Linux kernel development work - see feature branches https://git.zx2c4.com/linux-dev/atom/arch/xtensa/Kconfig?h=linus%2Fmaster 2022-05-02T02:51:57Z 2022-05-02T02:51:57Z Max Filippov jcmvbkbc@gmail.com 2022-04-25T17:59:04Z urn:sha1:af7a16e567aec884276c2523eadf22dda547f949 xtensa kernels successfully build and run with CONFIG_DEBUG_VM_PGTABLE=y, enable arch support for it. Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> 2022-05-02T02:51:24Z Max Filippov jcmvbkbc@gmail.com 2022-04-20T13:07:20Z urn:sha1:733f5c28e59ef23fef9e0b64d79df24c2a4eed2b Define ARCH_HIBERNATION_POSSIBLE in Kconfig and implement hibernation callbacks. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> 2022-05-02T02:51:22Z Max Filippov jcmvbkbc@gmail.com 2019-10-05T06:33:31Z urn:sha1:725aea873261e8d986e527838fde2a721f0962d8 Prefix arch-specific barrier macros with '__' to make use of instrumented generic macros. Prefix arch-specific bitops with 'arch_' to make use of instrumented generic functions. Provide stubs for 64-bit atomics when building with KCSAN. Disable KCSAN instrumentation in arch/xtensa/boot. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Acked-by: Marco Elver <elver@google.com> 2022-05-02T02:51:22Z Max Filippov jcmvbkbc@gmail.com 2022-04-14T03:40:10Z urn:sha1:507185695e93c70aced2f419892bc2ab9387b324 There's no direct cputime_t manipulation in the xtensa arch code, so generic virt CPU accounting may be enabled. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> 2022-05-02T02:51:21Z Max Filippov jcmvbkbc@gmail.com 2022-04-14T03:41:12Z urn:sha1:55427d5b0dff5754f3579dde93955aac483e8d6a Put user exit context tracking call on the common kernel entry/exit path (function calls are impossible at earlier kernel entry stages because PS.EXCM is not cleared yet). Put user entry context tracking call on the user exit path. Syscalls go through this common code too, so nothing specific needs to be done for them. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> 2022-05-02T02:51:21Z Max Filippov jcmvbkbc@gmail.com 2019-12-10T22:23:49Z urn:sha1:a8f0c31fa87dcf9154c4209960f1dd1ed6a1aad8 Many xtensa CPU cores without full MMU still have memory protection features capable of raising exceptions for invalid instruction fetches/data access. Allow handling such exceptions. This improves behavior of processes that pass invalid memory pointers to syscalls in noMMU configs: in case of exception the kernel instead of killing the process is now able to return -EINVAL from a syscall. Introduce CONFIG_PFAULT that controls whether protection fault code is enabled and register handlers for common memory protection exceptions when it is enabled. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> 2022-03-29T15:50:14Z Linus Torvalds torvalds@linux-foundation.org 2022-03-29T15:50:14Z urn:sha1:9ae2a143081fa8fba5042431007b33d9a855b7a2 Pull dma-mapping updates from Christoph Hellwig: - do not zero buffer in set_memory_decrypted (Kirill A. Shutemov) - fix return value of dma-debug __setup handlers (Randy Dunlap) - swiotlb cleanups (Robin Murphy) - remove most remaining users of the pci-dma-compat.h API (Christophe JAILLET) - share the ABI header for the DMA map_benchmark with userspace (Tian Tao) - update the maintainer for DMA MAPPING BENCHMARK (Xiang Chen) - remove CONFIG_DMA_REMAP (me) * tag 'dma-mapping-5.18' of git://git.infradead.org/users/hch/dma-mapping: dma-mapping: benchmark: extract a common header file for map_benchmark definition dma-debug: fix return value of __setup handlers dma-mapping: remove CONFIG_DMA_REMAP media: v4l2-pci-skeleton: Remove usage of the deprecated "pci-dma-compat.h" API rapidio/tsi721: Remove usage of the deprecated "pci-dma-compat.h" API sparc: Remove usage of the deprecated "pci-dma-compat.h" API agp/intel: Remove usage of the deprecated "pci-dma-compat.h" API alpha: Remove usage of the deprecated "pci-dma-compat.h" API MAINTAINERS: update maintainer list of DMA MAPPING BENCHMARK swiotlb: simplify array allocation swiotlb: tidy up includes swiotlb: simplify debugfs setup swiotlb: do not zero buffer in set_memory_decrypted() 2022-03-25T16:49:39Z Linus Torvalds torvalds@linux-foundation.org 2022-03-25T16:49:39Z urn:sha1:744465da705f7d8cd893e97738a47b91f3321ce2 Pull Xtensa updates from Max Filippov: - remove dependency on the compiler's libgcc - allow selection of internal kernel ABI via Kconfig - enable compiler plugins support for gcc-12 or newer - various minor cleanups and fixes * tag 'xtensa-20220325' of https://github.com/jcmvbkbc/linux-xtensa: xtensa: define update_mmu_tlb function xtensa: fix xtensa_wsr always writing 0 xtensa: enable plugin support xtensa: clean up kernel exit assembly code xtensa: rearrange NMI exit path xtensa: merge stack alignment definitions xtensa: fix DTC warning unit_address_format xtensa: fix stop_machine_cpuslocked call in patch_text xtensa: make secondary reset vector support conditional xtensa: add kernel ABI selection to Kconfig xtensa: don't link with libgcc xtensa: add helpers for division, remainder and shifts xtensa: add missing XCHAL_HAVE_WINDOWED check xtensa: use XCHAL_NUM_AREGS as pt_regs::areg size xtensa: rename PT_SIZE to PT_KERNEL_SIZE xtensa: Remove unused early_read_config_byte() et al declarations xtensa: use strscpy to copy strings net: xtensa: use strscpy to copy strings 2022-03-24T01:03:08Z Linus Torvalds torvalds@linux-foundation.org 2022-03-24T01:03:08Z urn:sha1:194dfe88d62ed12d0cf30f6f20734c2d0d111533 Pull asm-generic updates from Arnd Bergmann: "There are three sets of updates for 5.18 in the asm-generic tree: - The set_fs()/get_fs() infrastructure gets removed for good. This was already gone from all major architectures, but now we can finally remove it everywhere, which loses some particularly tricky and error-prone code. There is a small merge conflict against a parisc cleanup, the solution is to use their new version. - The nds32 architecture ends its tenure in the Linux kernel. The hardware is still used and the code is in reasonable shape, but the mainline port is not actively maintained any more, as all remaining users are thought to run vendor kernels that would never be updated to a future release. - A series from Masahiro Yamada cleans up some of the uapi header files to pass the compile-time checks" * tag 'asm-generic-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (27 commits) nds32: Remove the architecture uaccess: remove CONFIG_SET_FS ia64: remove CONFIG_SET_FS support sh: remove CONFIG_SET_FS support sparc64: remove CONFIG_SET_FS support lib/test_lockup: fix kernel pointer check for separate address spaces uaccess: generalize access_ok() uaccess: fix type mismatch warnings from access_ok() arm64: simplify access_ok() m68k: fix access_ok for coldfire MIPS: use simpler access_ok() MIPS: Handle address errors for accesses above CPU max virtual user address uaccess: add generic __{get,put}_kernel_nofault nios2: drop access_ok() check from __put_user() x86: use more conventional access_ok() definition x86: remove __range_not_ok() sparc64: add __{get,put}_kernel_nofault() nds32: fix access_ok() checks in get/put_user uaccess: fix nios2 and microblaze get_user_8() sparc64: fix building assembly files ... 2022-03-19T20:08:50Z Max Filippov jcmvbkbc@gmail.com 2022-03-19T12:49:24Z urn:sha1:7dc0eb0b6d9f3e2b6a560a04f86ef065a4531a9f Compiler plugins can be built starting with xtensa gcc 12. Enable plugin support for xtensa when gcc-12 or newer is used. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>