Hi Kevin,

I had noticed a similar issue where only 6 cores would come up during development on 5420. This was because there was a check in our u-boot secondary boot-up path which would put a core into WFI if a flag was not present and hence fail to boot. I wonder if it is the same situation in your case too. Is the u-boot for odroid-xu3 publically available or can you check if there is any such code present in your secondary bring-up path.

Regards, Abhilash ------- Original Message ------- Sender : Kevin Hilmankhilman@linaro.org Date : Oct 09, 2014 00:28 (GMT+05:30) Title : exynos5422-odroid-xu3: MCPM: only 6 of 8 CPUs coming online

Hi Chander, Abhilash,

I'm using the exynos5422 odroid-xu3 and only 6 of 8 cores are coming online when using MCPM[1]. All the A15s are booting but only 2 of the A7s, one of which is the primary CPU.

After booting, if I try to manually bring one of the CPUs online via /sys/devices/.../cpuX/online, I hit the BUG() in mcpm-exynos.c:exynos_power_up().

Any ideas why 2 of the A7s aren't booting up?

Kevin

[1] [ 0.001719] CPU: Testing write buffer coherency: ok [ 0.002171] CPU0: update cpu_capacity 448 [ 0.002187] CPU0: thread -1, cpu 0, socket 1, mpidr 80000100 [ 0.002429] Setting up static identity map for 0x4046df70 - 0x4046dfc8 [ 0.002732] ARM CCI driver probed [ 0.002815] exynos_mcpm_usage_count_init: cpu 0 cluster 1 [ 0.003010] Exynos MCPM support installed [ 0.030310] mcpm_boot_secondary: logical CPU 1 is physical CPU 0 cluster 0 [ 0.030326] exynos_power_up: cpu 0 cluster 0 [ 0.030626] CPU1: Booted secondary processor [ 0.030686] CPU1: update cpu_capacity 1535 [ 0.030693] CPU1: thread -1, cpu 0, socket 0, mpidr 80000000 [ 0.040314] mcpm_boot_secondary: logical CPU 2 is physical CPU 1 cluster 0 [ 0.040340] exynos_power_up: cpu 1 cluster 0 [ 0.040629] CPU2: Booted secondary processor [ 0.040672] CPU2: update cpu_capacity 1535 [ 0.040679] CPU2: thread -1, cpu 1, socket 0, mpidr 80000001 [ 0.050321] mcpm_boot_secondary: logical CPU 3 is physical CPU 2 cluster 0 [ 0.050347] exynos_power_up: cpu 2 cluster 0 [ 0.050659] CPU3: Booted secondary processor [ 0.050703] CPU3: update cpu_capacity 1535 [ 0.050710] CPU3: thread -1, cpu 2, socket 0, mpidr 80000002 [ 0.060316] mcpm_boot_secondary: logical CPU 4 is physical CPU 3 cluster 0 [ 0.060343] exynos_power_up: cpu 3 cluster 0 [ 0.060631] CPU4: Booted secondary processor [ 0.060675] CPU4: update cpu_capacity 1535 [ 0.060682] CPU4: thread -1, cpu 3, socket 0, mpidr 80000003 [ 0.070316] mcpm_boot_secondary: logical CPU 5 is physical CPU 1 cluster 1 [ 0.070343] exynos_power_up: cpu 1 cluster 1 [ 1.070007] CPU5: failed to come online [ 1.080322] mcpm_boot_secondary: logical CPU 6 is physical CPU 2 cluster 1 [ 1.080337] exynos_power_up: cpu 2 cluster 1 [ 1.080625] CPU6: Booted secondary processor [ 1.080691] CPU6: update cpu_capacity 448 [ 1.080699] CPU6: thread -1, cpu 2, socket 1, mpidr 80000102 [ 1.090331] mcpm_boot_secondary: logical CPU 7 is physical CPU 3 cluster 1 [ 1.090356] exynos_power_up: cpu 3 cluster 1 [ 2.090023] CPU7: failed to come online [ 2.090055] Brought up 6 CPUs [ 2.090067] SMP: Total of 6 processors activated. [ 2.090079] CPU: WARNING: CPU(s) started in wrong/inconsistent modes (primary CPU mode 0x13) [ 2.090089] CPU: This may indicate a broken bootloader or firmware.