| Message ID | 1417186209-5256-2-git-send-email-a.kesavan@samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On pi?, 2014-11-28 at 20:20 +0530, Abhilash Kesavan wrote: > The arndale-octa board was giving "imprecise external aborts" during > boot-up with MCPM enabled. CCI enablement of the boot cluster was found > to be the cause of these aborts (possibly because the secure f/w was not > allowing it). Hence, disable CCI for the arndale-octa board. > > Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com> > --- > arch/arm/boot/dts/exynos5420-arndale-octa.dts | 4 ++++ > arch/arm/boot/dts/exynos5420.dtsi | 2 +- > 2 files changed, 5 insertions(+), 1 deletion(-) I tested these 2 patches on Arndale Octa but there are no improvements. I still got imprecise aborts (some not fatal and sometimes killing init with full backtrace). Tested on next-20141128. System booted from microSD (bootloader from Linaro Ubuntu Saucy server image): ================================== U-Boot 2012.07 (Feb 15 2014 - 17:29:55) for ARNDALE OCTA CPU: Exynos5420 Rev2.0 [Samsung SOC on SMP Platform Base on ARM CortexA15] APLL = 800MHz, KPLL = 600MHz MPLL = 532MHz, BPLL = 800MHz Board: ARNDALE OCTA DRAM: 2 GiB WARNING: Caches not enabled TrustZone Enabled BSP BL1 version: Checking Boot Mode ... SDMMC MMC: S5P_MSHC2: 0, S5P_MSHC0: 1 MMC Device 0: 29.3 GiB MMC Device 1: 7.3 GiB MMC Device 2: MMC Device 2 not found there are pending interrupts 0x00000001 In: serial Out: serial Err: serial Net: No ethernet found. (Re)start USB... USB: Register 1313 NbrPorts 3 USB EHCI 1.00 scanning bus for devices... The request port(2) is not configured The request port(2) is not configured 3 USB Device(s) found scanning bus for storage devices... 0 Storage Device(s) found scanning usb for ethernet devices... 1 Ethernet Device(s) found Hit any key to stop autoboot: 0 ARNDALE # uTTY Unknown command 'uTTY' - try 'help' ARNDALE # run nn reading uImage 3674704 bytes read reading uInitrd 2330480 bytes read reading board.dtb 33680 bytes read ## Booting kernel from Legacy Image at 20007000 ... Image Name: Linux-exynos5420-arndale-octa Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 3674640 Bytes = 3.5 MiB Load Address: 41008000 Entry Point: 41008000 Verifying Checksum ... OK ## Loading init Ramdisk from Legacy Image at 22000000 ... Image Name: initramfs Image Type: ARM Linux RAMDisk Image (uncompressed) Data Size: 2330416 Bytes = 2.2 MiB Load Address: 00000000 Entry Point: 00000000 Verifying Checksum ... OK ## Flattened Device Tree blob at 21f00000 Booting using the fdt blob at 0x21f00000 Loading Kernel Image ... OK OK Using Device Tree in place at 21f00000, end 21f0b38f Starting kernel ... [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Linux version 3.18.0-rc6-next-20141128-00007-g33b7bf7da133 (k.kozlowski@AMDC1943) (gcc version 4.7.3 (Ubuntu/Linaro 4.7.3-12ubuntu1) ) #24 SMP PREEMPT Fri Nov 28 16:13:43 CET 2014 [ 0.000000] CPU: ARMv7 Processor [412fc0f3] revision 3 (ARMv7), cr=10c5387d ... [ 12.874514] VFS: Mounted root (ext4 filesystem) readonly on device 179:67. [ 12.887392] devtmpfs: mounted [ 12.889321] Freeing unused kernel memory: 324K (c0669000 - c06ba000) [ 12.951241] Unhandled fault: imprecise external abort (0x406) at 0x00000000 [ 12.966312] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000007 [ 12.966312] [ 12.973980] CPU: 0 PID: 1 Comm: bash Tainted: G W 3.18.0-rc6-next-20141128-00007-g33b7bf7da133 #24 [ 12.983938] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [ 12.990014] [<c0014d44>] (unwind_backtrace) from [<c0011c88>] (show_stack+0x10/0x14) [ 12.997723] [<c0011c88>] (show_stack) from [<c048e82c>] (dump_stack+0x70/0xbc) [ 13.004911] [<c048e82c>] (dump_stack) from [<c048a8c0>] (panic+0x94/0x20c) [ 13.011753] [<c048a8c0>] (panic) from [<c0026500>] (do_exit+0x944/0x988) [ 13.018424] [<c0026500>] (do_exit) from [<c00265f4>] (do_group_exit+0x3c/0xbc) [ 13.025621] [<c00265f4>] (do_group_exit) from [<c0030d60>] (get_signal+0x218/0x8c4) [ 13.033247] [<c0030d60>] (get_signal) from [<c048a39c>] (do_signal+0x84/0x350) [ 13.040438] [<c048a39c>] (do_signal) from [<c00115ec>] (do_work_pending+0xbc/0xcc) [ 13.047979] [<c00115ec>] (do_work_pending) from [<c000f1f8>] (work_pending+0xc/0x20) [ 13.055693] CPU1: stopping [ 13.058385] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G W 3.18.0-rc6-next-20141128-00007-g33b7bf7da133 #24 [ 13.068790] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [ 13.074858] [<c0014d44>] (unwind_backtrace) from [<c0011c88>] (show_stack+0x10/0x14) [ 13.082573] [<c0011c88>] (show_stack) from [<c048e82c>] (dump_stack+0x70/0xbc) [ 13.089762] [<c048e82c>] (dump_stack) from [<c0013e14>] (handle_IPI+0x158/0x18c) [ 13.097128] [<c0013e14>] (handle_IPI) from [<c00086f4>] (gic_handle_irq+0x60/0x68) [ 13.104669] [<c00086f4>] (gic_handle_irq) from [<c00127c4>] (__irq_svc+0x44/0x7c) [ 13.112112] Exception stack(0xee4c3fa0 to 0xee4c3fe8) [ 13.117135] 3fa0: c000fd7c ee4c3fe8 ee4c3ff0 00000000 c06c24e8 c04997e0 c06fa60a c06fa60a [ 13.125287] 3fc0: 00000001 412fc0f3 00000000 00000000 00000001 ee4c3fe8 c000fd7c c000fd80 [ 13.133429] 3fe0: 60000013 ffffffff [ 13.136895] [<c00127c4>] (__irq_svc) from [<c000fd80>] (arch_cpu_idle+0x20/0x3c) [ 13.144272] [<c000fd80>] (arch_cpu_idle) from [<c0059d0c>] (cpu_startup_entry+0x11c/0x1a0) [ 13.152499] [<c0059d0c>] (cpu_startup_entry) from [<40008784>] (0x40008784) [ 13.159424] CPU2: stopping [ 13.162102] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G W 3.18.0-rc6-next-20141128-00007-g33b7bf7da133 #24 [ 13.172508] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [ 13.178577] [<c0014d44>] (unwind_backtrace) from [<c0011c88>] (show_stack+0x10/0x14) [ 13.186291] [<c0011c88>] (show_stack) from [<c048e82c>] (dump_stack+0x70/0xbc) [ 13.193479] [<c048e82c>] (dump_stack) from [<c0013e14>] (handle_IPI+0x158/0x18c) [ 13.200845] [<c0013e14>] (handle_IPI) from [<c00086f4>] (gic_handle_irq+0x60/0x68) [ 13.208386] [<c00086f4>] (gic_handle_irq) from [<c00127c4>] (__irq_svc+0x44/0x7c) [ 13.215833] Exception stack(0xee4c5fa0 to 0xee4c5fe8) [ 13.220854] 5fa0: c000fd7c ee4c5fe8 ee4c5ff0 00000000 c06c24e8 c04997e0 c06fa60a c06fa60a [ 13.229006] 5fc0: 00000001 412fc0f3 00000000 00000000 00000001 ee4c5fe8 c000fd7c c000fd80 [ 13.237149] 5fe0: 60000113 ffffffff [ 13.240612] [<c00127c4>] (__irq_svc) from [<c000fd80>] (arch_cpu_idle+0x20/0x3c) [ 13.247986] [<c000fd80>] (arch_cpu_idle) from [<c0059d0c>] (cpu_startup_entry+0x11c/0x1a0) [ 13.256218] [<c0059d0c>] (cpu_startup_entry) from [<40008784>] (0x40008784) [ 13.263144] CPU3: stopping [ 13.265823] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G W 3.18.0-rc6-next-20141128-00007-g33b7bf7da133 #24 [ 13.276230] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [ 13.282300] [<c0014d44>] (unwind_backtrace) from [<c0011c88>] (show_stack+0x10/0x14) [ 13.290012] [<c0011c88>] (show_stack) from [<c048e82c>] (dump_stack+0x70/0xbc) [ 13.297200] [<c048e82c>] (dump_stack) from [<c0013e14>] (handle_IPI+0x158/0x18c) [ 13.304565] [<c0013e14>] (handle_IPI) from [<c00086f4>] (gic_handle_irq+0x60/0x68) [ 13.312108] [<c00086f4>] (gic_handle_irq) from [<c00127c4>] (__irq_svc+0x44/0x7c) [ 13.319553] Exception stack(0xee4c7fa0 to 0xee4c7fe8) [ 13.324576] 7fa0: c000fd7c ee4c7fe8 ee4c7ff0 00000000 c06c24e8 c04997e0 c06fa60a c06fa60a [ 13.332727] 7fc0: 00000001 412fc0f3 00000000 00000000 00000001 ee4c7fe8 c000fd7c c000fd80 [ 13.340870] 7fe0: 60000113 ffffffff [ 13.344335] [<c00127c4>] (__irq_svc) from [<c000fd80>] (arch_cpu_idle+0x20/0x3c) [ 13.351710] [<c000fd80>] (arch_cpu_idle) from [<c0059d0c>] (cpu_startup_entry+0x11c/0x1a0) [ 13.359939] [<c0059d0c>] (cpu_startup_entry) from [<40008784>] (0x40008784) [ 13.366878] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000007 [ 13.366878] ================================== Best regards, Krzysztof > diff --git a/arch/arm/boot/dts/exynos5420-arndale-octa.dts b/arch/arm/boot/dts/exynos5420-arndale-octa.dts > index aa7a7d7..db2c1c4 100644 > --- a/arch/arm/boot/dts/exynos5420-arndale-octa.dts > +++ b/arch/arm/boot/dts/exynos5420-arndale-octa.dts > @@ -372,3 +372,7 @@ > &usbdrd_dwc3_1 { > dr_mode = "host"; > }; > + > +&cci { > + status = "disabled"; > +}; > diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi > index 517e50f..0a82ae7 100644 > --- a/arch/arm/boot/dts/exynos5420.dtsi > +++ b/arch/arm/boot/dts/exynos5420.dtsi > @@ -120,7 +120,7 @@ > }; > }; > > - cci@10d20000 { > + cci: cci@10d20000 { > compatible = "arm,cci-400"; > #address-cells = <1>; > #size-cells = <1>;
Hello Krzysztof, On Fri, Nov 28, 2014 at 8:49 PM, Krzysztof Kozlowski <k.kozlowski@samsung.com> wrote: > On pi?, 2014-11-28 at 20:20 +0530, Abhilash Kesavan wrote: >> The arndale-octa board was giving "imprecise external aborts" during >> boot-up with MCPM enabled. CCI enablement of the boot cluster was found >> to be the cause of these aborts (possibly because the secure f/w was not >> allowing it). Hence, disable CCI for the arndale-octa board. >> >> Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com> >> --- >> arch/arm/boot/dts/exynos5420-arndale-octa.dts | 4 ++++ >> arch/arm/boot/dts/exynos5420.dtsi | 2 +- >> 2 files changed, 5 insertions(+), 1 deletion(-) > > I tested these 2 patches on Arndale Octa but there are no improvements. > I still got imprecise aborts (some not fatal and sometimes killing init > with full backtrace). Thanks for testing. Are you testing this with exynos_defconfig with no other changes ? Can you please confirm from the bootlog that MCPM and CCI are not being initialized. Can you remove these 2 patches and on linux-next check if you are getting aborts even with 5420_MCPM disabled. Regards, Abhilash > > Tested on next-20141128. System booted from microSD (bootloader from > Linaro Ubuntu Saucy server image): > > ================================== > U-Boot 2012.07 (Feb 15 2014 - 17:29:55) for ARNDALE OCTA > > CPU: Exynos5420 Rev2.0 [Samsung SOC on SMP Platform Base on ARM CortexA15] > APLL = 800MHz, KPLL = 600MHz > MPLL = 532MHz, BPLL = 800MHz > > Board: ARNDALE OCTA > DRAM: 2 GiB > WARNING: Caches not enabled > > TrustZone Enabled BSP > BL1 version: > > Checking Boot Mode ... SDMMC > MMC: S5P_MSHC2: 0, S5P_MSHC0: 1 > MMC Device 0: 29.3 GiB > MMC Device 1: 7.3 GiB > MMC Device 2: MMC Device 2 not found > there are pending interrupts 0x00000001 > In: serial > Out: serial > Err: serial > Net: No ethernet found. > (Re)start USB... > USB: Register 1313 NbrPorts 3 > USB EHCI 1.00 > scanning bus for devices... The request port(2) is not configured > The request port(2) is not configured > 3 USB Device(s) found > scanning bus for storage devices... 0 Storage Device(s) found > scanning usb for ethernet devices... 1 Ethernet Device(s) found > Hit any key to stop autoboot: 0 > ARNDALE # uTTY > Unknown command 'uTTY' - try 'help' > ARNDALE # run nn > reading uImage > > 3674704 bytes read > reading uInitrd > > 2330480 bytes read > reading board.dtb > > 33680 bytes read > ## Booting kernel from Legacy Image at 20007000 ... > Image Name: Linux-exynos5420-arndale-octa > Image Type: ARM Linux Kernel Image (uncompressed) > Data Size: 3674640 Bytes = 3.5 MiB > Load Address: 41008000 > Entry Point: 41008000 > Verifying Checksum ... OK > ## Loading init Ramdisk from Legacy Image at 22000000 ... > Image Name: initramfs > Image Type: ARM Linux RAMDisk Image (uncompressed) > Data Size: 2330416 Bytes = 2.2 MiB > Load Address: 00000000 > Entry Point: 00000000 > Verifying Checksum ... OK > ## Flattened Device Tree blob at 21f00000 > Booting using the fdt blob at 0x21f00000 > Loading Kernel Image ... OK > OK > Using Device Tree in place at 21f00000, end 21f0b38f > > Starting kernel ... > > [ 0.000000] Booting Linux on physical CPU 0x0 > [ 0.000000] Linux version 3.18.0-rc6-next-20141128-00007-g33b7bf7da133 (k.kozlowski@AMDC1943) (gcc version 4.7.3 (Ubuntu/Linaro 4.7.3-12ubuntu1) ) #24 SMP PREEMPT Fri Nov 28 16:13:43 CET 2014 > [ 0.000000] CPU: ARMv7 Processor [412fc0f3] revision 3 (ARMv7), cr=10c5387d > > ... > [ 12.874514] VFS: Mounted root (ext4 filesystem) readonly on device 179:67. > [ 12.887392] devtmpfs: mounted > [ 12.889321] Freeing unused kernel memory: 324K (c0669000 - c06ba000) > [ 12.951241] Unhandled fault: imprecise external abort (0x406) at 0x00000000 > [ 12.966312] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000007 > [ 12.966312] > [ 12.973980] CPU: 0 PID: 1 Comm: bash Tainted: G W 3.18.0-rc6-next-20141128-00007-g33b7bf7da133 #24 > [ 12.983938] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) > [ 12.990014] [<c0014d44>] (unwind_backtrace) from [<c0011c88>] (show_stack+0x10/0x14) > [ 12.997723] [<c0011c88>] (show_stack) from [<c048e82c>] (dump_stack+0x70/0xbc) > [ 13.004911] [<c048e82c>] (dump_stack) from [<c048a8c0>] (panic+0x94/0x20c) > [ 13.011753] [<c048a8c0>] (panic) from [<c0026500>] (do_exit+0x944/0x988) > [ 13.018424] [<c0026500>] (do_exit) from [<c00265f4>] (do_group_exit+0x3c/0xbc) > [ 13.025621] [<c00265f4>] (do_group_exit) from [<c0030d60>] (get_signal+0x218/0x8c4) > [ 13.033247] [<c0030d60>] (get_signal) from [<c048a39c>] (do_signal+0x84/0x350) > [ 13.040438] [<c048a39c>] (do_signal) from [<c00115ec>] (do_work_pending+0xbc/0xcc) > [ 13.047979] [<c00115ec>] (do_work_pending) from [<c000f1f8>] (work_pending+0xc/0x20) > [ 13.055693] CPU1: stopping > [ 13.058385] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G W 3.18.0-rc6-next-20141128-00007-g33b7bf7da133 #24 > [ 13.068790] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) > [ 13.074858] [<c0014d44>] (unwind_backtrace) from [<c0011c88>] (show_stack+0x10/0x14) > [ 13.082573] [<c0011c88>] (show_stack) from [<c048e82c>] (dump_stack+0x70/0xbc) > [ 13.089762] [<c048e82c>] (dump_stack) from [<c0013e14>] (handle_IPI+0x158/0x18c) > [ 13.097128] [<c0013e14>] (handle_IPI) from [<c00086f4>] (gic_handle_irq+0x60/0x68) > [ 13.104669] [<c00086f4>] (gic_handle_irq) from [<c00127c4>] (__irq_svc+0x44/0x7c) > [ 13.112112] Exception stack(0xee4c3fa0 to 0xee4c3fe8) > [ 13.117135] 3fa0: c000fd7c ee4c3fe8 ee4c3ff0 00000000 c06c24e8 c04997e0 c06fa60a c06fa60a > [ 13.125287] 3fc0: 00000001 412fc0f3 00000000 00000000 00000001 ee4c3fe8 c000fd7c c000fd80 > [ 13.133429] 3fe0: 60000013 ffffffff > [ 13.136895] [<c00127c4>] (__irq_svc) from [<c000fd80>] (arch_cpu_idle+0x20/0x3c) > [ 13.144272] [<c000fd80>] (arch_cpu_idle) from [<c0059d0c>] (cpu_startup_entry+0x11c/0x1a0) > [ 13.152499] [<c0059d0c>] (cpu_startup_entry) from [<40008784>] (0x40008784) > [ 13.159424] CPU2: stopping > [ 13.162102] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G W 3.18.0-rc6-next-20141128-00007-g33b7bf7da133 #24 > [ 13.172508] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) > [ 13.178577] [<c0014d44>] (unwind_backtrace) from [<c0011c88>] (show_stack+0x10/0x14) > [ 13.186291] [<c0011c88>] (show_stack) from [<c048e82c>] (dump_stack+0x70/0xbc) > [ 13.193479] [<c048e82c>] (dump_stack) from [<c0013e14>] (handle_IPI+0x158/0x18c) > [ 13.200845] [<c0013e14>] (handle_IPI) from [<c00086f4>] (gic_handle_irq+0x60/0x68) > [ 13.208386] [<c00086f4>] (gic_handle_irq) from [<c00127c4>] (__irq_svc+0x44/0x7c) > [ 13.215833] Exception stack(0xee4c5fa0 to 0xee4c5fe8) > [ 13.220854] 5fa0: c000fd7c ee4c5fe8 ee4c5ff0 00000000 c06c24e8 c04997e0 c06fa60a c06fa60a > [ 13.229006] 5fc0: 00000001 412fc0f3 00000000 00000000 00000001 ee4c5fe8 c000fd7c c000fd80 > [ 13.237149] 5fe0: 60000113 ffffffff > [ 13.240612] [<c00127c4>] (__irq_svc) from [<c000fd80>] (arch_cpu_idle+0x20/0x3c) > [ 13.247986] [<c000fd80>] (arch_cpu_idle) from [<c0059d0c>] (cpu_startup_entry+0x11c/0x1a0) > [ 13.256218] [<c0059d0c>] (cpu_startup_entry) from [<40008784>] (0x40008784) > [ 13.263144] CPU3: stopping > [ 13.265823] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G W 3.18.0-rc6-next-20141128-00007-g33b7bf7da133 #24 > [ 13.276230] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) > [ 13.282300] [<c0014d44>] (unwind_backtrace) from [<c0011c88>] (show_stack+0x10/0x14) > [ 13.290012] [<c0011c88>] (show_stack) from [<c048e82c>] (dump_stack+0x70/0xbc) > [ 13.297200] [<c048e82c>] (dump_stack) from [<c0013e14>] (handle_IPI+0x158/0x18c) > [ 13.304565] [<c0013e14>] (handle_IPI) from [<c00086f4>] (gic_handle_irq+0x60/0x68) > [ 13.312108] [<c00086f4>] (gic_handle_irq) from [<c00127c4>] (__irq_svc+0x44/0x7c) > [ 13.319553] Exception stack(0xee4c7fa0 to 0xee4c7fe8) > [ 13.324576] 7fa0: c000fd7c ee4c7fe8 ee4c7ff0 00000000 c06c24e8 c04997e0 c06fa60a c06fa60a > [ 13.332727] 7fc0: 00000001 412fc0f3 00000000 00000000 00000001 ee4c7fe8 c000fd7c c000fd80 > [ 13.340870] 7fe0: 60000113 ffffffff > [ 13.344335] [<c00127c4>] (__irq_svc) from [<c000fd80>] (arch_cpu_idle+0x20/0x3c) > [ 13.351710] [<c000fd80>] (arch_cpu_idle) from [<c0059d0c>] (cpu_startup_entry+0x11c/0x1a0) > [ 13.359939] [<c0059d0c>] (cpu_startup_entry) from [<40008784>] (0x40008784) > [ 13.366878] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000007 > [ 13.366878] > > ================================== > > Best regards, > Krzysztof > > >> diff --git a/arch/arm/boot/dts/exynos5420-arndale-octa.dts b/arch/arm/boot/dts/exynos5420-arndale-octa.dts >> index aa7a7d7..db2c1c4 100644 >> --- a/arch/arm/boot/dts/exynos5420-arndale-octa.dts >> +++ b/arch/arm/boot/dts/exynos5420-arndale-octa.dts >> @@ -372,3 +372,7 @@ >> &usbdrd_dwc3_1 { >> dr_mode = "host"; >> }; >> + >> +&cci { >> + status = "disabled"; >> +}; >> diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi >> index 517e50f..0a82ae7 100644 >> --- a/arch/arm/boot/dts/exynos5420.dtsi >> +++ b/arch/arm/boot/dts/exynos5420.dtsi >> @@ -120,7 +120,7 @@ >> }; >> }; >> >> - cci@10d20000 { >> + cci: cci@10d20000 { >> compatible = "arm,cci-400"; >> #address-cells = <1>; >> #size-cells = <1>; >
On pi?, 2014-11-28 at 21:09 +0530, Abhilash Kesavan wrote: > Hello Krzysztof, > > On Fri, Nov 28, 2014 at 8:49 PM, Krzysztof Kozlowski > <k.kozlowski@samsung.com> wrote: > > On pi?, 2014-11-28 at 20:20 +0530, Abhilash Kesavan wrote: > >> The arndale-octa board was giving "imprecise external aborts" during > >> boot-up with MCPM enabled. CCI enablement of the boot cluster was found > >> to be the cause of these aborts (possibly because the secure f/w was not > >> allowing it). Hence, disable CCI for the arndale-octa board. > >> > >> Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com> > >> --- > >> arch/arm/boot/dts/exynos5420-arndale-octa.dts | 4 ++++ > >> arch/arm/boot/dts/exynos5420.dtsi | 2 +- > >> 2 files changed, 5 insertions(+), 1 deletion(-) > > > > I tested these 2 patches on Arndale Octa but there are no improvements. > > I still got imprecise aborts (some not fatal and sometimes killing init > > with full backtrace). > > Thanks for testing. Are you testing this with exynos_defconfig with no > other changes ? Can you please confirm from the bootlog that MCPM and > CCI are not being initialized. > That was exynos_defconfig with disabled DRM and enabled some debug, next-20141128. When I tried only exynos_defconfig (with disabled DRM) it worked fine... So the imprecise aborts were caused by one of following debug options: DEBUG_SECTION_MISMATCH DYNAMIC_DEBUG DEBUG_ATOMIC_SLEEP DEBUG_PREEMPT PROVE_LOCKING LOCKUP_DETECTOR DEBUG_LOCK_ALLOC PROVE_RCU DEBUG_RT_MUTEXES DEBUG_MUTEXES DEBUG_SPINLOCK DEBUG_LIST DEBUG_PAGEALLOC SPARSE_RCU_POINTER DEBUG_FS PM_DEBUG PM_ADVANCED_DEBUG GPIO_SYSFS > Can you remove these 2 patches and on linux-next check if you are > getting aborts even with 5420_MCPM disabled. I tried this already and imprecise aborts shown, however with my debugging options above. Overall the patches seems to work properly (although the debugging issue needs to be resolved still), so: On Arndale Octa (Exynos 5420): Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Best regards, Krzysztof
On Mon, Dec 01, 2014 at 10:03:28AM +0100, Krzysztof Kozlowski wrote: > On pi?, 2014-11-28 at 21:09 +0530, Abhilash Kesavan wrote: > > Hello Krzysztof, > > > > On Fri, Nov 28, 2014 at 8:49 PM, Krzysztof Kozlowski > > <k.kozlowski@samsung.com> wrote: > > > On pi?, 2014-11-28 at 20:20 +0530, Abhilash Kesavan wrote: > > >> The arndale-octa board was giving "imprecise external aborts" during > > >> boot-up with MCPM enabled. CCI enablement of the boot cluster was found > > >> to be the cause of these aborts (possibly because the secure f/w was not > > >> allowing it). Hence, disable CCI for the arndale-octa board. > > >> > > >> Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com> > > >> --- > > >> arch/arm/boot/dts/exynos5420-arndale-octa.dts | 4 ++++ > > >> arch/arm/boot/dts/exynos5420.dtsi | 2 +- > > >> 2 files changed, 5 insertions(+), 1 deletion(-) > > > > > > I tested these 2 patches on Arndale Octa but there are no improvements. > > > I still got imprecise aborts (some not fatal and sometimes killing init > > > with full backtrace). > > > > Thanks for testing. Are you testing this with exynos_defconfig with no > > other changes ? Can you please confirm from the bootlog that MCPM and > > CCI are not being initialized. > > > That was exynos_defconfig with disabled DRM and enabled some debug, > next-20141128. > > When I tried only exynos_defconfig (with disabled DRM) it worked fine... > So the imprecise aborts were caused by one of following debug options: > > DEBUG_SECTION_MISMATCH > DYNAMIC_DEBUG > DEBUG_ATOMIC_SLEEP > DEBUG_PREEMPT > PROVE_LOCKING > LOCKUP_DETECTOR > DEBUG_LOCK_ALLOC > PROVE_RCU > DEBUG_RT_MUTEXES > DEBUG_MUTEXES > DEBUG_SPINLOCK > DEBUG_LIST > DEBUG_PAGEALLOC > SPARSE_RCU_POINTER > DEBUG_FS > PM_DEBUG > PM_ADVANCED_DEBUG > GPIO_SYSFS > > > Can you remove these 2 patches and on linux-next check if you are > > getting aborts even with 5420_MCPM disabled. > > I tried this already and imprecise aborts shown, however with my > debugging options above. > > Overall the patches seems to work properly (although the debugging issue > needs to be resolved still), so: > > On Arndale Octa (Exynos 5420): > Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Reading this message, it seems that this should *not* be given a tested-by, because it seems from what you've reported above, they don't work correctly. If you have to turn debugging options off in order to get the kernel to apparently run correctly after applying some patches, it means those patches themselves are probably buggy, rather than the debug itself being buggy. I'd suggest that you have some further work to do (a manual bisect of the config options you've disabled) to discover which is the cause of the problem. It could be that the code introduces something like a use-after-free bug.
On pon, 2014-12-01 at 11:09 +0000, Russell King - ARM Linux wrote: > On Mon, Dec 01, 2014 at 10:03:28AM +0100, Krzysztof Kozlowski wrote: > > On pi?, 2014-11-28 at 21:09 +0530, Abhilash Kesavan wrote: > > > Hello Krzysztof, > > > > > > On Fri, Nov 28, 2014 at 8:49 PM, Krzysztof Kozlowski > > > <k.kozlowski@samsung.com> wrote: > > > > On pi?, 2014-11-28 at 20:20 +0530, Abhilash Kesavan wrote: > > > >> The arndale-octa board was giving "imprecise external aborts" during > > > >> boot-up with MCPM enabled. CCI enablement of the boot cluster was found > > > >> to be the cause of these aborts (possibly because the secure f/w was not > > > >> allowing it). Hence, disable CCI for the arndale-octa board. > > > >> > > > >> Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com> > > > >> --- > > > >> arch/arm/boot/dts/exynos5420-arndale-octa.dts | 4 ++++ > > > >> arch/arm/boot/dts/exynos5420.dtsi | 2 +- > > > >> 2 files changed, 5 insertions(+), 1 deletion(-) > > > > > > > > I tested these 2 patches on Arndale Octa but there are no improvements. > > > > I still got imprecise aborts (some not fatal and sometimes killing init > > > > with full backtrace). > > > > > > Thanks for testing. Are you testing this with exynos_defconfig with no > > > other changes ? Can you please confirm from the bootlog that MCPM and > > > CCI are not being initialized. > > > > > That was exynos_defconfig with disabled DRM and enabled some debug, > > next-20141128. > > > > When I tried only exynos_defconfig (with disabled DRM) it worked fine... > > So the imprecise aborts were caused by one of following debug options: > > > > DEBUG_SECTION_MISMATCH > > DYNAMIC_DEBUG > > DEBUG_ATOMIC_SLEEP > > DEBUG_PREEMPT > > PROVE_LOCKING > > LOCKUP_DETECTOR > > DEBUG_LOCK_ALLOC > > PROVE_RCU > > DEBUG_RT_MUTEXES > > DEBUG_MUTEXES > > DEBUG_SPINLOCK > > DEBUG_LIST > > DEBUG_PAGEALLOC > > SPARSE_RCU_POINTER > > DEBUG_FS > > PM_DEBUG > > PM_ADVANCED_DEBUG > > GPIO_SYSFS > > > > > Can you remove these 2 patches and on linux-next check if you are > > > getting aborts even with 5420_MCPM disabled. > > > > I tried this already and imprecise aborts shown, however with my > > debugging options above. > > > > Overall the patches seems to work properly (although the debugging issue > > needs to be resolved still), so: > > > > On Arndale Octa (Exynos 5420): > > Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> > > Reading this message, it seems that this should *not* be given a tested-by, > because it seems from what you've reported above, they don't work correctly. > > If you have to turn debugging options off in order to get the kernel to > apparently run correctly after applying some patches, it means those > patches themselves are probably buggy, rather than the debug itself > being buggy. > > I'd suggest that you have some further work to do (a manual bisect of the > config options you've disabled) to discover which is the cause of the > problem. > > It could be that the code introduces something like a use-after-free bug. Maybe I was to eager to add Tested-by but (without debugging options) one imprecise-abort disappears with the patchset. Other issues seem not to be fixed. Best regards, Krzysztof
Abhilash Kesavan <a.kesavan@samsung.com> writes: > The arndale-octa board was giving "imprecise external aborts" during > boot-up with MCPM enabled. CCI enablement of the boot cluster was found > to be the cause of these aborts (possibly because the secure f/w was not > allowing it). Hence, disable CCI for the arndale-octa board. > > Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com> Tested-by: Kevin Hilman <khilman@linaro.org> Tested on top of next-20141128 with exynos_defconfig on my Octa board and I'm not seeing the imprecise aborts anymore. Thanks, Kevin
On 1 December 2014 at 10:50, Kevin Hilman <khilman@kernel.org> wrote: > Abhilash Kesavan <a.kesavan@samsung.com> writes: > >> The arndale-octa board was giving "imprecise external aborts" during >> boot-up with MCPM enabled. CCI enablement of the boot cluster was found >> to be the cause of these aborts (possibly because the secure f/w was not >> allowing it). Hence, disable CCI for the arndale-octa board. >> >> Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com> > > Tested-by: Kevin Hilman <khilman@linaro.org> > > Tested on top of next-20141128 with exynos_defconfig on my Octa board > and I'm not seeing the imprecise aborts anymore. > > Thanks, > > Kevin > -- > 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 Tested-by: Tyler Baker <tyler.baker@linaro.org> Tested on top of mainline/master with exynos_defconfig on my arndale-octa board. One hundred boots attempted with no imprecise aborts. Cheers,
diff --git a/arch/arm/boot/dts/exynos5420-arndale-octa.dts b/arch/arm/boot/dts/exynos5420-arndale-octa.dts index aa7a7d7..db2c1c4 100644 --- a/arch/arm/boot/dts/exynos5420-arndale-octa.dts +++ b/arch/arm/boot/dts/exynos5420-arndale-octa.dts @@ -372,3 +372,7 @@ &usbdrd_dwc3_1 { dr_mode = "host"; }; + +&cci { + status = "disabled"; +}; diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi index 517e50f..0a82ae7 100644 --- a/arch/arm/boot/dts/exynos5420.dtsi +++ b/arch/arm/boot/dts/exynos5420.dtsi @@ -120,7 +120,7 @@ }; }; - cci@10d20000 { + cci: cci@10d20000 { compatible = "arm,cci-400"; #address-cells = <1>; #size-cells = <1>;
The arndale-octa board was giving "imprecise external aborts" during boot-up with MCPM enabled. CCI enablement of the boot cluster was found to be the cause of these aborts (possibly because the secure f/w was not allowing it). Hence, disable CCI for the arndale-octa board. Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com> --- arch/arm/boot/dts/exynos5420-arndale-octa.dts | 4 ++++ arch/arm/boot/dts/exynos5420.dtsi | 2 +- 2 files changed, 5 insertions(+), 1 deletion(-)