kernel.git/arch/xtensa/Kconfig, branch linux-5.18.y

Merge tag 'dma-mapping-5.18' of git://git.infradead.org/users/hch/dma-mapping

2022-03-29T15:50:14Z

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()

Merge tag 'xtensa-20220325' of https://github.com/jcmvbkbc/linux-xtensa

2022-03-25T16:49:39Z

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

Merge tag 'asm-generic-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

2022-03-24T01:03:08Z

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 ...

xtensa: enable plugin support

2022-03-19T20:08:50Z

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

xtensa: make secondary reset vector support conditional

2022-03-10T00:59:18Z

Whether xtensa cores start from primary or secondary reset vector is configurable and may be chosen by board designer or controlled at runtime. When secondary reset vector is unused its location in memory may not be writable. Make secondary reset vector support conditional and don't build and load secondary reset vector code when it is disabled. Signed-off-by: Max Filippov

xtensa: add kernel ABI selection to Kconfig

2022-03-09T22:16:35Z

Add choice to use default or call0 ABI for the kernel code. If call0 ABI is chosen add '-mabi=call0' to the flags. The toolchain support for this option is rather new so only enable it when the compiler supports it. Signed-off-by: Max Filippov

xtensa: don't link with libgcc

2022-03-09T22:03:23Z

libgcc may be absent or may have different ABI than the kernel. Don't link with it. Drop declarations and export for helpers that are not implemented. Use generic versions of DI mode multiplication and comparisons. Drop register window spilling helper as it should never be used by the compiler-generated code. Signed-off-by: Max Filippov

dma-mapping: remove CONFIG_DMA_REMAP

2022-03-03T11:00:57Z

CONFIG_DMA_REMAP is used to build a few helpers around the core vmalloc code, and to use them in case there is a highmem page in dma-direct, and to make dma coherent allocations be able to use non-contiguous pages allocations for DMA allocations in the dma-iommu layer. Right now it needs to be explicitly selected by architectures, and is only done so by architectures that require remapping to deal with devices that are not DMA coherent. Make it unconditional for builds with CONFIG_MMU as it is very little extra code, but makes it much more likely that large DMA allocations succeed on x86. This fixes hot plugging a NVMe thunderbolt SSD for me, which tries to allocate a 1MB buffer that is otherwise hard to obtain due to memory fragmentation on a heavily used laptop. Signed-off-by: Christoph Hellwig Reviewed-by: Robin Murphy

xtensa: Implement "current_stack_pointer"

2022-02-26T02:21:23Z

To follow the existing per-arch conventions replace open-coded uses of asm "sp" as "current_stack_pointer". This will let it be used in non-arch places (like HARDENED_USERCOPY). Cc: Chris Zankel Cc: Marc Zyngier Cc: linux-xtensa@linux-xtensa.org Signed-off-by: Kees Cook Acked-by: Max Filippov Link: https://lore.kernel.org/lkml/CAMo8BfJFJE-n3=AF+pb9_6oF3gzxX7a+7aBrASHjjNX5byqDqw@mail.gmail.com

uaccess: remove CONFIG_SET_FS

2022-02-25T08:36:06Z

There are no remaining callers of set_fs(), so CONFIG_SET_FS can be removed globally, along with the thread_info field and any references to it. This turns access_ok() into a cheaper check against TASK_SIZE_MAX. As CONFIG_SET_FS is now gone, drop all remaining references to set_fs()/get_fs(), mm_segment_t, user_addr_max() and uaccess_kernel(). Acked-by: Sam Ravnborg # for sparc32 changes Acked-by: "Eric W. Biederman" Tested-by: Sergey Matyukevich # for arc changes Acked-by: Stafford Horne # [openrisc, asm-generic] Acked-by: Dinh Nguyen Signed-off-by: Arnd Bergmann