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2020-12-29selftests/vm: fix building protection keys testHarish1-5/+5
Commit d8cbe8bfa7d ("tools/testing/selftests/vm: fix build error") tried to include a ARCH check for powerpc, however ARCH is not defined in the Makefile before including lib.mk. This makes test building to skip on both x86 and powerpc. Fix the arch check by replacing it using machine type as it is already defined and used in the test. Link: https://lkml.kernel.org/r/[email protected] Fixes: d8cbe8bfa7d ("tools/testing/selftests/vm: fix build error") Signed-off-by: Harish <[email protected]> Reviewed-by: Sandipan Das <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Sandipan Das <[email protected]> Cc: John Hubbard <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Kirill A. Shutemov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-16Merge tag 'linux-kselftest-next-5.11-rc1' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Pull Kselftest updates from Shuah Khan: - Much needed gpio test Makefile cleanup to various problems with test dependencies and build errors from Michael Ellerman - Enabling vDSO test on non x86 platforms from Vincenzo Frascino - Fix intel_pstate to replace deprecated ftime() usages with clock_gettime() from Tommi Rantala - cgroup test build fix on older releases from Sachin Sant - A couple of spelling mistake fixes * tag 'linux-kselftest-next-5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: selftests/cgroup: Fix build on older distros selftests/run_kselftest.sh: fix dry-run typo tool: selftests: fix spelling typo of 'writting' selftests/memfd: Fix implicit declaration warnings selftests: intel_pstate: ftime() is deprecated selftests/gpio: Add to CLEAN rule rather than overriding selftests/gpio: Fix build when source tree is read only selftests/gpio: Move include of lib.mk up selftests/gpio: Use TEST_GEN_PROGS_EXTENDED kselftest: Extend vdso correctness test to clock_gettime64 kselftest: Move test_vdso to the vDSO test suite kselftest: Extend vDSO selftest to clock_getres kselftest: Extend vDSO selftest kselftest: Enable vDSO test on non x86 platforms
2020-12-15userfaultfd/selftests: hint the test runner on required privilegePeter Xu1-1/+2
Now userfaultfd test program requires either root or ptrace privilege due to the signal/event tests. When UFFDIO_API failed, hint the test runner about this fact verbosely. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Peter Xu <[email protected]> Cc: Andrea Arcangeli <[email protected]> Cc: Mike Rapoport <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-15userfaultfd/selftests: fix retval check for userfaultfd_open()Peter Xu1-4/+4
userfaultfd_open() returns 1 for errors rather than negatives. Fix it on all the callers so when UFFDIO_API failed the test will bail out. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Peter Xu <[email protected]> Cc: Andrea Arcangeli <[email protected]> Cc: Mike Rapoport <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-15userfaultfd/selftests: always dump something in modesPeter Xu1-0/+2
Patch series "userfaultfd: selftests: Small fixes". Some very trivial fixes that I kept locally to userfaultfd selftest program. This patch (of 3): BOUNCE_POLL is a special bit that if cleared it means "READ" instead. Dump that too otherwise we'll see tests with empty modes. Link: https://lkml.kernel.org/r/[email protected] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Peter Xu <[email protected]> Cc: Andrea Arcangeli <[email protected]> Cc: Mike Rapoport <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-15userfaultfd: selftests: make __{s,u}64 format specifiers portableAxel Rasmussen1-46/+35
On certain platforms (powerpcle is the one on which I ran into this), "%Ld" and "%Lu" are unsuitable for printing __s64 and __u64, respectively, resulting in build warnings. Cast to {u,}int64_t, and use the PRI{d,u}64 macros defined in inttypes.h to print them. This ought to be portable to all platforms. Splitting this off into a separate macro lets us remove some lines, and get rid of some (I would argue) stylistically odd cases where we joined printf() and exit() into a single statement with a ,. Finally, this also fixes a "missing braces around initializer" warning when we initialize prms in wp_range(). [[email protected]: v2] Link: https://lkml.kernel.org/r/[email protected] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Axel Rasmussen <[email protected]> Acked-by: Peter Xu <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Joe Perches <[email protected]> Cc: Mike Rapoport <[email protected]> Cc: Andrea Arcangeli <[email protected]> Cc: David Alan Gilbert <[email protected]> Cc: Greg Thelen <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-15kselftests: vm: add mremap testsKalesh Singh4-0/+357
Patch series "Speed up mremap on large regions", v4. mremap time can be optimized by moving entries at the PMD/PUD level if the source and destination addresses are PMD/PUD-aligned and PMD/PUD-sized. Enable moving at the PMD and PUD levels on arm64 and x86. Other architectures where this type of move is supported and known to be safe can also opt-in to these optimizations by enabling HAVE_MOVE_PMD and HAVE_MOVE_PUD. Observed Performance Improvements for remapping a PUD-aligned 1GB-sized region on x86 and arm64: - HAVE_MOVE_PMD is already enabled on x86 : N/A - Enabling HAVE_MOVE_PUD on x86 : ~13x speed up - Enabling HAVE_MOVE_PMD on arm64 : ~ 8x speed up - Enabling HAVE_MOVE_PUD on arm64 : ~19x speed up Altogether, HAVE_MOVE_PMD and HAVE_MOVE_PUD give a total of ~150x speed up on arm64. This patch (of 4): Test mremap on regions of various sizes and alignments and validate data after remapping. Also provide total time for remapping the region which is useful for performance comparison of the mremap optimizations that move pages at the PMD/PUD levels if HAVE_MOVE_PMD and/or HAVE_MOVE_PUD are enabled. Link: https://lkml.kernel.org/r/[email protected] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Kalesh Singh <[email protected]> Reviewed-by: John Hubbard <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Kirill A. Shutemov <[email protected]> Cc: Suren Baghdasaryan <[email protected]> Cc: Minchan Kim <[email protected]> Cc: Lokesh Gidra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Will Deacon <[email protected]> Cc: Peter Zijlstra (Intel) <[email protected]> Cc: Kees Cook <[email protected]> Cc: Aneesh Kumar K.V <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Sami Tolvanen <[email protected]> Cc: Masahiro Yamada <[email protected]> Cc: Krzysztof Kozlowski <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: Hassan Naveed <[email protected]> Cc: Christian Brauner <[email protected]> Cc: Anshuman Khandual <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Gavin Shan <[email protected]> Cc: Mike Rapoport <[email protected]> Cc: Steven Price <[email protected]> Cc: Jia He <[email protected]> Cc: Ram Pai <[email protected]> Cc: Sandipan Das <[email protected]> Cc: Zi Yan <[email protected]> Cc: Mina Almasry <[email protected]> Cc: Ralph Campbell <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Brian Geffon <[email protected]> Cc: Masami Hiramatsu <[email protected]> Cc: SeongJae Park <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-15selftests/vm: 2x speedup for run_vmtests.shJohn Hubbard1-2/+2
Each invocation of userfaultfd for "anon" and "shmem" was taking about 6.5 sec to run, contributing to an overall run time of about 22 sec for run_vmtests.sh. Reduce the size and bounce input values to the userfaultfd invocation within run_vmtests.sh, enough to get each invocation down to about 1.0 sec. This should still provide a reasonable smoke test, while staying within a nominal time budget of around 1 second or so per test. And this brings the overall running time of run_vmtests.sh down to 11 second. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: John Hubbard <[email protected]> Cc: Mike Rapoport <[email protected]> Cc: Shuah Khan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-15selftests/vm: hmm-tests: remove the libhugetlbfs dependencyJohn Hubbard4-3/+63
HMM selftests are incredibly useful, but they are only effective if people actually build and run them. All the other tests in selftests/vm can be built with very standard, always-available libraries: libpthread, librt. The hmm-tests.c program, on the other hand, requires something that is (much) less readily available: libhugetlbfs. And so the build will typically fail for many developers. A simple attempt to install libhugetlbfs will also run into complications on some common distros these days: Fedora and Arch Linux (yes, Arch AUR has it, but that's fragile, as always with AUR). The library is not maintained actively enough at the moment, for distros to deal with it. I had to build it from source, for Fedora, and that didn't go too smoothly either. It turns out that, out of 21 tests in hmm-tests.c, only 2 actually require functionality from libhugetlbfs. Therefore, if libhugetlbfs is missing, simply ifdef those two tests out and allow the developer to at least have the other 19 tests, if they don't want to pause to work through the above issues. Also issue a warning, so that it's clear that there is an imperfection in the build. In order to do that, a tiny shell script (check_config.sh) runs a quick compile (not link, that's too prone to false failures with library paths), and basically, if the compiler doesn't find hugetlbfs.h in its standard locations, then the script concludes that libhugetlbfs is not available. The output is in two files, one for inclusion in hmm-test.c (local_config.h), and one for inclusion in the Makefile (local_config.mk). Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: John Hubbard <[email protected]> Cc: Ralph Campbell <[email protected]> Cc: Jérôme Glisse <[email protected]> Cc: Jonathan Corbet <[email protected]> Cc: Shuah Khan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-15selftests/vm: run_vmtests.sh: update and clean up gup_test invocationJohn Hubbard1-8/+20
Run benchmarks on the _fast variants of gup and pup, as originally intended. Run the new gup_test sub-test: dump pages. In addition to exercising the dump_page() call, it also demonstrates the various options you can use to specify which pages to dump, and how. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: John Hubbard <[email protected]> Cc: Jérôme Glisse <[email protected]> Cc: Jonathan Corbet <[email protected]> Cc: Ralph Campbell <[email protected]> Cc: Shuah Khan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-15selftests/vm: gup_test: introduce the dump_pages() sub-testJohn Hubbard1-2/+43
For quite a while, I was doing a quick hack to gup_test.c (previously, gup_benchmark.c) whenever I wanted to try out my changes to dump_page(). This makes that hack unnecessary, and instead allows anyone to easily get the same coverage from a user space program. That saves a lot of time because you don't have to change the kernel, in order to test different pages and options. The new sub-test takes advantage of the existing gup_test infrastructure, which already provides a simple user space program, some allocated user space pages, an ioctl call, pinning of those pages (via either get_user_pages or pin_user_pages) and a corresponding kernel-side test invocation. There's not much more required, mainly just a couple of inputs from the user. In fact, the new test re-uses the existing command line options in order to get various helpful combinations (THP or normal, _fast or slow gup, gup vs. pup, and more). New command line options are: which pages to dump, and what type of "get/pin" to use. In order to figure out which pages to dump, the logic is: * If the user doesn't specify anything, the page 0 (the first page in the address range that the program sets up for testing) is dumped. * Or, the user can type up to 8 page indices anywhere on the command line. If you type more than 8, then it uses the first 8 and ignores the remaining items. For example: ./gup_test -ct -F 1 0 19 0x1000 Meaning: -c: dump pages sub-test -t: use THP pages -F 1: use pin_user_pages() instead of get_user_pages() 0 19 0x1000: dump pages 0, 19, and 4096 Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: John Hubbard <[email protected]> Cc: Jérôme Glisse <[email protected]> Cc: Jonathan Corbet <[email protected]> Cc: Ralph Campbell <[email protected]> Cc: Shuah Khan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-15selftests/vm: only some gup_test items are really benchmarksJohn Hubbard1-8/+39
Therefore, some minor cleanup and improvements are in order: 1. Rename the other items appropriately. 2. Stop reporting timing information on the non-benchmark items. It's still being recorded and is available, but there's no point in cluttering up the report with data that no one reasonably needs to check. 3. Don't do iterations, for non-benchmark items. 4. Print out a shorter, more appropriate report for the non-benchmark tests. 5. Add the command that was run, to the report. This really helps, as there are quite a lot of options now. 6. Use a larger integer type for cmd, now that it's being compared Otherwise it doesn't work, because in this case cmd is about 3 billion, which is the perfect size for problems with signed vs unsigned int. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: John Hubbard <[email protected]> Cc: Jérôme Glisse <[email protected]> Cc: Jonathan Corbet <[email protected]> Cc: Ralph Campbell <[email protected]> Cc: Shuah Khan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-15selftests/vm: minor cleanup: Makefile and gup_test.cJohn Hubbard2-7/+4
A few cleanups that don't deserve separate patches, but that also should not clutter up other functional changes: 1. Remove an unnecessary #include <prctl.h> 2. Restore the sorted order of TEST_GEN_FILES. 3. Add -lpthread to the common LDLIBS, as it is harmless and several tests use it. This gets rid of one special rule already. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: John Hubbard <[email protected]> Cc: Jérôme Glisse <[email protected]> Cc: Jonathan Corbet <[email protected]> Cc: Ralph Campbell <[email protected]> Cc: Shuah Khan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-15selftests/vm: rename run_vmtests --> run_vmtests.shJohn Hubbard1-1/+1
Rename to *.sh, in order to match the conventions of all of the other items in selftest/vm. The only reason not to use a .sh suffix a shell script like this, might be to make it look more like a normal program, but that's not an issue here. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: John Hubbard <[email protected]> Cc: Jérôme Glisse <[email protected]> Cc: Jonathan Corbet <[email protected]> Cc: Ralph Campbell <[email protected]> Cc: Shuah Khan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-15selftests/vm: use a common gup_test.hJohn Hubbard2-21/+3
Avoid the need to copy-paste the gup_test ioctl commands and the struct gup_test definition, between the kernel and the user space application, by providing a new header file for these. This allows easier and safer adding of new ioctl calls, as well as reducing the overall line count. Details: The header file has to be able to compile independently, because of the arguably unfortunate way that the Makefile is written: the Makefile tries to build all of its prerequisites, when really it should be only building the .c files, and leaving the other prerequisites (LOCAL_HDRS) as pure dependencies. That Makefile limitation is probably not worth fixing, but it explains why one of the includes had to be moved into the new header file. Also: simplify the ioctl struct (struct gup_test), by deleting the unused __expansion[10] field. This sort of thing is what you might see in a stable ABI, but this low-level, kernel-developer-oriented selftests/vm system is very much not subject to ABI stability. So "expansion" and "reserved" fields are unnecessary here. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: John Hubbard <[email protected]> Cc: Jérôme Glisse <[email protected]> Cc: Jonathan Corbet <[email protected]> Cc: Ralph Campbell <[email protected]> Cc: Shuah Khan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-15mm/gup_benchmark: rename to mm/gup_testJohn Hubbard5-15/+15
Patch series "selftests/vm: gup_test, hmm-tests, assorted improvements", v3. Summary: This series provides two main things, and a number of smaller supporting goodies. The two main points are: 1) Add a new sub-test to gup_test, which in turn is a renamed version of gup_benchmark. This sub-test allows nicer testing of dump_pages(), at least on user-space pages. For quite a while, I was doing a quick hack to gup_test.c whenever I wanted to try out changes to dump_page(). Then Matthew Wilcox asked me what I meant when I said "I used my dump_page() unit test", and I realized that it might be nice to check in a polished up version of that. Details about how it works and how to use it are in the commit description for patch #6 ("selftests/vm: gup_test: introduce the dump_pages() sub-test"). 2) Fixes a limitation of hmm-tests: these tests are incredibly useful, but only if people actually build and run them. And it turns out that libhugetlbfs is a little too effective at throwing a wrench in the works, there. So I've added a little configuration check that removes just two of the 21 hmm-tests, if libhugetlbfs is not available. Further details in the commit description of patch #8 ("selftests/vm: hmm-tests: remove the libhugetlbfs dependency"). Other smaller things that this series does: a) Remove code duplication by creating gup_test.h. b) Clear up the sub-test organization, and their invocation within run_vmtests.sh. c) Other minor assorted improvements. [1] v2 is here: https://lore.kernel.org/linux-doc/[email protected]/ [2] https://lore.kernel.org/r/CAHk-=wgh-TMPHLY3jueHX7Y2fWh3D+nMBqVS__AZm6-oorquWA@mail.gmail.com This patch (of 9): Rename nearly every "gup_benchmark" reference and file name to "gup_test". The one exception is for the actual gup benchmark test itself. The current code already does a *little* bit more than benchmarking, and definitely covers more than get_user_pages_fast(). More importantly, however, subsequent patches are about to add some functionality that is non-benchmark related. Closely related changes: * Kconfig: in addition to renaming the options from GUP_BENCHMARK to GUP_TEST, update the help text to reflect that it's no longer a benchmark-only test. Link: https://lkml.kernel.org/r/[email protected] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: John Hubbard <[email protected]> Cc: Jonathan Corbet <[email protected]> Cc: Jérôme Glisse <[email protected]> Cc: Ralph Campbell <[email protected]> Cc: Shuah Khan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-12-06userfaultfd: selftests: fix SIGSEGV if huge mmap failsAxel Rasmussen1-9/+16
The error handling in hugetlb_allocate_area() was incorrect for the hugetlb_shared test case. Previously the behavior was: - mmap a hugetlb area - If this fails, set the pointer to NULL, and carry on - mmap an alias of the same hugetlb fd - If this fails, munmap the original area If the original mmap failed, it's likely the second one did too. If both failed, we'd blindly try to munmap a NULL pointer, causing a SIGSEGV. Instead, "goto fail" so we return before trying to mmap the alias. This issue can be hit "in real life" by forgetting to set /proc/sys/vm/nr_hugepages (leaving it at 0), and then trying to run the hugetlb_shared test. Another small improvement is, when the original mmap fails, don't just print "it failed": perror(), so we can see *why*. :) Signed-off-by: Axel Rasmussen <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Peter Xu <[email protected]> Cc: Joe Perches <[email protected]> Cc: Mike Rapoport <[email protected]> Cc: Andrea Arcangeli <[email protected]> Cc: David Alan Gilbert <[email protected]> Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Linus Torvalds <[email protected]>
2020-12-06tools/testing/selftests/vm: fix build errorXingxing Su1-0/+4
Only x86 and PowerPC implement the pkey-xxx.h, and an error was reported when compiling protection_keys.c. Add a Arch judgment to compile "protection_keys" in the Makefile. If other arch implement this, add the arch name to the Makefile. eg: ifneq (,$(findstring $(ARCH),powerpc mips ... )) Following build errors: pkey-helpers.h:93:2: error: #error Architecture not supported #error Architecture not supported pkey-helpers.h:96:20: error: `PKEY_DISABLE_ACCESS' undeclared #define PKEY_MASK (PKEY_DISABLE_ACCESS | PKEY_DISABLE_WRITE) ^ protection_keys.c:218:45: error: `PKEY_DISABLE_WRITE' undeclared pkey_assert(flags & (PKEY_DISABLE_ACCESS | PKEY_DISABLE_WRITE)); ^ Signed-off-by: Xingxing Su <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Sandipan Das <[email protected]> Cc: John Hubbard <[email protected]> Cc: Dave Hansen <[email protected]> Cc: "Kirill A. Shutemov" <[email protected]> Cc: Brian Geffon <[email protected]> Cc: Mina Almasry <[email protected]> Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Linus Torvalds <[email protected]>
2020-11-10tool: selftests: fix spelling typo of 'writting'Wang Qing1-2/+2
writting -> writing Signed-off-by: Wang Qing <[email protected]> Reviewed-by: Mike Rapoport <[email protected]> Signed-off-by: Shuah Khan <[email protected]>
2020-10-18selftests/vm: 10x speedup for hmm-testsJohn Hubbard1-1/+1
This patch reduces the running time for hmm-tests from about 10+ seconds, to just under 1.0 second, for an approximately 10x speedup. That brings it in line with most of the other tests in selftests/vm, which mostly run in < 1 sec. This is done with a one-line change that simply reduces the number of iterations of several tests, from 256, to 10. Thanks to Ralph Campbell for suggesting changing NTIMES as a way to get the speedup. Suggested-by: Ralph Campbell <[email protected]> Signed-off-by: John Hubbard <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Cc: SeongJae Park <[email protected]> Cc: Shuah Khan <[email protected]> Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Linus Torvalds <[email protected]>
2020-10-15Merge branch 'for-linus' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial Pull trivial updates from Jiri Kosina: "The latest advances in computer science from the trivial queue" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: xtensa: fix Kconfig typo spelling.txt: Remove some duplicate entries mtd: rawnand: oxnas: cleanup/simplify code selftests: vm: add fragment CONFIG_GUP_BENCHMARK perf: Fix opt help text for --no-bpf-event HID: logitech-dj: Fix spelling in comment bootconfig: Fix kernel message mentioning CONFIG_BOOT_CONFIG MAINTAINERS: rectify MMP SUPPORT after moving cputype.h scif: Fix spelling of EACCES printk: fix global comment lib/bitmap.c: fix spello fs: Fix missing 'bit' in comment
2020-10-14Merge tag 'linux-kselftest-fixes-5.10-rc1' of ↵Linus Torvalds2-119/+195
git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Pull kselftest updates from Shuah Khan: - a selftests harness fix to flush stdout before forking to avoid parent and child printing duplicates messages. This is evident when test output is redirected to a file. - a tools/ wide change to avoid comma separated statements from Joe Perches. This fix spans tools/lib, tools/power/cpupower, and selftests. * tag 'linux-kselftest-fixes-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: tools: Avoid comma separated statements selftests/harness: Flush stdout before forking
2020-10-13selftests/vm: 8x compaction_test speedupJohn Hubbard1-5/+6
This patch reduces the running time for compaction_test from about 27 sec, to 3.3 sec, which is about an 8x speedup. These numbers are for an Intel x86_64 system with 32 GB of DRAM. The compaction_test.c program was spending most of its time doing mmap(), 1 MB at a time, on about 25 GB of memory. Instead, do the mmaps 100 MB at a time. (Going past 100 MB doesn't make things go much faster, because other parts of the program are using the remaining time.) Signed-off-by: John Hubbard <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Acked-by: Sri Jayaramappa <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Mel Gorman <[email protected]> Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Linus Torvalds <[email protected]>
2020-10-13tools/testing/selftests/vm/hmm-tests.c: use the new SKIP() macroRalph Campbell1-2/+2
Some tests might not be able to be run if resources like huge pages are not available. Mark these tests as skipped instead of simply passing. Signed-off-by: Ralph Campbell <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Reviewed-by: Jason Gunthorpe <[email protected]> Cc: Jerome Glisse <[email protected]> Cc: John Hubbard <[email protected]> Cc: Shuah Khan <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Linus Torvalds <[email protected]>
2020-10-13selftests/vm: fix incorrect gcc invocation in some casesJohn Hubbard1-0/+12
Avoid accidental wrong builds, due to built-in rules working just a little bit too well--but not quite as well as required for our situation here. In other words, "make userfaultfd" (for example) is supposed to fail to build at all, because this Makefile only supports either "make" (all), or "make /full/path". However, the built-in rules, if not suppressed, will pick up CFLAGS and the initial LDLIBS (but not the target-specific LDLIBS, because those are only set for the full path target!). This causes it to get pretty far into building things despite using incorrect values such as an *occasionally* incomplete LDLIBS value. Signed-off-by: John Hubbard <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Jason Gunthorpe <[email protected]> Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Linus Torvalds <[email protected]>
2020-10-13selftests/vm: fix false build success on the second and later attemptsJohn Hubbard1-0/+5
Patch series "selftests/vm: fix some minor aggravating factors in the Makefile". This fixes a couple of minor aggravating factors that I ran across while trying to do some changes in selftests/vm. These are simple things, but like most things with GNU Make, it's rarely obvious what's wrong until you understand *the entire Makefile and all of its includes*. So while there is, of course, joy in learning those details, I thought I'd fix these little things, so as to allow others to skip out on the Joy if they so choose. :) First of all, if you have an item (let's choose userfaultfd for an example) that fails to build, you might do this: $ make -j32 # ...you observe a failed item in the threaded output # OK, let's get a closer look $ make # ...but now the build quietly "succeeds". That's what Patch 0001 fixes. Second, if you instead attempt this approach for your closer look (a casual mistake, as it's not supported): $ make userfaultfd # ...userfaultfd fails to link, due to incomplete LDLIBS That's what Patch 0002 fixes. This patch (of 2): If one or more of these selftest fail to build, then after the first failure, subsequent invocations of "make" will make it appear that there are no build failures, after all. That's because the failed build products remain, with up-to-date timestamps, thus tricking Make (and you!) into believing that there's nothing else to build. Fix this by telling Make to delete targets that didn't completely succeed. Signed-off-by: John Hubbard <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Jason Gunthorpe <[email protected]> Link: https://lkml.kernel.org/r/[email protected] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Linus Torvalds <[email protected]>
2020-10-13mm/gup_benchmark: use pin_user_pages for FOLL_LONGTERM flagBarry Song1-7/+7
According to Documentation/core-api/pin_user_pages.rst, FOLL_PIN is a prerequisite to FOLL_LONGTERM. Another way of saying that is, FOLL_LONGTERM is a specific case, more restrictive case of FOLL_PIN. Almost all kernel modules are using pin_user_pages() with FOLL_LONGTERM, mm/gup_benchmark.c seems to the only exception in which FOLL_PIN is not a prerequisite to FOLL_LONGTERM. Signed-off-by: Barry Song <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Reviewed-by: John Hubbard <[email protected]> Cc: Jan Kara <[email protected]> Cc: Jérôme Glisse <[email protected]> Cc: "Matthew Wilcox (Oracle)" <[email protected]> Cc: Al Viro <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Dan Williams <[email protected]> Cc: Dave Chinner <[email protected]> Cc: Jason Gunthorpe <[email protected]> Cc: Jonathan Corbet <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Mike Kravetz <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Vlastimil Babka <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Linus Torvalds <[email protected]>
2020-10-02tools: Avoid comma separated statementsJoe Perches2-119/+195
Use semicolons and braces. Signed-off-by: Joe Perches <[email protected]> Signed-off-by: Shuah Khan <[email protected]>
2020-09-19selftests/vm: fix display of page size in map_hugetlbChristophe Leroy1-1/+1
The displayed size is in bytes while the text says it is in kB. Shift it by 10 to really display kBytes. Fixes: fa7b9a805c79 ("tools/selftest/vm: allow choosing mem size and page size in map_hugetlb") Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Cc: <[email protected]> Link: https://lkml.kernel.org/r/e27481224564a93d14106e750de31189deaa8bc8.1598861977.git.christophe.leroy@csgroup.eu Signed-off-by: Linus Torvalds <[email protected]>
2020-09-01selftests: vm: add fragment CONFIG_GUP_BENCHMARKAnatoly Pugachev1-0/+1
When running gup_benchmark test the following output states that the config options is missing. $ sudo ./gup_benchmark open: No such file or directory $ sudo strace -e trace=file ./gup_benchmark 2>&1 | tail -3 openat(AT_FDCWD, "/sys/kernel/debug/gup_benchmark", O_RDWR) = -1 ENOENT (No such file or directory) open: No such file or directory +++ exited with 1 +++ Fix it by adding config option fragment. Fixes: 64c349f4ae78 ("mm: add infrastructure for get_user_pages_fast() benchmarking") Signed-off-by: Anatoly Pugachev <[email protected]> CC: Jiri Kosina <[email protected]> CC: Shuah Khan <[email protected]> Signed-off-by: Jiri Kosina <[email protected]>
2020-08-12mm/migrate: add migrate-shared test for migrate_vma_*()Ralph Campbell1-0/+35
Add a migrate_vma_*() self test for mmap(MAP_SHARED) to verify that !vma_anonymous() ranges won't be migrated. Signed-off-by: Ralph Campbell <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Cc: Jerome Glisse <[email protected]> Cc: John Hubbard <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Jason Gunthorpe <[email protected]> Cc: "Bharata B Rao" <[email protected]> Cc: Shuah Khan <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Linus Torvalds <[email protected]>
2020-08-05Merge tag 'for-linus-hmm' of ↵Linus Torvalds1-4/+90
git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma Pull hmm updates from Jason Gunthorpe: "Ralph has been working on nouveau's use of hmm_range_fault() and migrate_vma() which resulted in this small series. It adds reporting of the page table order from hmm_range_fault() and some optimization of migrate_vma(): - Report the size of the page table mapping out of hmm_range_fault(). This makes it easier to establish a large/huge/etc mapping in the device's page table. - Allow devices to ignore the invalidations during migration in cases where the migration is not going to change pages. For instance migrating pages to a device does not require the device to invalidate pages already in the device. - Update nouveau and hmm_tests to use the above" * tag 'for-linus-hmm' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: mm/hmm/test: use the new migration invalidation nouveau/svm: use the new migration invalidation mm/notifier: add migration invalidation type mm/migrate: add a flags parameter to migrate_vma nouveau: fix storing invalid ptes nouveau/hmm: support mapping large sysmem pages nouveau: fix mapping 2MB sysmem pages nouveau/hmm: fault one page at a time mm/hmm: add tests for hmm_pfn_to_map_order() mm/hmm: provide the page mapping order in hmm_range_fault()
2020-07-28mm/hmm/test: use the new migration invalidationRalph Campbell1-4/+14
Use the new MMU_NOTIFY_MIGRATE event to skip MMU invalidations of device private memory and handle the invalidation in the driver as part of migrating device private memory. Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Ralph Campbell <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-07-10mm/hmm: add tests for hmm_pfn_to_map_order()Ralph Campbell1-0/+76
Add a sanity test for hmm_range_fault() returning the page mapping size order. Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Ralph Campbell <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-06-26selftests/vm/keys: fix a broken reference at protection_keys.cMauro Carvalho Chehab1-1/+1
Changeset 1eecbcdca2bd ("docs: move protection-keys.rst to the core-api book") from Jun 7, 2019 converted protection-keys.txt file to ReST. A recent change at protection_keys.c partially reverted such changeset, causing it to point to a non-existing file: - * Tests x86 Memory Protection Keys (see Documentation/core-api/protection-keys.rst) + * Tests Memory Protection Keys (see Documentation/vm/protection-keys.txt) It sounds to me that the changeset that introduced such change 4645e3563673 ("selftests/vm/pkeys: rename all references to pkru to a generic name") could also have other side effects, as it sounds that it was not generated against uptream code, but, instead, against a version older than Jun 7, 2019. Fixes: 4645e3563673 ("selftests/vm/pkeys: rename all references to pkru to a generic name") Signed-off-by: Mauro Carvalho Chehab <[email protected]> Link: https://lore.kernel.org/r/cf65aa052669f55b9dc976a5c8026aef5840741d.1592895969.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <[email protected]>
2020-06-10khugepaged: selftests: fix timeout condition in wait_for_scan()Dan Carpenter1-1/+1
The loop exits with "timeout" set to -1 and not to 0 so the test needs to be fixed. Fixes: e7b592f6caca ("khugepaged: add self test") Signed-off-by: Dan Carpenter <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Stephen Rothwell <[email protected]> Cc: Zi Yan <[email protected]> Cc: William Kucharski <[email protected]> Cc: Yang Shi <[email protected]> Cc: John Hubbard <[email protected]> Link: http://lkml.kernel.org/r/20200605110736.GH978434@mwanda Acked-by: Kirill A. Shutemov <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2020-06-04tools/testing/selftests/vm: remove duplicate headersJagadeesh Pagadala1-1/+0
Code cleanup: Remove duplicate headers which are included twice. Signed-off-by: Jagadeesh Pagadala <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Brian Geffon <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Linus Torvalds <[email protected]>
2020-06-04selftests: vm: pkeys: fix multilib builds for x86Sandipan Das1-1/+73
This ensures that both 32-bit and 64-bit binaries are generated when this is built on a x86_64 system. Most of the changes have been borrowed from tools/testing/selftests/x86/Makefile. Signed-off-by: Sandipan Das <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Tested-by: Dave Hansen <[email protected]> Acked-by: Dave Hansen <[email protected]> Cc: "Desnes A. Nunes do Rosario" <[email protected]> Cc: Florian Weimer <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Ram Pai <[email protected]> Cc: Thiago Jung Bauermann <[email protected]> Cc: "Aneesh Kumar K.V" <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Michal Suchanek <[email protected]> Cc: Shuah Khan <[email protected]> Link: http://lkml.kernel.org/r/0326a442214d7a1b970d38296e63df3b217f5912.1585646528.git.sandipan@linux.ibm.com Signed-off-by: Linus Torvalds <[email protected]>
2020-06-04selftests: vm: pkeys: use the correct page size on powerpcSandipan Das2-1/+6
Both 4K and 64K pages are supported on powerpc. Parts of the selftest code perform alignment computations based on the PAGE_SIZE macro which is currently hardcoded to 64K for powerpc. This causes some test failures on kernels configured with 4K page size. In some cases, we need to enforce function alignment on page size. Since this can only be done at build time, 64K is used as the alignment factor as that also ensures 4K alignment. Signed-off-by: Sandipan Das <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Acked-by: Dave Hansen <[email protected]> Cc: "Desnes A. Nunes do Rosario" <[email protected]> Cc: Florian Weimer <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Ram Pai <[email protected]> Cc: Thiago Jung Bauermann <[email protected]> Cc: "Aneesh Kumar K.V" <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Michal Suchanek <[email protected]> Cc: Shuah Khan <[email protected]> Link: http://lkml.kernel.org/r/5dcdfbf3353acdc90f315172e800b49f5ca21299.1585646528.git.sandipan@linux.ibm.com Signed-off-by: Linus Torvalds <[email protected]>
2020-06-04selftests/vm/pkeys: override access right definitions on powerpcRam Pai1-6/+4
Some platforms hardcode the x86 values for PKEY_DISABLE_ACCESS and PKEY_DISABLE_WRITE such as those in: /usr/include/bits/mman-shared.h. This overrides the definitions with correct values for powerpc. [[email protected]: fix powerpc access right definitions] Link: http://lkml.kernel.org/r/1ba86fd8a94f38131cfe2d9f277001dd1ad1d34e.1588959697.git.sandipan@linux.ibm.com Signed-off-by: Ram Pai <[email protected]> Signed-off-by: Sandipan Das <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Acked-by: Dave Hansen <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Florian Weimer <[email protected]> Cc: "Desnes A. Nunes do Rosario" <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thiago Jung Bauermann <[email protected]> Cc: "Aneesh Kumar K.V" <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Michal Suchanek <[email protected]> Cc: Shuah Khan <[email protected]> Link: http://lkml.kernel.org/r/f6eb38cb3a1e12eb2cdc9da6300bc5a5dfba0db9.1585646528.git.sandipan@linux.ibm.com Signed-off-by: Linus Torvalds <[email protected]>
2020-06-04selftests/vm/pkeys: test correct behaviour of pkey-0Ram Pai1-0/+53
Ensure that pkey-0 is allocated on start and that it can be attached dynamically in various modes, without failures. Signed-off-by: Ram Pai <[email protected]> Signed-off-by: Sandipan Das <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Acked-by: Dave Hansen <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Florian Weimer <[email protected]> Cc: "Desnes A. Nunes do Rosario" <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thiago Jung Bauermann <[email protected]> Cc: "Aneesh Kumar K.V" <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Michal Suchanek <[email protected]> Cc: Shuah Khan <[email protected]> Link: http://lkml.kernel.org/r/9b7c54a9b4261894fe0c7e884c70b87214ff8fbb.1585646528.git.sandipan@linux.ibm.com Signed-off-by: Linus Torvalds <[email protected]>
2020-06-04selftests/vm/pkeys: introduce a sub-page allocatorRam Pai4-0/+37
This introduces a new allocator that allocates 4K hardware pages to back 64K linux pages. This allocator is available only on powerpc. Signed-off-by: Ram Pai <[email protected]> Signed-off-by: Thiago Jung Bauermann <[email protected]> Signed-off-by: Sandipan Das <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Acked-by: Dave Hansen <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Florian Weimer <[email protected]> Cc: "Desnes A. Nunes do Rosario" <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: "Aneesh Kumar K.V" <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Michal Suchanek <[email protected]> Cc: Shuah Khan <[email protected]> Link: http://lkml.kernel.org/r/c4a82fa962ec71015b994fab1aaf83bdfd091553.1585646528.git.sandipan@linux.ibm.com Signed-off-by: Linus Torvalds <[email protected]>
2020-06-04selftests/vm/pkeys: detect write violation on a mapped access-denied-key pageRam Pai1-0/+13
Detect write-violation on a page to which access-disabled key is associated much after the page is mapped. Signed-off-by: Ram Pai <[email protected]> Signed-off-by: Sandipan Das <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Acked-by: Dave Hansen <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Florian Weimer <[email protected]> Cc: "Desnes A. Nunes do Rosario" <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thiago Jung Bauermann <[email protected]> Cc: "Aneesh Kumar K.V" <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Michal Suchanek <[email protected]> Cc: Shuah Khan <[email protected]> Link: http://lkml.kernel.org/r/6a7dd4069ee18a2a51b207a55aa197f3f3c59753.1585646528.git.sandipan@linux.ibm.com Signed-off-by: Linus Torvalds <[email protected]>
2020-06-04selftests/vm/pkeys: associate key on a mapped page and detect write violationRam Pai1-0/+12
Detect write-violation on a page to which write-disabled key is associated much after the page is mapped. Signed-off-by: Ram Pai <[email protected]> Signed-off-by: Sandipan Das <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Acked-by: Dave Hansen <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Florian Weimer <[email protected]> Cc: "Desnes A. Nunes do Rosario" <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thiago Jung Bauermann <[email protected]> Cc: "Aneesh Kumar K.V" <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Michal Suchanek <[email protected]> Cc: Shuah Khan <[email protected]> Link: http://lkml.kernel.org/r/6bfe3b3832f8bcfb07d7f2cf116b45197f4587dd.1585646528.git.sandipan@linux.ibm.com Signed-off-by: Linus Torvalds <[email protected]>
2020-06-04selftests/vm/pkeys: associate key on a mapped page and detect access violationRam Pai1-0/+19
Detect access-violation on a page to which access-disabled key is associated much after the page is mapped. Signed-off-by: Ram Pai <[email protected]> Signed-off: Sandipan Das <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Acked-by: Dave Hansen <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Florian Weimer <[email protected]> Cc: "Desnes A. Nunes do Rosario" <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thiago Jung Bauermann <[email protected]> Cc: "Aneesh Kumar K.V" <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Michal Suchanek <[email protected]> Cc: Shuah Khan <[email protected]> Link: http://lkml.kernel.org/r/4a19cf9252c03dd883887e9002881599e6900d06.1585646528.git.sandipan@linux.ibm.com Signed-off-by: Linus Torvalds <[email protected]>
2020-06-04selftests/vm/pkeys: improve checks to determine pkey supportRam Pai4-5/+37
For the pkeys subsystem to work, both the CPU and the kernel need to have support. So, additionally check if the kernel supports pkeys apart from the CPU feature checks. Signed-off-by: Ram Pai <[email protected]> Signed-off-by: Sandipan Das <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Acked-by: Dave Hansen <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Florian Weimer <[email protected]> Cc: "Desnes A. Nunes do Rosario" <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thiago Jung Bauermann <[email protected]> Cc: "Aneesh Kumar K.V" <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Michal Suchanek <[email protected]> Cc: Shuah Khan <[email protected]> Link: http://lkml.kernel.org/r/8fb76c63ebdadcf068ecd2d23731032e195cd364.1585646528.git.sandipan@linux.ibm.com Signed-off-by: Linus Torvalds <[email protected]>
2020-06-04selftests/vm/pkeys: fix assertion in test_pkey_alloc_exhaust()Ram Pai1-1/+10
Some pkeys which are valid on the hardware are reserved and not available for application use. These keys cannot be allocated. test_pkey_alloc_exhaust() tries to account for these and has an assertion which validates if all available pkeys have been exahaustively allocated. However, the expression that is currently used is only valid for x86. On powerpc, a pkey is additionally reserved as compared to x86. Hence, the assertion is made to use an arch-specific helper to get the correct count of reserved pkeys. Signed-off-by: Ram Pai <[email protected]> Signed-off-by: Sandipan Das <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Acked-by: Dave Hansen <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Florian Weimer <[email protected]> Cc: "Desnes A. Nunes do Rosario" <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thiago Jung Bauermann <[email protected]> Cc: "Aneesh Kumar K.V" <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Michal Suchanek <[email protected]> Cc: Shuah Khan <[email protected]> Link: http://lkml.kernel.org/r/38b08d0318820ae46af3aa6048384fd8056c3df7.1585646528.git.sandipan@linux.ibm.com Signed-off-by: Linus Torvalds <[email protected]>
2020-06-04selftests/vm/pkeys: fix number of reserved powerpc pkeysDesnes A. Nunes do Rosario1-2/+20
The number of reserved pkeys in a PowerNV environment is different from that on PowerVM or KVM. Tested on PowerVM and PowerNV environments. Signed-off-by: "Desnes A. Nunes do Rosario" <[email protected]> Signed-off-by: Ram Pai <[email protected]> Signed-off-by: Sandipan Das <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Acked-by: Dave Hansen <[email protected]> Cc: Florian Weimer <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thiago Jung Bauermann <[email protected]> Cc: "Aneesh Kumar K.V" <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Michal Suchanek <[email protected]> Cc: Shuah Khan <[email protected]> Link: http://lkml.kernel.org/r/0341a0ca961166814b44c9e724774672c18d54ca.1585646528.git.sandipan@linux.ibm.com Signed-off-by: Linus Torvalds <[email protected]>
2020-06-04selftests/vm/pkeys: introduce powerpc supportRam Pai3-128/+234
This makes use of the abstractions added earlier and introduces support for powerpc. For powerpc, after receiving the SIGSEGV, the signal handler must explicitly restore access permissions for the faulting pkey to allow the test to continue. As this makes use of pkey_access_allow(), all of its dependencies and other similar functions have been moved ahead of the signal handler. [[email protected]: fix powerpc access right updates] Link: http://lkml.kernel.org/r/5f65cf37be993760de8112a88da194e3ccbb2bf8.1588959697.git.sandipan@linux.ibm.com Signed-off-by: Ram Pai <[email protected]> Signed-off-by: Sandipan Das <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Acked-by: Dave Hansen <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Florian Weimer <[email protected]> Cc: "Desnes A. Nunes do Rosario" <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thiago Jung Bauermann <[email protected]> Cc: "Aneesh Kumar K.V" <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Michal Suchanek <[email protected]> Cc: Shuah Khan <[email protected]> Link: http://lkml.kernel.org/r/b121e9fd33789ed9195276e32fe4e80bb6b88a31.1585646528.git.sandipan@linux.ibm.com Signed-off-by: Linus Torvalds <[email protected]>
2020-06-04selftests/vm/pkeys: introduce generic pkey abstractionsRam Pai3-6/+29
This introduces some generic abstractions and provides the corresponding architecture-specfic implementations for these abstractions. Signed-off-by: Ram Pai <[email protected]> Signed-off-by: Thiago Jung Bauermann <[email protected]> Signed-off-by: Sandipan Das <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Acked-by: Dave Hansen <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Florian Weimer <[email protected]> Cc: "Desnes A. Nunes do Rosario" <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: "Aneesh Kumar K.V" <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Michal Suchanek <[email protected]> Cc: Shuah Khan <[email protected]> Link: http://lkml.kernel.org/r/1c977915e69fb7767fb0dbd55ac7656554b15b93.1585646528.git.sandipan@linux.ibm.com Signed-off-by: Linus Torvalds <[email protected]>
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