kernel/linux.git/tools/testing/selftests/powerpc/security, branch v6.6.131

selftests/powerpc: Fix incorrect kernel headers search path

2023-02-15T11:41:00+00:00

Use $(KHDR_INCLUDES) as lookup path for kernel headers. This prevents building against kernel headers from the build environment in scenarios where kernel headers are installed into a specific output directory (O=...). Cc: stable@vger.kernel.org # v5.18+ Signed-off-by: Mathieu Desnoyers Acked-by: Shuah Khan Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20230127135755.79929-22-mathieu.desnoyers@efficios.com

selftests/powerpc: Add read/write debugfs file, int

2023-02-09T12:56:45+00:00

Debugfs files are not always integers, so make *_file return/write a byte buffer, and *_int deal with int values specifically. This increases consistency with the other file read/write helpers. Signed-off-by: Benjamin Gray Reviewed-by: Andrew Donnellan Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20230203003947.38033-3-bgray@linux.ibm.com

selftests/powerpc: Use mfspr/mtspr macros

2022-12-02T07:04:27+00:00

No need to write inline asm for mtspr/mfspr, we have macros for this in reg.h Signed-off-by: Benjamin Gray Reviewed-by: Andrew Donnellan Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20221128041948.58339-2-bgray@linux.ibm.com

selftests/powerpc: Add missing files to .gitignores

2022-06-29T09:37:04+00:00

These were missed when the respective tests were added, add them now. Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220616070705.1941829-1-mpe@ellerman.id.au

selftests/powerpc/pmu: fix spelling mistake "mis-match" -> "mismatch"

2022-05-22T05:59:54+00:00

There are a few spelling mistakes in error messages. Fix them. Signed-off-by: Colin Ian King Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220319232025.22067-1-colin.i.king@gmail.com

selftests/powerpc: Better reporting in spectre_v2

2022-05-22T05:58:28+00:00

In commit f3054ffd71b5 ("selftests/powerpc: Return skip code for spectre_v2"), the spectre_v2 selftest is updated to be aware of cases where the vulnerability status reported in sysfs is incorrect, skipping the test instead. This happens because qemu can misrepresent the mitigation status of the host to the guest. If the count cache is disabled in the host, and this is correctly reported to the guest, then the guest won't apply mitigations. If the guest is then migrated to a new host where mitigations are necessary, it is now vulnerable because it has not applied mitigations. Update the selftest to report when we see excessive misses, indicative of the count cache being disabled. If software flushing is enabled, also warn that these flushes are just wasting performance. Signed-off-by: Russell Currey [mpe: Rebase and update change log appropriately] Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210608064809.199116-1-ruscur@russell.cc

selftests/powerpc: Fix typo in spectre_v2

2022-05-04T09:37:46+00:00

Signed-off-by: Russell Currey Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210608054851.164659-1-ruscur@russell.cc

selftests/powerpc/pmu: Add macros to parse event codes

2022-03-01T12:38:12+00:00

Each platform has raw event encoding format which specifies the bit positions for different fields. The fields from event code gets translated into performance monitoring mode control register (MMCRx) settings. Patch add macros to extract individual fields from the event code. Add functions for sanity checks, since testcases currently are only supported in power9 and power10. Signed-off-by: Madhavan Srinivasan [mpe: Read PVR directly rather than using /proc/cpuinfo] Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220127072012.662451-4-kjain@linux.ibm.com

selftests/powerpc: skip tests for unavailable mitigations.

2021-12-16T10:31:46+00:00

Mitigation patching test iterates over a set of mitigations irrespective of whether a certain mitigation is supported/available in the kernel. This causes following messages on a kernel where some mitigations are unavailable: Spawned threads enabling/disabling mitigations ... cat: entry_flush: No such file or directory cat: uaccess_flush: No such file or directory Waiting for timeout ... OK This patch adds a check for available mitigations in the kernel. Reported-by: Nageswara R Sastry Signed-off-by: Sachin Sant Tested-by: Nageswara R Sastry Reviewed-by: Russell Currey Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/163941374362.36967.18016981579099073379.sendpatchset@1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa

selftests/powerpc/spectre_v2: Return skip code when miss_percent is high

2021-12-09T11:41:21+00:00

A mis-match between reported and actual mitigation is not restricted to the Vulnerable case. The guest might also report the mitigation as "Software count cache flush" and the host will still mitigate with branch cache disabled. So, instead of skipping depending on the detected mitigation, simply skip whenever the detected miss_percent is the expected one for a fully mitigated system, that is, above 95%. Signed-off-by: Thadeu Lima de Souza Cascardo Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20211207130557.40566-1-cascardo@canonical.com