wireguard-linux/arch/arm64/include/asm/vdso, branch jd/unified-crypt-queue

arm64: vdso32: Include common headers in the vdso library

2020-03-21T14:24:02Z

The vDSO library should only include the necessary headers required for a userspace library (UAPI and a minimal set of kernel headers). To make this possible it is necessary to isolate from the kernel headers the common parts that are strictly necessary to build the library. Refactor the vdso32 implementation to include common headers. Signed-off-by: Vincenzo Frascino Signed-off-by: Thomas Gleixner Acked-by: Catalin Marinas Cc: Will Deacon Link: https://lkml.kernel.org/r/20200320145351.32292-22-vincenzo.frascino@arm.com

arm64: vdso: Include common headers in the vdso library

2020-03-21T14:24:01Z

The vDSO library should only include the necessary headers required for a userspace library (UAPI and a minimal set of kernel headers). To make this possible it is necessary to isolate from the kernel headers the common parts that are strictly necessary to build the library. Refactor the vdso implementation to include common headers. Signed-off-by: Vincenzo Frascino Signed-off-by: Thomas Gleixner Acked-by: Catalin Marinas Cc: Will Deacon Link: https://lkml.kernel.org/r/20200320145351.32292-21-vincenzo.frascino@arm.com

arm64: Introduce asm/vdso/processor.h

2020-03-21T14:24:01Z

The vDSO library should only include the necessary headers required for a userspace library (UAPI and a minimal set of kernel headers). To make this possible it is necessary to isolate from the kernel headers the common parts that are strictly necessary to build the library. Introduce asm/vdso/processor.h to contain all the arm64 specific functions that are suitable for vDSO inclusion. Signed-off-by: Vincenzo Frascino Signed-off-by: Thomas Gleixner Acked-by: Catalin Marinas Cc: Will Deacon Link: https://lkml.kernel.org/r/20200320145351.32292-20-vincenzo.frascino@arm.com

arm64: vdso32: Code clean up

2020-03-21T14:24:00Z

The compat vdso library had some checks that are not anymore relevant. Remove the unused code from the compat vDSO library. Note: This patch is preparatory for a future one that will introduce asm/vdso/processor.h on arm64. Signed-off-by: Vincenzo Frascino Signed-off-by: Thomas Gleixner Acked-by: Catalin Marinas Cc: Will Deacon Link: https://lore.kernel.org/lkml/20200317122220.30393-19-vincenzo.frascino@arm.com Link: https://lkml.kernel.org/r/20200320145351.32292-19-vincenzo.frascino@arm.com

arm64: Introduce asm/vdso/clocksource.h

2020-03-21T14:23:55Z

The vDSO library should only include the necessary headers required for a userspace library (UAPI and a minimal set of kernel headers). To make this possible it is necessary to isolate from the kernel headers the common parts that are strictly necessary to build the library. Introduce asm/vdso/clocksource.h to contain all the arm64 specific functions that are suitable for vDSO inclusion. This header will be required by a future patch that will generalize vdso/clocksource.h. Signed-off-by: Vincenzo Frascino Signed-off-by: Thomas Gleixner Acked-by: Catalin Marinas Cc: Will Deacon Link: https://lkml.kernel.org/r/20200320145351.32292-7-vincenzo.frascino@arm.com

ARM/arm64: vdso: Use common vdso clock mode storage

2020-02-17T19:12:16Z

Convert ARM/ARM64 to the generic VDSO clock mode storage. This needs to happen in one go as they share the clocksource driver. Signed-off-by: Thomas Gleixner Tested-by: Vincenzo Frascino Reviewed-by: Vincenzo Frascino Link: https://lkml.kernel.org/r/20200207124403.363235229@linutronix.de

arm64: compat: vdso: Remove unused VDSO_HAS_32BIT_FALLBACK

2020-01-14T11:20:45Z

VDSO_HAS_32BIT_FALLBACK has been removed from the core since the architectures that support the generic vDSO library have been converted to support the 32 bit fallbacks. Remove unused VDSO_HAS_32BIT_FALLBACK from arm64 compat vdso. Signed-off-by: Vincenzo Frascino Signed-off-by: Thomas Gleixner Acked-by: Catalin Marinas Link: https://lore.kernel.org/r/20190830135902.20861-7-vincenzo.frascino@arm.com

arm64: compat: vdso: Expose BUILD_VDSO32

2020-01-14T11:20:43Z

clock_gettime32 and clock_getres_time32 should be compiled only with the 32 bit vdso library. Expose BUILD_VDSO32 when arm64 compat is compiled, to provide an indication to the generic library to include these symbols. Signed-off-by: Vincenzo Frascino Signed-off-by: Thomas Gleixner Acked-by: Catalin Marinas Link: https://lore.kernel.org/r/20190830135902.20861-2-vincenzo.frascino@arm.com

timekeeping/vsyscall: Update VDSO data unconditionally

2019-11-04T22:02:53Z

The update of the VDSO data is depending on __arch_use_vsyscall() returning True. This is a leftover from the attempt to map the features of various architectures 1:1 into generic code. The usage of __arch_use_vsyscall() in the actual vsyscall implementations got dropped and replaced by the requirement for the architecture code to return U64_MAX if the global clocksource is not usable in the VDSO. But the __arch_use_vsyscall() check in the update code stayed which causes the VDSO data to be stale or invalid when an architecture actually implements that function and returns False when the current clocksource is not usable in the VDSO. As a consequence the VDSO implementations of clock_getres(), time(), clock_gettime(CLOCK_.*_COARSE) operate on invalid data and return bogus information. Remove the __arch_use_vsyscall() check from the VDSO update function and update the VDSO data unconditionally. [ tglx: Massaged changelog and removed the now useless implementations in asm-generic/ARM64/MIPS ] Fixes: 44f57d788e7deecb50 ("timekeeping: Provide a generic update_vsyscall() implementation") Signed-off-by: Huacai Chen Signed-off-by: Thomas Gleixner Cc: Andy Lutomirski Cc: Vincenzo Frascino Cc: Arnd Bergmann Cc: Paul Burton Cc: linux-mips@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/1571887709-11447-1-git-send-email-chenhc@lemote.com

arm64: vdso32: Detect binutils support for dmb ishld

2019-10-07T10:07:16Z

Older versions of binutils (prior to 2.24) do not support the "ISHLD" option for memory barrier instructions, which leads to a build failure when assembling the vdso32 library. Add a compilation time mechanism that detects if binutils supports those instructions and configure the kernel accordingly. Cc: Will Deacon Cc: Catalin Marinas Reported-by: Will Deacon Signed-off-by: Vincenzo Frascino Reviewed-by: Catalin Marinas Tested-by: Catalin Marinas Signed-off-by: Will Deacon