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2020-06-03Merge tag 'mips_5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linuxLinus Torvalds
Pull MIPS updates from Thomas Bogendoerfer: - added support for MIPSr5 and P5600 cores - converted Loongson PCI driver into a PCI host driver using the generic PCI framework - added emulation of CPUCFG command for Loogonson64 cpus - removed of LASAT, PMC MSP71xx and NEC MARKEINS/EMMA - ioremap cleanup - fix for a race between two threads faulting the same page - various cleanups and fixes * tag 'mips_5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (143 commits) MIPS: ralink: drop ralink_clk_init for mt7621 MIPS: ralink: bootrom: mark a function as __init to save some memory MIPS: Loongson64: Reorder CPUCFG model match arms MIPS: Expose Loongson CPUCFG availability via HWCAP MIPS: Loongson64: Guard against future cores without CPUCFG MIPS: Fix build warning about "PTR_STR" redefinition MIPS: Loongson64: Remove not used pci.c MIPS: Loongson64: Define PCI_IOBASE MIPS: CPU_LOONGSON2EF need software to maintain cache consistency MIPS: DTS: Fix build errors used with various configs MIPS: Loongson64: select NO_EXCEPT_FILL MIPS: Fix IRQ tracing when call handle_fpe() and handle_msa_fpe() MIPS: mm: add page valid judgement in function pte_modify mm/memory.c: Add memory read privilege on page fault handling mm/memory.c: Update local TLB if PTE entry exists MIPS: Do not flush tlb page when updating PTE entry MIPS: ingenic: Default to a generic board MIPS: ingenic: Add support for GCW Zero prototype MIPS: ingenic: DTS: Add memory info of GCW Zero MIPS: Loongson64: Switch to generic PCI driver ...
2020-06-02Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge updates from Andrew Morton: "A few little subsystems and a start of a lot of MM patches. Subsystems affected by this patch series: squashfs, ocfs2, parisc, vfs. With mm subsystems: slab-generic, slub, debug, pagecache, gup, swap, memcg, pagemap, memory-failure, vmalloc, kasan" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (128 commits) kasan: move kasan_report() into report.c mm/mm_init.c: report kasan-tag information stored in page->flags ubsan: entirely disable alignment checks under UBSAN_TRAP kasan: fix clang compilation warning due to stack protector x86/mm: remove vmalloc faulting mm: remove vmalloc_sync_(un)mappings() x86/mm/32: implement arch_sync_kernel_mappings() x86/mm/64: implement arch_sync_kernel_mappings() mm/ioremap: track which page-table levels were modified mm/vmalloc: track which page-table levels were modified mm: add functions to track page directory modifications s390: use __vmalloc_node in stack_alloc powerpc: use __vmalloc_node in alloc_vm_stack arm64: use __vmalloc_node in arch_alloc_vmap_stack mm: remove vmalloc_user_node_flags mm: switch the test_vmalloc module to use __vmalloc_node mm: remove __vmalloc_node_flags_caller mm: remove both instances of __vmalloc_node_flags mm: remove the prot argument to __vmalloc_node mm: remove the pgprot argument to __vmalloc ...
2020-06-02mm: add functions to track page directory modificationsJoerg Roedel
Patch series "mm: Get rid of vmalloc_sync_(un)mappings()", v3. After the recent issue with vmalloc and tracing code[1] on x86 and a long history of previous issues related to the vmalloc_sync_mappings() interface, I thought the time has come to remove it. Please see [2], [3], and [4] for some other issues in the past. The patches add tracking of page-table directory changes to the vmalloc and ioremap code. Depending on which page-table levels changes have been made, a new per-arch function is called: arch_sync_kernel_mappings(). On x86-64 with 4-level paging, this function will not be called more than 64 times in a systems runtime (because vmalloc-space takes 64 PGD entries which are only populated, but never cleared). As a side effect this also allows to get rid of vmalloc faults on x86, making it safe to touch vmalloc'ed memory in the page-fault handler. Note that this potentially includes per-cpu memory. This patch (of 7): Add page-table allocation functions which will keep track of changed directory entries. They are needed for new PGD, P4D, PUD, and PMD entries and will be used in vmalloc and ioremap code to decide whether any changes in the kernel mappings need to be synchronized between page-tables in the system. Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Andy Lutomirski <luto@kernel.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: "H . Peter Anvin" <hpa@zytor.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Michal Hocko <mhocko@kernel.org> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Christoph Hellwig <hch@lst.de> Link: http://lkml.kernel.org/r/20200515140023.25469-1-joro@8bytes.org Link: http://lkml.kernel.org/r/20200515140023.25469-2-joro@8bytes.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-02mm: enforce that vmap can't map pages executableChristoph Hellwig
To help enforcing the W^X protection don't allow remapping existing pages as executable. x86 bits from Peter Zijlstra, arm64 bits from Mark Rutland. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Mark Rutland <mark.rutland@arm.com>. Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: David Airlie <airlied@linux.ie> Cc: Gao Xiang <xiang@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Laura Abbott <labbott@redhat.com> Cc: Michael Kelley <mikelley@microsoft.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Nitin Gupta <ngupta@vflare.org> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Sakari Ailus <sakari.ailus@linux.intel.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Wei Liu <wei.liu@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Will Deacon <will@kernel.org> Link: http://lkml.kernel.org/r/20200414131348.444715-20-hch@lst.de Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-01Merge branch 'uaccess.csum' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull uaccess/csum updates from Al Viro: "Regularize the sitation with uaccess checksum primitives: - fold csum_partial_... into csum_and_copy_..._user() - on x86 collapse several access_ok()/stac()/clac() into user_access_begin()/user_access_end()" * 'uaccess.csum' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: default csum_and_copy_to_user(): don't bother with access_ok() take the dummy csum_and_copy_from_user() into net/checksum.h arm: switch to csum_and_copy_from_user() sh32: convert to csum_and_copy_from_user() m68k: convert to csum_and_copy_from_user() xtensa: switch to providing csum_and_copy_from_user() sparc: switch to providing csum_and_copy_from_user() parisc: turn csum_partial_copy_from_user() into csum_and_copy_from_user() alpha: turn csum_partial_copy_from_user() into csum_and_copy_from_user() ia64: turn csum_partial_copy_from_user() into csum_and_copy_from_user() ia64: csum_partial_copy_nocheck(): don't abuse csum_partial_copy_from_user() x86: switch 32bit csum_and_copy_to_user() to user_access_{begin,end}() x86: switch both 32bit and 64bit to providing csum_and_copy_from_user() x86_64: csum_..._copy_..._user(): switch to unsafe_..._user() get rid of csum_partial_copy_to_user()
2020-06-01Merge tag 'core-kprobes-2020-06-01' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull kprobes updates from Ingo Molnar: "Various kprobes updates, mostly centered around cleaning up the no-instrumentation logic. Instead of the current per debug facility blacklist, use the more generic .noinstr.text approach, combined with a 'noinstr' marker for functions. Also add instrumentation_begin()/end() to better manage the exact place in entry code where instrumentation may be used. And add a kprobes blacklist for modules" * tag 'core-kprobes-2020-06-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: kprobes: Prevent probes in .noinstr.text section vmlinux.lds.h: Create section for protection against instrumentation samples/kprobes: Add __kprobes and NOKPROBE_SYMBOL() for handlers. kprobes: Support NOKPROBE_SYMBOL() in modules kprobes: Support __kprobes blacklist in modules kprobes: Lock kprobe_mutex while showing kprobe_blacklist
2020-05-29take the dummy csum_and_copy_from_user() into net/checksum.hAl Viro
now that can be done conveniently - all non-trivial cases have _HAVE_ARCH_COPY_AND_CSUM_FROM_USER defined, so the fallback in net/checksum.h is used only for dummy (copy_from_user, then csum_partial) implementation. Allowing us to get rid of all dummy instances, both of csum_and_copy_from_user() and csum_partial_copy_from_user(). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-05-28include/asm-generic/topology.h: guard cpumask_of_node() macro argumentArnd Bergmann
drivers/hwmon/amd_energy.c:195:15: error: invalid operands to binary expression ('void' and 'int') (channel - data->nr_cpus)); ~~~~~~~~~^~~~~~~~~~~~~~~~~ include/asm-generic/topology.h:51:42: note: expanded from macro 'cpumask_of_node' #define cpumask_of_node(node) ((void)node, cpu_online_mask) ^~~~ include/linux/cpumask.h:618:72: note: expanded from macro 'cpumask_first_and' #define cpumask_first_and(src1p, src2p) cpumask_next_and(-1, (src1p), (src2p)) ^~~~~ Fixes: f0b848ce6fe9 ("cpumask: Introduce cpumask_of_{node,pcibus} to replace {node,pcibus}_to_cpumask") Fixes: 8abee9566b7e ("hwmon: Add amd_energy driver to report energy counters") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Guenter Roeck <linux@roeck-us.net> Link: http://lkml.kernel.org/r/20200527134623.930247-1-arnd@arndb.de Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-05-27mm/memory.c: Add memory read privilege on page fault handlingBibo Mao
Here add pte_sw_mkyoung function to make page readable on MIPS platform during page fault handling. This patch improves page fault latency about 10% on my MIPS machine with lmbench lat_pagefault case. It is noop function on other arches, there is no negative influence on those architectures. Signed-off-by: Bibo Mao <maobibo@loongson.cn> Acked-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-05-27mm/memory.c: Update local TLB if PTE entry existsBibo Mao
If two threads concurrently fault at the same page, the thread that won the race updates the PTE and its local TLB. For now, the other thread gives up, simply does nothing, and continues. It could happen that this second thread triggers another fault, whereby it only updates its local TLB while handling the fault. Instead of triggering another fault, let's directly update the local TLB of the second thread. Function update_mmu_tlb is used here to update local TLB on the second thread, and it is defined as empty on other arches. Signed-off-by: Bibo Mao <maobibo@loongson.cn> Acked-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-05-26Merge tag 'hisi-drivers-for-5.8' of git://github.com/hisilicon/linux-hisi ↵Arnd Bergmann
into arm/drivers ARM64: hisi: SoC driver updates for 5.8 - Generate consistent behaviour for logic_pio by defining and using generic _inX() and _outX() in asm-generic/io.h which have per-arch overrideable barriers. * tag 'hisi-drivers-for-5.8' of git://github.com/hisilicon/linux-hisi: logic_pio: Use _inX() and _outX() logic_pio: Improve macro argument name io: Provide _inX() and _outX()
2020-05-20asm-generic/hyperv: Add definitions for Get/SetVpRegister hypercallsMichael Kelley
Add definitions for GetVpRegister and SetVpRegister hypercalls, which are implemented for both x86 and ARM64. Signed-off-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/20200422195737.10223-5-mikelley@microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
2020-05-20x86/hyperv: Split hyperv-tlfs.h into arch dependent and independent filesMichael Kelley
In preparation for adding ARM64 support, split hyperv-tlfs.h into architecture dependent and architecture independent files, similar to what has been done with mshyperv.h. Move architecture independent definitions into include/asm-generic/hyperv-tlfs.h. The split will avoid duplicating significant lines of code in the ARM64 version of hyperv-tlfs.h. The split has no functional impact. Some of the common definitions have "X64" in the symbol name. Change these to remove the "X64" in the architecture independent version of hyperv-tlfs.h, but add aliases with the "X64" in the x86 version so that x86 code will continue to compile. A later patch set will change all the references and allow removal of the aliases. Signed-off-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/20200422195737.10223-4-mikelley@microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
2020-05-19vmlinux.lds.h: Create section for protection against instrumentationThomas Gleixner
Some code pathes, especially the low level entry code, must be protected against instrumentation for various reasons: - Low level entry code can be a fragile beast, especially on x86. - With NO_HZ_FULL RCU state needs to be established before using it. Having a dedicated section for such code allows to validate with tooling that no unsafe functions are invoked. Add the .noinstr.text section and the noinstr attribute to mark functions. noinstr implies notrace. Kprobes will gain a section check later. Provide also a set of markers: instrumentation_begin()/end() These are used to mark code inside a noinstr function which calls into regular instrumentable text section as safe. The instrumentation markers are only active when CONFIG_DEBUG_ENTRY is enabled as the end marker emits a NOP to prevent the compiler from merging the annotation points. This means the objtool verification requires a kernel compiled with this option. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Link: https://lkml.kernel.org/r/20200505134100.075416272@linutronix.de
2020-05-07io: Provide _inX() and _outX()John Garry
Since commit a7851aa54c0c ("io: change outX() to have their own IO barrier overrides") and commit 87fe2d543f81 ("io: change inX() to have their own IO barrier overrides"), the outX and inX functions have memory barriers which can be overridden. However, the generic logic_pio lib has continued to use readl/writel et al for IO port accesses, which has weaker barriers on arm64. Provide generic _inX() and _outX(), which can be used by logic pio. For consistency, we check for !defined({in,out}X) && !defined(_{in,out}X), for defining _{in,out}X, while a check for just !defined({in,out}X) should suffice. Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Wei Xu <xuwei5@hisilicon.com>
2020-05-05mm: change pmdp_huge_get_and_clear_full take vm_area_struct as argAneesh Kumar K.V
We will use this in later patch to do tlb flush when clearing pmd entries. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200505071729.54912-22-aneesh.kumar@linux.ibm.com
2020-04-23arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h>Masahiro Yamada
As the bug report [1] pointed out, <linux/vermagic.h> must be included after <linux/module.h>. I believe we should not impose any include order restriction. We often sort include directives alphabetically, but it is just coding style convention. Technically, we can include header files in any order by making every header self-contained. Currently, arch-specific MODULE_ARCH_VERMAGIC is defined in <asm/module.h>, which is not included from <linux/vermagic.h>. Hence, the straight-forward fix-up would be as follows: |--- a/include/linux/vermagic.h |+++ b/include/linux/vermagic.h |@@ -1,5 +1,6 @@ | /* SPDX-License-Identifier: GPL-2.0 */ | #include <generated/utsrelease.h> |+#include <linux/module.h> | | /* Simply sanity version stamp for modules. */ | #ifdef CONFIG_SMP This works enough, but for further cleanups, I split MODULE_ARCH_VERMAGIC definitions into <asm/vermagic.h>. With this, <linux/module.h> and <linux/vermagic.h> will be orthogonal, and the location of MODULE_ARCH_VERMAGIC definitions will be consistent. For arc and ia64, MODULE_PROC_FAMILY is only used for defining MODULE_ARCH_VERMAGIC. I squashed it. For hexagon, nds32, and xtensa, I removed <asm/modules.h> entirely because they contained nothing but MODULE_ARCH_VERMAGIC definition. Kbuild will automatically generate <asm/modules.h> at build-time, wrapping <asm-generic/module.h>. [1] https://lore.kernel.org/lkml/20200411155623.GA22175@zn.tnic Reported-by: Borislav Petkov <bp@suse.de> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Acked-by: Jessica Yu <jeyu@kernel.org>
2020-04-16locking/barriers: Use '__unqual_scalar_typeof' for load-acquire macrosWill Deacon
Passing volatile-qualified pointers to the asm-generic implementations of the load-acquire macros results in a re-load from the stack due to the temporary result variable inheriting the volatile semantics thanks to the use of 'typeof()'. Define these temporary variables using 'unqual_scalar_typeof' to drop the volatile qualifier in the case that they are scalar types. Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Will Deacon <will@kernel.org>
2020-04-14Merge tag 'hyperv-fixes-signed' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux Pull hyperv fixes from Wei Liu: - a series from Tianyu Lan to fix crash reporting on Hyper-V - three miscellaneous cleanup patches * tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux: x86/Hyper-V: Report crash data in die() when panic_on_oops is set x86/Hyper-V: Report crash register data when sysctl_record_panic_msg is not set x86/Hyper-V: Report crash register data or kmsg before running crash kernel x86/Hyper-V: Trigger crash enlightenment only once during system crash. x86/Hyper-V: Free hv_panic_page when fail to register kmsg dump x86/Hyper-V: Unload vmbus channel in hv panic callback x86: hyperv: report value of misc_features hv_debugfs: Make hv_debug_root static hv: hyperv_vmbus.h: Replace zero-length array with flexible-array member
2020-04-13Merge tag 'v5.7-rc1' into locking/kcsan, to resolve conflicts and refreshIngo Molnar
Resolve these conflicts: arch/x86/Kconfig arch/x86/kernel/Makefile Do a minor "evil merge" to move the KCSAN entry up a bit by a few lines in the Kconfig to reduce the probability of future conflicts. Signed-off-by: Ingo Molnar <mingo@kernel.org>
2020-04-11x86/Hyper-V: Report crash data in die() when panic_on_oops is setTianyu Lan
When oops happens with panic_on_oops unset, the oops thread is killed by die() and system continues to run. In such case, guest should not report crash register data to host since system still runs. Check panic_on_oops and return directly in hyperv_report_panic() when the function is called in the die() and panic_on_oops is unset. Fix it. Fixes: 7ed4325a44ea ("Drivers: hv: vmbus: Make panic reporting to be more useful") Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/20200406155331.2105-7-Tianyu.Lan@microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
2020-04-07userfaultfd: wp: add pmd_swp_*uffd_wp() helpersPeter Xu
Adding these missing helpers for uffd-wp operations with pmd swap/migration entries. Signed-off-by: Peter Xu <peterx@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Jerome Glisse <jglisse@redhat.com> Reviewed-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Bobby Powers <bobbypowers@gmail.com> Cc: Brian Geffon <bgeffon@google.com> Cc: David Hildenbrand <david@redhat.com> Cc: Denis Plotnikov <dplotnikov@virtuozzo.com> Cc: "Dr . David Alan Gilbert" <dgilbert@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: "Kirill A . Shutemov" <kirill@shutemov.name> Cc: Martin Cracauer <cracauer@cons.org> Cc: Marty McFadden <mcfadden8@llnl.gov> Cc: Maya Gokhale <gokhale2@llnl.gov> Cc: Mel Gorman <mgorman@suse.de> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Pavel Emelyanov <xemul@openvz.org> Cc: Rik van Riel <riel@redhat.com> Cc: Shaohua Li <shli@fb.com> Link: http://lkml.kernel.org/r/20200220163112.11409-10-peterx@redhat.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-07userfaultfd: wp: add WP pagetable tracking to x86Andrea Arcangeli
Accurate userfaultfd WP tracking is possible by tracking exactly which virtual memory ranges were writeprotected by userland. We can't relay only on the RW bit of the mapped pagetable because that information is destroyed by fork() or KSM or swap. If we were to relay on that, we'd need to stay on the safe side and generate false positive wp faults for every swapped out page. [peterx@redhat.com: append _PAGE_UFD_WP to _PAGE_CHG_MASK] Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Peter Xu <peterx@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Jerome Glisse <jglisse@redhat.com> Reviewed-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: Bobby Powers <bobbypowers@gmail.com> Cc: Brian Geffon <bgeffon@google.com> Cc: David Hildenbrand <david@redhat.com> Cc: Denis Plotnikov <dplotnikov@virtuozzo.com> Cc: "Dr . David Alan Gilbert" <dgilbert@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: "Kirill A . Shutemov" <kirill@shutemov.name> Cc: Martin Cracauer <cracauer@cons.org> Cc: Marty McFadden <mcfadden8@llnl.gov> Cc: Maya Gokhale <gokhale2@llnl.gov> Cc: Mel Gorman <mgorman@suse.de> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Pavel Emelyanov <xemul@openvz.org> Cc: Rik van Riel <riel@redhat.com> Cc: Shaohua Li <shli@fb.com> Link: http://lkml.kernel.org/r/20200220163112.11409-4-peterx@redhat.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-07mm/vma: replace all remaining open encodings with is_vm_hugetlb_page()Anshuman Khandual
This replaces all remaining open encodings with is_vm_hugetlb_page(). Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Will Deacon <will@kernel.org> Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com> Cc: Nick Piggin <npiggin@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Guo Ren <guoren@kernel.org> Cc: Mel Gorman <mgorman@suse.de> Cc: Paul Burton <paulburton@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Rich Felker <dalias@libc.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Link: http://lkml.kernel.org/r/1582520593-30704-4-git-send-email-anshuman.khandual@arm.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-04Merge tag 'gpio-v5.7-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio Pull GPIO updates from Linus Walleij: "This is the bulk of GPIO development for the v5.7 kernel cycle. Core and userspace API: - The userspace API KFIFOs have been imoproved with locks that do not block interrupts. This makes us better at getting events to userspace without blocking or disturbing new events arriving in the same time. This was reviewed by the KFIFO maintainer Stefani. This is a generic improvement which paves the road for similar improvements in other subsystems. - We provide a new ioctl() for monitoring changes in the line information, such as when multiple clients are taking lines and giving them back, possibly reconfiguring them in the process: we can now monitor that and not get stuck with stale static information. - An example tool 'gpio-watch' is provided to showcase this functionality. - Timestamps for events are switched to ktime_get_ns() which is monotonic. We previously had a 'realtime' stamp which could move forward and *backward* in time, which probably would just cause silent bugs and weird behaviour. In the long run we see two relevant timestamps: ktime_get_ns() or the timestamp sometimes provided by the GPIO hardware itself, if that exists. - Device Tree overlay support for GPIO hogs. On systems that load overlays, these overlays can now contain hogs, and will then be respected. - Handle pin control interaction with nonexisting pin ranges in the GPIO library core instead of in the individual drivers. New drivers: - New driver for the Mellanox BlueField 2 GPIO controller. Driver improvements: - Introduce the BGPIOF_NO_SET_ON_INPUT flag to the generic MMIO GPIO library and use this flag in the MT7621 driver. - Texas Instruments OMAP CPU power management improvements, such as blocking of idle on pending GPIO interrupts" * tag 'gpio-v5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (59 commits) Revert "gpio: eic-sprd: Use devm_platform_ioremap_resource()" pinctrl: Unconditionally assign .request()/.free() gpio: Unconditionally assign .request()/.free() gpio: export of_pinctrl_get to modules pinctrl: Define of_pinctrl_get() dummy for !PINCTRL gpio: Rename variable in core APIs gpio: Avoid using pin ranges with !PINCTRL gpiolib: Remove unused gpio_chip parameter from gpio_set_bias() gpiolib: Pass gpio_desc to gpio_set_config() gpiolib: Introduce gpiod_set_config() tools: gpio: Fix out-of-tree build regression gpio: gpiolib: fix a doc warning gpio: tegra186: Add Tegra194 pin ranges for GG.0 and GG.1 gpio: tegra186: Add support for pin ranges gpio: Support GPIO controllers without pin-ranges ARM: integrator: impd1: Use GPIO_LOOKUP() helper macro gpio: brcmstb: support gpio-line-names property tools: gpio: Fix typo in gpio-utils tools: gpio-hammer: Apply scripts/Lindent and retain good changes gpiolib: gpio_name_to_desc: factor out !name check ...
2020-04-02asm-generic: make more kernel-space headers mandatoryMasahiro Yamada
Change a header to mandatory-y if both of the following are met: [1] At least one architecture (except um) specifies it as generic-y in arch/*/include/asm/Kbuild [2] Every architecture (except um) either has its own implementation (arch/*/include/asm/*.h) or specifies it as generic-y in arch/*/include/asm/Kbuild This commit was generated by the following shell script. ----------------------------------->8----------------------------------- arches=$(cd arch; ls -1 | sed -e '/Kconfig/d' -e '/um/d') tmpfile=$(mktemp) grep "^mandatory-y +=" include/asm-generic/Kbuild > $tmpfile find arch -path 'arch/*/include/asm/Kbuild' | xargs sed -n 's/^generic-y += \(.*\)/\1/p' | sort -u | while read header do mandatory=yes for arch in $arches do if ! grep -q "generic-y += $header" arch/$arch/include/asm/Kbuild && ! [ -f arch/$arch/include/asm/$header ]; then mandatory=no break fi done if [ "$mandatory" = yes ]; then echo "mandatory-y += $header" >> $tmpfile for arch in $arches do sed -i "/generic-y += $header/d" arch/$arch/include/asm/Kbuild done fi done sed -i '/^mandatory-y +=/d' include/asm-generic/Kbuild LANG=C sort $tmpfile >> include/asm-generic/Kbuild ----------------------------------->8----------------------------------- One obvious benefit is the diff stat: 25 files changed, 52 insertions(+), 557 deletions(-) It is tedious to list generic-y for each arch that needs it. So, mandatory-y works like a fallback default (by just wrapping asm-generic one) when arch does not have a specific header implementation. See the following commits: def3f7cefe4e81c296090e1722a76551142c227c a1b39bae16a62ce4aae02d958224f19316d98b24 It is tedious to convert headers one by one, so I processed by a shell script. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Michal Simek <michal.simek@xilinx.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Arnd Bergmann <arnd@arndb.de> Link: http://lkml.kernel.org/r/20200210175452.5030-1-masahiroy@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-03-31Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextLinus Torvalds
Pull networking updates from David Miller: "Highlights: 1) Fix the iwlwifi regression, from Johannes Berg. 2) Support BSS coloring and 802.11 encapsulation offloading in hardware, from John Crispin. 3) Fix some potential Spectre issues in qtnfmac, from Sergey Matyukevich. 4) Add TTL decrement action to openvswitch, from Matteo Croce. 5) Allow paralleization through flow_action setup by not taking the RTNL mutex, from Vlad Buslov. 6) A lot of zero-length array to flexible-array conversions, from Gustavo A. R. Silva. 7) Align XDP statistics names across several drivers for consistency, from Lorenzo Bianconi. 8) Add various pieces of infrastructure for offloading conntrack, and make use of it in mlx5 driver, from Paul Blakey. 9) Allow using listening sockets in BPF sockmap, from Jakub Sitnicki. 10) Lots of parallelization improvements during configuration changes in mlxsw driver, from Ido Schimmel. 11) Add support to devlink for generic packet traps, which report packets dropped during ACL processing. And use them in mlxsw driver. From Jiri Pirko. 12) Support bcmgenet on ACPI, from Jeremy Linton. 13) Make BPF compatible with RT, from Thomas Gleixnet, Alexei Starovoitov, and your's truly. 14) Support XDP meta-data in virtio_net, from Yuya Kusakabe. 15) Fix sysfs permissions when network devices change namespaces, from Christian Brauner. 16) Add a flags element to ethtool_ops so that drivers can more simply indicate which coalescing parameters they actually support, and therefore the generic layer can validate the user's ethtool request. Use this in all drivers, from Jakub Kicinski. 17) Offload FIFO qdisc in mlxsw, from Petr Machata. 18) Support UDP sockets in sockmap, from Lorenz Bauer. 19) Fix stretch ACK bugs in several TCP congestion control modules, from Pengcheng Yang. 20) Support virtual functiosn in octeontx2 driver, from Tomasz Duszynski. 21) Add region operations for devlink and use it in ice driver to dump NVM contents, from Jacob Keller. 22) Add support for hw offload of MACSEC, from Antoine Tenart. 23) Add support for BPF programs that can be attached to LSM hooks, from KP Singh. 24) Support for multiple paths, path managers, and counters in MPTCP. From Peter Krystad, Paolo Abeni, Florian Westphal, Davide Caratti, and others. 25) More progress on adding the netlink interface to ethtool, from Michal Kubecek" * git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2121 commits) net: ipv6: rpl_iptunnel: Fix potential memory leak in rpl_do_srh_inline cxgb4/chcr: nic-tls stats in ethtool net: dsa: fix oops while probing Marvell DSA switches net/bpfilter: remove superfluous testing message net: macb: Fix handling of fixed-link node net: dsa: ksz: Select KSZ protocol tag netdevsim: dev: Fix memory leak in nsim_dev_take_snapshot_write net: stmmac: add EHL 2.5Gbps PCI info and PCI ID net: stmmac: add EHL PSE0 & PSE1 1Gbps PCI info and PCI ID net: stmmac: create dwmac-intel.c to contain all Intel platform net: dsa: bcm_sf2: Support specifying VLAN tag egress rule net: dsa: bcm_sf2: Add support for matching VLAN TCI net: dsa: bcm_sf2: Move writing of CFP_DATA(5) into slicing functions net: dsa: bcm_sf2: Check earlier for FLOW_EXT and FLOW_MAC_EXT net: dsa: bcm_sf2: Disable learning for ASP port net: dsa: b53: Deny enslaving port 7 for 7278 into a bridge net: dsa: b53: Prevent tagged VLAN on port 7 for 7278 net: dsa: b53: Restore VLAN entries upon (re)configuration net: dsa: bcm_sf2: Fix overflow checks hv_netvsc: Remove unnecessary round_up for recv_completion_cnt ...
2020-03-31Merge branch 'x86-build-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 build updates from Ingo Molnar: "A handful of updates: two linker script cleanups and a stock defconfig+allmodconfig bootability fix" * 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/vdso: Discard .note.gnu.property sections in vDSO x86, vmlinux.lds: Add RUNTIME_DISCARD_EXIT to generic DISCARDS x86/Kconfig: Make CMDLINE_OVERRIDE depend on non-empty CMDLINE
2020-03-30Merge tag 'timers-core-2020-03-30' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timekeeping and timer updates from Thomas Gleixner: "Core: - Consolidation of the vDSO build infrastructure to address the difficulties of cross-builds for ARM64 compat vDSO libraries by restricting the exposure of header content to the vDSO build. This is achieved by splitting out header content into separate headers. which contain only the minimaly required information which is necessary to build the vDSO. These new headers are included from the kernel headers and the vDSO specific files. - Enhancements to the generic vDSO library allowing more fine grained control over the compiled in code, further reducing architecture specific storage and preparing for adopting the generic library by PPC. - Cleanup and consolidation of the exit related code in posix CPU timers. - Small cleanups and enhancements here and there Drivers: - The obligatory new drivers: Ingenic JZ47xx and X1000 TCU support - Correct the clock rate of PIT64b global clock - setup_irq() cleanup - Preparation for PWM and suspend support for the TI DM timer - Expand the fttmr010 driver to support ast2600 systems - The usual small fixes, enhancements and cleanups all over the place" * tag 'timers-core-2020-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (80 commits) Revert "clocksource/drivers/timer-probe: Avoid creating dead devices" vdso: Fix clocksource.h macro detection um: Fix header inclusion arm64: vdso32: Enable Clang Compilation lib/vdso: Enable common headers arm: vdso: Enable arm to use common headers x86/vdso: Enable x86 to use common headers mips: vdso: Enable mips to use common headers arm64: vdso32: Include common headers in the vdso library arm64: vdso: Include common headers in the vdso library arm64: Introduce asm/vdso/processor.h arm64: vdso32: Code clean up linux/elfnote.h: Replace elf.h with UAPI equivalent scripts: Fix the inclusion order in modpost common: Introduce processor.h linux/ktime.h: Extract common header for vDSO linux/jiffies.h: Extract common header for vDSO linux/time64.h: Extract common header for vDSO linux/time32.h: Extract common header for vDSO linux/time.h: Extract common header for vDSO ...
2020-03-28Merge branch 'uaccess.futex' of ↵Thomas Gleixner
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs into locking/core Pull uaccess futex cleanups for Al Viro: Consolidate access_ok() usage and the futex uaccess function zoo.
2020-03-27generic arch_futex_atomic_op_inuser() doesn't need access_ok()Al Viro
uses get_user() and put_user() for memory accesses Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-03-27futex: arch_futex_atomic_op_inuser() calling conventions changeAl Viro
Move access_ok() in and pagefault_enable()/pagefault_disable() out. Mechanical conversion only - some instances don't really need a separate access_ok() at all (e.g. the ones only using get_user()/put_user(), or architectures where access_ok() is always true); we'll deal with that in followups. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-03-27x86, vmlinux.lds: Add RUNTIME_DISCARD_EXIT to generic DISCARDSH.J. Lu
In the x86 kernel, .exit.text and .exit.data sections are discarded at runtime, not by the linker. Add RUNTIME_DISCARD_EXIT to generic DISCARDS and define it in the x86 kernel linker script to keep them. The sections are added before the DISCARD directive so document here only the situation explicitly as this change doesn't have any effect on the generated kernel. Also, other architectures like ARM64 will use it too so generalize the approach with the RUNTIME_DISCARD_EXIT define. [ bp: Massage and extend commit message. ] Signed-off-by: H.J. Lu <hjl.tools@gmail.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lkml.kernel.org/r/20200326193021.255002-1-hjl.tools@gmail.com
2020-03-21asm-generic, kcsan: Add KCSAN instrumentation for bitopsMarco Elver
Add explicit KCSAN checks for bitops. Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Marco Elver <elver@google.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2020-03-21asm-generic, atomic-instrumented: Use generic instrumented.hMarco Elver
This switches atomic-instrumented.h to use the generic instrumentation wrappers provided by instrumented.h. No functional change intended. Suggested-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Marco Elver <elver@google.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2020-03-21Merge branch 'x86/kdump' into locking/kcsan, to resolve conflictsIngo Molnar
Conflicts: arch/x86/purgatory/Makefile Signed-off-by: Ingo Molnar <mingo@kernel.org>
2020-03-19bpf: Support llvm-objcopy for vmlinux BTFFangrui Song
Simplify gen_btf logic to make it work with llvm-objcopy. The existing 'file format' and 'architecture' parsing logic is brittle and does not work with llvm-objcopy/llvm-objdump. 'file format' output of llvm-objdump>=11 will match GNU objdump, but 'architecture' (bfdarch) may not. .BTF in .tmp_vmlinux.btf is non-SHF_ALLOC. Add the SHF_ALLOC flag because it is part of vmlinux image used for introspection. C code can reference the section via linker script defined __start_BTF and __stop_BTF. This fixes a small problem that previous .BTF had the SHF_WRITE flag (objcopy -I binary -O elf* synthesized .data). Additionally, `objcopy -I binary` synthesized symbols _binary__btf_vmlinux_bin_start and _binary__btf_vmlinux_bin_stop (not used elsewhere) are replaced with more commonplace __start_BTF and __stop_BTF. Add 2>/dev/null because GNU objcopy (but not llvm-objcopy) warns "empty loadable segment detected at vaddr=0xffffffff81000000, is this intentional?" We use a dd command to change the e_type field in the ELF header from ET_EXEC to ET_REL so that lld will accept .btf.vmlinux.bin.o. Accepting ET_EXEC as an input file is an extremely rare GNU ld feature that lld does not intend to support, because this is error-prone. The output section description .BTF in include/asm-generic/vmlinux.lds.h avoids potential subtle orphan section placement issues and suppresses --orphan-handling=warn warnings. Fixes: df786c9b9476 ("bpf: Force .BTF section start to zero when dumping from vmlinux") Fixes: cb0cc635c7a9 ("powerpc: Include .BTF section") Reported-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Fangrui Song <maskray@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Tested-by: Stanislav Fomichev <sdf@google.com> Tested-by: Andrii Nakryiko <andriin@fb.com> Reviewed-by: Stanislav Fomichev <sdf@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Link: https://github.com/ClangBuiltLinux/linux/issues/871 Link: https://lore.kernel.org/bpf/20200318222746.173648-1-maskray@google.com
2020-03-06asm-generic/bitops: Update stale commentWill Deacon
The comment in 'asm-generic/bitops.h' states that you should "recode these in the native assembly language, if at all possible". This is pretty crappy advice now that the generic implementation is defined in terms of atomic_long_t rather than a spinlock, so update the comment and hopefully save future architecture maintainers a bit of work. Reported-by: Stefan Asserhall <stefana@xilinx.com> Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20200213093927.1836-1-will@kernel.org
2020-02-17lib/vdso: Avoid highres update if clocksource is not VDSO capableThomas Gleixner
If the current clocksource is not VDSO capable there is no point in updating the high resolution parts of the VDSO data. Replace the architecture specific check with a check for a VDSO capable clocksource and skip the update if there is none. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Link: https://lkml.kernel.org/r/20200207124403.563379423@linutronix.de
2020-02-17lib/vdso: Cleanup clock mode storage leftoversThomas Gleixner
Now that all architectures are converted to use the generic storage the helpers and conditionals can be removed. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Link: https://lkml.kernel.org/r/20200207124403.470699892@linutronix.de
2020-02-10gpio: Avoid kernel.h inclusion where it's possibleAndy Shevchenko
Inclusion of kernel.h increases the mess with the header dependencies. Avoid kernel.h inclusion where it's possible. Besides that, clean up a bit other inclusions inside GPIO subsystem headers. It includes: - removal pin control bits (forward declaration and header) from linux/gpio.h - removal of.h from asm-generic/gpio.h - use of explicit headers in gpio/consumer.h - add FIXME note with regard to gpio.h inclusion in of_gpio,h Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20200205134336.20197-1-andriy.shevchenko@linux.intel.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-02-04Merge tag 'microblaze-v5.6-rc1' of git://git.monstr.eu/linux-2.6-microblazeLinus Torvalds
Pull Microblaze update from Michal Simek: - enable CMA - add support for MB v11 - defconfig updates - minor fixes * tag 'microblaze-v5.6-rc1' of git://git.monstr.eu/linux-2.6-microblaze: microblaze: Add ID for Microblaze v11 microblaze: Prevent the overflow of the start microblaze: Wire CMA allocator asm-generic: Make dma-contiguous.h a mandatory include/asm header microblaze: Sync defconfig with latest Kconfig layout microblaze: defconfig: Disable EXT2 driver and Enable EXT3 & EXT4 drivers microblaze: Align comments with register usage
2020-02-04asm-generic: Make dma-contiguous.h a mandatory include/asm headerMichal Simek
dma-continuguous.h is generic for all architectures except arm32 which has its own version. Similar change was done for msi.h by commit a1b39bae16a6 ("asm-generic: Make msi.h a mandatory include/asm header") Suggested-by: Christoph Hellwig <hch@infradead.org> Link: https://lore.kernel.org/linux-arm-kernel/20200117080446.GA8980@lst.de/T/#m92bb56b04161057635d4142e1b3b9b6b0a70122e Signed-off-by: Michal Simek <michal.simek@xilinx.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Paul Walmsley <paul.walmsley@sifive.com> # for arch/riscv
2020-02-04Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge more updates from Andrew Morton: "The rest of MM and the rest of everything else: hotfixes, ipc, misc, procfs, lib, cleanups, arm" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (67 commits) ARM: dma-api: fix max_pfn off-by-one error in __dma_supported() treewide: remove redundant IS_ERR() before error code check include/linux/cpumask.h: don't calculate length of the input string lib: new testcases for bitmap_parse{_user} lib: rework bitmap_parse() lib: make bitmap_parse_user a wrapper on bitmap_parse lib: add test for bitmap_parse() bitops: more BITS_TO_* macros lib/string: add strnchrnul() proc: convert everything to "struct proc_ops" proc: decouple proc from VFS with "struct proc_ops" asm-generic/tlb: provide MMU_GATHER_TABLE_FREE asm-generic/tlb: rename HAVE_MMU_GATHER_NO_GATHER asm-generic/tlb: rename HAVE_MMU_GATHER_PAGE_SIZE asm-generic/tlb: rename HAVE_RCU_TABLE_FREE asm-generic/tlb: add missing CONFIG symbol asm-gemeric/tlb: remove stray function declarations asm-generic/tlb: avoid potential double flush mm/mmu_gather: invalidate TLB correctly on batch allocation failure and flush powerpc/mmu_gather: enable RCU_TABLE_FREE even for !SMP case ...
2020-02-04asm-generic/tlb: provide MMU_GATHER_TABLE_FREEPeter Zijlstra
As described in the comment, the correct order for freeing pages is: 1) unhook page 2) TLB invalidate page 3) free page This order equally applies to page directories. Currently there are two correct options: - use tlb_remove_page(), when all page directores are full pages and there are no futher contraints placed by things like software walkers (HAVE_FAST_GUP). - use MMU_GATHER_RCU_TABLE_FREE and tlb_remove_table() when the architecture does not do IPI based TLB invalidate and has HAVE_FAST_GUP (or software TLB fill). This however leaves architectures that don't have page based directories but don't need RCU in a bind. For those, provide MMU_GATHER_TABLE_FREE, which provides the independent batching for directories without the additional RCU freeing. Link: http://lkml.kernel.org/r/20200116064531.483522-10-aneesh.kumar@linux.ibm.com Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-02-04asm-generic/tlb: rename HAVE_MMU_GATHER_NO_GATHERPeter Zijlstra
Towards a more consistent naming scheme. Link: http://lkml.kernel.org/r/20200116064531.483522-9-aneesh.kumar@linux.ibm.com Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-02-04asm-generic/tlb: rename HAVE_MMU_GATHER_PAGE_SIZEPeter Zijlstra
Towards a more consistent naming scheme. Link: http://lkml.kernel.org/r/20200116064531.483522-8-aneesh.kumar@linux.ibm.com Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-02-04asm-generic/tlb: rename HAVE_RCU_TABLE_FREEPeter Zijlstra
Towards a more consistent naming scheme. [akpm@linux-foundation.org: fix sparc64 Kconfig] Link: http://lkml.kernel.org/r/20200116064531.483522-7-aneesh.kumar@linux.ibm.com Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-02-04asm-gemeric/tlb: remove stray function declarationsPeter Zijlstra
We removed the actual functions a while ago. Link: http://lkml.kernel.org/r/20200116064531.483522-5-aneesh.kumar@linux.ibm.com Fixes: 1808d65b55e4 ("asm-generic/tlb: Remove arch_tlb*_mmu()") Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-02-04asm-generic/tlb: avoid potential double flushPeter Zijlstra
Aneesh reported that: tlb_flush_mmu() tlb_flush_mmu_tlbonly() tlb_flush() <-- #1 tlb_flush_mmu_free() tlb_table_flush() tlb_table_invalidate() tlb_flush_mmu_tlbonly() tlb_flush() <-- #2 does two TLBIs when tlb->fullmm, because __tlb_reset_range() will not clear tlb->end in that case. Observe that any caller to __tlb_adjust_range() also sets at least one of the tlb->freed_tables || tlb->cleared_p* bits, and those are unconditionally cleared by __tlb_reset_range(). Change the condition for actually issuing TLBI to having one of those bits set, as opposed to having tlb->end != 0. Link: http://lkml.kernel.org/r/20200116064531.483522-4-aneesh.kumar@linux.ibm.com Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Reported-by: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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