kernel/arch/arm/mach-sti, branch linux-6.2.y

Revert "ARM: sti: Implement dummy L2 cache's write_sec"

2020-06-28T12:46:54Z

This reverts commit 7b8e0188fa717cd9abc4fb52587445b421835c2a. Initially, STiH410-B2260 was supposed to be secured, that's why l2c_write_sec was stubbed to avoid secure register access from non secure world. But by default, STiH410-B2260 is running in non secure mode, so L2 cache register accesses are authorized, l2c_write_sec stub is not needed. With this patch, L2 cache is configured and performance are enhanced. Link: https://lore.kernel.org/r/20200618172456.29475-1-patrice.chotard@st.com Signed-off-by: Patrice Chotard Cc: Alain Volmat Signed-off-by: Arnd Bergmann

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19T15:09:55Z

Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Enrico Weigelt Reviewed-by: Kate Stewart Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman

treewide: Add SPDX license identifier - Makefile/Kconfig

2019-05-21T08:50:46Z

Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman

ARM: sti: remove pen_release and boot_lock

2018-12-20T13:32:15Z

The pen_release implementation was created for Versatile platforms to work around boot loaders that did not differentiate between the various different secondary CPUs on this ARM development platform. This should not be true of modern platforms where we send IPIs to specific CPUs to wake them up. Remove the pen_release stuff from SoCs that make use of the per-CPU IPI mechanism. The boot_lock is something that was required for ARM development platforms to ensure that the delay calibration worked properly. This is not necessary for modern platforms that have better bus bandwidth and do not need to calibrate the delay loop for secondary cores. Remove the boot_lock entirely. Due to pen_release and boot_lock removal, .smp_prepare_cpus and .smp_boot_secondary STi callbacks must be reworked properly to allow secondary CPU bring up. Secondary CPU is initialized and started by a U-BOOTROM firmware. Secondary CPU is spinning and waiting for a write at cpu_strt_ptr. Writing secondary_startup address at cpu_strt_ptr makes it to jump directly to secondary_startup(). This write must be done in .smp_boot_secondary callback and not in .smp_prepare_cpus as previously, this insures that secondary_data struct is populated in __cpu_up() (stack, pgdir and swapper_pg_dir fields). The IPI in sti_boot_secondary() is useless, so remove it. This patch is the merged of Russell's patch [1] and the rework of .smp_prepare_cpus and .smp_boot_secondary STi callbacks [2]. [1] https://patchwork.kernel.org/patch/10729435/ [2] https://patchwork.kernel.org/patch/10735795/ Signed-off-by: Russell King Signed-off-by: Patrice Chotard

ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol

2017-02-28T11:06:10Z

All low-level PM/SMP code using virt_to_phys() should actually use __pa_symbol() against kernel symbols. Update code where relevant to move away from virt_to_phys(). Acked-by: Russell King Reviewed-by: Laura Abbott Signed-off-by: Florian Fainelli Signed-off-by: Russell King

reset: sti: Remove STiH415/6 reset support

2016-10-20T09:52:08Z

Support for STiH415/6 SoCs is being removed from the kernel because the platforms are obsolete. This patch removes the reset drivers for these SoC's. Signed-off-by: Peter Griffin Signed-off-by: Philipp Zabel

Merge tag 'sti-soc-for-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/pchotard/sti into next/soc

2016-07-14T13:08:15Z

Merge "STi SoC changes for v4.8" from Patrice Chotard: - Add a dummy L2 cache's write_sec callback as in non secure mode execution, we can't get access to L2 cache secure registers - Cosmetics change, in case of dump_stack, update the hardware name with a more generic for the STi SoCs family * tag 'sti-soc-for-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/pchotard/sti: ARM: sti: Implement dummy L2 cache's write_sec ARM: STi: Update machine _namestr to be more generic.

ARM: sti: Implement dummy L2 cache's write_sec

2016-07-11T07:15:44Z

This patch implements the write_sec callback that handle PL310 secure registers writes. This callback is just a stub for now, to avoid system crash. Later, it could handle SMC calls so that TZ handles the needed writes. Signed-off-by: Patrice Chotard

ARM: STi: Update machine _namestr to be more generic.

2016-07-11T07:15:29Z

This string is used by dump_stack and as we now support more SoC's than just STiH415/6 it is misleading to have the current string in the stack trace. This patch updates it to be more generic for the STi family of SoCs. So instead of looking like this [ 271.672555] Hardware name: STiH415/416 SoC with Flattened Device Tree [ 271.678998] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 271.686746] [] (show_stack) from [] (dump_stack+0x98/0xac) [snip] it now looks like this: [ 2.669879] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.6.0-rc3-00026-g38a1ce6-dirty #76 [ 2.677973] Hardware name: STi SoC with Flattened Device Tree [ 2.683723] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 2.691472] [] (show_stack) from [] (dump_stack+0x98/0xac) [snip] Signed-off-by: Peter Griffin Acked-by: Patrice Chotard

ARM: do away with ARCH_[WANT_OPTIONAL|REQUIRE]_GPIOLIB

2016-06-03T19:18:13Z

This replaces: - "select ARCH_REQUIRE_GPIOLIB" with "select GPIOLIB" as this can now be selected directly. - "select ARCH_WANT_OPTIONAL_GPIOLIB" with no dependency: GPIOLIB is now selectable by everyone, so we need not declare our intent to select it. When ordering the symbols the following rationale was used: if the selects were in alphabetical order, I moved select GPIOLIB to be in alphabetical order, but if the selects were not maintained in alphabetical order, I just replaced "select ARCH_REQUIRE_GPIOLIB" with "select GPIOLIB". Cc: Michael Büsch Cc: arm@kernel.org Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Linus Walleij Signed-off-by: Olof Johansson