kernel/linux.git/tools/testing/selftests/powerpc/copyloops, branch v6.12.80

selftests/powerpc: make sub-folders buildable on their own

2024-04-29T13:54:42+00:00

Build breaks when executing make with run_tests for sub-folders under powerpc. This is because, CFLAGS and GIT_VERSION macros are defined in Makefile of toplevel powerpc folder. make: Entering directory '/home/maddy/linux/tools/testing/selftests/powerpc/mm' gcc hugetlb_vs_thp_test.c ../harness.c ../utils.c -o /home/maddy/selftest_output//hugetlb_vs_thp_test hugetlb_vs_thp_test.c:6:10: fatal error: utils.h: No such file or directory 6 | #include "utils.h" | ^~~~~~~~~ compilation terminated. Fix this by adding the flags.mk in each sub-folder Makefile. Also remove the CFLAGS and GIT_VERSION macros from powerpc/ folder Makefile since the same is definied in flags.mk Signed-off-by: Madhavan Srinivasan Signed-off-by: Michael Ellerman Link: https://msgid.link/20240229093711.581230-3-maddy@linux.ibm.com

selftests/powerpc: Re-order *FLAGS to follow lib.mk

2024-04-29T13:51:16+00:00

In some powerpc/ sub-folder Makefiles, CFLAGS are defined before lib.mk include. Clean it up by re-ordering the flags to follow after the mk include. This is needed to support sub-folders in powerpc/ buildable on its own. Signed-off-by: Madhavan Srinivasan Signed-off-by: Michael Ellerman Link: https://msgid.link/20240229093711.581230-1-maddy@linux.ibm.com

powerpc/64s: Move dcbt/dcbtst sequence into a macro

2024-03-03T12:05:21+00:00

There's an almost identical code sequence to specify load/store access hints in __copy_tofrom_user_power7(), copypage_power7() and memcpy_power7(). Move the sequence into a common macro, which is passed the registers to use as they differ slightly. There also needs to be a copy in the selftests, it could be shared in future if the headers are cleaned up / refactored. Signed-off-by: Michael Ellerman Link: https://msgid.link/20240229122521.762431-1-mpe@ellerman.id.au

powerpc: replace #include with #include

2023-08-16T13:54:48+00:00

Commit ddb5cdbafaaa ("kbuild: generate KSYMTAB entries by modpost") deprecated , which is now a wrapper of . Replace #include with #include . After all the lines are converted, and will be removed. Signed-off-by: Masahiro Yamada [mpe: Fixup selftests that stub asm/export.h] Signed-off-by: Michael Ellerman Link: https://msgid.link/20230806150954.394189-2-masahiroy@kernel.org

powerpc: add CFUNC assembly label annotation

2023-04-20T02:54:24+00:00

This macro is to be used in assembly where C functions are called. pcrel addressing mode requires branches to functions with a localentry value of 1 to have either a trailing nop or @notoc. This macro permits the latter without changing callers. Signed-off-by: Nicholas Piggin [mpe: Add dummy definitions to fix selftests build] Signed-off-by: Michael Ellerman Link: https://msgid.link/20230408021752.862660-5-npiggin@gmail.com

selftests/powerpc/copyloops: Add memmove_64 test

2022-02-12T11:47:44+00:00

While debugging an issue, we wanted to check whether the arch specific kernel memmove implementation is correct. This selftest could help test that. Suggested-by: Aneesh Kumar K.V Suggested-by: Vaibhav Jain Signed-off-by: Ritesh Harjani Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/57242c1fe7aba6b7f0fcd0490303bfd5f222ee00.1631512686.git.riteshh@linux.ibm.com

x86, powerpc: Rename memcpy_mcsafe() to copy_mc_to_{user, kernel}()

2020-10-06T09:18:04+00:00

In reaction to a proposal to introduce a memcpy_mcsafe_fast() implementation Linus points out that memcpy_mcsafe() is poorly named relative to communicating the scope of the interface. Specifically what addresses are valid to pass as source, destination, and what faults / exceptions are handled. Of particular concern is that even though x86 might be able to handle the semantics of copy_mc_to_user() with its common copy_user_generic() implementation other archs likely need / want an explicit path for this case: On Fri, May 1, 2020 at 11:28 AM Linus Torvalds wrote: > > On Thu, Apr 30, 2020 at 6:21 PM Dan Williams wrote: > > > > However now I see that copy_user_generic() works for the wrong reason. > > It works because the exception on the source address due to poison > > looks no different than a write fault on the user address to the > > caller, it's still just a short copy. So it makes copy_to_user() work > > for the wrong reason relative to the name. > > Right. > > And it won't work that way on other architectures. On x86, we have a > generic function that can take faults on either side, and we use it > for both cases (and for the "in_user" case too), but that's an > artifact of the architecture oddity. > > In fact, it's probably wrong even on x86 - because it can hide bugs - > but writing those things is painful enough that everybody prefers > having just one function. Replace a single top-level memcpy_mcsafe() with either copy_mc_to_user(), or copy_mc_to_kernel(). Introduce an x86 copy_mc_fragile() name as the rename for the low-level x86 implementation formerly named memcpy_mcsafe(). It is used as the slow / careful backend that is supplanted by a fast copy_mc_generic() in a follow-on patch. One side-effect of this reorganization is that separating copy_mc_64.S to its own file means that perf no longer needs to track dependencies for its memcpy_64.S benchmarks. [ bp: Massage a bit. ] Signed-off-by: Dan Williams Signed-off-by: Borislav Petkov Reviewed-by: Tony Luck Acked-by: Michael Ellerman Cc: Link: http://lore.kernel.org/r/CAHk-=wjSqtXAqfUJxFtWNwmguFASTgB0dz1dT3V-78Quiezqbg@mail.gmail.com Link: https://lkml.kernel.org/r/160195561680.2163339.11574962055305783722.stgit@dwillia2-desk3.amr.corp.intel.com

.gitignore: add SPDX License Identifier

2020-03-25T10:50:48+00:00

Add SPDX License Identifier to all .gitignore files. Signed-off-by: Masahiro Yamada Signed-off-by: Greg Kroah-Hartman

seltests/powerpc: Add a selftest for memcpy_mcsafe

2019-09-11T23:27:00+00:00

Appropriate self tests for memcpy_mcsafe Suggested-by: Michael Ellerman Signed-off-by: Santosh Sivaraj Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190903214359.23887-2-santosh@fossix.org

selftests/powerpc: Ignore generated files

2019-08-22T13:12:47+00:00

Currently some binary files which are generated when tests are compiled are not ignored by git, so 'git status' catch them. For copyloops test, fix wrong binary names already in .gitignore. For ptrace, security, and stringloops tests add missing binary names to the .gitignore file. Signed-off-by: Gustavo Romero Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190814205638.25322-2-gromero@linux.ibm.com