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0573b957fc
linux/arch/arm
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Tony Lindgren 0573b957fc ARM: OMAP4+: Prevent CPU1 related hang with kexec 
Kexec booted kernels on omap4 will hang early during the boot if the
booted kernel is different version from the previous kernel.

This is because the previous kernel may have configured low-power mode
using CPU1_WAKEUP_NS_PA_ADDR. In that case it points to the previous
kernel's omap4_secondary_startup(), and CPU1 can be in low power mode
from the previous kernel. When the new kernel configures the CPU1
clockdomain, CPU1 can wake from low power state prematurely during
omap44xx_clockdomains_init() running random code.

Let's fix the issue by configuring CPU1_WAKEUP_NS_PA_ADDR before we
call omap44xx_clockdomains_init(). Note that this is very early during
the init, and we will do proper CPU1 reset during SMP init a bit later
on in omap4_smp_prepare_cpus(). And we need to do this when SMP is
not enabled as the previous kernel may have had it enabled.

Acked-by: Santosh Shilimkar <ssantosh@kernel.org>
Tested-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2016-06-22 22:55:51 -07:00
..
boot Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2016-05-26 22:01:22 -07:00
common Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2016-03-19 16:31:54 -07:00
configs arch/defconfig: remove CONFIG_RESOURCE_COUNTERS 2016-05-23 17:04:14 -07:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-03-17 11:22:54 -07:00
firmware
include - move kvm_stat tool from QEMU repo into tools/kvm/kvm_stat 2016-05-27 13:41:54 -07:00
kernel Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-05-25 17:05:40 -07:00
kvm - move kvm_stat tool from QEMU repo into tools/kvm/kvm_stat 2016-05-27 13:41:54 -07:00
lib
mach-alpine
mach-artpec
mach-asm9260
mach-aspeed arm: Add Aspeed machine 2016-05-09 17:41:14 +09:30
mach-at91 ARM: at91/soc: reference the whole sama5d2 family 2016-03-29 16:34:31 +02:00
mach-axxia
mach-bcm bus: brcmstb_gisb: Rework dependencies 2016-04-18 14:20:30 -07:00
mach-berlin cpufreq: berlin: Use generic platdev driver 2016-04-25 16:18:23 +02:00
mach-clps711x
mach-cns3xxx ARM: SoC cleanups for v4.6 2016-03-20 14:37:22 -07:00
mach-davinci ARM: DT updates for v4.7 2016-05-18 12:48:46 -07:00
mach-digicolor
mach-dove ARM: dove: Remove CLK_IS_ROOT 2016-04-27 13:55:52 +02:00
mach-ebsa110
mach-efm32
mach-ep93xx
mach-exynos ARM: SoC driver updates for v4.7 2016-05-18 13:14:02 -07:00
mach-footbridge
mach-gemini
mach-highbank
mach-hisi
mach-imx ARM: SoC platform updates for v4.7 2016-05-18 12:35:46 -07:00
mach-integrator ARM: integrator: move flash registration to device tree 2016-04-04 10:33:16 +02:00
mach-iop13xx
mach-iop32x
mach-iop33x
mach-ixp4xx This is the bulk of GPIO changes for kernel v4.6: 2016-03-17 21:05:32 -07:00
mach-keystone ARM: provide improved virt_to_idmap() functionality 2016-05-03 11:13:54 +01:00
mach-ks8695 ARM: SoC non-urgent fixes for v4.6 2016-03-20 14:26:57 -07:00
mach-lpc18xx
mach-lpc32xx ARM: lpc32xx: fix NR_IRQS confict 2016-05-24 19:32:46 +00:00
mach-mediatek ARM: SoC driver updates for v4.7 2016-05-18 13:14:02 -07:00
mach-meson
mach-mmp
mach-moxart
mach-mv78xx0 ARM: mv78xx0: Remove CLK_IS_ROOT 2016-04-27 12:42:55 +02:00
mach-mvebu cpufreq: mvebu: Move cpufreq code into drivers/cpufreq/ 2016-04-28 15:22:43 +02:00
mach-mxs
mach-netx ARM: SoC cleanups for v4.6 2016-03-20 14:37:22 -07:00
mach-nomadik
mach-nspire ARM: SoC cleanups for v4.6 2016-03-20 14:37:22 -07:00
mach-omap1 ARM: OMAP1: Fix typo in mtd-xip.h 2016-06-10 04:13:55 -07:00
mach-omap2 ARM: OMAP4+: Prevent CPU1 related hang with kexec 2016-06-22 22:55:51 -07:00
mach-orion5x ARM: orion5x: Remove CLK_IS_ROOT 2016-04-27 13:11:42 +02:00
mach-oxnas ARM: Add new mach-oxnas 2016-04-26 09:50:52 +02:00
mach-picoxcell
mach-prima2 ARM: SoC cleanups for v4.6 2016-03-20 14:37:22 -07:00
mach-pxa ARM: SoC fixes for 4.7 2016-05-24 15:50:58 -07:00
mach-qcom
mach-realview ARM: realview: hide unused 'pmu_device' object 2016-04-04 10:58:47 +02:00
mach-rockchip ARM: SoC cleanups and fixes for v4.7 2016-05-18 12:28:29 -07:00
mach-rpc
mach-s3c24xx ARM: Explicitly apply PWM config extracted from pwm_args 2016-05-17 14:45:08 +02:00
mach-s3c64xx ARM: SoC platform updates for v4.6 2016-03-20 14:57:08 -07:00
mach-s5pv210
mach-sa1100 ARM: sa1100: remove references to the defunct handhelds.org 2016-04-12 12:34:15 -07:00
mach-shmobile ARM: SoC driver updates for v4.7 2016-05-18 13:14:02 -07:00
mach-socfpga * Altera Arria10 L2 cache and On-Chip RAM ECC handling. (Thor Thayer) 2016-05-16 18:44:39 -07:00
mach-spear
mach-sti ARM: STi: Update platform level menuconfig 'help' 2016-04-07 16:32:14 +02:00
mach-stm32
mach-sunxi cpufreq: sunxi: Use generic platdev driver 2016-04-25 16:18:24 +02:00
mach-tango
mach-tegra ARM: SoC driver updates for v4.7 2016-05-18 13:14:02 -07:00
mach-u300
mach-uniphier ARM: SoC platform updates for v4.7 2016-05-18 12:35:46 -07:00
mach-ux500 ARM: SoC cleanups for v4.6 2016-03-20 14:37:22 -07:00
mach-versatile ARM: versatile: move flash registration to the device tree 2016-04-04 10:33:16 +02:00
mach-vexpress ARM: vexpress/mps2: introduce MPS2 platform 2016-04-26 12:50:01 +02:00
mach-vt8500
mach-w90x900 Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2016-03-19 16:31:54 -07:00
mach-zx
mach-zynq cpufreq: zynq: Use generic platdev driver 2016-04-25 16:18:24 +02:00
mm lib/GCD.c: use binary GCD algorithm instead of Euclidean 2016-05-20 17:58:30 -07:00
net
nwfpe
oprofile
plat-iop
plat-omap
plat-orion Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2016-03-19 16:31:54 -07:00
plat-pxa
plat-samsung ARM: EXYNOS: Remove SROM related register settings from mach-exynos 2016-04-18 14:25:28 +02:00
plat-versatile
probes
tools ARM: 8562/1: suppress "include/generated/mach-types.h is up to date." 2016-04-19 19:42:47 +01:00
vdso kbuild: drop FORCE from PHONY targets 2016-04-20 10:27:20 +02:00
vfp exit_thread: accept a task parameter to be exited 2016-05-20 17:58:30 -07:00
xen
Kconfig printk/nmi: generic solution for safe printk in NMI 2016-05-20 17:58:30 -07:00
Kconfig-nommu
Kconfig.debug ARM: debug: remove extraneous DEBUG_HI3716_UART option 2016-04-26 13:00:11 +02:00
Makefile ARM: vexpress/mps2: introduce MPS2 platform 2016-04-26 12:50:01 +02:00