kernel/tools/testing/selftests/rseq/rseq-abi.h, branch linux-rolling-stable

selftests/rseq: Implement rseq mm_cid field support

2022-12-27T11:52:12Z

Add support for the mm_cid field (per-memory-map concurrency ID) of struct rseq to rseq selftests. Signed-off-by: Mathieu Desnoyers Signed-off-by: Peter Zijlstra (Intel) Link: https://lore.kernel.org/r/20221122203932.231377-11-mathieu.desnoyers@efficios.com

selftests/rseq: Implement rseq numa node id field selftest

2022-12-27T11:52:11Z

Test the NUMA node id extension rseq field. Compare it against the value returned by the getcpu(2) system call while pinned on a specific core. Signed-off-by: Mathieu Desnoyers Signed-off-by: Peter Zijlstra (Intel) Link: https://lore.kernel.org/r/20221122203932.231377-7-mathieu.desnoyers@efficios.com

selftests/rseq: Use ELF auxiliary vector for extensible rseq

2022-12-27T11:52:11Z

Use the ELF auxiliary vector AT_RSEQ_FEATURE_SIZE to detect the RSEQ features supported by the kernel. Signed-off-by: Mathieu Desnoyers Signed-off-by: Peter Zijlstra (Intel) Link: https://lore.kernel.org/r/20221122203932.231377-6-mathieu.desnoyers@efficios.com

selftests/rseq: introduce own copy of rseq uapi header

2022-02-02T12:11:33Z

The Linux kernel rseq uapi header has a broken layout for the rseq_cs.ptr field on 32-bit little endian architectures. The entire rseq_cs.ptr field is planned for removal, leaving only the 64-bit rseq_cs.ptr64 field available. Both glibc and librseq use their own copy of the Linux kernel uapi header, where they introduce proper union fields to access to the 32-bit low order bits of the rseq_cs pointer on 32-bit architectures. Introduce a copy of the Linux kernel uapi headers in the Linux kernel selftests. Signed-off-by: Mathieu Desnoyers Signed-off-by: Peter Zijlstra (Intel) Link: https://lkml.kernel.org/r/20220124171253.22072-2-mathieu.desnoyers@efficios.com