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2023-02-09parisc: Wire up PTRACE_GETREGS/PTRACE_SETREGS for compat caseHelge Deller1-2/+13
commit 316f1f42b5cc1d95124c1f0387c867c1ba7b6d0e upstream. Wire up the missing ptrace requests PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS when running 32-bit applications on 64-bit kernels. Signed-off-by: Helge Deller <deller@gmx.de> Cc: stable@vger.kernel.org # 4.7+ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-02-09parisc: Replace hardcoded value with PRIV_USER constant in ptrace.cHelge Deller1-3/+3
commit 3f0c17809a098d3f0c1ec83f1fb3ca61638d3dcd upstream. Prefer usage of the PRIV_USER constant over the hard-coded value to set the lowest 2 bits for the userspace privilege. Signed-off-by: Helge Deller <deller@gmx.de> Cc: stable@vger.kernel.org # 5.16+ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-02-09parisc: Fix return code of pdc_iodc_print()Helge Deller1-2/+3
commit 5d1335dabb3c493a3d6d5b233953b6ac7b6c1ff2 upstream. There is an off-by-one if the printed string includes a new-line char. Cc: stable@vger.kernel.org Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-01-14parisc: Align parisc MADV_XXX constants with all other architecturesHelge Deller3-16/+43
commit 71bdea6f798b425bc0003780b13e3fdecb16a010 upstream. Adjust some MADV_XXX constants to be in sync what their values are on all other platforms. There is currently no reason to have an own numbering on parisc, but it requires workarounds in many userspace sources (e.g. glibc, qemu, ...) - which are often forgotten and thus introduce bugs and different behaviour on parisc. A wrapper avoids an ABI breakage for existing userspace applications by translating any old values to the new ones, so this change allows us to move over all programs to the new ABI over time. Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-01-07parisc: Drop PMD_SHIFT from calculation in pgtable.hHelge Deller1-2/+2
commit fe94cb1a614d2df2764d49ac959d8b7e4cb98e15 upstream. PMD_SHIFT isn't defined if CONFIG_PGTABLE_LEVELS == 3, and as such the kernel test robot found this warning: In file included from include/linux/pgtable.h:6, from arch/parisc/kernel/head.S:23: arch/parisc/include/asm/pgtable.h:169:32: warning: "PMD_SHIFT" is not defined, evaluates to 0 [-Wundef] 169 | #if (KERNEL_INITIAL_ORDER) >= (PMD_SHIFT) Avoid the warning by using PLD_SHIFT and BITS_PER_PTE. Signed-off-by: Helge Deller <deller@gmx.de> Reported-by: kernel test robot <lkp@intel.com> Cc: <stable@vger.kernel.org> # 6.0+ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-01-07parisc: Drop duplicate kgdb_pdc consoleHelge Deller1-20/+0
commit 7e6652c79ecd74e1112500668d956367dc3772a5 upstream. The kgdb console is already implemented and registered in pdc_cons.c, so the duplicate code can be dropped. Signed-off-by: Helge Deller <deller@gmx.de> Cc: <stable@vger.kernel.org> # 6.1+ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-01-07parisc: Add missing FORCE prerequisites in MakefileHelge Deller2-4/+4
commit 9086e6017957c5cd6ea28d94b70e0d513d6b7800 upstream. Fix those make warnings: arch/parisc/kernel/vdso32/Makefile:30: FORCE prerequisite is missing arch/parisc/kernel/vdso64/Makefile:30: FORCE prerequisite is missing Add the missing FORCE prerequisites for all build targets identified by "make help". Fixes: e1f86d7b4b2a5213 ("kbuild: warn if FORCE is missing for if_changed(_dep,_rule) and filechk") Signed-off-by: Helge Deller <deller@gmx.de> Cc: <stable@vger.kernel.org> # 5.18+ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-01-07parisc: Fix locking in pdc_iodc_print() firmware callHelge Deller1-11/+13
commit 7236aae5f81f3efbd93d0601e74fc05994bc2580 upstream. Utilize pdc_lock spinlock to protect parallel modifications of the iodc_dbuf[] buffer, check length to prevent buffer overflow of iodc_dbuf[], drop the iodc_retbuf[] buffer and fix some wrong indentings. Signed-off-by: Helge Deller <deller@gmx.de> Cc: <stable@vger.kernel.org> # 6.0+ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-01-07parisc: Drop locking in pdc console codeHelge Deller1-13/+3
commit 7dc4dbfe750e1f18c511e73c8ed114da8de9ff85 upstream. No need to have specific locking for console I/O since the PDC functions provide an own locking. Signed-off-by: Helge Deller <deller@gmx.de> Cc: <stable@vger.kernel.org> # 6.1+ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-10-31parisc: Avoid printing the hardware path twiceHelge Deller2-14/+12
Avoid that the hardware path is shown twice in the kernel log, and clean up the output of the version numbers to show up in the same order as they are listed in the hardware database in the hardware.c file. Additionally, optimize the memory footprint of the hardware database and mark some code as init code. Fixes: cab56b51ec0e ("parisc: Fix device names in /proc/iomem") Signed-off-by: Helge Deller <deller@gmx.de> Cc: <stable@vger.kernel.org> # v4.9+
2022-10-21parisc: Use signed char for hardware path in pdc.hHelge Deller1-23/+13
Clean up the struct for hardware_path and drop the struct device_path with a proper assignment of bc[] and mod members as signed chars. This patch prepares for the kbuild change from Jason A. Donenfeld to treat char as always unsigned. Signed-off-by: Helge Deller <deller@gmx.de> Cc: Jason A. Donenfeld <Jason@zx2c4.com>
2022-10-17Merge tag 'random-6.1-rc1-for-linus' of ↵Linus Torvalds3-4/+4
git://git.kernel.org/pub/scm/linux/kernel/git/crng/random Pull more random number generator updates from Jason Donenfeld: "This time with some large scale treewide cleanups. The intent of this pull is to clean up the way callers fetch random integers. The current rules for doing this right are: - If you want a secure or an insecure random u64, use get_random_u64() - If you want a secure or an insecure random u32, use get_random_u32() The old function prandom_u32() has been deprecated for a while now and is just a wrapper around get_random_u32(). Same for get_random_int(). - If you want a secure or an insecure random u16, use get_random_u16() - If you want a secure or an insecure random u8, use get_random_u8() - If you want secure or insecure random bytes, use get_random_bytes(). The old function prandom_bytes() has been deprecated for a while now and has long been a wrapper around get_random_bytes() - If you want a non-uniform random u32, u16, or u8 bounded by a certain open interval maximum, use prandom_u32_max() I say "non-uniform", because it doesn't do any rejection sampling or divisions. Hence, it stays within the prandom_*() namespace, not the get_random_*() namespace. I'm currently investigating a "uniform" function for 6.2. We'll see what comes of that. By applying these rules uniformly, we get several benefits: - By using prandom_u32_max() with an upper-bound that the compiler can prove at compile-time is ≤65536 or ≤256, internally get_random_u16() or get_random_u8() is used, which wastes fewer batched random bytes, and hence has higher throughput. - By using prandom_u32_max() instead of %, when the upper-bound is not a constant, division is still avoided, because prandom_u32_max() uses a faster multiplication-based trick instead. - By using get_random_u16() or get_random_u8() in cases where the return value is intended to indeed be a u16 or a u8, we waste fewer batched random bytes, and hence have higher throughput. This series was originally done by hand while I was on an airplane without Internet. Later, Kees and I worked on retroactively figuring out what could be done with Coccinelle and what had to be done manually, and then we split things up based on that. So while this touches a lot of files, the actual amount of code that's hand fiddled is comfortably small" * tag 'random-6.1-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random: prandom: remove unused functions treewide: use get_random_bytes() when possible treewide: use get_random_u32() when possible treewide: use get_random_{u8,u16}() when possible, part 2 treewide: use get_random_{u8,u16}() when possible, part 1 treewide: use prandom_u32_max() when possible, part 2 treewide: use prandom_u32_max() when possible, part 1
2022-10-14Merge tag 'parisc-for-6.1-1' of ↵Linus Torvalds8-246/+61
git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux Pull parisc updates from Helge Deller: "Fixes: - When we added basic vDSO support in kernel 5.18 we introduced a bug which prevented a mmap() of graphic card memory. This is because we used the DMB (data memory break trap bit) page flag as special-bit, but missed to clear that bit when loading the TLB. - Graphics card memory size was not correctly aligned - Spelling fixes (from Colin Ian King) Enhancements: - PDC console (which uses firmware calls) now rewritten as early console - Reduced size of alternative tables" * tag 'parisc-for-6.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: Fix spelling mistake "mis-match" -> "mismatch" in eisa driver parisc: Fix userspace graphics card breakage due to pgtable special bit parisc: fbdev/stifb: Align graphics memory size to 4MB parisc: Convert PDC console to an early console parisc: Reduce kernel size by packing alternative tables
2022-10-14parisc: Fix userspace graphics card breakage due to pgtable special bitHelge Deller2-1/+14
Commit df24e1783e6e ("parisc: Add vDSO support") introduced the vDSO support, for which a _PAGE_SPECIAL page table flag was needed. Since we wanted to keep every page table entry in 32-bits, this patch re-used the existing - but yet unused - _PAGE_DMB flag (which triggers a hardware break if a page is accessed) to store the special bit. But when graphics card memory is mmapped into userspace, the kernel uses vm_iomap_memory() which sets the the special flag. So, with the DMB bit set, every access to the graphics memory now triggered a hardware exception and segfaulted the userspace program. Fix this breakage by dropping the DMB bit when writing the page protection bits to the CPU TLB. In addition this patch adds a small optimization: if huge pages aren't configured (which is at least the case for 32-bit kernels), then the special bit is stored in the hpage (HUGE PAGE) bit instead. That way we can skip to reset the DMB bit. Fixes: df24e1783e6e ("parisc: Add vDSO support") Cc: <stable@vger.kernel.org> # 5.18+ Signed-off-by: Helge Deller <deller@gmx.de>
2022-10-12Merge tag 'mm-nonmm-stable-2022-10-11' of ↵Linus Torvalds2-7/+0
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull non-MM updates from Andrew Morton: - hfs and hfsplus kmap API modernization (Fabio Francesco) - make crash-kexec work properly when invoked from an NMI-time panic (Valentin Schneider) - ntfs bugfixes (Hawkins Jiawei) - improve IPC msg scalability by replacing atomic_t's with percpu counters (Jiebin Sun) - nilfs2 cleanups (Minghao Chi) - lots of other single patches all over the tree! * tag 'mm-nonmm-stable-2022-10-11' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (71 commits) include/linux/entry-common.h: remove has_signal comment of arch_do_signal_or_restart() prototype proc: test how it holds up with mapping'less process mailmap: update Frank Rowand email address ia64: mca: use strscpy() is more robust and safer init/Kconfig: fix unmet direct dependencies ia64: update config files nilfs2: replace WARN_ONs by nilfs_error for checkpoint acquisition failure fork: remove duplicate included header files init/main.c: remove unnecessary (void*) conversions proc: mark more files as permanent nilfs2: remove the unneeded result variable nilfs2: delete unnecessary checks before brelse() checkpatch: warn for non-standard fixes tag style usr/gen_init_cpio.c: remove unnecessary -1 values from int file ipc/msg: mitigate the lock contention with percpu counter percpu: add percpu_counter_add_local and percpu_counter_sub_local fs/ocfs2: fix repeated words in comments relay: use kvcalloc to alloc page array in relay_alloc_page_array proc: make config PROC_CHILDREN depend on PROC_FS fs: uninline inode_maybe_inc_iversion() ...
2022-10-12treewide: use get_random_u32() when possibleJason A. Donenfeld2-3/+3
The prandom_u32() function has been a deprecated inline wrapper around get_random_u32() for several releases now, and compiles down to the exact same code. Replace the deprecated wrapper with a direct call to the real function. The same also applies to get_random_int(), which is just a wrapper around get_random_u32(). This was done as a basic find and replace. Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Yury Norov <yury.norov@gmail.com> Reviewed-by: Jan Kara <jack@suse.cz> # for ext4 Acked-by: Toke Høiland-Jørgensen <toke@toke.dk> # for sch_cake Acked-by: Chuck Lever <chuck.lever@oracle.com> # for nfsd Acked-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> # for thunderbolt Acked-by: Darrick J. Wong <djwong@kernel.org> # for xfs Acked-by: Helge Deller <deller@gmx.de> # for parisc Acked-by: Heiko Carstens <hca@linux.ibm.com> # for s390 Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2022-10-12treewide: use prandom_u32_max() when possible, part 1Jason A. Donenfeld1-1/+1
Rather than incurring a division or requesting too many random bytes for the given range, use the prandom_u32_max() function, which only takes the minimum required bytes from the RNG and avoids divisions. This was done mechanically with this coccinelle script: @basic@ expression E; type T; identifier get_random_u32 =~ "get_random_int|prandom_u32|get_random_u32"; typedef u64; @@ ( - ((T)get_random_u32() % (E)) + prandom_u32_max(E) | - ((T)get_random_u32() & ((E) - 1)) + prandom_u32_max(E * XXX_MAKE_SURE_E_IS_POW2) | - ((u64)(E) * get_random_u32() >> 32) + prandom_u32_max(E) | - ((T)get_random_u32() & ~PAGE_MASK) + prandom_u32_max(PAGE_SIZE) ) @multi_line@ identifier get_random_u32 =~ "get_random_int|prandom_u32|get_random_u32"; identifier RAND; expression E; @@ - RAND = get_random_u32(); ... when != RAND - RAND %= (E); + RAND = prandom_u32_max(E); // Find a potential literal @literal_mask@ expression LITERAL; type T; identifier get_random_u32 =~ "get_random_int|prandom_u32|get_random_u32"; position p; @@ ((T)get_random_u32()@p & (LITERAL)) // Add one to the literal. @script:python add_one@ literal << literal_mask.LITERAL; RESULT; @@ value = None if literal.startswith('0x'): value = int(literal, 16) elif literal[0] in '123456789': value = int(literal, 10) if value is None: print("I don't know how to handle %s" % (literal)) cocci.include_match(False) elif value == 2**32 - 1 or value == 2**31 - 1 or value == 2**24 - 1 or value == 2**16 - 1 or value == 2**8 - 1: print("Skipping 0x%x for cleanup elsewhere" % (value)) cocci.include_match(False) elif value & (value + 1) != 0: print("Skipping 0x%x because it's not a power of two minus one" % (value)) cocci.include_match(False) elif literal.startswith('0x'): coccinelle.RESULT = cocci.make_expr("0x%x" % (value + 1)) else: coccinelle.RESULT = cocci.make_expr("%d" % (value + 1)) // Replace the literal mask with the calculated result. @plus_one@ expression literal_mask.LITERAL; position literal_mask.p; expression add_one.RESULT; identifier FUNC; @@ - (FUNC()@p & (LITERAL)) + prandom_u32_max(RESULT) @collapse_ret@ type T; identifier VAR; expression E; @@ { - T VAR; - VAR = (E); - return VAR; + return E; } @drop_var@ type T; identifier VAR; @@ { - T VAR; ... when != VAR } Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Yury Norov <yury.norov@gmail.com> Reviewed-by: KP Singh <kpsingh@kernel.org> Reviewed-by: Jan Kara <jack@suse.cz> # for ext4 and sbitmap Reviewed-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com> # for drbd Acked-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Heiko Carstens <hca@linux.ibm.com> # for s390 Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # for mmc Acked-by: Darrick J. Wong <djwong@kernel.org> # for xfs Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2022-10-11parisc: Convert PDC console to an early consoleHelge Deller4-233/+31
Rewrite the PDC console to become an early console. Beside the fact that now boot information is visible until another (text- or graphics) console takes over, this benefits as well machines with a yet-unsupported STI console and kgdb. Signed-off-by: Helge Deller <deller@gmx.de>
2022-10-11parisc: Reduce kernel size by packing alternative tablesHelge Deller2-12/+16
The values stored in the length and condition fields of the alternative tables fit into 16 bits, so we can save 4 bytes per alternative table entry. Since a typical 32-bit kernel has more than 3000 entries this saves > 12k of storage on disc. bloat-o-meter shows a reduction of -0.01% by this change: Total: Before=10196505, After=10195529, chg -0.01% $ ls -la vmlinux vmlinux.before -rwxr-xr-x 14437324 vmlinux -rwxr-xr-x 14449512 vmlinux.before Signed-off-by: Helge Deller <deller@gmx.de>
2022-10-11Merge tag 'mm-stable-2022-10-08' of ↵Linus Torvalds2-2/+9
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull MM updates from Andrew Morton: - Yu Zhao's Multi-Gen LRU patches are here. They've been under test in linux-next for a couple of months without, to my knowledge, any negative reports (or any positive ones, come to that). - Also the Maple Tree from Liam Howlett. An overlapping range-based tree for vmas. It it apparently slightly more efficient in its own right, but is mainly targeted at enabling work to reduce mmap_lock contention. Liam has identified a number of other tree users in the kernel which could be beneficially onverted to mapletrees. Yu Zhao has identified a hard-to-hit but "easy to fix" lockdep splat at [1]. This has yet to be addressed due to Liam's unfortunately timed vacation. He is now back and we'll get this fixed up. - Dmitry Vyukov introduces KMSAN: the Kernel Memory Sanitizer. It uses clang-generated instrumentation to detect used-unintialized bugs down to the single bit level. KMSAN keeps finding bugs. New ones, as well as the legacy ones. - Yang Shi adds a userspace mechanism (madvise) to induce a collapse of memory into THPs. - Zach O'Keefe has expanded Yang Shi's madvise(MADV_COLLAPSE) to support file/shmem-backed pages. - userfaultfd updates from Axel Rasmussen - zsmalloc cleanups from Alexey Romanov - cleanups from Miaohe Lin: vmscan, hugetlb_cgroup, hugetlb and memory-failure - Huang Ying adds enhancements to NUMA balancing memory tiering mode's page promotion, with a new way of detecting hot pages. - memcg updates from Shakeel Butt: charging optimizations and reduced memory consumption. - memcg cleanups from Kairui Song. - memcg fixes and cleanups from Johannes Weiner. - Vishal Moola provides more folio conversions - Zhang Yi removed ll_rw_block() :( - migration enhancements from Peter Xu - migration error-path bugfixes from Huang Ying - Aneesh Kumar added ability for a device driver to alter the memory tiering promotion paths. For optimizations by PMEM drivers, DRM drivers, etc. - vma merging improvements from Jakub Matěn. - NUMA hinting cleanups from David Hildenbrand. - xu xin added aditional userspace visibility into KSM merging activity. - THP & KSM code consolidation from Qi Zheng. - more folio work from Matthew Wilcox. - KASAN updates from Andrey Konovalov. - DAMON cleanups from Kaixu Xia. - DAMON work from SeongJae Park: fixes, cleanups. - hugetlb sysfs cleanups from Muchun Song. - Mike Kravetz fixes locking issues in hugetlbfs and in hugetlb core. Link: https://lkml.kernel.org/r/CAOUHufZabH85CeUN-MEMgL8gJGzJEWUrkiM58JkTbBhh-jew0Q@mail.gmail.com [1] * tag 'mm-stable-2022-10-08' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (555 commits) hugetlb: allocate vma lock for all sharable vmas hugetlb: take hugetlb vma_lock when clearing vma_lock->vma pointer hugetlb: fix vma lock handling during split vma and range unmapping mglru: mm/vmscan.c: fix imprecise comments mm/mglru: don't sync disk for each aging cycle mm: memcontrol: drop dead CONFIG_MEMCG_SWAP config symbol mm: memcontrol: use do_memsw_account() in a few more places mm: memcontrol: deprecate swapaccounting=0 mode mm: memcontrol: don't allocate cgroup swap arrays when memcg is disabled mm/secretmem: remove reduntant return value mm/hugetlb: add available_huge_pages() func mm: remove unused inline functions from include/linux/mm_inline.h selftests/vm: add selftest for MADV_COLLAPSE of uffd-minor memory selftests/vm: add file/shmem MADV_COLLAPSE selftest for cleared pmd selftests/vm: add thp collapse shmem testing selftests/vm: add thp collapse file and tmpfs testing selftests/vm: modularize thp collapse memory operations selftests/vm: dedup THP helpers mm/khugepaged: add tracepoint to hpage_collapse_scan_file() mm/madvise: add file and shmem support to MADV_COLLAPSE ...
2022-10-10Merge tag 'kbuild-v6.1' of ↵Linus Torvalds2-4/+2
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - Remove potentially incomplete targets when Kbuid is interrupted by SIGINT etc in case GNU Make may miss to do that when stderr is piped to another program. - Rewrite the single target build so it works more correctly. - Fix rpm-pkg builds with V=1. - List top-level subdirectories in ./Kbuild. - Ignore auto-generated __kstrtab_* and __kstrtabns_* symbols in kallsyms. - Avoid two different modules in lib/zstd/ having shared code, which potentially causes building the common code as build-in and modular back-and-forth. - Unify two modpost invocations to optimize the build process. - Remove head-y syntax in favor of linker scripts for placing particular sections in the head of vmlinux. - Bump the minimal GNU Make version to 3.82. - Clean up misc Makefiles and scripts. * tag 'kbuild-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (41 commits) docs: bump minimal GNU Make version to 3.82 ia64: simplify esi object addition in Makefile Revert "kbuild: Check if linker supports the -X option" kbuild: rebuild .vmlinux.export.o when its prerequisite is updated kbuild: move modules.builtin(.modinfo) rules to Makefile.vmlinux_o zstd: Fixing mixed module-builtin objects kallsyms: ignore __kstrtab_* and __kstrtabns_* symbols kallsyms: take the input file instead of reading stdin kallsyms: drop duplicated ignore patterns from kallsyms.c kbuild: reuse mksysmap output for kallsyms mksysmap: update comment about __crc_* kbuild: remove head-y syntax kbuild: use obj-y instead extra-y for objects placed at the head kbuild: hide error checker logs for V=1 builds kbuild: re-run modpost when it is updated kbuild: unify two modpost invocations kbuild: move vmlinux.o rule to the top Makefile kbuild: move .vmlinux.objs rule to Makefile.modpost kbuild: list sub-directories in ./Kbuild Makefile.compiler: replace cc-ifversion with compiler-specific macros ...
2022-10-08Merge tag 'tty-6.1-rc1' of ↵Linus Torvalds2-96/+0
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial driver updates from Greg KH: "Here is the big set of TTY and Serial driver updates for 6.1-rc1. Lots of cleanups in here, no real new functionality this time around, with the diffstat being that we removed more lines than we added! Included in here are: - termios unification cleanups from Al Viro, it's nice to finally get this work done - tty serial transmit cleanups in various drivers in preparation for more cleanup and unification in future releases (that work was not ready for this release) - n_gsm fixes and updates - ktermios cleanups and code reductions - dt bindings json conversions and updates for new devices - some serial driver updates for new devices - lots of other tiny cleanups and janitorial stuff. Full details in the shortlog. All of these have been in linux-next for a while with no reported issues" * tag 'tty-6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (102 commits) serial: cpm_uart: Don't request IRQ too early for console port tty: serial: do unlock on a common path in altera_jtaguart_console_putc() tty: serial: unify TX space reads under altera_jtaguart_tx_space() tty: serial: use FIELD_GET() in lqasc_tx_ready() tty: serial: extend lqasc_tx_ready() to lqasc_console_putchar() tty: serial: allow pxa.c to be COMPILE_TESTed serial: stm32: Fix unused-variable warning tty: serial: atmel: Add COMMON_CLK dependency to SERIAL_ATMEL serial: 8250: Fix restoring termios speed after suspend serial: Deassert Transmit Enable on probe in driver-specific way serial: 8250_dma: Convert to use uart_xmit_advance() serial: 8250_omap: Convert to use uart_xmit_advance() MAINTAINERS: Solve warning regarding inexistent atmel-usart binding serial: stm32: Deassert Transmit Enable on ->rs485_config() serial: ar933x: Deassert Transmit Enable on ->rs485_config() tty: serial: atmel: Use FIELD_PREP/FIELD_GET tty: serial: atmel: Make the driver aware of the existence of GCLK tty: serial: atmel: Only divide Clock Divisor if the IP is USART tty: serial: atmel: Separate mode clearing between UART and USART dt-bindings: serial: atmel,at91-usart: Add gclk as a possible USART clock ...
2022-10-06Merge tag 'asm-generic-6.1' of ↵Linus Torvalds2-127/+67
git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic Pull asm-generic updates from Arnd Bergmann: "This contains a series from Linus Walleij to unify the linux/io.h interface by making the ia64, alpha, parisc and sparc include asm-generic/io.h. All functions provided by the generic header are now available to all drivers, but the architectures can still override this. For the moment, mips and sh still don't include asm-generic/io.h but provide a full set of functions themselves. There are also a few minor cleanups unrelated to this" * tag 'asm-generic-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: alpha: add full ioread64/iowrite64 implementation parisc: Drop homebrewn io[read|write]64_[lo_hi|hi_lo] parisc: hide ioread64 declaration on 32-bit ia64: export memory_add_physaddr_to_nid to fix cxl build error asm-generic: Remove empty #ifdef SA_RESTORER parisc: Use the generic IO helpers parisc: Remove 64bit access on 32bit machines sparc: Fix the generic IO helpers alpha: Use generic <asm-generic/io.h>
2022-10-02kbuild: remove head-y syntaxMasahiro Yamada1-2/+0
Kbuild puts the objects listed in head-y at the head of vmlinux. Conventionally, we do this for head*.S, which contains the kernel entry point. A counter approach is to control the section order by the linker script. Actually, the code marked as __HEAD goes into the ".head.text" section, which is placed before the normal ".text" section. I do not know if both of them are needed. From the build system perspective, head-y is not mandatory. If you can achieve the proper code placement by the linker script only, it would be cleaner. I collected the current head-y objects into head-object-list.txt. It is a whitelist. My hope is it will be reduced in the long run. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
2022-10-02kbuild: use obj-y instead extra-y for objects placed at the headMasahiro Yamada1-2/+2
The objects placed at the head of vmlinux need special treatments: - arch/$(SRCARCH)/Makefile adds them to head-y in order to place them before other archives in the linker command line. - arch/$(SRCARCH)/kernel/Makefile adds them to extra-y instead of obj-y to avoid them going into built-in.a. This commit gets rid of the latter. Create vmlinux.a to collect all the objects that are unconditionally linked to vmlinux. The objects listed in head-y are moved to the head of vmlinux.a by using 'ar m'. With this, arch/$(SRCARCH)/kernel/Makefile can consistently use obj-y for builtin objects. There is no *.o that is directly linked to vmlinux. Drop unneeded code in scripts/clang-tools/gen_compile_commands.py. $(AR) mPi needs 'T' to workaround the llvm-ar bug. The fix was suggested by Nathan Chancellor [1]. [1]: https://lore.kernel.org/llvm/YyjjT5gQ2hGMH0ni@dev-arch.thelio-3990X/ Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
2022-09-27parisc: remove mmap linked list from cache handlingMatthew Wilcox (Oracle)1-2/+7
Use the VMA iterator instead. Link: https://lkml.kernel.org/r/20220906194824.2110408-33-Liam.Howlett@oracle.com Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Davidlohr Bueso <dave@stgolabs.net> Tested-by: Yu Zhao <yuzhao@google.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: David Hildenbrand <david@redhat.com> Cc: David Howells <dhowells@redhat.com> Cc: SeongJae Park <sj@kernel.org> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-09-25Merge 7e2cd21e02b3 ("Merge tag 'tty-6.0-rc7' of ↵Greg Kroah-Hartman2-2/+12
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty") into tty-next We need the tty fixes and api additions in this branch. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-23parisc: Drop homebrewn io[read|write]64_[lo_hi|hi_lo]Linus Walleij1-36/+0
The parisc implements ioread64_lo_hi(), ioread64_hi_lo() iowrite64_lo_hi() and iowrite64_hi_lo() while we already have a perfectly working generic version in the generic portable assembly in <linux/io-64-nonatomic-hi-lo.h>. Drop the custom versions in favor for the defaults. Fixes: 77bfc8bdb5a1 ("parisc: Remove 64bit access on 32bit machines") Cc: Arnd Bergmann <arnd@arndb.de> Acked-by: Helge Deller <deller@gmx.de> Reported-by: Helge Deller <deller@gmx.de> Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-09-15parisc: Allow CONFIG_64BIT with ARCH=pariscHelge Deller1-1/+11
The previous patch triggered a build failure for the debian kernel, which has CONFIG_64BIT enabled, uses the CROSS_COMPILER environment variable and uses ARCH=parisc to configure the kernel for 64-bit support. This patch weakens the previous patch while keeping the recommended way to configure the kernel with: ARCH=parisc -> build 32-bit kernel ARCH=parisc64 -> build 64-bit kernel while adding the possibility for debian to configure a 64-bit kernel even if ARCH=parisc is set (PA8X00 CPU has to be selected and CONFIG_64BIT needs to be enabled). The downside of this patch is, that we now have a small window open again where people may get it wrong: if they enable CONFIG_64BIT and try to compile with a 32-bit compiler. Fixes: 3dcfb729b5f4 ("parisc: Make CONFIG_64BIT available for ARCH=parisc64 only") Signed-off-by: Helge Deller <deller@gmx.de> Cc: <stable@vger.kernel.org> # 5.15+
2022-09-12parisc: hide ioread64 declaration on 32-bitArnd Bergmann1-0/+2
The definition of ioread64 etc is hidden on 32-bit, but the declaration remained by accident, which led to the generic definition getting left out: ERROR: modpost: "ioread64" [drivers/pci/switch/switchtec.ko] undefined! Hide the declaration and #define under the same #ifdef. Reported-by: kernel test robot <lkp@intel.com> Fixes: 77bfc8bdb5a1 ("parisc: Remove 64bit access on 32bit machines") Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-09-12kernel: exit: cleanup release_thread()Kefeng Wang2-7/+0
Only x86 has own release_thread(), introduce a new weak release_thread() function to clean empty definitions in other ARCHs. Link: https://lkml.kernel.org/r/20220819014406.32266-1-wangkefeng.wang@huawei.com Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Acked-by: Guo Ren <guoren@kernel.org> [csky] Acked-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Brian Cain <bcain@quicinc.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> [powerpc] Acked-by: Stafford Horne <shorne@gmail.com> [openrisc] Acked-by: Catalin Marinas <catalin.marinas@arm.com> [arm64] Acked-by: Huacai Chen <chenhuacai@kernel.org> [LoongArch] Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Chris Zankel <chris@zankel.net> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Dinh Nguyen <dinguyen@kernel.org> Cc: Guo Ren <guoren@kernel.org> [csky] Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Jonas Bonn <jonas@southpole.se> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Richard Henderson <richard.henderson@linaro.org> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Vineet Gupta <vgupta@kernel.org> Cc: Will Deacon <will@kernel.org> Cc: Xuerui Wang <kernel@xen0n.name> Cc: Yoshinori Sato <ysato@users.osdn.me> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-09-12mm/madvise: introduce MADV_COLLAPSE sync hugepage collapseZach O'Keefe1-0/+2
This idea was introduced by David Rientjes[1]. Introduce a new madvise mode, MADV_COLLAPSE, that allows users to request a synchronous collapse of memory at their own expense. The benefits of this approach are: * CPU is charged to the process that wants to spend the cycles for the THP * Avoid unpredictable timing of khugepaged collapse Semantics This call is independent of the system-wide THP sysfs settings, but will fail for memory marked VM_NOHUGEPAGE. If the ranges provided span multiple VMAs, the semantics of the collapse over each VMA is independent from the others. This implies a hugepage cannot cross a VMA boundary. If collapse of a given hugepage-aligned/sized region fails, the operation may continue to attempt collapsing the remainder of memory specified. The memory ranges provided must be page-aligned, but are not required to be hugepage-aligned. If the memory ranges are not hugepage-aligned, the start/end of the range will be clamped to the first/last hugepage-aligned address covered by said range. The memory ranges must span at least one hugepage-sized region. All non-resident pages covered by the range will first be swapped/faulted-in, before being internally copied onto a freshly allocated hugepage. Unmapped pages will have their data directly initialized to 0 in the new hugepage. However, for every eligible hugepage aligned/sized region to-be collapsed, at least one page must currently be backed by memory (a PMD covering the address range must already exist). Allocation for the new hugepage may enter direct reclaim and/or compaction, regardless of VMA flags. When the system has multiple NUMA nodes, the hugepage will be allocated from the node providing the most native pages. This operation operates on the current state of the specified process and makes no persistent changes or guarantees on how pages will be mapped, constructed, or faulted in the future Return Value If all hugepage-sized/aligned regions covered by the provided range were either successfully collapsed, or were already PMD-mapped THPs, this operation will be deemed successful. On success, process_madvise(2) returns the number of bytes advised, and madvise(2) returns 0. Else, -1 is returned and errno is set to indicate the error for the most-recently attempted hugepage collapse. Note that many failures might have occurred, since the operation may continue to collapse in the event a single hugepage-sized/aligned region fails. ENOMEM Memory allocation failed or VMA not found EBUSY Memcg charging failed EAGAIN Required resource temporarily unavailable. Try again might succeed. EINVAL Other error: No PMD found, subpage doesn't have Present bit set, "Special" page no backed by struct page, VMA incorrectly sized, address not page-aligned, ... Most notable here is ENOMEM and EBUSY (new to madvise) which are intended to provide the caller with actionable feedback so they may take an appropriate fallback measure. Use Cases An immediate user of this new functionality are malloc() implementations that manage memory in hugepage-sized chunks, but sometimes subrelease memory back to the system in native-sized chunks via MADV_DONTNEED; zapping the pmd. Later, when the memory is hot, the implementation could madvise(MADV_COLLAPSE) to re-back the memory by THPs to regain hugepage coverage and dTLB performance. TCMalloc is such an implementation that could benefit from this[2]. Only privately-mapped anon memory is supported for now, but additional support for file, shmem, and HugeTLB high-granularity mappings[2] is expected. File and tmpfs/shmem support would permit: * Backing executable text by THPs. Current support provided by CONFIG_READ_ONLY_THP_FOR_FS may take a long time on a large system which might impair services from serving at their full rated load after (re)starting. Tricks like mremap(2)'ing text onto anonymous memory to immediately realize iTLB performance prevents page sharing and demand paging, both of which increase steady state memory footprint. With MADV_COLLAPSE, we get the best of both worlds: Peak upfront performance and lower RAM footprints. * Backing guest memory by hugapages after the memory contents have been migrated in native-page-sized chunks to a new host, in a userfaultfd-based live-migration stack. [1] https://lore.kernel.org/linux-mm/d098c392-273a-36a4-1a29-59731cdf5d3d@google.com/ [2] https://github.com/google/tcmalloc/tree/master/tcmalloc [jrdr.linux@gmail.com: avoid possible memory leak in failure path] Link: https://lkml.kernel.org/r/20220713024109.62810-1-jrdr.linux@gmail.com [zokeefe@google.com add missing kfree() to madvise_collapse()] Link: https://lore.kernel.org/linux-mm/20220713024109.62810-1-jrdr.linux@gmail.com/ Link: https://lkml.kernel.org/r/20220713161851.1879439-1-zokeefe@google.com [zokeefe@google.com: delay computation of hpage boundaries until use]] Link: https://lkml.kernel.org/r/20220720140603.1958773-4-zokeefe@google.com Link: https://lkml.kernel.org/r/20220706235936.2197195-10-zokeefe@google.com Signed-off-by: Zach O'Keefe <zokeefe@google.com> Signed-off-by: "Souptick Joarder (HPE)" <jrdr.linux@gmail.com> Suggested-by: David Rientjes <rientjes@google.com> Cc: Alex Shi <alex.shi@linux.alibaba.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Axel Rasmussen <axelrasmussen@google.com> Cc: Chris Kennelly <ckennelly@google.com> Cc: Chris Zankel <chris@zankel.net> Cc: David Hildenbrand <david@redhat.com> Cc: Helge Deller <deller@gmx.de> Cc: Hugh Dickins <hughd@google.com> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Miaohe Lin <linmiaohe@huawei.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Pasha Tatashin <pasha.tatashin@soleen.com> Cc: Pavel Begunkov <asml.silence@gmail.com> Cc: Peter Xu <peterx@redhat.com> Cc: Rongwei Wang <rongwei.wang@linux.alibaba.com> Cc: SeongJae Park <sj@kernel.org> Cc: Song Liu <songliubraving@fb.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Yang Shi <shy828301@gmail.com> Cc: Zi Yan <ziy@nvidia.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-09-10parisc: Use the generic IO helpersLinus Walleij1-89/+43
This enables the parisc to use <asm-generic/io.h> to fill in the missing (undefined) [read|write]sq I/O accessor functions. This is needed if parisc[64] ever wants to uses CONFIG_REGMAP_MMIO which has been patches to use accelerated _noinc accessors such as readsq/writesq that parisc64, while being a 64bit platform, as of now not yet provide. This comes with the requirement that everything the architecture already provides needs to be defined, rather than just being, say, static inline functions. Bite the bullet and just provide the definitions and make it work. Compile-tested on parisc32 and parisc64. Drop some of the __raw functions that now get implemented in <asm-generic/io.h>. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Cc: James E.J. Bottomley <James.Bottomley@HansenPartnership.com> Cc: Helge Deller <deller@gmx.de> Cc: linux-parisc@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: Mark Brown <broonie@kernel.org> Cc: John David Anglin <dave.anglin@bell.net> Link: https://lore.kernel.org/linux-arm-kernel/62fcc351.hAyADB%2FY8JTxz+kh%25lkp@intel.com/ Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-09-10parisc: Remove 64bit access on 32bit machinesLinus Walleij1-2/+22
The parisc was using some readq/writeq accessors without special considerations as to what will happen on 32bit CPUs if you do this. Maybe we have been lucky that it "just worked" on 32bit due to the compiler behaviour, or the code paths were never executed. Fix the two offending code sites like this: arch/parisc/lib/iomap.c: - Put ifdefs around the 64bit accessors and make sure that ioread64, ioread64be, iowrite64 and iowrite64be are not available on 32bit builds. - Also fold in a bug fix where 64bit access was by mistake using 32bit writel() accessors rather than 64bit writeq(). drivers/parisc/sba_iommu.c: - Access any 64bit registers using _lo_hi-semantics by way of the readq and writeq operations provided by <linux/io-64-nonatomic-lo-hi.h> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Cc: James E.J. Bottomley <James.Bottomley@HansenPartnership.com> Cc: Helge Deller <deller@gmx.de> Cc: linux-parisc@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: Arnd Bergmann <arnd@arndb.de> Cc: John David Anglin <dave.anglin@bell.net> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-09-09termios: kill uapi termios.h that are identical to generic oneAl Viro1-44/+0
mandatory-y will have the generic picked for architectures that don't have uapi/asm/termios.h of their own. ia64, parisc and s390 ones are identical to generic, so... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Link: https://lore.kernel.org/r/YxGVXpS2dWoTwoa0@ZenIV Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-09termios: get rid of non-UAPI asm/termios.hAl Viro1-7/+0
All non-UAPI asm/termios.h consist of include of UAPI counterpart and, possibly, include of linux/uaccess.h The latter can't be simply removed, even though nothing in linux/termios.h doesn't depend upon it anymore - there are several places that rely upon that indirect chain of includes to pull linux/uaccess.h. So the include needs to be lifted out of there - we lift into tty_driver.h, serdev.h and places that pull asm/termios.h, but none of * linux/uaccess.h (obvious) * net/sock.h (pulls uaccess.h) * linux/{tty,tty_driver,serdev}.h (tty.h pulls tty_driver.h) That leaves us just with the include of UAPI asm/termios.h, which is what <asm/termios.h> will resolve to if we simply remove non-UAPI header. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Link: https://lore.kernel.org/r/YxDnKvYCHn/ogBUv@ZenIV Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-09termios: start unifying non-UAPI parts of asm/termios.hAl Viro1-16/+0
* new header (linut/termios_internal.h), pulled by the users of those suckers * defaults for INIT_C_CC and externs for conversion helpers moved over there * remove termios-base.h (empty now) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Link: https://lore.kernel.org/r/YxDmptU7dNGZ+/Hn@ZenIV Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-09termios: uninline conversion helpersAl Viro1-35/+6
default go into drivers/tty/tty_ioctl.c, unusual - into arch/*/kernel/termios.c (only alpha and sparc have those). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Link: https://lore.kernel.org/r/YxDmeUBHo0s/Ew8b@ZenIV Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-05asm-generic: Conditionally enable do_softirq_own_stack() via Kconfig.Sebastian Andrzej Siewior1-1/+1
Remove the CONFIG_PREEMPT_RT symbol from the ifdef around do_softirq_own_stack() and move it to Kconfig instead. Enable softirq stacks based on SOFTIRQ_ON_OWN_STACK which depends on HAVE_SOFTIRQ_ON_OWN_STACK and its default value is set to !PREEMPT_RT. This ensures that softirq stacks are not used on PREEMPT_RT and avoids a 'select' statement on an option which has a 'depends' statement. Link: https://lore.kernel.org/YvN5E%2FPrHfUhggr7@linutronix.de Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-08-22parisc: Add runtime check to prevent PA2.0 kernels on PA1.x machinesHelge Deller1-1/+42
If a 32-bit kernel was compiled for PA2.0 CPUs, it won't be able to run on machines with PA1.x CPUs. Add a check and bail out early if a PA1.x machine is detected. Signed-off-by: Helge Deller <deller@gmx.de>
2022-08-22Revert "parisc: Show error if wrong 32/64-bit compiler is being used"Helge Deller1-8/+0
This reverts commit b160628e9ebcdc85d0db9d7f423c26b3c7c179d0. There is no need any longer to have this sanity check, because the previous commit ("parisc: Make CONFIG_64BIT available for ARCH=parisc64 only") prevents that CONFIG_64BIT is set if ARCH==parisc. Signed-off-by: Helge Deller <deller@gmx.de>
2022-08-22parisc: Make CONFIG_64BIT available for ARCH=parisc64 onlyHelge Deller1-15/+6
With this patch the ARCH= parameter decides if the CONFIG_64BIT option will be set or not. This means, the ARCH= parameter will give: ARCH=parisc -> 32-bit kernel ARCH=parisc64 -> 64-bit kernel This simplifies the usage of the other config options like randconfig, allmodconfig and allyesconfig a lot and produces the output which is expected for parisc64 (64-bit) vs. parisc (32-bit). Suggested-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Helge Deller <deller@gmx.de> Tested-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Cc: <stable@vger.kernel.org> # 5.15+
2022-08-21parisc: Fix exception handler for fldw and fstw instructionsHelge Deller1-1/+1
The exception handler is broken for unaligned memory acceses with fldw and fstw instructions, because it trashes or uses randomly some other floating point register than the one specified in the instruction word on loads and stores. The instruction "fldw 0(addr),%fr22L" (and the other fldw/fstw instructions) encode the target register (%fr22) in the rightmost 5 bits of the instruction word. The 7th rightmost bit of the instruction word defines if the left or right half of %fr22 should be used. While processing unaligned address accesses, the FR3() define is used to extract the offset into the local floating-point register set. But the calculation in FR3() was buggy, so that for example instead of %fr22, register %fr12 [((22 * 2) & 0x1f) = 12] was used. This bug has been since forever in the parisc kernel and I wonder why it wasn't detected earlier. Interestingly I noticed this bug just because the libime debian package failed to build on *native* hardware, while it successfully built in qemu. This patch corrects the bitshift and masking calculation in FR3(). Signed-off-by: Helge Deller <deller@gmx.de> Cc: <stable@vger.kernel.org>
2022-08-07Merge tag 'mm-nonmm-stable-2022-08-06-2' of ↵Linus Torvalds1-7/+0
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull misc updates from Andrew Morton: "Updates to various subsystems which I help look after. lib, ocfs2, fatfs, autofs, squashfs, procfs, etc. A relatively small amount of material this time" * tag 'mm-nonmm-stable-2022-08-06-2' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (72 commits) scripts/gdb: ensure the absolute path is generated on initial source MAINTAINERS: kunit: add David Gow as a maintainer of KUnit mailmap: add linux.dev alias for Brendan Higgins mailmap: update Kirill's email profile: setup_profiling_timer() is moslty not implemented ocfs2: fix a typo in a comment ocfs2: use the bitmap API to simplify code ocfs2: remove some useless functions lib/mpi: fix typo 'the the' in comment proc: add some (hopefully) insightful comments bdi: remove enum wb_congested_state kernel/hung_task: fix address space of proc_dohung_task_timeout_secs lib/lzo/lzo1x_compress.c: replace ternary operator with min() and min_t() squashfs: support reading fragments in readahead call squashfs: implement readahead squashfs: always build "file direct" version of page actor Revert "squashfs: provide backing_dev_info in order to disable read-ahead" fs/ocfs2: Fix spelling typo in comment ia64: old_rr4 added under CONFIG_HUGETLB_PAGE proc: fix test for "vsyscall=xonly" boot option ...
2022-08-06Merge tag 'mm-stable-2022-08-03' of ↵Linus Torvalds4-25/+31
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull MM updates from Andrew Morton: "Most of the MM queue. A few things are still pending. Liam's maple tree rework didn't make it. This has resulted in a few other minor patch series being held over for next time. Multi-gen LRU still isn't merged as we were waiting for mapletree to stabilize. The current plan is to merge MGLRU into -mm soon and to later reintroduce mapletree, with a view to hopefully getting both into 6.1-rc1. Summary: - The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe Lin, Yang Shi, Anshuman Khandual and Mike Rapoport - Some kmemleak fixes from Patrick Wang and Waiman Long - DAMON updates from SeongJae Park - memcg debug/visibility work from Roman Gushchin - vmalloc speedup from Uladzislau Rezki - more folio conversion work from Matthew Wilcox - enhancements for coherent device memory mapping from Alex Sierra - addition of shared pages tracking and CoW support for fsdax, from Shiyang Ruan - hugetlb optimizations from Mike Kravetz - Mel Gorman has contributed some pagealloc changes to improve latency and realtime behaviour. - mprotect soft-dirty checking has been improved by Peter Xu - Many other singleton patches all over the place" [ XFS merge from hell as per Darrick Wong in https://lore.kernel.org/all/YshKnxb4VwXycPO8@magnolia/ ] * tag 'mm-stable-2022-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (282 commits) tools/testing/selftests/vm/hmm-tests.c: fix build mm: Kconfig: fix typo mm: memory-failure: convert to pr_fmt() mm: use is_zone_movable_page() helper hugetlbfs: fix inaccurate comment in hugetlbfs_statfs() hugetlbfs: cleanup some comments in inode.c hugetlbfs: remove unneeded header file hugetlbfs: remove unneeded hugetlbfs_ops forward declaration hugetlbfs: use helper macro SZ_1{K,M} mm: cleanup is_highmem() mm/hmm: add a test for cross device private faults selftests: add soft-dirty into run_vmtests.sh selftests: soft-dirty: add test for mprotect mm/mprotect: fix soft-dirty check in can_change_pte_writable() mm: memcontrol: fix potential oom_lock recursion deadlock mm/gup.c: fix formatting in check_and_migrate_movable_page() xfs: fail dax mount if reflink is enabled on a partition mm/memcontrol.c: remove the redundant updating of stats_flush_threshold userfaultfd: don't fail on unrecognized features hugetlb_cgroup: fix wrong hugetlb cgroup numa stat ...
2022-08-05Merge tag 'asm-generic-6.0' of ↵Linus Torvalds4-5/+4
git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic Pull asm-generic updates from Arnd Bergmann: "There are three independent sets of changes: - Sai Prakash Ranjan adds tracing support to the asm-generic version of the MMIO accessors, which is intended to help understand problems with device drivers and has been part of Qualcomm's vendor kernels for many years - A patch from Sebastian Siewior to rework the handling of IRQ stacks in softirqs across architectures, which is needed for enabling PREEMPT_RT - The last patch to remove the CONFIG_VIRT_TO_BUS option and some of the code behind that, after the last users of this old interface made it in through the netdev, scsi, media and staging trees" * tag 'asm-generic-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: uapi: asm-generic: fcntl: Fix typo 'the the' in comment arch/*/: remove CONFIG_VIRT_TO_BUS soc: qcom: geni: Disable MMIO tracing for GENI SE serial: qcom_geni_serial: Disable MMIO tracing for geni serial asm-generic/io: Add logging support for MMIO accessors KVM: arm64: Add a flag to disable MMIO trace for nVHE KVM lib: Add register read/write tracing support drm/meson: Fix overflow implicit truncation warnings irqchip/tegra: Fix overflow implicit truncation warnings coresight: etm4x: Use asm-generic IO memory barriers arm64: io: Use asm-generic high level MMIO accessors arch/*: Disable softirq stacks on PREEMPT_RT.
2022-08-05Merge tag 'for-5.20/parisc-1' of ↵Linus Torvalds7-20/+13
git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux Pull parisc updates from Helge Deller: "One real bugfix to change the io_pgetevents_time64() syscall to use the compat implementation when running in compat mode, otherwise the signed int32 parameters min_nr and nr will be incorrectly handled as unsigned int64 values. Other than that just small cleanups: - hardware database housekeeping and proper /proc/iomem output - add proper function exit code if probe functions fail - drop stale variables (pa_swapper_pg_lock) - drop unneccessary zero-initializations - typo fixes in comments" * tag 'for-5.20/parisc-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: Input: gscps2 - check return value of ioremap() in gscps2_probe() parisc: io_pgetevents_time64() needs compat syscall in 32-bit compat mode parisc: Drop zero variable initialisations in mm/init.c parisc: Do not initialise statics to 0 parisc: Check the return value of ioremap() in lba_driver_probe() parisc: Drop pa_swapper_pg_lock spinlock parisc: Fix comment typo in fault.c parisc: Fix device names in /proc/iomem parisc: Clean up names in hardware database
2022-08-05Merge tag 'pci-v5.20-changes' of ↵Linus Torvalds2-11/+0
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull pci updates from Bjorn Helgaas: "Enumeration: - Consolidate duplicated 'next function' scanning and extend to allow 'isolated functions' on s390, similar to existing hypervisors (Niklas Schnelle) Resource management: - Implement pci_iobar_pfn() for sparc, which allows us to remove the sparc-specific pci_mmap_page_range() and pci_mmap_resource_range(). This removes the ability to map the entire PCI I/O space using /proc/bus/pci, but we believe that's already been broken since v2.6.28 (Arnd Bergmann) - Move common PCI definitions to asm-generic/pci.h and rework others to be be more specific and more encapsulated in arches that need them (Stafford Horne) Power management: - Convert drivers to new *_PM_OPS macros to avoid need for '#ifdef CONFIG_PM_SLEEP' or '__maybe_unused' (Bjorn Helgaas) Virtualization: - Add ACS quirk for Broadcom BCM5750x multifunction NICs that isolate the functions but don't advertise an ACS capability (Pavan Chebbi) Error handling: - Clear PCI Status register during enumeration in case firmware left errors logged (Kai-Heng Feng) - When we have native control of AER, enable error reporting for all devices that support AER. Previously only a few drivers enabled this (Stefan Roese) - Keep AER error reporting enabled for switches. Previously we enabled this during enumeration but immediately disabled it (Stefan Roese) - Iterate over error counters instead of error strings to avoid printing junk in AER sysfs counters (Mohamed Khalfella) ASPM: - Remove pcie_aspm_pm_state_change() so ASPM config changes, e.g., via sysfs, are not lost across power state changes (Kai-Heng Feng) Endpoint framework: - Don't stop an EPC when unbinding an EPF from it (Shunsuke Mie) Endpoint embedded DMA controller driver: - Simplify and clean up support for the DesignWare embedded DMA (eDMA) controller (Frank Li, Serge Semin) Broadcom STB PCIe controller driver: - Avoid config space accesses when link is down because we can't recover from the CPU aborts these cause (Jim Quinlan) - Look for power regulators described under Root Ports in DT and enable them before scanning the secondary bus (Jim Quinlan) - Disable/enable regulators in suspend/resume (Jim Quinlan) Freescale i.MX6 PCIe controller driver: - Simplify and clean up clock and PHY management (Richard Zhu) - Disable/enable regulators in suspend/resume (Richard Zhu) - Set PCIE_DBI_RO_WR_EN before writing DBI registers (Richard Zhu) - Allow speeds faster than Gen2 (Richard Zhu) - Make link being down a non-fatal error so controller probe doesn't fail if there are no Endpoints connected (Richard Zhu) Loongson PCIe controller driver: - Add ACPI and MCFG support for Loongson LS7A (Huacai Chen) - Avoid config reads to non-existent LS2K/LS7A devices because a hardware defect causes machine hangs (Huacai Chen) - Work around LS7A integrated devices that report incorrect Interrupt Pin values (Jianmin Lv) Marvell Aardvark PCIe controller driver: - Add support for AER and Slot capability on emulated bridge (Pali Rohár) MediaTek PCIe controller driver: - Add Airoha EN7532 to DT binding (John Crispin) - Allow building of driver for ARCH_AIROHA (Felix Fietkau) MediaTek PCIe Gen3 controller driver: - Print decoded LTSSM state when the link doesn't come up (Jianjun Wang) NVIDIA Tegra194 PCIe controller driver: - Convert DT binding to json-schema (Vidya Sagar) - Add DT bindings and driver support for Tegra234 Root Port and Endpoint mode (Vidya Sagar) - Fix some Root Port interrupt handling issues (Vidya Sagar) - Set default Max Payload Size to 256 bytes (Vidya Sagar) - Fix Data Link Feature capability programming (Vidya Sagar) - Extend Endpoint mode support to devices beyond Controller-5 (Vidya Sagar) Qualcomm PCIe controller driver: - Rework clock, reset, PHY power-on ordering to avoid hangs and improve consistency (Robert Marko, Christian Marangi) - Move pipe_clk handling to PHY drivers (Dmitry Baryshkov) - Add IPQ60xx support (Selvam Sathappan Periakaruppan) - Allow ASPM L1 and substates for 2.7.0 (Krishna chaitanya chundru) - Add support for more than 32 MSI interrupts (Dmitry Baryshkov) Renesas R-Car PCIe controller driver: - Convert DT binding to json-schema (Herve Codina) - Add Renesas RZ/N1D (R9A06G032) to rcar-gen2 DT binding and driver (Herve Codina) Samsung Exynos PCIe controller driver: - Fix phy-exynos-pcie driver so it follows the 'phy_init() before phy_power_on()' PHY programming model (Marek Szyprowski) Synopsys DesignWare PCIe controller driver: - Simplify and clean up the DWC core extensively (Serge Semin) - Fix an issue with programming the ATU for regions that cross a 4GB boundary (Serge Semin) - Enable the CDM check if 'snps,enable-cdm-check' exists; previously we skipped it if 'num-lanes' was absent (Serge Semin) - Allocate a 32-bit DMA-able page to be MSI target instead of using a driver data structure that may not be addressable with 32-bit address (Will McVicker) - Add DWC core support for more than 32 MSI interrupts (Dmitry Baryshkov) Xilinx Versal CPM PCIe controller driver: - Add DT binding and driver support for Versal CPM5 Gen5 Root Port (Bharat Kumar Gogada)" * tag 'pci-v5.20-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (150 commits) PCI: imx6: Support more than Gen2 speed link mode PCI: imx6: Set PCIE_DBI_RO_WR_EN before writing DBI registers PCI: imx6: Reformat suspend callback to keep symmetric with resume PCI: imx6: Move the imx6_pcie_ltssm_disable() earlier PCI: imx6: Disable clocks in reverse order of enable PCI: imx6: Do not hide PHY driver callbacks and refine the error handling PCI: imx6: Reduce resume time by only starting link if it was up before suspend PCI: imx6: Mark the link down as non-fatal error PCI: imx6: Move regulator enable out of imx6_pcie_deassert_core_reset() PCI: imx6: Turn off regulator when system is in suspend mode PCI: imx6: Call host init function directly in resume PCI: imx6: Disable i.MX6QDL clock when disabling ref clocks PCI: imx6: Propagate .host_init() errors to caller PCI: imx6: Collect clock enables in imx6_pcie_clk_enable() PCI: imx6: Factor out ref clock disable to match enable PCI: imx6: Move imx6_pcie_clk_disable() earlier PCI: imx6: Move imx6_pcie_enable_ref_clk() earlier PCI: imx6: Move PHY management functions together PCI: imx6: Move imx6_pcie_grp_offset(), imx6_pcie_configure_type() earlier PCI: imx6: Convert to NOIRQ_SYSTEM_SLEEP_PM_OPS() ...
2022-08-04Merge tag 'for-5.20-tag' of ↵Linus Torvalds2-4/+4
git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux Pull btrfs updates from David Sterba: "This brings some long awaited changes, the send protocol bump, otherwise lots of small improvements and fixes. The main core part is reworking bio handling, cleaning up the submission and endio and improving error handling. There are some changes outside of btrfs adding helpers or updating API, listed at the end of the changelog. Features: - sysfs: - export chunk size, in debug mode add tunable for setting its size - show zoned among features (was only in debug mode) - show commit stats (number, last/max/total duration) - send protocol updated to 2 - new commands: - ability write larger data chunks than 64K - send raw compressed extents (uses the encoded data ioctls), ie. no decompression on send side, no compression needed on receive side if supported - send 'otime' (inode creation time) among other timestamps - send file attributes (a.k.a file flags and xflags) - this is first version bump, backward compatibility on send and receive side is provided - there are still some known and wanted commands that will be implemented in the near future, another version bump will be needed, however we want to minimize that to avoid causing usability issues - print checksum type and implementation at mount time - don't print some messages at mount (mentioned as people asked about it), we want to print messages namely for new features so let's make some space for that - big metadata - this has been supported for a long time and is not a feature that's worth mentioning - skinny metadata - same reason, set by default by mkfs Performance improvements: - reduced amount of reserved metadata for delayed items - when inserted items can be batched into one leaf - when deleting batched directory index items - when deleting delayed items used for deletion - overall improved count of files/sec, decreased subvolume lock contention - metadata item access bounds checker micro-optimized, with a few percent of improved runtime for metadata-heavy operations - increase direct io limit for read to 256 sectors, improved throughput by 3x on sample workload Notable fixes: - raid56 - reduce parity writes, skip sectors of stripe when there are no data updates - restore reading from on-disk data instead of using stripe cache, this reduces chances to damage correct data due to RMW cycle - refuse to replay log with unknown incompat read-only feature bit set - zoned - fix page locking when COW fails in the middle of allocation - improved tracking of active zones, ZNS drives may limit the number and there are ENOSPC errors due to that limit and not actual lack of space - adjust maximum extent size for zone append so it does not cause late ENOSPC due to underreservation - mirror reading error messages show the mirror number - don't fallback to buffered IO for NOWAIT direct IO writes, we don't have the NOWAIT semantics for buffered io yet - send, fix sending link commands for existing file paths when there are deleted and created hardlinks for same files - repair all mirrors for profiles with more than 1 copy (raid1c34) - fix repair of compressed extents, unify where error detection and repair happen Core changes: - bio completion cleanups - don't double defer compression bios - simplify endio workqueues - add more data to btrfs_bio to avoid allocation for read requests - rework bio error handling so it's same what block layer does, the submission works and errors are consumed in endio - when asynchronous bio offload fails fall back to synchronous checksum calculation to avoid errors under writeback or memory pressure - new trace points - raid56 events - ordered extent operations - super block log_root_transid deprecated (never used) - mixed_backref and big_metadata sysfs feature files removed, they've been default for sufficiently long time, there are no known users and mixed_backref could be confused with mixed_groups Non-btrfs changes, API updates: - minor highmem API update to cover const arguments - switch all kmap/kmap_atomic to kmap_local - remove redundant flush_dcache_page() - address_space_operations::writepage callback removed - add bdev_max_segments() helper" * tag 'for-5.20-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: (163 commits) btrfs: don't call btrfs_page_set_checked in finish_compressed_bio_read btrfs: fix repair of compressed extents btrfs: remove the start argument to check_data_csum and export btrfs: pass a btrfs_bio to btrfs_repair_one_sector btrfs: simplify the pending I/O counting in struct compressed_bio btrfs: repair all known bad mirrors btrfs: merge btrfs_dev_stat_print_on_error with its only caller btrfs: join running log transaction when logging new name btrfs: simplify error handling in btrfs_lookup_dentry btrfs: send: always use the rbtree based inode ref management infrastructure btrfs: send: fix sending link commands for existing file paths btrfs: send: introduce recorded_ref_alloc and recorded_ref_free btrfs: zoned: wait until zone is finished when allocation didn't progress btrfs: zoned: write out partially allocated region btrfs: zoned: activate necessary block group btrfs: zoned: activate metadata block group on flush_space btrfs: zoned: disable metadata overcommit for zoned btrfs: zoned: introduce space_info->active_total_bytes btrfs: zoned: finish least available block group on data bg allocation btrfs: let can_allocate_chunk return error ...
2022-08-01Merge tag 'irq-core-2022-08-01' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq updates from Thomas Gleixner: "Updates for interrupt core and drivers: Core: - Fix a few inconsistencies between UP and SMP vs interrupt affinities - Small updates and cleanups all over the place New drivers: - LoongArch interrupt controller - Renesas RZ/G2L interrupt controller Updates: - Hotpath optimization for SiFive PLIC - Workaround for broken PLIC edge triggered interrupts - Simall cleanups and improvements as usual" * tag 'irq-core-2022-08-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (52 commits) irqchip/mmp: Declare init functions in common header file irqchip/mips-gic: Check the return value of ioremap() in gic_of_init() genirq: Use for_each_action_of_desc in actions_show() irqchip / ACPI: Introduce ACPI_IRQ_MODEL_LPIC for LoongArch irqchip: Add LoongArch CPU interrupt controller support irqchip: Add Loongson Extended I/O interrupt controller support irqchip/loongson-liointc: Add ACPI init support irqchip/loongson-pch-msi: Add ACPI init support irqchip/loongson-pch-pic: Add ACPI init support irqchip: Add Loongson PCH LPC controller support LoongArch: Prepare to support multiple pch-pic and pch-msi irqdomain LoongArch: Use ACPI_GENERIC_GSI for gsi handling genirq/generic_chip: Export irq_unmap_generic_chip ACPI: irq: Allow acpi_gsi_to_irq() to have an arch-specific fallback APCI: irq: Add support for multiple GSI domains LoongArch: Provisionally add ACPICA data structures irqdomain: Use hwirq_max instead of revmap_size for NOMAP domains irqdomain: Report irq number for NOMAP domains irqchip/gic-v3: Fix comment typo dt-bindings: interrupt-controller: renesas,rzg2l-irqc: Document RZ/V2L SoC ...
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-22 01:59:49 +0300