cpu %d out of bounds\n", __func__, cpu); - return; - } - - t = &bL_threads[cpu]; - - if (IS_ERR(t->task) || !t->task) - return; - - spin_lock(&t->lock); - if (t->completer == completer) - t->completer = NULL; - spin_unlock(&t->lock); -} - -EXPORT_SYMBOL_GPL(bL_switch_request_detach); - -/* * Activation and configuration code. */ diff --git a/arch/arm/include/asm/bL_switcher.h b/arch/arm/include/asm/bL_switcher.h index 482383b..87ebcbc 100644 --- a/arch/arm/include/asm/bL_switcher.h +++ b/arch/arm/include/asm/bL_switcher.h @@ -40,9 +40,6 @@ static inline int bL_switch_request(unsigned int cpu, unsigned int new_cluster_i #ifdef CONFIG_BL_SWITCHER -void bL_switch_request_detach(unsigned int cpu, - bL_switch_completion_handler completer); - int bL_switcher_register_notifier(struct notifier_block *nb); int bL_switcher_unregister_notifier(struct notifier_block *nb); @@ -61,9 +58,6 @@ int bL_switcher_trace_trigger(void); int bL_switcher_get_logical_index(u32 mpidr); #else -static void bL_switch_request_detach(unsigned int cpu, - bL_switch_completion_handler completer) { } - static inline int bL_switcher_register_notifier(struct notifier_block *nb) { return 0; -- 1.7.10.4

11 years

[GIT PULL 00/34] perf/core improvements and fixes

by Arnaldo Carvalho de Melo

From: Arnaldo Carvalho de Melo <acme(a)ghostprotocols.net> Hi Ingo, The first 20 patches in this series are the same as in the previous one, so I'm not reposting them now. This series has the code style/constification changes you suggested in the symbols code and then a reworked fix to the basename problem plus some more patches not present in the previous series. Please let me know if you find any further problems, Best Regards, - Arnaldo The following changes since commit 6d65894bc028d0342829ea1e64c9e9efad571124: tools lib traceevent: Update kvm plugin with is_writable_pte helper (2013-12-04 15:38:14 -0300) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux tags/perf-core-for-mingo for you to fetch changes up to 1448fef40af6079de38380c3a81bcf9994a1037d: perf unwinding: Use the per-feature check flags (2013-12-10 16:51:12 -0300) ---------------------------------------------------------------- perf/core improvements and fixes: . Add an option in 'perf script' to print the source line number, from Adrian Hunter . Add --header/--header-only options to 'script' and 'report', the default is not tho show the header info, but as this has been the default for some time, leave a single line explaining how to obtain that information, from Jiri Olsa. . Fix symoff printing in callchains in 'perf script', from Adrian Hunter. . Assorted mmap_pages handling fixes, from Adrian Hunter. . Fix summary percentage when processing files in 'perf trace', fom David Ahern. . Handle old kernels where the "raw_syscalls" tracepoints were called plan "syscalls", in 'perf trace', from David Ahern. . Several man pages typo fixes from Dongsheng Yang. . Add '-v' option to 'perf kvm', from Dongsheng Yang. . Make perf kvm diff support --guestmount, from Dongsheng Yang. . Get rid of several die() calls in libtraceevent, from Namhyung Kim. . Use basename() in a more robust way, to avoid problems related to different system library implementations for that function, from Stephane Eranian. . Remove open coded management of short_name_allocated member, from Adrian Hunter . Several cleanups in the "dso" methods, constifying some parameters and renaming some fields to clarify its purpose. . Add per-feature check flags, fixing libunwind related build problems on some architectures, from Jean Pihet. Signed-off-by: Arnaldo Carvalho de Melo <acme(a)redhat.com> ---------------------------------------------------------------- Adrian Hunter (7): perf script: Fix symoff printing in callchains perf script: Add an option to print the source line number perf record: Fix display of incorrect mmap pages perf evlist: Remove unnecessary parentheses perf evlist: Fix max mmap_pages perf evlist: Fix mmap pages rounding to power of 2 perf symbols: Remove open coded management of short_name_allocated member Arnaldo Carvalho de Melo (8): perf symbols: Rename [sl]name_alloc to match the members they refer to perf machine: Don't open code assign dso->short_name perf symbols: Set alloc flag close to setting the long_name perf symbols: Remove open coded management of long_name_allocated member perf symbols: Constify dso->long_name perf symbols: Set freed members to NULL in dso destructor perf symbols: Constify some DSO methods parameters perf symbols: Rename filename argument David Ahern (2): perf trace: Add support for syscalls vs raw_syscalls perf trace: Fix summary percentage when processing files Dongsheng Yang (6): perf kvm: Introduce option -v for perf kvm command. perf kvm: Fix bug in 'stat report' perf archive: Remove duplicated 'runs' in man page perf annotate: Fix typo perf kvm: Move code to generate filename for perf-kvm to function. perf kvm: Make perf kvm diff support --guestmount. Jean Pihet (2): perf tools: Add per-feature check flags perf unwinding: Use the per-feature check flags Jiri Olsa (2): perf report: Add --header/--header-only options perf script: Add --header/--header-only options Namhyung Kim (5): tools lib traceevent: Get rid of malloc_or_die() in pevent_filter_alloc() tools lib traceevent: Get rid of malloc_or_die() in add_event() tools lib traceevent: Get rid of die() in create_arg_item() tools lib traceevent: Get rid of malloc_or_die() in pevent_filter_add_filter_str() tools lib traceevent: Get rid of die() in pevent_filter_clear_trivial() Stephane Eranian (1): perf symbols: Fix bug in usage of the basename() function Steven Rostedt (1): tools lib traceevent: Report better error message on bad function args tools/lib/traceevent/event-parse.c | 28 +++++--- tools/lib/traceevent/event-parse.h | 2 +- tools/lib/traceevent/parse-filter.c | 57 +++++++++++---- tools/perf/Documentation/perf-archive.txt | 6 +- tools/perf/Documentation/perf-kvm.txt | 7 +- tools/perf/Documentation/perf-report.txt | 9 +++ tools/perf/Documentation/perf-script.txt | 8 ++- tools/perf/builtin-annotate.c | 2 +- tools/perf/builtin-diff.c | 3 +- tools/perf/builtin-kvm.c | 11 ++- tools/perf/builtin-record.c | 2 +- tools/perf/builtin-report.c | 22 +++++- tools/perf/builtin-script.c | 23 +++++- tools/perf/builtin-trace.c | 32 ++++++++- tools/perf/config/Makefile | 52 ++++++++------ tools/perf/config/feature-checks/Makefile | 8 +-- tools/perf/util/annotate.c | 2 +- tools/perf/util/build-id.c | 2 +- tools/perf/util/build-id.h | 2 +- tools/perf/util/dso.c | 112 ++++++++++++++++++++---------- tools/perf/util/dso.h | 16 ++--- tools/perf/util/evlist.c | 10 +-- tools/perf/util/header.c | 6 +- tools/perf/util/machine.c | 6 +- tools/perf/util/map.c | 17 +++++ tools/perf/util/map.h | 2 + tools/perf/util/probe-event.c | 2 +- tools/perf/util/session.c | 15 +++- tools/perf/util/session.h | 1 + tools/perf/util/srcline.c | 2 +- tools/perf/util/symbol.c | 38 ++++------ tools/perf/util/symbol.h | 3 +- tools/perf/util/util.c | 14 ++++ tools/perf/util/util.h | 14 ++++ tools/perf/util/vdso.c | 2 +- 35 files changed, 375 insertions(+), 163 deletions(-)

11 years

queue boot: 12 pass, 2 fail (v3.10.23-53-g1171ae2)

by Kevin's boot bot

Automated DT boot report for various ARM defconfigs. Tree/Branch: queue Git describe: v3.10.23-53-g1171ae2 Failed boot tests (console logs at the end) =========================================== armada-xp-openblocks-ax3-4: FAIL: multi_v7_defconfig armada-370-mirabox: FAIL: multi_v7_defconfig Full Report =========== omap2plus_defconfig ------------------- omap3-beagle-xm PASS: 0 min 51.0 sec am335x-bone PASS: 0 min 26.3 sec omap4-panda PASS: 1 min 4.9 sec omap4-panda-es PASS: 1 min 14.0 sec omap3-tobi,3730storm PASS: 0 min 36.0 sec omap3-tobi,3530overo PASS: 0 min 33.6 sec tegra_defconfig --------------- tegra30-beaver PASS: 0 min 18.0 sec imx_v6_v7_defconfig ------------------- imx6dl-wandboard,wand-dual PASS: 0 min 16.7 sec imx6dl-wandboard,wand-solo PASS: 0 min 16.5 sec mvebu_defconfig --------------- armada-xp-openblocks-ax3-4 PASS: 0 min 21.4 sec armada-370-mirabox PASS: 0 min 19.6 sec multi_v7_defconfig ------------------ armada-xp-openblocks-ax3-4 FAIL: 0 min 20.1 sec armada-370-mirabox FAIL: 0 min 17.9 sec sama5_defconfig --------------- sama5d35ek PASS: 0 min 16.4 sec Console logs for failures ========================= multi_v7_defconfig ------------------ armada-xp-openblocks-ax3-4: FAIL: last 24 lines of boot log: ------------------------------------------------------------ [<c0013bcc>] (unwind_backtrace+0x0/0xf4) from [<c0011490>] (show_stack+0x10/0x14) [<c0011490>] (show_stack+0x10/0x14) from [<c0275c60>] (panic+0xa0/0x1e8) [<c0275c60>] (panic+0xa0/0x1e8) from [<c0329110>] (mount_block_root+0x294/0x298) [<c0329110>] (mount_block_root+0x294/0x298) from [<c03292c4>] (prepare_namespace+0x14c/0x184) [<c03292c4>] (prepare_namespace+0x14c/0x184) from [<c0328d60>] (kernel_init_freeable+0x1c8/0x1d8) [<c0328d60>] (kernel_init_freeable+0x1c8/0x1d8) from [<c02719c4>] (kernel_init+0x8/0x158) [<c02719c4>] (kernel_init+0x8/0x158) from [<c000df18>] (ret_from_fork+0x14/0x3c) CPU0: stopping CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.10.23-00053-g1171ae2 #1 [<c0013bcc>] (unwind_backtrace+0x0/0xf4) from [<c0011490>] (show_stack+0x10/0x14) [<c0011490>] (show_stack+0x10/0x14) from [<c001234c>] (handle_IPI+0x108/0x130) [<c001234c>] (handle_IPI+0x108/0x130) from [<c000851c>] (armada_370_xp_handle_irq+0x90/0xa8) [<c000851c>] (armada_370_xp_handle_irq+0x90/0xa8) from [<c000dac0>] (__irq_svc+0x40/0x50) Exception stack(0xc0359f70 to 0xc0359fb8) 9f60: c1d5b6d8 00000000 000000c2 000000c2 9f80: c03604a8 c0358000 c036045c c0383b6c c027debc c0358000 c0383b6c c0358000 9fa0: 0000001f c0359fb8 c000f070 c004f948 60000113 ffffffff [<c000dac0>] (__irq_svc+0x40/0x50) from [<c004f948>] (cpu_startup_entry+0xfc/0x140) [<c004f948>] (cpu_startup_entry+0xfc/0x140) from [<c0328a3c>] (start_kernel+0x2c4/0x2d0) [<c0328a3c>] (start_kernel+0x2c4/0x2d0) from [<00008074>] (0x8074) ~$off # PYBOOT: Exception: kernel: ERROR: failed to boot: Kernel panic # PYBOOT: Time: 20.13 seconds. # PYBOOT: Result: FAIL armada-370-mirabox: FAIL: last 24 lines of boot log: ---------------------------------------------------- mousedev: PS/2 mouse device common for all mice sdhci: Secure Digital Host Controller Interface driver sdhci: Copyright(c) Pierre Ossman sdhci-pltfm: SDHCI platform and OF driver helper usbcore: registered new interface driver usbhid usbhid: USB HID core driver VFP support v0.3: implementor 56 architecture 2 part 20 variant 9 rev 6 Registering SWP/SWPB emulation handler /home/build/work/batch/drivers/rtc/hctosys.c: unable to open rtc device (rtc0) List of all partitions: No filesystem could mount root, tried: Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.10.23-00053-g1171ae2 #1 [<c0013bcc>] (unwind_backtrace+0x0/0xf4) from [<c0011490>] (show_stack+0x10/0x14) [<c0011490>] (show_stack+0x10/0x14) from [<c0275c60>] (panic+0xa0/0x1e8) [<c0275c60>] (panic+0xa0/0x1e8) from [<c0329110>] (mount_block_root+0x294/0x298) [<c0329110>] (mount_block_root+0x294/0x298) from [<c03292c4>] (prepare_namespace+0x14c/0x184) [<c03292c4>] (prepare_namespace+0x14c/0x184) from [<c0328d60>] (kernel_init_freeable+0x1c8/0x1d8) [<c0328d60>] (kernel_init_freeable+0x1c8/0x1d8) from [<c02719c4>] (kernel_init+0x8/0x158) [<c02719c4>] (kernel_init+0x8/0x158) from [<c000df18>] (ret_from_fork+0x14/0x3c) ~$off # PYBOOT: Exception: kernel: ERROR: failed to boot: Kernel panic # PYBOOT: Time: 17.92 seconds. # PYBOOT: Result: FAIL

11 years

[RFC PATCH 0/2] arm64: Add support for 48-bit Physical Addresses

by mohun106＠gmail.com

From: Radha Mohan Chintakuntla <rchintakuntla(a)cavium.com> This patch series provides an implementation of supporting 48-bit Physical Addresses for ARMv8 platforms. It is the maximum width that any ARMv8 based processor can support. The implementation extends the existing support of 40-bit PA.The kernel and user space will now be able to access 128TB each. With 4KB page size the Linux now will be using 4 levels of page tables by making use of 'pud'. And with 64KB page size the Linux will be using 3 levels of page tables. The code has been tested with LTP. Radha Mohan Chintakuntla (2): arm64: Add support for 48-bit Physical Addresses arm64: Add 48-bit PA support for 64KB page size arch/arm64/include/asm/memory.h | 6 +-- arch/arm64/include/asm/page.h | 4 +- arch/arm64/include/asm/pgalloc.h | 20 ++++++- arch/arm64/include/asm/pgtable-3level-hwdef.h | 34 ++++++++++++ arch/arm64/include/asm/pgtable-4level-hwdef.h | 57 ++++++++++++++++++++ arch/arm64/include/asm/pgtable-4level-types.h | 71 +++++++++++++++++++++++++ arch/arm64/include/asm/pgtable-hwdef.h | 9 ++-- arch/arm64/include/asm/pgtable.h | 50 +++++++++++++++--- arch/arm64/include/asm/tlb.h | 2 - arch/arm64/kernel/head.S | 55 +++++++++++++++++-- arch/arm64/kernel/traps.c | 7 +++ arch/arm64/mm/proc.S | 2 +- 12 files changed, 289 insertions(+), 28 deletions(-) create mode 100644 arch/arm64/include/asm/pgtable-4level-hwdef.h create mode 100644 arch/arm64/include/asm/pgtable-4level-types.h

11 years

next boot: 31 pass, 0 fail (next-20131211)

by Kevin's boot bot

Automated DT boot report for various ARM defconfigs. Tree/Branch: next Git describe: next-20131211 Full Report =========== omap2plus_defconfig ------------------- am335x-boneblack PASS: 0 min 28.0 sec omap3-beagle-xm PASS: 0 min 50.8 sec am335x-bone PASS: 0 min 26.8 sec omap4-panda PASS: 1 min 5.3 sec omap4-panda-es PASS: 1 min 3.3 sec omap3-tobi,3730storm PASS: 0 min 21.1 sec omap3-tobi,3530overo PASS: 0 min 22.0 sec tegra_defconfig --------------- tegra30-beaver PASS: 0 min 16.9 sec imx_v6_v7_defconfig ------------------- imx6dl-wandboard,wand-dual PASS: 0 min 16.9 sec imx6dl-wandboard,wand-solo PASS: 0 min 18.4 sec imx6q-wandboard PASS: 0 min 16.8 sec sunxi_defconfig --------------- sun7i-a20-cubieboard2 PASS: 0 min 12.2 sec mvebu_defconfig --------------- armada-xp-openblocks-ax3-4 PASS: 0 min 22.0 sec armada-370-mirabox PASS: 0 min 20.2 sec multi_v7_defconfig ------------------ ste-snowball PASS: 0 min 29.7 sec tegra30-beaver PASS: 0 min 14.2 sec am335x-boneblack PASS: 0 min 24.8 sec omap3-beagle-xm PASS: 0 min 50.5 sec sun7i-a20-cubieboard2 PASS: 0 min 13.2 sec armada-370-mirabox PASS: 0 min 20.7 sec omap4-panda PASS: 1 min 2.6 sec omap4-panda-es PASS: 1 min 1.4 sec armada-xp-openblocks-ax3-4 PASS: 0 min 22.9 sec imx6dl-wandboard,wand-solo PASS: 0 min 16.6 sec am335x-bone PASS: 0 min 24.6 sec imx6q-wandboard PASS: 0 min 16.0 sec omap3-tobi,3730storm PASS: 0 min 19.6 sec imx6dl-wandboard,wand-dual PASS: 0 min 16.8 sec omap3-tobi,3530overo PASS: 0 min 20.3 sec u8500_defconfig --------------- ste-snowball PASS: 0 min 31.1 sec sama5_defconfig --------------- sama5d35ek PASS: 0 min 17.6 sec

11 years

queue boot: 30 pass, 0 fail (v3.12.4-63-g3d761f4)

by Kevin's boot bot

Automated DT boot report for various ARM defconfigs. Tree/Branch: queue Git describe: v3.12.4-63-g3d761f4 Full Report =========== omap2plus_defconfig ------------------- am335x-boneblack PASS: 0 min 27.3 sec omap3-beagle-xm PASS: 0 min 52.4 sec am335x-bone PASS: 0 min 26.2 sec omap4-panda PASS: 1 min 5.8 sec omap4-panda-es PASS: 1 min 7.2 sec omap3-tobi,3730storm PASS: 0 min 23.3 sec omap3-tobi,3530overo PASS: 0 min 21.5 sec tegra_defconfig --------------- tegra30-beaver PASS: 0 min 22.8 sec imx_v6_v7_defconfig ------------------- imx6dl-wandboard,wand-dual PASS: 0 min 16.1 sec imx6dl-wandboard,wand-solo PASS: 0 min 16.0 sec imx6q-wandboard PASS: 0 min 14.8 sec mvebu_defconfig --------------- armada-xp-openblocks-ax3-4 PASS: 0 min 21.9 sec armada-370-mirabox PASS: 0 min 20.1 sec multi_v7_defconfig ------------------ ste-snowball PASS: 0 min 28.3 sec tegra30-beaver PASS: 0 min 20.9 sec am335x-boneblack PASS: 0 min 34.5 sec omap3-beagle-xm PASS: 0 min 51.1 sec sun7i-a20-cubieboard2 PASS: 0 min 12.9 sec armada-370-mirabox PASS: 0 min 20.6 sec omap4-panda PASS: 0 min 59.1 sec omap4-panda-es PASS: 1 min 4.0 sec armada-xp-openblocks-ax3-4 PASS: 0 min 22.6 sec imx6dl-wandboard,wand-solo PASS: 0 min 16.4 sec am335x-bone PASS: 0 min 33.2 sec imx6q-wandboard PASS: 0 min 15.7 sec omap3-tobi,3730storm PASS: 0 min 22.4 sec imx6dl-wandboard,wand-dual PASS: 0 min 16.6 sec omap3-tobi,3530overo PASS: 0 min 20.0 sec u8500_defconfig --------------- ste-snowball PASS: 0 min 36.7 sec sama5_defconfig --------------- sama5d35ek PASS: 0 min 17.3 sec

11 years

[PATCH 0/2] PSCI system off and reset for KVM ARM/ARM64

by Anup Patel

The Power State and Coordination Interface (PSCI) specification defines SYSTEM_OFF and SYSTEM_RESET functions for system poweroff and reboot. This patchset adds emulation of PSCI SYSTEM_OFF and SYSTEM_RESET functions in KVM ARM/ARM64 by forwarding them to user space (QEMU or KVMTOOL) using KVM_EXIT_SHUTDOWN and KVM_EXIT_RESET exit reasons. To try this patch from guest kernel, we will need PSCI-based restart and poweroff support in the guest kenel for both ARM and ARM64. Rob Herring has already submitted patches for PSCI-based restart and poweroff in ARM kernel but these are not merged yet due unstable device tree bindings of kernel PSCI support. We will be having similar patches for PSCI-based restart and poweroff in ARM64 kernel. (Refer http://www.spinics.net/lists/arm-kernel/msg262217.html) (Refer http://www.spinics.net/lists/devicetree/msg05348.html) Anup Patel (2): KVM: Add KVM_EXIT_RESET to user space API header ARM/ARM64: KVM: Forward PSCI SYSTEM_OFF and SYSTEM_RESET to user space arch/arm/include/asm/kvm_psci.h | 2 +- arch/arm/include/uapi/asm/kvm.h | 2 ++ arch/arm/kvm/handle_exit.c | 7 ++++++- arch/arm/kvm/psci.c | 38 +++++++++++++++++++++++++++++-------- arch/arm64/include/asm/kvm_psci.h | 2 +- arch/arm64/include/uapi/asm/kvm.h | 2 ++ arch/arm64/kvm/handle_exit.c | 10 ++++++---- include/uapi/linux/kvm.h | 1 + 8 files changed, 49 insertions(+), 15 deletions(-) -- 1.7.9.5

11 years

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linaro-kernel December 2013