AFTR does not work on arndale 5250

AFTR does not work on arndale 5250

[Daniel Lezcano]

Hi,

I tried to make the idle AFTR state working on arndale 5250 but that 
leads to a kernel reboot and crash.

How to reproduce ?

echo 0 > /sys/devices/system/cpu/cpu1/online

Reproductible on v3.14 and samsung/for-next

Any ideas ?

Thanks

   -- Daniel

-- 
  <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs

Follow Linaro:  <http://www.facebook.com/pages/Linaro> Facebook |
<http://twitter.com/#!/linaroorg> Twitter |
<http://www.linaro.org/linaro-blog/> Blog

Re: AFTR does not work on arndale 5250

[Tomasz Figa]

Hi Daniel,

On 04.04.2014 15:06, Daniel Lezcano wrote:
>
> Hi,
>
> I tried to make the idle AFTR state working on arndale 5250 but that
> leads to a kernel reboot and crash.
>
> How to reproduce ?
>
> echo 0 > /sys/devices/system/cpu/cpu1/online
>
> Reproductible on v3.14 and samsung/for-next
>
> Any ideas ?

Added some people that I know that have been working with Arndale.

Best regards,
Tomasz

Re: AFTR does not work on arndale 5250

[Vikas Sajjan]

 Hi Daniel,

 I checked AFTR on v3.14 (
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/log/?id=refs/tags/v3.14)
 on exynos5250 based chromebook (exynos5250-snow.dtb)

I am able to hotplug CPU1  (echo 0 > /sys/devices/system/cpu/cpu1/online).
I can see, it enters exynos4_enter_core0_aftr() when I hotplug CPU1.



On Tue, Apr 8, 2014 at 4:31 PM, Tomasz Figa <t.figa@samsung.com> wrote:
> Hi Daniel,
>
>
> On 04.04.2014 15:06, Daniel Lezcano wrote:
>>
>>
>> Hi,
>>
>> I tried to make the idle AFTR state working on arndale 5250 but that
>> leads to a kernel reboot and crash.
>>
>> How to reproduce ?
>>
>> echo 0 > /sys/devices/system/cpu/cpu1/online
>>
>> Reproductible on v3.14 and samsung/for-next
>>
>> Any ideas ?
>
>
> Added some people that I know that have been working with Arndale.
>
> Best regards,
> Tomasz
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc"
> in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: AFTR does not work on arndale 5250

[Chander Kashyap]

Hi Daniel,

I have tested on v3.14 Stable on arndale board.
I have tested wit cramfs.

Last commit on tree is:

01d5f3b598b18a5035426c30801adf65822dbd0c

Below are the logs from the console.
$ uname -a
Linux (none) 3.14.0-00604-g0c6d388 #28 SMP PREEMPT Tue Apr 8 19:19:09
IST 2014 armv7l unknown

$ mount -t sysfs sys sys
/ $ echo 0 > /sys/devices/system/cpu/cpu1/online
[  152.439901] IRQ153 no longer affine to CPU1
[  152.440120] CPU1: shutdown

$ cat /sys/devices/system/cpu/cpu0/cpuidle/state1/usage
39
/ $ cat /sys/devices/system/cpu/cpu0/cpuidle/state1/usage
44
/ $ cat /sys/devices/system/cpu/cpu0/cpuidle/state1/usage
46
/ $ cat /sys/devices/system/cpu/cpu0/cpuidle/state1/usage
51
/ $ cat /sys/devices/system/cpu/cpu0/cpuidle/state1/usage
56
/ $ cat /sys/devices/system/cpu/cpu0/cpuidle/state1/usage
61
/ $


It is working perfectly fine.

If still issue is there, please feel free to ask.

On 4 April 2014 18:36, Daniel Lezcano <daniel.lezcano@linaro.org> wrote:
>
> Hi,
>
> I tried to make the idle AFTR state working on arndale 5250 but that leads
> to a kernel reboot and crash.
>
> How to reproduce ?
>
> echo 0 > /sys/devices/system/cpu/cpu1/online
>
> Reproductible on v3.14 and samsung/for-next
>
> Any ideas ?
>
> Thanks
>
>   -- Daniel
>
> --
>  <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs
>
> Follow Linaro:  <http://www.facebook.com/pages/Linaro> Facebook |
> <http://twitter.com/#!/linaroorg> Twitter |
> <http://www.linaro.org/linaro-blog/> Blog
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc"
> in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html



-- 
with warm regards,
Chander Kashyap

Re: AFTR does not work on arndale 5250

[Daniel Lezcano]

On 04/08/2014 03:32 PM, Vikas Sajjan wrote:
>   Hi Daniel,
>
>   I checked AFTR on v3.14 (
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/log/?id=refs/tags/v3.14)
>   on exynos5250 based chromebook (exynos5250-snow.dtb)
>
> I am able to hotplug CPU1  (echo 0 > /sys/devices/system/cpu/cpu1/online).
> I can see, it enters exynos4_enter_core0_aftr() when I hotplug CPU1.

Hi,

thanks a lot for your help.

I reproduced it on my arndale board with linux-samsung/for-next and on 
v3.14.

Used the exynos_defconfig, enabled cpuidle and used exynos5250-arndale.dtb.

I unplugged the cpu1 and then => reboot

echo 0 > /sys/devices/system/cpu/cpu1/online
[   10.220448] IRQ153 no longer affine to CPU1
[   10.220595] CPU1: shutdown
# [    0.000000] PERCPU: Embedded 7 pages/cpu @ee7c1000 s8192 r8192 
d12288 u32768
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on. 
Total pages: 516624
[    0.000000] Kernel command line: console=tty0 
console=ttySAC2,115200n8 drm_kms_helper.edid_firmware=edid-1920x1080.fw 
  root=UUID=fd363
[    0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes)
[    0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 
bytes)
[    0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 
bytes)
[    0.000000] Memory: 2047332K/2072576K available (3678K kernel code, 
228K rwdata, 1148K rodata, 224K init, 263K bss, 25244K reserved, )
[    0.000000] Virtual kernel memory layout:
[    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
[    0.000000]     fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
[    0.000000]     vmalloc : 0xf0000000 - 0xff000000   ( 240 MB)
[    0.000000]     lowmem  : 0xc0000000 - 0xef800000   ( 760 MB)
[    0.000000]     pkmap   : 0xbfe00000 - 0xc0000000   (   2 MB)
[    0.000000]     modules : 0xbf000000 - 0xbfe00000   (  14 MB)
[    0.000000]       .text : 0xc0008000 - 0xc04bebfc   (4827 kB)
[    0.000000]       .init : 0xc04bf000 - 0xc04f7000   ( 224 kB)
[    0.000000]       .data : 0xc04f8000 - 0xc05312c0   ( 229 kB)
[    0.000000]        .bss : 0xc05312cc - 0xc0573274   ( 264 kB)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
[    0.000000] Preemptible hierarchical RCU implementation.
[    0.000000]  RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=2.
[    0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
[    0.000000] NR_IRQS:16 nr_irqs:16 16
[    0.000000] Exynos5250: clock setup completed, armclk=1000000000
[    0.000000] Architected cp15 timer(s) running at 24.00MHz (phys).
[    0.000000] sched_clock: 56 bits at 24MHz, resolution 41ns, wraps 
every 2863311519744ns
[    0.000000] Switching to timer-based delay loop
[    0.000162] Console: colour dummy device 80x30
[    0.000510] console [tty0] enabled
[    0.000537] Calibrating delay loop (skipped), value calculated using 
timer frequency.. 48.00 BogoMIPS (lpj=120000)
[    0.000568] pid_max: default: 32768 minimum: 301
[    0.000793] Mount-cache hash table entries: 512
[    0.013127] CPU: Testing write buffer coherency: ok
[    0.013342] CPU0: update cpu_power 1024
[    0.013361] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[    0.013389] Setting up static identity map for 0x4037df28 - 0x4037df80
[    0.040384] CPU1: Booted secondary processor
[    0.040423] CPU1: update cpu_power 1024
[    0.040427] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
[    0.040511] Brought up 2 CPUs
[    0.040552] SMP: Total of 2 processors activated.
[    0.040564] CPU: All CPU(s) started in HYP mode.
[    0.040576] CPU: Virtualization extensions available.
[    0.041035] devtmpfs: initialized
[    0.044703] VFP support v0.3: implementor 41 architecture 4 part 30 
variant f rev 0
[    0.045189] pinctrl core: initialized pinctrl subsystem
[    0.045595] regulator-dummy: no parameters
[    0.045937] NET: Registered protocol family 16
[    0.046099] DMA: preallocated 256 KiB pool for atomic coherent 
allocations
[    0.047025] cpuidle: using governor menu
[    0.053567] exynos-audss-clk 3810000.audss-clock-controller: setup 
completed
[    0.061129] EXYNOS5250 PMU Initialize
[    0.073526] bio: create slab <bio-0> at 0
[    0.074229] MAIN_DC: no parameters
[    0.074479] VDD_33ON_2.8V: 2800 mV
[    0.074707] hdmi-en: no parameters
[    0.076562] SCSI subsystem initialized
[    0.077200] usbcore: registered new interface driver usbfs
[    0.077339] usbcore: registered new interface driver hub
[    0.077497] usbcore: registered new device driver usb
[    0.077983] s3c-i2c 12c60000.i2c: slave address 0x66
[    0.078004] s3c-i2c 12c60000.i2c: bus frequency set to 18 KHz
[    0.140328] VDD_ALIVE_1.0V: 1100 mV
[    0.160365] VDD_28IO_DP_1.35V: 1200 mV
[    0.180403] VDD_COMMON1_1.8V: 1800 mV
[    0.195432] VDD_IOPERI_1.8V: 1800 mV
[    0.215469] VDD_EXT_1.8V: 1800 mV
[    0.235505] VDD_MPLL_1.1V: 1100 mV
[    0.255542] VDD_XPLL_1.1V: 1100 mV
[    0.275579] VDD_COMMON2_1.0V: 1000 mV
[    0.290609] VDD_33ON_3.0V: 3000 mV
[    0.310644] VDD_COMMON3_1.8V: 1800 mV
[    0.330680] VDD_ABB2_1.8V: 1800 mV
[    0.350718] VDD_USB_3.0V: 3000 mV
[    0.370756] VDDQ_C2C_W_1.8V: 1800 mV
[    0.390794] VDD18_ABB0_3_1.8V: 1800 mV
[    0.410832] VDD10_COMMON4_1.0V: 1000 mV
[    0.430869] VDD18_HSIC_1.8V: 1800 mV
[    0.450907] VDDQ_MMC2_3_2.8V: 2800 mV
[    0.465937] VDD_33ON_2.8V: 2800 mV
[    0.480966] EXT_33_OFF: 3300 mV
[    0.495994] EXT_28_OFF: 2800 mV
[    0.511023] PVDD_LDO25: 1200 mV
[    0.526050] EXT_18_OFF: 1800 mV
[    0.541079] vdd_mif: 950 <--> 1200 mV at 1000 mV
[    0.556107] vdd_arm: 912 <--> 1300 mV at 1100 mV
[    0.571135] vdd_int: 900 <--> 1200 mV at 1000 mV
[    0.591173] vdd_g3d: 1000 mV
[    0.606202] VDD_MEM_1.35V: 750 <--> 1350 mV at 1200 mV
[    0.621231] PVDD_BUCK7: at 2050 mV
[    0.636258] PVDD_BUCK8: at 1350 mV
[    0.646278] VDD_33_OFF_EXT1: 750 <--> 3000 mV at 2850 mV
[    0.651602] s3c-i2c 12c60000.i2c: i2c-0: S3C I2C adapter
[    0.651718] s3c-i2c 12c80000.i2c: slave address 0x50
[    0.651738] s3c-i2c 12c80000.i2c: bus frequency set to 65 KHz
[    0.652194] s3c-i2c 12c80000.i2c: i2c-2: S3C I2C adapter
[    0.652298] s3c-i2c 12c90000.i2c: slave address 0x00
[    0.652316] s3c-i2c 12c90000.i2c: bus frequency set to 65 KHz
[    0.652766] s3c-i2c 12c90000.i2c: i2c-3: S3C I2C adapter
[    0.652845] s3c-i2c 12ce0000.i2c: slave address 0x38
[    0.652864] s3c-i2c 12ce0000.i2c: bus frequency set to 65 KHz
[    0.653298] s3c-i2c 12ce0000.i2c: i2c-8: S3C I2C adapter
[    0.653378] s3c-i2c 121d0000.i2c: slave address 0x38
[    0.653396] s3c-i2c 121d0000.i2c: bus frequency set to 39 KHz
[    0.653832] s3c-i2c 121d0000.i2c: i2c-9: S3C I2C adapter
[    0.655268] Switched to clocksource arch_sys_counter
[    0.668675] NET: Registered protocol family 2
[    0.669130] TCP established hash table entries: 8192 (order: 3, 32768 
bytes)
[    0.669217] TCP bind hash table entries: 8192 (order: 5, 163840 bytes)
[    0.669391] TCP: Hash tables configured (established 8192 bind 8192)
[    0.669445] TCP: reno registered
[    0.669463] UDP hash table entries: 512 (order: 2, 24576 bytes)
[    0.669509] UDP-Lite hash table entries: 512 (order: 2, 24576 bytes)
[    0.669702] NET: Registered protocol family 1
[    0.669893] Trying to unpack rootfs image as initramfs...
[    0.766244] Freeing initrd memory: 2280K (c2001000 - c223b000)
[    0.767913] futex hash table entries: 512 (order: 3, 32768 bytes)
[    0.768229] bounce pool size: 64 pages
[    0.782215] ROMFS MTD (C) 2007 Red Hat, Inc.
[    0.782471] msgmni has been set to 1443
[    0.782988] io scheduler noop registered
[    0.783004] io scheduler deadline registered
[    0.783497] io scheduler cfq registered (default)
[    0.788490] exynos-dp 145b0000.dp-controller: unable to find phy
[    0.788518] platform 145b0000.dp-controller: Driver exynos-dp 
requests probe deferral
[    0.794020] dma-pl330 121a0000.pdma: Loaded driver for PL330 DMAC-2364208
[    0.794042] dma-pl330 121a0000.pdma:         DBUFF-32x4bytes 
Num_Chans-8 Num_Peri-32 Num_Events-32
[    0.798710] dma-pl330 121b0000.pdma: Loaded driver for PL330 DMAC-2364208
[    0.798732] dma-pl330 121b0000.pdma:         DBUFF-32x4bytes 
Num_Chans-8 Num_Peri-32 Num_Events-32
[    0.799988] dma-pl330 10800000.mdma: Loaded driver for PL330 DMAC-2364208
[    0.800009] dma-pl330 10800000.mdma:         DBUFF-64x8bytes 
Num_Chans-8 Num_Peri-1 Num_Events-32
[    0.801290] dma-pl330 11c10000.mdma: Loaded driver for PL330 DMAC-2364208
[    0.801310] dma-pl330 11c10000.mdma:         DBUFF-64x8bytes 
Num_Chans-8 Num_Peri-1 Num_Events-32
[    0.889992] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[    0.892000] 12c00000.serial: ttySAC0 at MMIO 0x12c00000 (irq = 83, 
base_baud = 0) is a S3C6400/10
[    0.892377] 12c10000.serial: ttySAC1 at MMIO 0x12c10000 (irq = 84, 
base_baud = 0) is a S3C6400/10
[    0.892759] 12c20000.serial: ttySAC2 at MMIO 0x12c20000 (irq = 85, 
base_baud = 0) is a S3C6400/10
[    1.670559] console [ttySAC2] enabled
[    1.674585] 12c30000.serial: ttySAC3 at MMIO 0x12c30000 (irq = 86, 
base_baud = 0) is a S3C6400/10
[    1.692699] brd: module loaded
[    1.698718] loop: module loaded
[    1.701256] usbcore: registered new interface driver asix
[    1.705903] usbcore: registered new interface driver ax88179_178a
[    1.711976] usbcore: registered new interface driver cdc_ether
[    1.717787] usbcore: registered new interface driver r815x
[    1.723269] usbcore: registered new interface driver smsc75xx
[    1.729002] usbcore: registered new interface driver smsc95xx
[    1.734708] usbcore: registered new interface driver net1080
[    1.740364] usbcore: registered new interface driver cdc_subset
[    1.746252] usbcore: registered new interface driver zaurus
[    1.751843] usbcore: registered new interface driver cdc_ncm
[    1.758245] dwc3 12000000.dwc3: no usb2 phy configured
[    1.762472] platform 12000000.dwc3: Driver dwc3 requests probe deferral
[    1.769390] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    1.775567] ehci-exynos: EHCI EXYNOS driver
[    1.779837] unable to find transceiver of type USB2 PHY
[    1.784947] exynos-ehci 12110000.usb: no platform data or transceiver 
defined
[    1.792066] platform 12110000.usb: Driver exynos-ehci requests probe 
deferral
[    1.799448] usbcore: registered new interface driver usb-storage
[    1.805626] samsung-usb3phy 12100000.usbphy: Can't get usb-phy sysreg 
cfg register
[    1.813271] mousedev: PS/2 mouse device common for all mice
[    1.818949] s3c-rtc 101e0000.rtc: rtc disabled, re-enabling
[    1.824152] s3c-rtc 101e0000.rtc: rtc core: registered s3c as rtc0
[    1.830003] s3c-rtc 101e0000.rtc: warning: invalid RTC value so 
initializing it
[    1.838186] device-mapper: ioctl: 4.27.0-ioctl (2013-10-30) 
initialised: dm-devel@redhat.com
[    1.845812] sdhci: Secure Digital Host Controller Interface driver
[    1.851862] sdhci: Copyright(c) Pierre Ossman
[    1.856406] Synopsys Designware Multimedia Card Interface Driver
[    1.862711] dwmmc_exynos 12200000.mmc: Using internal DMA controller.
[    1.868623] dwmmc_exynos 12200000.mmc: Version ID is 241a
[    1.874109] dwmmc_exynos 12200000.mmc: DW MMC controller at irq 107, 
32 bit host data width, 128 deep fifo
[    1.910297] dwmmc_exynos 12200000.mmc: 1 slots initialized
[    1.914562] dwmmc_exynos 12220000.mmc: Using internal DMA controller.
[    1.920781] dwmmc_exynos 12220000.mmc: Version ID is 241a
[    1.927261] dwmmc_exynos 12220000.mmc: DW MMC controller at irq 109, 
32 bit host data width, 128 deep fifo
[    1.965297] dwmmc_exynos 12220000.mmc: 1 slots initialized
[    1.971127] usbcore: registered new interface driver usbhid
[    1.975228] usbhid: USB HID core driver
[    1.979226] TCP: cubic registered
[    1.982364] NET: Registered protocol family 17
[    1.986819] NET: Registered protocol family 15
[    1.991283] Registering SWP/SWPB emulation handler
[    2.003036] mmc0: BKOPS_EN bit is not set
[    2.006888] mmc_host mmc0: Bus speed (slot 0) = 50000000Hz (slot req 
52000000Hz, actual 50000000HZ div = 0)
[    2.015394] EXT_28_OFF: disabling
[    2.018807] mmc_host mmc0: Bus speed (slot 0) = 100000000Hz (slot req 
52000000Hz, actual 50000000HZ div = 1)
[    2.028501] mmc0: new high speed DDR MMC card at address 0001
[    2.034499] isa bounce pool size: 16 pages
[    2.038289] mmcblk0: mmc0:0001 M4G1FA 3.72 GiB
[    2.039592] VDD_33ON_2.8V: disabling
[    2.046459] mmcblk0boot0: mmc0:0001 M4G1FA partition 1 1.00 MiB
[    2.046462] exynos-dp 145b0000.dp-controller: unable to find phy
[    2.046485] platform 145b0000.dp-controller: Driver exynos-dp 
requests probe deferral
[    2.066149] mmcblk0boot1: mmc0:0001 M4G1FA partition 2 1.00 MiB
[    2.072039] mmcblk0rpmb: mmc0:0001 M4G1FA partition 3 128 KiB
[    2.079125]  mmcblk0: p1 p2 p3 p4
[    2.083379]  mmcblk0boot1: unknown partition table
[    2.087640]  mmcblk0boot0: unknown partition table
[    2.124893] mmc_host mmc1: Bus speed (slot 0) = 50000000Hz (slot req 
50000000Hz, actual 50000000HZ div = 0)
[    2.133243] mmc1: new high speed SDHC card at address 1234
[    2.139010] mmcblk1: mmc1:1234 SA04G 3.67 GiB
[    2.144781]  mmcblk1: p1 p2 p3
[    2.247302] samsung-usb2phy 12130000.usbphy: Already power on PHY
[    2.251948] unable to find transceiver
[    2.255665] exynos-ehci 12110000.usb: EHCI Host Controller
[    2.261156] exynos-ehci 12110000.usb: new USB bus registered, 
assigned bus number 1
[    2.268838] exynos-ehci 12110000.usb: irq 103, io mem 0x12110000
[    2.280294] exynos-ehci 12110000.usb: USB 2.0 started, EHCI 1.00
[    2.285642] hub 1-0:1.0: USB hub found
[    2.288583] hub 1-0:1.0: 3 ports detected
[    2.292965] exynos-dp 145b0000.dp-controller: unable to find phy
[    2.298569] platform 145b0000.dp-controller: Driver exynos-dp 
requests probe deferral
[    2.307380] input: gpio_keys.4 as /devices/gpio_keys.4/input/input0
[    2.313083] s3c-rtc 101e0000.rtc: setting system clock to 2000-01-01 
00:00:01 UTC (946684801)
[    2.321189] exynos-dp 145b0000.dp-controller: unable to find phy
[    2.327125] platform 145b0000.dp-controller: Driver exynos-dp 
requests probe deferral
[    2.335530] Freeing unused kernel memory: 224K (c04bf000 - c04f7000)
[    2.380582] systemd-udevd[1257]: starting version 204
[    2.786139] EXT4-fs (mmcblk1p3): mounted filesystem with ordered data 
mode. Opts: (null)
[    3.542945] random: nonblocking pool is initialized
[    3.546909] EXT4-fs (mmcblk1p3): re-mounted. Opts: data=ordered
[   10.848487] Unable to handle kernel paging request at virtual address 
410fc0f4
[   12.070655] pgd = c0004000
[   12.073340] [410fc0f4] *pgd=00000000
[   12.076901] Internal error: Oops: 80000005 [#1] PREEMPT SMP ARM
[   12.082802] Modules linked in:
[   12.085839] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 
3.14.0-rc1-00079-g82cd447 #467
[   12.093571] task: c0502ce8 ti: c04f8000 task.ti: c04f8000
[   12.098948] PC is at 0x410fc0f4
[   12.102076] LR is at cpu_init+0x28/0x70
[   12.105892] pc : [<410fc0f4>]    lr : [<c0010428>]    psr: 800001d3
[   12.105892] sp : c04f9f48  ip : 00000000  fp : ee7c1158
[   12.117356] r10: c05311d9  r9 : 410fc0f4  r8 : ee7c1158
[   12.122557] r7 : c05046fc  r6 : ed830c40  r5 : c0019cd0  r4 : 00000000
[   12.129068] r3 : 2e2cc000  r2 : 405316c0  r1 : 6e0c006a  r0 : 00000000
[   12.135579] Flags: Nzcv  IRQs off  FIQs off  Mode SVC_32  ISA ARM 
Segment kernel
[   12.143047] Control: 10c5387d  Table: 6e0c006a  DAC: 00000015
[   12.148772] Process swapper/0 (pid: 0, stack limit = 0xc04f8240)
[   12.154761] Stack: (0xc04f9f48 to 0xc04fa000)
[   12.159101] 9f40:                   00000000 00000000 00000018 
c04f9f68 c02c52c4 c02a9c50
[   12.167265] 9f60: 60000013 ffffffff dabfc321 00000000 ee7c1690 
ee7c1158 c056bcbc ee7c1158
[   12.175425] 9f80: c04f68c0 c04f68c0 00000000 c04f8000 c0500494 
c0380aac c05311d9 00000001
[   12.183584] 9fa0: 410fc0f4 c05311d9 c04f9fb4 c037a454 00000000 
c00588c4 c04e1b78 c04bfb08
[   12.191743] 9fc0: ffffffff ffffffff c04bf57c 00000000 00000000 
c04e1b78 00000000 10c5387d
[   12.199902] 9fe0: c050040c c04e1b74 c0503d44 4000406a 00000000 
40008074 00000000 00000000
[   12.208067] [<c0010428>] (cpu_init) from [<00000000>] (  (null))
[   12.214046] Code: bad PC value
[   12.217083] ---[ end trace 6b959f570500b802 ]---
[   12.221683] Kernel panic - not syncing: Attempted to kill the idle task!
[   13.316370] SMP: failed to stop secondary CPUs




> On Tue, Apr 8, 2014 at 4:31 PM, Tomasz Figa <t.figa@samsung.com> wrote:
>> Hi Daniel,
>>
>>
>> On 04.04.2014 15:06, Daniel Lezcano wrote:
>>>
>>>
>>> Hi,
>>>
>>> I tried to make the idle AFTR state working on arndale 5250 but that
>>> leads to a kernel reboot and crash.
>>>
>>> How to reproduce ?
>>>
>>> echo 0 > /sys/devices/system/cpu/cpu1/online
>>>
>>> Reproductible on v3.14 and samsung/for-next
>>>
>>> Any ideas ?
>>
>>
>> Added some people that I know that have been working with Arndale.
>>
>> Best regards,
>> Tomasz
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc"
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>> the body of a message to majordomo@vger.kernel.org
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Re: AFTR does not work on arndale 5250

[Tomasz Figa]

Hi Daniel, Vikas, Chander,

On 08.04.2014 16:27, Daniel Lezcano wrote:
> On 04/08/2014 03:32 PM, Vikas Sajjan wrote:
>>   Hi Daniel,
>>
>>   I checked AFTR on v3.14 (
>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/log/?id=refs/tags/v3.14)
>>
>>   on exynos5250 based chromebook (exynos5250-snow.dtb)
>>
>> I am able to hotplug CPU1  (echo 0 >
>> /sys/devices/system/cpu/cpu1/online).
>> I can see, it enters exynos4_enter_core0_aftr() when I hotplug CPU1.
>
> Hi,
>
> thanks a lot for your help.
>
> I reproduced it on my arndale board with linux-samsung/for-next and on
> v3.14.
>
> Used the exynos_defconfig, enabled cpuidle and used exynos5250-arndale.dtb.
>

You should compare your bootloader versions as this is one of the 
aspects that can break AFTR support as it relies on kind of ABI between 
bootloader and kernel.

Bets regards,
Tomasz

Re: AFTR does not work on arndale 5250

[Daniel Lezcano]

On 04/08/2014 06:13 PM, Tomasz Figa wrote:
> Hi Daniel, Vikas, Chander,
>
> On 08.04.2014 16:27, Daniel Lezcano wrote:
>> On 04/08/2014 03:32 PM, Vikas Sajjan wrote:
>>>   Hi Daniel,
>>>
>>>   I checked AFTR on v3.14 (
>>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/log/?id=refs/tags/v3.14)
>>>
>>>
>>>   on exynos5250 based chromebook (exynos5250-snow.dtb)
>>>
>>> I am able to hotplug CPU1  (echo 0 >
>>> /sys/devices/system/cpu/cpu1/online).
>>> I can see, it enters exynos4_enter_core0_aftr() when I hotplug CPU1.
>>
>> Hi,
>>
>> thanks a lot for your help.
>>
>> I reproduced it on my arndale board with linux-samsung/for-next and on
>> v3.14.
>>
>> Used the exynos_defconfig, enabled cpuidle and used
>> exynos5250-arndale.dtb.
>>
>
> You should compare your bootloader versions as this is one of the
> aspects that can break AFTR support as it relies on kind of ABI between
> bootloader and kernel.

U-Boot 2013.01.-rc1 (Jul 10 2013 - 15:16:09) for ARNDALE5250
gcc-4.7 (Ubuntu/Linaro 4.7.3-1ubuntu1) 4.7.3
GNU ld (GNU Binutils for Ubuntu) 2.23.2



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