kernel/linux.git/arch/arc/mm, branch v6.6.131

Merge tag 'arc-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc

2023-09-04T22:38:24+00:00

Pull ARC updates from Vineet Gupta: - fixes for -Wmissing-prototype warnings - missing compiler barrier in relaxed atomics - some uaccess simplification, declutter - removal of massive glocal struct cpuinfo_arc from bootlog code - __switch_to consolidation (removal of inline asm variant) - use GP to cache task pointer (vs. r25) - misc rework of entry code * tag 'arc-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: (24 commits) ARC: boot log: fix warning arc: Explicitly include correct DT includes ARC: pt_regs: create seperate type for ecr ARCv2: entry: rearrange pt_regs slightly ARC: entry: replace 8 byte ADD.ne with 4 byte ADD2.ne ARC: entry: replace 8 byte OR with 4 byte BSET ARC: entry: Add more common chores to EXCEPTION_PROLOGUE ARC: entry: EV_MachineCheck dont re-read ECR ARC: entry: ARcompact EV_ProtV to use r10 directly ARC: entry: rework (non-functional) ARC: __switch_to: move ksp to thread_info from thread_struct ARC: __switch_to: asm with dwarf ops (vs. inline asm) ARC: kernel stack: INIT_THREAD need not setup @init_stack in @ksp ARC: entry: use gp to cache task pointer (vs. r25) ARC: boot log: eliminate struct cpuinfo_arc #4: boot log per ISA ARC: boot log: eliminate struct cpuinfo_arc #3: don't export ARC: boot log: eliminate struct cpuinfo_arc #2: cache ARC: boot log: eliminate struct cpuinfo_arc #1: mm ARCv2: memset: don't prefetch for len == 0 which happens a alot ARC: uaccess: elide unaliged handling if hardware supports ...

arc: implement the new page table range API

2023-08-24T23:20:20+00:00

Add PFN_PTE_SHIFT, update_mmu_cache_range(), flush_dcache_folio() and flush_icache_pages(). Change the PG_dc_clean flag from being per-page to per-folio (which means it cannot always be set as we don't know that all pages in this folio were cleaned). Enhance the internal flush routines to take the number of pages to flush. Link: https://lkml.kernel.org/r/20230802151406.3735276-9-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Acked-by: Mike Rapoport (IBM) Cc: Vineet Gupta Signed-off-by: Andrew Morton

ARC: pt_regs: create seperate type for ecr

2023-08-18T17:30:47+00:00

Reduces duplication in each ISA specific pt_regs Tested-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202308151342.ROQ9Urvv-lkp@intel.com Signed-off-by: Vineet Gupta

arc: mm: convert to GENERIC_IOREMAP

2023-08-18T17:12:33+00:00

By taking GENERIC_IOREMAP method, the generic generic_ioremap_prot(), generic_iounmap(), and their generic wrapper ioremap_prot(), ioremap() and iounmap() are all visible and available to arch. Arch needs to provide wrapper functions to override the generic versions if there's arch specific handling in its ioremap_prot(), ioremap() or iounmap(). This change will simplify implementation by removing duplicated code with generic_ioremap_prot() and generic_iounmap(), and has the equivalent functioality as before. Here, add wrapper functions ioremap_prot() and iounmap() for arc's special operation when ioremap_prot() and iounmap(). Link: https://lkml.kernel.org/r/20230706154520.11257-8-bhe@redhat.com Signed-off-by: Baoquan He Reviewed-by: Christoph Hellwig Reviewed-by: Mike Rapoport (IBM) Cc: Vineet Gupta Cc: Alexander Gordeev Cc: Arnd Bergmann Cc: Brian Cain Cc: Catalin Marinas Cc: Christian Borntraeger Cc: Christophe Leroy Cc: Chris Zankel Cc: David Laight Cc: Geert Uytterhoeven Cc: Gerald Schaefer Cc: Heiko Carstens Cc: Helge Deller Cc: "James E.J. Bottomley" Cc: John Paul Adrian Glaubitz Cc: Jonas Bonn Cc: Kefeng Wang Cc: Matthew Wilcox Cc: Max Filippov Cc: Michael Ellerman Cc: Nathan Chancellor Cc: Nicholas Piggin Cc: Niklas Schnelle Cc: Rich Felker Cc: Stafford Horne Cc: Stefan Kristiansson Cc: Sven Schnelle Cc: Vasily Gorbik Cc: Will Deacon Cc: Yoshinori Sato Signed-off-by: Andrew Morton

ARC: boot log: eliminate struct cpuinfo_arc #4: boot log per ISA

2023-08-18T03:31:59+00:00

- boot log now clearly per ISA - global struct cpuinfo_arc[] elimiated - local struct struct arcinfo kept for passing info between functions Tested-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202308162101.Ve5jBg80-lkp@intel.com Signed-off-by: Vineet Gupta

ARC: boot log: eliminate struct cpuinfo_arc #2: cache

2023-08-18T03:31:59+00:00

Signed-off-by: Vineet Gupta

ARC: boot log: eliminate struct cpuinfo_arc #1: mm

2023-08-18T03:31:57+00:00

This is first step in eliminating struct cpuinfo_arc[NR_CPUS] Back when we had just ARCompact ISA, the idea was to read/bit-fiddle the BCRs once and and cache decoded information in a global struct ready to use. With ARCv2 it was modified to contained abstract / ISA agnostic information. However with ARCv3 there 's too much disparity to abstract in common structures. So drop the entire decode once and store paradigm. Afterall there's only 2 users of this machinery anyways: boot printing and cat /proc/cpuinfo. None is performance critical to warrant locking away resident memory per cpu. This patch is first step in that direction - decouples struct cpuinfo_arc_mmu from global struct cpuinfo_arc - mmu code still has a trimmed down static version of struct cpuinfo_arc_mmu to cache information needed in performance critical code such as tlb flush routines - folds read_decode_mmu_bcr() into arc_mmu_mumbojumbo() - setup_processor() directly calls arc_mmu_init() and not via arc_cpu_init() Tested-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202308151213.qKZPMiyz-lkp@intel.com/ Signed-off-by: Vineet Gupta

ARC: uaccess: remove arc specific out-of-line handles for -Os

2023-08-17T19:40:26+00:00

Everything is now out-of-line in lib/usercopy.c Signed-off-by: Vineet Gupta

ARC: -Wmissing-prototype warning fixes

2023-08-13T23:53:02+00:00

Anrd reported [1] new compiler warnings due to -Wmissing-protype. These are for non static functions mostly used in asm code hence not exported already. Fix this by adding the prototypes. [1] https://lore.kernel.org/lkml/20230810141947.1236730-1-arnd@kernel.org Reviewed-by: Arnd Bergmann Signed-off-by: Vineet Gupta

Merge tag 'asm-generic-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

2023-07-06T17:06:04+00:00

Pull asm-generic updates from Arnd Bergmann: "These are cleanups for architecture specific header files: - the comments in include/linux/syscalls.h have gone out of sync and are really pointless, so these get removed - The asm/bitsperlong.h header no longer needs to be architecture specific on modern compilers, so use a generic version for newer architectures that use new enough userspace compilers - A cleanup for virt_to_pfn/virt_to_bus to have proper type checking, forcing the use of pointers" * tag 'asm-generic-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: syscalls: Remove file path comments from headers tools arch: Remove uapi bitsperlong.h of hexagon and microblaze asm-generic: Unify uapi bitsperlong.h for arm64, riscv and loongarch m68k/mm: Make pfn accessors static inlines arm64: memory: Make virt_to_pfn() a static inline ARM: mm: Make virt_to_pfn() a static inline asm-generic/page.h: Make pfn accessors static inlines xen/netback: Pass (void *) to virt_to_page() netfs: Pass a pointer to virt_to_page() cifs: Pass a pointer to virt_to_page() in cifsglob cifs: Pass a pointer to virt_to_page() riscv: mm: init: Pass a pointer to virt_to_page() ARC: init: Pass a pointer to virt_to_pfn() in init m68k: Pass a pointer to virt_to_pfn() virt_to_page() fs/proc/kcore.c: Pass a pointer to virt_addr_valid()