wireguard-linux/arch/xtensa/include, branch jd/orphan-parallel

xtensa: propagate the calling conventions change down into csum_partial_copy_generic()

2020-08-20T19:45:21Z

turn the exception handlers into returning 0. Signed-off-by: Al Viro

saner calling conventions for csum_and_copy_..._user()

2020-08-20T19:45:15Z

All callers of these primitives will * discard anything we might've copied in case of error * ignore the csum value in case of error * always pass 0xffffffff as the initial sum, so the resulting csum value (in case of success, that is) will never be 0. That suggest the following calling conventions: * don't pass err_ptr - just return 0 on error. * don't bother with zeroing destination, etc. in case of error * don't pass the initial sum - just use 0xffffffff. This commit does the minimal conversion in the instances of csum_and_copy_...(); the changes of actual asm code behind them are done later in the series. Note that this asm code is often shared with csum_partial_copy_nocheck(); the difference is that csum_partial_copy_nocheck() passes 0 for initial sum while csum_and_copy_..._user() pass 0xffffffff. Fortunately, we are free to pass 0xffffffff in all cases and subsequent patches will use that freedom without any special comments. A part that could be split off: parisc and uml/i386 claimed to have csum_and_copy_to_user() instances of their own, but those were identical to the generic one, so we simply drop them. Not sure if it's worth a separate commit... Signed-off-by: Al Viro

csum_partial_copy_nocheck(): drop the last argument

2020-08-20T19:45:14Z

It's always 0. Note that we theoretically could use ~0U as well - result will be the same modulo 0xffff, _if_ the damn thing did the right thing for any value of initial sum; later we'll make use of that when convenient. However, unlike csum_and_copy_..._user(), there are instances that did not work for arbitrary initial sums; c6x is one such. Signed-off-by: Al Viro

unify generic instances of csum_partial_copy_nocheck()

2020-08-20T19:45:14Z

quite a few architectures have the same csum_partial_copy_nocheck() - simply memcpy() the data and then return the csum of the copy. hexagon, parisc, ia64, s390, um: explicitly spelled out that way. arc, arm64, csky, h8300, m68k/nommu, microblaze, mips/GENERIC_CSUM, nds32, nios2, openrisc, riscv, unicore32: end up picking the same thing spelled out in lib/checksum.h (with varying amounts of perversions along the way). everybody else (alpha, arm, c6x, m68k/mmu, mips/!GENERIC_CSUM, powerpc, sh, sparc, x86, xtensa) have non-generic variants. For all except c6x the declaration is in their asm/checksum.h. c6x uses the wrapper from asm-generic/checksum.h that would normally lead to the lib/checksum.h instance, but in case of c6x we end up using an asm function from arch/c6x instead. Screw that mess - have architectures with private instances define _HAVE_ARCH_CSUM_AND_COPY in their asm/checksum.h and have the default one right in net/checksum.h conditional on _HAVE_ARCH_CSUM_AND_COPY *not* defined. Signed-off-by: Al Viro

uaccess: remove segment_eq

2020-08-12T17:57:58Z

segment_eq is only used to implement uaccess_kernel. Just open code uaccess_kernel in the arch uaccess headers and remove one layer of indirection. Signed-off-by: Christoph Hellwig Signed-off-by: Andrew Morton Acked-by: Linus Torvalds Acked-by: Greentime Hu Acked-by: Geert Uytterhoeven Cc: Nick Hu Cc: Vincent Chen Cc: Paul Walmsley Cc: Palmer Dabbelt Link: http://lkml.kernel.org/r/20200710135706.537715-5-hch@lst.de Signed-off-by: Linus Torvalds

asm-generic: pgalloc: provide generic pgd_free()

2020-08-07T18:33:26Z

Most architectures define pgd_free() as a wrapper for free_page(). Provide a generic version in asm-generic/pgalloc.h and enable its use for most architectures. Signed-off-by: Mike Rapoport Signed-off-by: Andrew Morton Reviewed-by: Pekka Enberg Acked-by: Geert Uytterhoeven [m68k] Cc: Abdul Haleem Cc: Andy Lutomirski Cc: Arnd Bergmann Cc: Christophe Leroy Cc: Joerg Roedel Cc: Joerg Roedel Cc: Max Filippov Cc: Peter Zijlstra (Intel) Cc: Satheesh Rajendran Cc: Stafford Horne Cc: Stephen Rothwell Cc: Steven Rostedt Cc: Matthew Wilcox Link: http://lkml.kernel.org/r/20200627143453.31835-7-rppt@kernel.org Signed-off-by: Linus Torvalds

xtensa: switch to generic version of pte allocation

2020-08-07T18:33:26Z

xtensa clears PTEs during allocation of the page tables and pte_clear() sets the PTE to a non-zero value. Splitting ptes_clear() helper out of pte_alloc_one() and pte_alloc_one_kernel() allows reuse of base generic allocation methods (__pte_alloc_one() and __pte_alloc_one_kernel()) and the common GFP mask for page table allocations. The pte_free() and pte_free_kernel() implementations on xtensa are identical to the generic ones and can be dropped. [jcmvbkbc@gmail.com: xtensa: fix closing endif comment] Link: http://lkml.kernel.org/r/20200721024751.1257-1-jcmvbkbc@gmail.com Signed-off-by: Mike Rapoport Signed-off-by: Max Filippov Signed-off-by: Andrew Morton Reviewed-by: Pekka Enberg Cc: Abdul Haleem Cc: Andy Lutomirski Cc: Arnd Bergmann Cc: Christophe Leroy Cc: Joerg Roedel Cc: Joerg Roedel Cc: Max Filippov Cc: Peter Zijlstra (Intel) Cc: Satheesh Rajendran Cc: Stafford Horne Cc: Stephen Rothwell Cc: Steven Rostedt Cc: Geert Uytterhoeven Cc: Matthew Wilcox Link: http://lkml.kernel.org/r/20200627143453.31835-4-rppt@kernel.org Signed-off-by: Linus Torvalds

Merge tag 'xtensa-20200805' of git://github.com/jcmvbkbc/linux-xtensa

2020-08-06T17:07:40Z

Pull Xtensa updates from Max Filippov: - add syscall audit support - add seccomp filter support - clean up make rules under arch/xtensa/boot - fix state management for exclusive access opcodes - fix build with PMU enabled * tag 'xtensa-20200805' of git://github.com/jcmvbkbc/linux-xtensa: xtensa: add missing exclusive access state management xtensa: fix xtensa_pmu_setup prototype xtensa: add boot subdirectories build artifacts to 'targets' xtensa: add uImage and xipImage to targets xtensa: move vmlinux.bin[.gz] to boot subdirectory xtensa: initialize_mmu.h: fix a duplicated word selftests/seccomp: add xtensa support xtensa: add seccomp support xtensa: expose syscall through user_pt_regs xtensa: add audit support

xtensa: add missing exclusive access state management

2020-07-31T21:15:57Z

The result of the s32ex opcode is recorded in the ATOMCTL special register and must be retrieved with the getex opcode. Context switch between s32ex and getex may trash the ATOMCTL register and result in duplicate update or missing update of the atomic variable. Add atomctl8 field to the struct thread_info and use getex to swap ATOMCTL bit 8 as a part of context switch. Clear exclusive access monitor on kernel entry. Cc: stable@vger.kernel.org Fixes: f7c34874f04a ("xtensa: add exclusive atomics support") Signed-off-by: Max Filippov

Merge branch 'linus' into locking/core, to resolve conflict

2020-07-31T10:16:09Z

Conflicts: arch/arm/include/asm/percpu.h As Stephen Rothwell noted, there's a conflict between this commit in locking/core: a21ee6055c30 ("lockdep: Change hardirq{s_enabled,_context} to per-cpu variables") and this fresh upstream commit: aa54ea903abb ("ARM: percpu.h: fix build error") a21ee6055c30 is a simpler solution to the dependency problem and doesn't further increase header hell - so this conflict resolution effectively reverts aa54ea903abb and uses the a21ee6055c30 solution. Signed-off-by: Ingo Molnar