kernel/git/stable/linux.git/arch/mips/include, branch linux-5.13.y

MIPS: check return value of pgtable_pmd_page_ctor

2021-08-12T11:32:10+00:00

[ Upstream commit 6aa32467299e9e12280a6aec9dbc21bf2db830b0 ] +. According to Documentation/vm/split_page_table_lock, handle failure of pgtable_pmd_page_ctor +. Use GFP_KERNEL_ACCOUNT instead of GFP_KERNEL|__GFP_ACCOUNT +. Adjust coding style Fixes: ed914d48b6a1 ("MIPS: add PMD table accounting into MIPS') Reported-by: Joshua Kinard Signed-off-by: Huang Pei Reviewed-by: Joshua Kinard Signed-off-by: Thomas Bogendoerfer Signed-off-by: Sasha Levin

MIPS: vdso: Invalid GIC access through VDSO

2021-07-20T14:00:42+00:00

[ Upstream commit 47ce8527fbba145a7723685bc9a27d9855e06491 ] Accessing raw timers (currently only CLOCK_MONOTONIC_RAW) through VDSO doesn't return the correct time when using the GIC as clock source. The address of the GIC mapped page is in this case not calculated correctly. The GIC mapped page is calculated from the VDSO data by subtracting PAGE_SIZE: void *get_gic(const struct vdso_data *data) { return (void __iomem *)data - PAGE_SIZE; } However, the data pointer is not page aligned for raw clock sources. This is because the VDSO data for raw clock sources (CS_RAW = 1) is stored after the VDSO data for coarse clock sources (CS_HRES_COARSE = 0). Therefore, only the VDSO data for CS_HRES_COARSE is page aligned: +--------------------+ | | | vd[CS_RAW] | ---+ | vd[CS_HRES_COARSE] | | +--------------------+ | -PAGE_SIZE | | | | GIC mapped page | <--+ | | +--------------------+ When __arch_get_hw_counter() is called with &vd[CS_RAW], get_gic returns the wrong address (somewhere inside the GIC mapped page). The GIC counter values are not returned which results in an invalid time. Fixes: a7f4df4e21dd ("MIPS: VDSO: Add implementations of gettimeofday() and clock_gettime()") Signed-off-by: Martin Fäcknitz Signed-off-by: Thomas Bogendoerfer Signed-off-by: Sasha Levin

MIPS: MT extensions are not available on MIPS32r1

2021-07-19T08:04:47+00:00

commit cad065ed8d8831df67b9754cc4437ed55d8b48c0 upstream. MIPS MT extensions were added with the MIPS 34K processor, which was based on the MIPS32r2 ISA. This fixes a build error when building a generic kernel for a MIPS32r1 CPU. Fixes: c434b9f80b09 ("MIPS: Kconfig: add MIPS_GENERIC_KERNEL symbol") Cc: stable@vger.kernel.org # v5.9 Signed-off-by: Paul Cercueil Signed-off-by: Thomas Bogendoerfer Signed-off-by: Greg Kroah-Hartman

MIPS: set mips32r5 for virt extensions

2021-07-19T08:04:46+00:00

[ Upstream commit c994a3ec7ecc8bd2a837b2061e8a76eb8efc082b ] Clang's integrated assembler only accepts these instructions when the cpu is set to mips32r5. With this change, we can assemble malta_defconfig with Clang via `make LLVM_IAS=1`. Link: https://github.com/ClangBuiltLinux/linux/issues/763 Reported-by: Dmitry Golovin Signed-off-by: Nick Desaulniers Signed-off-by: Thomas Bogendoerfer Signed-off-by: Sasha Levin

net: retrieve netns cookie via getsocketopt

2021-07-19T08:04:44+00:00

[ Upstream commit e8b9eab99232c4e62ada9d7976c80fd5e8118289 ] It's getting more common to run nested container environments for testing cloud software. One of such examples is Kind [1] which runs a Kubernetes cluster in Docker containers on a single host. Each container acts as a Kubernetes node, and thus can run any Pod (aka container) inside the former. This approach simplifies testing a lot, as it eliminates complicated VM setups. Unfortunately, such a setup breaks some functionality when cgroupv2 BPF programs are used for load-balancing. The load-balancer BPF program needs to detect whether a request originates from the host netns or a container netns in order to allow some access, e.g. to a service via a loopback IP address. Typically, the programs detect this by comparing netns cookies with the one of the init ns via a call to bpf_get_netns_cookie(NULL). However, in nested environments the latter cannot be used given the Kubernetes node's netns is outside the init ns. To fix this, we need to pass the Kubernetes node netns cookie to the program in a different way: by extending getsockopt() with a SO_NETNS_COOKIE option, the orchestrator which runs in the Kubernetes node netns can retrieve the cookie and pass it to the program instead. Thus, this is following up on Eric's commit 3d368ab87cf6 ("net: initialize net->net_cookie at netns setup") to allow retrieval via SO_NETNS_COOKIE. This is also in line in how we retrieve socket cookie via SO_COOKIE. [1] https://kind.sigs.k8s.io/ Signed-off-by: Lorenz Bauer Signed-off-by: Martynas Pumputis Cc: Eric Dumazet Reviewed-by: Eric Dumazet Signed-off-by: David S. Miller Signed-off-by: Sasha Levin

MIPS: add PMD table accounting into MIPS'pmd_alloc_one

2021-07-19T08:04:42+00:00

[ Upstream commit ed914d48b6a1040d1039d371b56273d422c0081e ] This fixes Page Table accounting bug. MIPS is the ONLY arch just defining __HAVE_ARCH_PMD_ALLOC_ONE alone. Since commit b2b29d6d011944 (mm: account PMD tables like PTE tables), "pmd_free" in asm-generic with PMD table accounting and "pmd_alloc_one" in MIPS without PMD table accounting causes PageTable accounting number negative, which read by global_zone_page_state(), always returns 0. Signed-off-by: Huang Pei Signed-off-by: Thomas Bogendoerfer Signed-off-by: Sasha Levin

hugetlb: clear huge pte during flush function on mips platform

2021-07-19T08:04:31+00:00

[ Upstream commit 33ae8f801ad8bec48e886d368739feb2816478f2 ] If multiple threads are accessing the same huge page at the same time, hugetlb_cow will be called if one thread write the COW huge page. And function huge_ptep_clear_flush is called to notify other threads to clear the huge pte tlb entry. The other threads clear the huge pte tlb entry and reload it from page table, the reload huge pte entry may be old. This patch fixes this issue on mips platform, and it clears huge pte entry before notifying other threads to flush current huge page entry, it is similar with other architectures. Signed-off-by: Bibo Mao Signed-off-by: Thomas Bogendoerfer Signed-off-by: Sasha Levin

MIPS: Fix PKMAP with 32-bit MIPS huge page support

2021-07-14T15:07:25+00:00

[ Upstream commit cf02ce742f09188272bcc8b0e62d789eb671fc4c ] When 32-bit MIPS huge page support is enabled, we halve the number of pointers a PTE page holds, making its last half go to waste. Correspondingly, we should halve the number of kmap entries, as we just initialized only a single pte table for that in pagetable_init(). Fixes: 35476311e529 ("MIPS: Add partial 32-bit huge page support") Signed-off-by: Wei Li Signed-off-by: Thomas Bogendoerfer Signed-off-by: Sasha Levin

MIPS: launch.h: add include guard to prevent build errors

2021-05-25T13:18:59+00:00

arch/mips/include/asm/mips-boards/launch.h needs an include guard to prevent it from being #included more than once. Prevents these build errors: In file included from ../arch/mips/mti-malta/malta-amon.c:16: ../arch/mips/include/asm/mips-boards/launch.h:8:8: error: redefinition of 'struct cpulaunch' 8 | struct cpulaunch { | ^~~~~~~~~ In file included from ../arch/mips/include/asm/mips-cps.h:13, from ../arch/mips/include/asm/smp-ops.h:16, from ../arch/mips/include/asm/smp.h:21, from ../include/linux/smp.h:114, from ../arch/mips/mti-malta/malta-amon.c:12: ../arch/mips/include/asm/mips-boards/launch.h:8:8: note: originally defined here 8 | struct cpulaunch { | ^~~~~~~~~ make[3]: [../scripts/Makefile.build:273: arch/mips/mti-malta/malta-amon.o] Error 1 (ignored) Fixes: 6decd1aad15f ("MIPS: add support for buggy MT7621S core detection") Signed-off-by: Randy Dunlap Reported-by: kernel test robot Cc: Thomas Bogendoerfer Cc: linux-mips@vger.kernel.org Cc: Ilya Lipnitskiy Reviewed-by: Ilya Lipnitskiy Signed-off-by: Thomas Bogendoerfer

Merge branch 'akpm' (patches from Andrew)

2021-05-07T07:34:51+00:00

Merge yet more updates from Andrew Morton: "This is everything else from -mm for this merge window. 90 patches. Subsystems affected by this patch series: mm (cleanups and slub), alpha, procfs, sysctl, misc, core-kernel, bitmap, lib, compat, checkpatch, epoll, isofs, nilfs2, hpfs, exit, fork, kexec, gcov, panic, delayacct, gdb, resource, selftests, async, initramfs, ipc, drivers/char, and spelling" * emailed patches from Andrew Morton : (90 commits) mm: fix typos in comments mm: fix typos in comments treewide: remove editor modelines and cruft ipc/sem.c: spelling fix fs: fat: fix spelling typo of values kernel/sys.c: fix typo kernel/up.c: fix typo kernel/user_namespace.c: fix typos kernel/umh.c: fix some spelling mistakes include/linux/pgtable.h: few spelling fixes mm/slab.c: fix spelling mistake "disired" -> "desired" scripts/spelling.txt: add "overflw" scripts/spelling.txt: Add "diabled" typo scripts/spelling.txt: add "overlfow" arm: print alloc free paths for address in registers mm/vmalloc: remove vwrite() mm: remove xlate_dev_kmem_ptr() drivers/char: remove /dev/kmem for good mm: fix some typos and code style problems ipc/sem.c: mundane typo fixes ...