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path: root/arch/arm/include/asm/vdso/gettimeofday.h
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* ARM: vdso: Set BUILD_VDSO32 and provide 32bit fallbacksThomas Gleixner2020-01-141-0/+36
| | | | | | | | | | | | | | Setting BUILD_VDSO32 is required to expose the legacy 32bit interfaces in the generic VDSO code which are going to be hidden behind an #ifdef BUILD_VDSO32. The 32bit fallbacks are necessary to remove the existing VDSO_HAS_32BIT_FALLBACK hackery. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/87tv4zq9dc.fsf@nanos.tec.linutronix.de
* ARM: 8947/1: Fix __arch_get_hw_counter() access to CNTVCTVincenzo Frascino2019-12-061-0/+3
| | | | | | | | | | | | | | | | | | | | | | | __arch_get_hw_counter() should check clock_mode to see if it can access CNTVCT. With the conversion to unified vDSO this check has been left out. This causes on imx v6 and v7 (imx_v6_v7_defconfig) and other platforms to hang at boot during the execution of the init process as per below: [ 19.976852] Run /sbin/init as init process [ 20.044931] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000004 Fix the problem verifying that clock_mode is set coherently before accessing CNTVCT. Investigated-by: Arnd Bergmann <arnd@arndb.de> Reported-by: Guenter Roeck <linux@roeck-us.net> Tested-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
* ARM: 8931/1: Add clock_getres entry pointVincenzo Frascino2019-11-151-0/+20
| | | | | | | | | | The generic vDSO library provides an implementation of clock_getres() that can be leveraged by each architecture. Add clock_getres() entry point on arm to be on pair with arm64. Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
* ARM: 8930/1: Add support for generic vDSOVincenzo Frascino2019-11-151-0/+74
The arm vDSO library requires some adaptations to take advantage of the newly introduced generic vDSO library. Introduce the following changes: - Modification vdso.c to be compliant with the common vdso datapage - Use of lib/vdso for gettimeofday - Implementation of elf note Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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