kernel/linux.git/arch/powerpc/include/asm/book3s, branch linux-5.3.y

powerpc/32s: fix allow/prevent_user_access() when crossing segment boundaries.

2019-11-12T18:27:36+00:00

[ Upstream commit d10f60ae27d26d811e2a1bb39ded47df96d7499f ] Make sure starting addr is aligned to segment boundary so that when incrementing the segment, the starting address of the new segment is below the end address. Otherwise the last segment might get missed. Fixes: a68c31fc01ef ("powerpc/32s: Implement Kernel Userspace Access Protection") Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/067a1b09f15f421d40797c2d04c22d4049a1cee8.1571071875.git.christophe.leroy@c-s.fr Signed-off-by: Sasha Levin

mm: introduce ARCH_HAS_PTE_DEVMAP

2019-07-17T02:23:25+00:00

ARCH_HAS_ZONE_DEVICE is somewhat meaningless in itself, and combined with the long-out-of-date comment can lead to the impression than an architecture may just enable it (since __add_pages() now "comprehends device memory" for itself) and expect things to work. In practice, however, ZONE_DEVICE users have little chance of functioning correctly without __HAVE_ARCH_PTE_DEVMAP, so let's clean that up the same way as ARCH_HAS_PTE_SPECIAL and make it the proper dependency so the real situation is clearer. Link: http://lkml.kernel.org/r/87554aa78478a02a63f2c4cf60a847279ae3eb3b.1558547956.git.robin.murphy@arm.com Signed-off-by: Robin Murphy Acked-by: Dan Williams Reviewed-by: Ira Weiny Acked-by: Oliver O'Halloran Reviewed-by: Anshuman Khandual Cc: Michael Ellerman Cc: Catalin Marinas Cc: David Hildenbrand Cc: Jerome Glisse Cc: Michal Hocko Cc: Will Deacon Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge tag 'powerpc-5.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

2019-07-13T23:08:36+00:00

Pull powerpc updates from Michael Ellerman: "Notable changes: - Removal of the NPU DMA code, used by the out-of-tree Nvidia driver, as well as some other functions only used by drivers that haven't (yet?) made it upstream. - A fix for a bug in our handling of hardware watchpoints (eg. perf record -e mem: ...) which could lead to register corruption and kernel crashes. - Enable HAVE_ARCH_HUGE_VMAP, which allows us to use large pages for vmalloc when using the Radix MMU. - A large but incremental rewrite of our exception handling code to use gas macros rather than multiple levels of nested CPP macros. And the usual small fixes, cleanups and improvements. Thanks to: Alastair D'Silva, Alexey Kardashevskiy, Andreas Schwab, Aneesh Kumar K.V, Anju T Sudhakar, Anton Blanchard, Arnd Bergmann, Athira Rajeev, Cédric Le Goater, Christian Lamparter, Christophe Leroy, Christophe Lombard, Christoph Hellwig, Daniel Axtens, Denis Efremov, Enrico Weigelt, Frederic Barrat, Gautham R. Shenoy, Geert Uytterhoeven, Geliang Tang, Gen Zhang, Greg Kroah-Hartman, Greg Kurz, Gustavo Romero, Krzysztof Kozlowski, Madhavan Srinivasan, Masahiro Yamada, Mathieu Malaterre, Michael Neuling, Nathan Lynch, Naveen N. Rao, Nicholas Piggin, Nishad Kamdar, Oliver O'Halloran, Qian Cai, Ravi Bangoria, Sachin Sant, Sam Bobroff, Satheesh Rajendran, Segher Boessenkool, Shaokun Zhang, Shawn Anastasio, Stewart Smith, Suraj Jitindar Singh, Thiago Jung Bauermann, YueHaibing" * tag 'powerpc-5.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (163 commits) powerpc/powernv/idle: Fix restore of SPRN_LDBAR for POWER9 stop state. powerpc/eeh: Handle hugepages in ioremap space ocxl: Update for AFU descriptor template version 1.1 powerpc/boot: pass CONFIG options in a simpler and more robust way powerpc/boot: add {get, put}_unaligned_be32 to xz_config.h powerpc/irq: Don't WARN continuously in arch_local_irq_restore() powerpc/module64: Use symbolic instructions names. powerpc/module32: Use symbolic instructions names. powerpc: Move PPC_HA() PPC_HI() and PPC_LO() to ppc-opcode.h powerpc/module64: Fix comment in R_PPC64_ENTRY handling powerpc/boot: Add lzo support for uImage powerpc/boot: Add lzma support for uImage powerpc/boot: don't force gzipped uImage powerpc/8xx: Add microcode patch to move SMC parameter RAM. powerpc/8xx: Use IO accessors in microcode programming. powerpc/8xx: replace #ifdefs by IS_ENABLED() in microcode.c powerpc/8xx: refactor programming of microcode CPM params. powerpc/8xx: refactor printing of microcode patch name. powerpc/8xx: Refactor microcode write powerpc/8xx: refactor writing of CPM microcode arrays ...

powerpc/book3s: Use config independent helpers for page table walk

2019-07-04T14:43:50+00:00

Even when we have HugeTLB and THP disabled, kernel linear map can still be mapped with hugepages. This is only an issue with radix translation because hash MMU doesn't map kernel linear range in linux page table and other kernel map areas are not mapped using hugepage. Add config independent helpers and put WARN_ON() when we don't expect things to be mapped via hugepages. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman

powerpc/mm: Remove unused variable declaration

2019-07-04T14:20:42+00:00

Since commit 0034d395f89d ("powerpc/mm/hash64: Map all the kernel regions in the same 0xc range") __kernel_virt_size is not used anymore. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman

powerpc/powernv: remove unused NPU DMA code

2019-07-01T06:26:55+00:00

None of these routines were ever used anywhere in the kernel tree since they were added to the kernel. Signed-off-by: Christoph Hellwig Signed-off-by: Michael Ellerman

Merge branch 'fixes' into next

2019-07-01T04:04:39+00:00

Merge our fixes branch into next, this brings in a number of commits that fix bugs we don't want to hit in next, in particular the fix for CVE-2019-12817.

powerpc/64s/radix: Enable HAVE_ARCH_HUGE_VMAP

2019-06-19T10:05:09+00:00

This sets the HAVE_ARCH_HUGE_VMAP option, and defines the required page table functions. This enables huge (2MB and 1GB) ioremap mappings. I don't have a benchmark for this change, but huge vmap will be used by a later core kernel change to enable huge vmalloc memory mappings. This improves cached `git diff` performance by about 5% on a 2-node POWER9 with 32MB size dentry cache hash. Profiling git diff dTLB misses with a vanilla kernel: 81.75% git [kernel.vmlinux] [k] __d_lookup_rcu 7.21% git [kernel.vmlinux] [k] strncpy_from_user 1.77% git [kernel.vmlinux] [k] find_get_entry 1.59% git [kernel.vmlinux] [k] kmem_cache_free 40,168 dTLB-miss 0.100342754 seconds time elapsed With powerpc huge vmalloc: 2,987 dTLB-miss 0.095933138 seconds time elapsed Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman

powerpc/64s/radix: ioremap use ioremap_page_range

2019-06-19T10:05:09+00:00

Radix can use ioremap_page_range for ioremap, after slab is available. This makes it possible to enable huge ioremap mapping support. Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman

Merge tag 'powerpc-5.2-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

2019-06-15T17:29:32+00:00

Pull powerpc fixes from Michael Ellerman: "One fix for a regression introduced by our 32-bit KASAN support, which broke booting on machines with "bootx" early debugging enabled. A fix for a bug which broke kexec on 32-bit, introduced by changes to the 32-bit STRICT_KERNEL_RWX support in v5.1. Finally two fixes going to stable for our THP split/collapse handling, discovered by Nick. The first fixes random crashes and/or corruption in guests under sufficient load. Thanks to: Nicholas Piggin, Christophe Leroy, Aaro Koskinen, Mathieu Malaterre" * tag 'powerpc-5.2-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/32s: fix booting with CONFIG_PPC_EARLY_DEBUG_BOOTX powerpc/64s: __find_linux_pte() synchronization vs pmdp_invalidate() powerpc/64s: Fix THP PMD collapse serialisation powerpc: Fix kexec failure on book3s/32