kernel.git/arch/arm/Kconfig, branch linux-6.0.y

ARM: Drop CMDLINE_* dependency on ATAGS

2022-10-21T10:38:35Z

[ Upstream commit 136f4b1ec7c962ee37a787e095fd37b058d72bd3 ] On arm32, the configuration options to specify the kernel command line type depend on ATAGS. However, the actual CMDLINE cofiguration option does not depend on ATAGS, and the code that handles this is not specific to ATAGS (see drivers/of/fdt.c:early_init_dt_scan_chosen()). Hence users who desire to override the kernel command line on arm32 must enable support for ATAGS, even on a pure-DT system. Other architectures (arm64, loongarch, microblaze, nios2, powerpc, and riscv) do not impose such a restriction. Hence drop the dependency on ATAGS. Fixes: bd51e2f595580fb6 ("ARM: 7506/1: allow for ATAGS to be configured out when DT support is selected") Signed-off-by: Geert Uytterhoeven Acked-by: Ard Biesheuvel Signed-off-by: Arnd Bergmann Signed-off-by: Sasha Levin

Merge tag 'dma-mapping-5.20-2022-08-06' of git://git.infradead.org/users/hch/dma-mapping

2022-08-06T17:56:45Z

Pull dma-mapping updates from Christoph Hellwig: - convert arm32 to the common dma-direct code (Arnd Bergmann, Robin Murphy, Christoph Hellwig) - restructure the PCIe peer to peer mapping support (Logan Gunthorpe) - allow the IOMMU code to communicate an optional DMA mapping length and use that in scsi and libata (John Garry) - split the global swiotlb lock (Tianyu Lan) - various fixes and cleanup (Chao Gao, Dan Carpenter, Dongli Zhang, Lukas Bulwahn, Robin Murphy) * tag 'dma-mapping-5.20-2022-08-06' of git://git.infradead.org/users/hch/dma-mapping: (45 commits) swiotlb: fix passing local variable to debugfs_create_ulong() dma-mapping: reformat comment to suppress htmldoc warning PCI/P2PDMA: Remove pci_p2pdma_[un]map_sg() RDMA/rw: drop pci_p2pdma_[un]map_sg() RDMA/core: introduce ib_dma_pci_p2p_dma_supported() nvme-pci: convert to using dma_map_sgtable() nvme-pci: check DMA ops when indicating support for PCI P2PDMA iommu/dma: support PCI P2PDMA pages in dma-iommu map_sg iommu: Explicitly skip bus address marked segments in __iommu_map_sg() dma-mapping: add flags to dma_map_ops to indicate PCI P2PDMA support dma-direct: support PCI P2PDMA pages in dma-direct map_sg dma-mapping: allow EREMOTEIO return code for P2PDMA transfers PCI/P2PDMA: Introduce helpers for dma_map_sg implementations PCI/P2PDMA: Attempt to set map_type if it has not been set lib/scatterlist: add flag for indicating P2PDMA segments in an SGL swiotlb: clean up some coding style and minor issues dma-mapping: update comment after dmabounce removal scsi: sd: Add a comment about limiting max_sectors to shost optimal limit ata: libata-scsi: cap ata_device->max_sectors according to shost->max_sectors scsi: scsi_transport_sas: cap shost opt_sectors according to DMA optimal limit ...

Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

2022-08-04T22:31:09Z

Pull ARM updates from Russell King: "Not much this time around, the 5.20-rc1 development updates for arm are: - add KASAN support for vmalloc space on arm - some sparse fixes from Ben Dooks - rework amba device handling (so device addition isn't deferred)" * tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: ARM: 9220/1: amba: Remove deferred device addition ARM: 9219/1: fix undeclared soft_restart ARM: 9218/1: dma-mapping: fix pointer/integer warning ARM: 9217/1: add definition of arch_irq_work_raise() ARM: 9203/1: kconfig: fix MODULE_PLTS for KASAN with KASAN_VMALLOC ARM: 9202/1: kasan: support CONFIG_KASAN_VMALLOC

Merge tag 'rcu.2022.07.26a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu

2022-08-03T02:12:45Z

Pull RCU updates from Paul McKenney: - Documentation updates - Miscellaneous fixes - Callback-offload updates, perhaps most notably a new RCU_NOCB_CPU_DEFAULT_ALL Kconfig option that causes all CPUs to be offloaded at boot time, regardless of kernel boot parameters. This is useful to battery-powered systems such as ChromeOS and Android. In addition, a new RCU_NOCB_CPU_CB_BOOST kernel boot parameter prevents offloaded callbacks from interfering with real-time workloads and with energy-efficiency mechanisms - Polled grace-period updates, perhaps most notably making these APIs account for both normal and expedited grace periods - Tasks RCU updates, perhaps most notably reducing the CPU overhead of RCU tasks trace grace periods by more than a factor of two on a system with 15,000 tasks. The reduction is expected to increase with the number of tasks, so it seems reasonable to hypothesize that a system with 150,000 tasks might see a 20-fold reduction in CPU overhead - Torture-test updates - Updates that merge RCU's dyntick-idle tracking into context tracking, thus reducing the overhead of transitioning to kernel mode from either idle or nohz_full userspace execution for kernels that track context independently of RCU. This is expected to be helpful primarily for kernels built with CONFIG_NO_HZ_FULL=y * tag 'rcu.2022.07.26a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: (98 commits) rcu: Add irqs-disabled indicator to expedited RCU CPU stall warnings rcu: Diagnose extended sync_rcu_do_polled_gp() loops rcu: Put panic_on_rcu_stall() after expedited RCU CPU stall warnings rcutorture: Test polled expedited grace-period primitives rcu: Add polled expedited grace-period primitives rcutorture: Verify that polled GP API sees synchronous grace periods rcu: Make Tiny RCU grace periods visible to polled APIs rcu: Make polled grace-period API account for expedited grace periods rcu: Switch polled grace-period APIs to ->gp_seq_polled rcu/nocb: Avoid polling when my_rdp->nocb_head_rdp list is empty rcu/nocb: Add option to opt rcuo kthreads out of RT priority rcu: Add nocb_cb_kthread check to rcu_is_callbacks_kthread() rcu/nocb: Add an option to offload all CPUs on boot rcu/nocb: Fix NOCB kthreads spawn failure with rcu_nocb_rdp_deoffload() direct call rcu/nocb: Invert rcu_state.barrier_mutex VS hotplug lock locking order rcu/nocb: Add/del rdp to iterate from rcuog itself rcu/tree: Add comment to describe GP-done condition in fqs loop rcu: Initialize first_gp_fqs at declaration in rcu_gp_fqs() rcu/kvfree: Remove useless monitor_todo flag rcu: Cleanup RCU urgency state for offline CPU ...

Merge tag 'arm-boardfiles-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

2022-08-02T15:35:17Z

Pull ARM boardfile deprecation from Arnd Bergmann: "Over the past ten years, new machine support was based on device tree, and an initial set of about 400 boards using ATAGS with boardfile for booting were grandfathered in, with about half of them either removed or converted to DT over time. Based on the recent mailing list discussion I started, I have now turned the findings into a set of patches that marks most board files as 'depends on UNUSED_BOARD_FILES', leaving only 38 of the 196 boards. For the boards that are marked as unused, there are two final chances for potential users: The removal is scheduled to take place after the longterm stable kernel at the end of 2022, so users can stay on that version for another few years, and if anyone still has one of these machines and is planning to keep updating kernels beyond that version, they can speak up now to have their boards taken off the list again. Waiting for the LTS release also makes sure that there will be at least one longterm kernel that contains the recent multiplatform conversion along while still supporting all legacy boards. The short summary of the current status is: - The s3c24xx, cns3xxx, iop32x and mv78xx0 platforms have no known users and will be removed entirely. - The mmp and davinci platforms have DT support for the important machines and will become DT-only after this. - s3c64xx, dove, orion5x, and pxa keep some board files to allow those to be migrated over to DT more easily, but most board files are getting removed now. DT support on these platforms is partially working but requires changes to additional drivers for the other boards. - omap1, ep93xx, sa1100, footbridge and rpc have no DT support at the moment but have some boards with known users. Removing the board files that nobody uses should make it easier to try a DT conversion if anyone cares. There is no explicit timeline what happens with the boards that remain after this removal, but I expect to revisit this in the future, and with most boards gone, there will be a good time to do a treewide review of platform drivers that never gained DT support and have no remaining in-tree board files" Link: https://lore.kernel.org/linux-arm-kernel/CAK8P3a0Z9vGEQbVRBo84bSyPFM-LF+hs5w8ZA51g2Z+NsdtDQA@mail.gmail.com/ * tag 'arm-boardfiles-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: ARM: cns3xxx: add CONFIG_UNUSED_BOARD_FILES dependency ARM: iop32x: mark as unused ARM: s3c: mark most board files as unused ARM: omap1: add Kconfig dependencies for unused boards ARM: sa1100: mark most boards as unused ARM: footbridge: mark cats board for removal ARM: mmp: mark all board files for removal ARM: ep93xx: mark most board files as unused ARM: davinci: mark all ATAGS board files as unused ARM: orion: add ATAGS dependencies ARM: pxa: add Kconfig dependencies for ATAGS based boards ARM: add CONFIG_UNUSED_BOARD_FILES ARM: add ATAGS dependencies to non-DT platforms

ARM: 9203/1: kconfig: fix MODULE_PLTS for KASAN with KASAN_VMALLOC

2022-07-28T14:09:13Z

When we run out of module space address with ko insertion, and with MODULE_PLTS, module would turn to try to find memory from VMALLOC address space. Unfortunately, with KASAN enabled, VMALLOC doesn't work without KASAN_VMALLOC, thus select KASAN_VMALLOC by default. 8<--- cut here --- Unable to handle kernel paging request at virtual address bd300860 [bd300860] *pgd=41cf1811, *pte=41cf26df, *ppte=41cf265f Internal error: Oops: 80f [#1] PREEMPT SMP ARM Modules linked in: hello(O+) CPU: 0 PID: 89 Comm: insmod Tainted: G O 5.16.0-rc6+ #19 Hardware name: Generic DT based system PC is at mmioset+0x30/0xa8 LR is at 0x0 pc : [] lr : [<00000000>] psr: 20000013 sp : c451fc18 ip : bd300860 fp : c451fc2c r10: f18042cc r9 : f18042d0 r8 : 00000000 r7 : 00000001 r6 : 00000003 r5 : 01312d00 r4 : f1804300 r3 : 00000000 r2 : 00262560 r1 : 00000000 r0 : bd300860 Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 10c5387d Table: 43e9406a DAC: 00000051 Register r0 information: non-paged memory Register r1 information: NULL pointer Register r2 information: non-paged memory Register r3 information: NULL pointer Register r4 information: 4887-page vmalloc region starting at 0xf1802000 allocated at load_module+0x14f4/0x32a8 Register r5 information: non-paged memory Register r6 information: non-paged memory Register r7 information: non-paged memory Register r8 information: NULL pointer Register r9 information: 4887-page vmalloc region starting at 0xf1802000 allocated at load_module+0x14f4/0x32a8 Register r10 information: 4887-page vmalloc region starting at 0xf1802000 allocated at load_module+0x14f4/0x32a8 Register r11 information: non-slab/vmalloc memory Register r12 information: non-paged memory Process insmod (pid: 89, stack limit = 0xc451c000) Stack: (0xc451fc18 to 0xc4520000) fc00: f18041f0 c04803a4 fc20: c451fc44 c451fc30 c048053c c0480358 f1804030 01312cff c451fc64 c451fc48 fc40: c047f330 c0480500 f18040c0 c1b52ccc 00000001 c5be7700 c451fc74 c451fc68 fc60: f1802098 c047f300 c451fcb4 c451fc78 c026106c f180208c c4880004 00000000 fc80: c451fcb4 bf001000 c044ff48 c451fec0 f18040c0 00000000 c1b54cc4 00000000 fca0: c451fdf0 f1804268 c451fe64 c451fcb8 c0264e88 c0260d48 ffff8000 00007fff fcc0: f18040c0 c025cd00 c451fd14 00000003 0157f008 f1804258 f180425c f1804174 fce0: f1804154 f180424c f18041f0 f180414c f1804178 f18041c0 bf0025d4 188a3fa8 fd00: 0000009e f1804170 f2b18000 c451ff10 c0d92e40 f180416c c451feec 00000001 fd20: 00000000 c451fec8 c451fe20 c451fed0 f18040cc 00000000 f17ea000 c451fdc0 fd40: 41b58ab3 c1387729 c0261c28 c047fb5c c451fe2c c451fd60 c0525308 c048033c fd60: 188a3fb4 c3ccb090 c451fe00 c3ccb080 00000000 00000000 00016920 00000000 fd80: c02d0388 c047f55c c02d0388 00000000 c451fddc c451fda0 c02d0388 00000000 fda0: 41b58ab3 c13a72d0 c0524ff0 c1705f48 c451fdfc c451fdc0 c02d0388 c047f55c fdc0: 00016920 00000000 00000003 c1bb2384 c451fdfc c3ccb080 c1bb2384 00000000 fde0: 00000000 00000000 00000000 00000000 c451fe1c c451fe00 c04e9d70 c1705f48 fe00: c1b54cc4 c1bbc71c c3ccb080 00000000 c3ccb080 00000000 00000003 c451fec0 fe20: c451fe64 c451fe30 c0525918 c0524ffc c451feb0 c1705f48 00000000 c1b54cc4 fe40: b78a3fd0 c451ff60 00000000 0157f008 00000003 c451fec0 c451ffa4 c451fe68 fe60: c0265480 c0261c34 c451feb0 7fffffff 00000000 00000002 00000000 c4880000 fe80: 41b58ab3 c138777b c02652cc c04803ec 000a0000 c451ff00 ffffff9c b6ac9f60 fea0: c451fed4 c1705f48 c04a4a90 b78a3fdc f17ea000 ffffff9c b6ac9f60 c0100244 fec0: f17ea21a f17ea300 f17ea000 00016920 f1800240 f18000ac f17fb7dc 01316000 fee0: 013161b0 00002590 01316250 00000000 00000000 00000000 00002580 00000029 ff00: 0000002a 00000013 00000000 0000000c 00000000 00000000 0157f004 c451ffb0 ff20: c1719be0 aed6f410 c451ff74 c451ff38 c0c4103c c0c407d0 c451ff84 c451ff48 ff40: 00000805 c02c8658 c1604230 c1719c30 00000805 0157f004 00000005 c451ffb0 ff60: c1719be0 aed6f410 c451ffac c451ff78 c0122130 c1705f48 c451ffac 0157f008 ff80: 00000006 0000005f 0000017b c0100244 c4880000 0000017b 00000000 c451ffa8 ffa0: c0100060 c02652d8 0157f008 00000006 00000003 0157f008 00000000 b6ac9f60 ffc0: 0157f008 00000006 0000005f 0000017b 00000000 00000000 aed85f74 00000000 ffe0: b6ac9cd8 b6ac9cc8 00030200 aecf2d60 a0000010 00000003 00000000 00000000 Backtrace: [] (kasan_poison) from [] (kasan_unpoison+0x48/0x5c) [] (kasan_unpoison) from [] (__asan_register_globals+0x3c/0x64) r5:01312cff r4:f1804030 [] (__asan_register_globals) from [] (_sub_I_65535_1+0x18/0xf80 [hello]) r7:c5be7700 r6:00000001 r5:c1b52ccc r4:f18040c0 [] (_sub_I_65535_1 [hello]) from [] (do_init_module+0x330/0x72c) [] (do_init_module) from [] (load_module+0x3260/0x32a8) r10:f1804268 r9:c451fdf0 r8:00000000 r7:c1b54cc4 r6:00000000 r5:f18040c0 r4:c451fec0 [] (load_module) from [] (sys_finit_module+0x1b4/0x1e8) r10:c451fec0 r9:00000003 r8:0157f008 r7:00000000 r6:c451ff60 r5:b78a3fd0 r4:c1b54cc4 [] (sys_finit_module) from [] (ret_fast_syscall+0x0/0x1c) Exception stack(0xc451ffa8 to 0xc451fff0) ffa0: 0157f008 00000006 00000003 0157f008 00000000 b6ac9f60 ffc0: 0157f008 00000006 0000005f 0000017b 00000000 00000000 aed85f74 00000000 ffe0: b6ac9cd8 b6ac9cc8 00030200 aecf2d60 r10:0000017b r9:c4880000 r8:c0100244 r7:0000017b r6:0000005f r5:00000006 r4:0157f008 Code: e92d4100 e1a08001 e1a0e003 e2522040 (a8ac410a) ---[ end trace df6e12843197b6f5 ]--- Signed-off-by: Lecopzer Chen Tested-by: Linus Walleij Reviewed-by: Linus Walleij Signed-off-by: Russell King (Oracle)

ARM: 9202/1: kasan: support CONFIG_KASAN_VMALLOC

2022-07-28T14:09:12Z

Simply make shadow of vmalloc area mapped on demand. Since the virtual address of vmalloc for Arm is also between MODULE_VADDR and 0x100000000 (ZONE_HIGHMEM), which means the shadow address has already included between KASAN_SHADOW_START and KASAN_SHADOW_END. Thus we need to change nothing for memory map of Arm. This can fix ARM_MODULE_PLTS with KASan, support KASan for higmem and support CONFIG_VMAP_STACK with KASan. Signed-off-by: Lecopzer Chen Tested-by: Linus Walleij Reviewed-by: Linus Walleij Signed-off-by: Russell King (Oracle)

ARM: add CONFIG_UNUSED_BOARD_FILES

2022-07-22T11:11:21Z

Based on the recent mailing list discussion, most board file support has no remaining users and can be scheduled for removal early next year. If a board is still found to have users, it will remain for this round but users are encouraged to migrate to devicetree based booting where possible. The timing is meant to ensure the next longterm supported kernel still contains all the board files, giving another year of support for potential users that did not speak up and would otherwise be stuck on the v5.15.y longterm kernel from 2021. Link: https://lore.kernel.org/all/CAK8P3a0Z9vGEQbVRBo84bSyPFM-LF+hs5w8ZA51g2Z+NsdtDQA@mail.gmail.com/ Link: https://docs.google.com/spreadsheets/d/1PL4dUUSieeXHzZhAn_Rnix32OTiCfN33sCQejpvI6ng/edit#gid=0 Signed-off-by: Arnd Bergmann

ARM: add ATAGS dependencies to non-DT platforms

2022-07-22T11:11:21Z

There are a total of eight platforms that only suppor ATAGS based boot with board files but no devicetree booting. For dove, the DT support is part of the mvebu platform, which shares driver but no code in arch/arm. Most of these will never get converted to DT, and the majority of the board files appear to be entirely unused already. There are still known users on a few machines, and there may be interest in converting some omap1, ep93xx or footbridge machines over in the future. For the moment, just add a Kconfig dependency to hide these platforms completely when CONFIG_ATAGS is disabled, and reorder the priority of the options: Rather than offering to turn ATAGS off for platforms that have DT support, make it a top-level setting that determines which platforms are visible. The s3c24xx platform supports one machine with DT support, but it cannot be built without also including ATAGS support, and the entire platform is scheduled for removal, so leaving the entire platform behind a dependency seems good enough. All defconfig files should keep working, as the option remains default enabled. Signed-off-by: Arnd Bergmann

ARM: sunplus: Add initial support for Sunplus SP7021 SoC

2022-07-08T12:24:14Z

This patch aims to add an initial support for Sunplus SP7021 SoC. Signed-off-by: Qin Jian Reviewed-by: Arnd Bergmann Signed-off-by: Arnd Bergmann