Changes in flush_utils.h

da650ada - selftests/powerpc: Add uaccess flush test

Thu, 25 Feb 2021 06:19:49 +0000

selftests/powerpc: Add uaccess flush testAlso based on the RFI and entry flush tests, it counts the L1D missesby doing a syscall that does user access: uname, in this case.Signed-off-by: Thadeu Lima de Souza Cascardo [dja: forward port, rename function]Signed-off-by: Daniel Axtens Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210225061949.1213404-1-dja@axtens.net List of files: /linux-6.15/tools/testing/selftests/powerpc/security/flush_utils.h

3a72c94e - selftests/powerpc: Fix L1D flushing tests for Power10

Tue, 23 Feb 2021 07:02:27 +0000

selftests/powerpc: Fix L1D flushing tests for Power10The rfi_flush and entry_flush selftests work by using the PM_LD_MISS_L1perf event to count L1D misses. The value of this event has changedover time:- Power7 uses 0x400f0- Power8 and Power9 use both 0x400f0 and 0x3e054- Power10 uses only 0x3e054Rather than relying on raw values, configure perf to count L1D readmisses in the most explicit way available.This fixes the selftests to work on systems without 0x400f0 asPM_LD_MISS_L1, and should change no behaviour for systems that the testsalready worked on.The only potential downside is that referring to a specific perf eventrequires PMU support implemented in the kernel for that platform.Signed-off-by: Russell Currey Acked-by: Daniel Axtens Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210223070227.2916871-1-ruscur@russell.cc List of files: /linux-6.15/tools/testing/selftests/powerpc/security/flush_utils.h

0d239f3b - selftests/powerpc: refactor entry and rfi_flush tests

Tue, 17 Nov 2020 05:59:15 +0000

selftests/powerpc: refactor entry and rfi_flush testsFor simplicity in backporting, the original entry_flush test containeda lot of duplicated code from the rfi_flush test. De-duplicate that code.Signed-off-by: Daniel Axtens Signed-off-by: Michael Ellerman List of files: /linux-6.15/tools/testing/selftests/powerpc/security/flush_utils.h