wireguard-linux/arch/arm64, branch jd/unified-crypt-queue

mm/memory_hotplug: add pgprot_t to mhp_params

2020-04-10T22:36:21Z

devm_memremap_pages() is currently used by the PCI P2PDMA code to create struct page mappings for IO memory. At present, these mappings are created with PAGE_KERNEL which implies setting the PAT bits to be WB. However, on x86, an mtrr register will typically override this and force the cache type to be UC-. In the case firmware doesn't set this register it is effectively WB and will typically result in a machine check exception when it's accessed. Other arches are not currently likely to function correctly seeing they don't have any MTRR registers to fall back on. To solve this, provide a way to specify the pgprot value explicitly to arch_add_memory(). Of the arches that support MEMORY_HOTPLUG: x86_64, and arm64 need a simple change to pass the pgprot_t down to their respective functions which set up the page tables. For x86_32, set the page tables explicitly using _set_memory_prot() (seeing they are already mapped). For ia64, s390 and sh, reject anything but PAGE_KERNEL settings -- this should be fine, for now, seeing these architectures don't support ZONE_DEVICE. A check in __add_pages() is also added to ensure the pgprot parameter was set for all arches. Signed-off-by: Logan Gunthorpe Signed-off-by: Andrew Morton Acked-by: David Hildenbrand Acked-by: Michal Hocko Acked-by: Dan Williams Cc: Andy Lutomirski Cc: Benjamin Herrenschmidt Cc: Borislav Petkov Cc: Catalin Marinas Cc: Christoph Hellwig Cc: Dave Hansen Cc: Eric Badger Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Jason Gunthorpe Cc: Michael Ellerman Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Will Deacon Link: http://lkml.kernel.org/r/20200306170846.9333-7-logang@deltatee.com Signed-off-by: Linus Torvalds

mm/memory_hotplug: rename mhp_restrictions to mhp_params

2020-04-10T22:36:21Z

The mhp_restrictions struct really doesn't specify anything resembling a restriction anymore so rename it to be mhp_params as it is a list of extended parameters. Signed-off-by: Logan Gunthorpe Signed-off-by: Andrew Morton Reviewed-by: David Hildenbrand Reviewed-by: Dan Williams Acked-by: Michal Hocko Cc: Andy Lutomirski Cc: Benjamin Herrenschmidt Cc: Borislav Petkov Cc: Catalin Marinas Cc: Christoph Hellwig Cc: Dave Hansen Cc: Eric Badger Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Jason Gunthorpe Cc: Michael Ellerman Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Will Deacon Link: http://lkml.kernel.org/r/20200306170846.9333-3-logang@deltatee.com Signed-off-by: Linus Torvalds

mm/vma: introduce VM_ACCESS_FLAGS

2020-04-10T22:36:21Z

There are many places where all basic VMA access flags (read, write, exec) are initialized or checked against as a group. One such example is during page fault. Existing vma_is_accessible() wrapper already creates the notion of VMA accessibility as a group access permissions. Hence lets just create VM_ACCESS_FLAGS (VM_READ|VM_WRITE|VM_EXEC) which will not only reduce code duplication but also extend the VMA accessibility concept in general. Signed-off-by: Anshuman Khandual Signed-off-by: Andrew Morton Reviewed-by: Vlastimil Babka Cc: Russell King Cc: Catalin Marinas Cc: Mark Salter Cc: Nick Hu Cc: Ley Foon Tan Cc: Michael Ellerman Cc: Heiko Carstens Cc: Yoshinori Sato Cc: Guan Xuetao Cc: Dave Hansen Cc: Thomas Gleixner Cc: Rob Springer Cc: Greg Kroah-Hartman Cc: Geert Uytterhoeven Link: http://lkml.kernel.org/r/1583391014-8170-3-git-send-email-anshuman.khandual@arm.com Signed-off-by: Linus Torvalds

mm/vma: define a default value for VM_DATA_DEFAULT_FLAGS

2020-04-10T22:36:21Z

There are many platforms with exact same value for VM_DATA_DEFAULT_FLAGS This creates a default value for VM_DATA_DEFAULT_FLAGS in line with the existing VM_STACK_DEFAULT_FLAGS. While here, also define some more macros with standard VMA access flag combinations that are used frequently across many platforms. Apart from simplification, this reduces code duplication as well. Signed-off-by: Anshuman Khandual Signed-off-by: Andrew Morton Reviewed-by: Vlastimil Babka Acked-by: Geert Uytterhoeven Cc: Richard Henderson Cc: Vineet Gupta Cc: Russell King Cc: Catalin Marinas Cc: Mark Salter Cc: Guo Ren Cc: Yoshinori Sato Cc: Brian Cain Cc: Tony Luck Cc: Michal Simek Cc: Ralf Baechle Cc: Paul Burton Cc: Nick Hu Cc: Ley Foon Tan Cc: Jonas Bonn Cc: "James E.J. Bottomley" Cc: Michael Ellerman Cc: Paul Walmsley Cc: Heiko Carstens Cc: Rich Felker Cc: "David S. Miller" Cc: Guan Xuetao Cc: Thomas Gleixner Cc: Jeff Dike Cc: Chris Zankel Link: http://lkml.kernel.org/r/1583391014-8170-2-git-send-email-anshuman.khandual@arm.com Signed-off-by: Linus Torvalds

mm: hugetlb: optionally allocate gigantic hugepages using cma

2020-04-10T22:36:21Z

Commit 944d9fec8d7a ("hugetlb: add support for gigantic page allocation at runtime") has added the run-time allocation of gigantic pages. However it actually works only at early stages of the system loading, when the majority of memory is free. After some time the memory gets fragmented by non-movable pages, so the chances to find a contiguous 1GB block are getting close to zero. Even dropping caches manually doesn't help a lot. At large scale rebooting servers in order to allocate gigantic hugepages is quite expensive and complex. At the same time keeping some constant percentage of memory in reserved hugepages even if the workload isn't using it is a big waste: not all workloads can benefit from using 1 GB pages. The following solution can solve the problem: 1) On boot time a dedicated cma area* is reserved. The size is passed as a kernel argument. 2) Run-time allocations of gigantic hugepages are performed using the cma allocator and the dedicated cma area In this case gigantic hugepages can be allocated successfully with a high probability, however the memory isn't completely wasted if nobody is using 1GB hugepages: it can be used for pagecache, anon memory, THPs, etc. * On a multi-node machine a per-node cma area is allocated on each node. Following gigantic hugetlb allocation are using the first available numa node if the mask isn't specified by a user. Usage: 1) configure the kernel to allocate a cma area for hugetlb allocations: pass hugetlb_cma=10G as a kernel argument 2) allocate hugetlb pages as usual, e.g. echo 10 > /sys/kernel/mm/hugepages/hugepages-1048576kB/nr_hugepages If the option isn't enabled or the allocation of the cma area failed, the current behavior of the system is preserved. x86 and arm-64 are covered by this patch, other architectures can be trivially added later. The patch contains clean-ups and fixes proposed and implemented by Aslan Bakirov and Randy Dunlap. It also contains ideas and suggestions proposed by Rik van Riel, Michal Hocko and Mike Kravetz. Thanks! Signed-off-by: Roman Gushchin Signed-off-by: Andrew Morton Tested-by: Andreas Schaufler Acked-by: Mike Kravetz Acked-by: Michal Hocko Cc: Aslan Bakirov Cc: Randy Dunlap Cc: Rik van Riel Cc: Joonsoo Kim Link: http://lkml.kernel.org/r/20200407163840.92263-3-guro@fb.com Signed-off-by: Linus Torvalds

Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

2020-04-09T18:04:16Z

Pull arm64 fixes from Catalin Marinas: - Ensure that the compiler and linker versions are aligned so that ld doesn't complain about not understanding a .note.gnu.property section (emitted when pointer authentication is enabled). - Force -mbranch-protection=none when the feature is not enabled, in case a compiler may choose a different default value. - Remove CONFIG_DEBUG_ALIGN_RODATA. It was never in defconfig and rarely enabled. - Fix checking 16-bit Thumb-2 instructions checking mask in the emulation of the SETEND instruction (it could match the bottom half of a 32-bit Thumb-2 instruction). * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: armv8_deprecated: Fix undef_hook mask for thumb setend arm64: remove CONFIG_DEBUG_ALIGN_RODATA feature arm64: Always force a branch protection mode when the compiler has one arm64: Kconfig: ptrauth: Add binutils version check to fix mismatch init/kconfig: Add LD_VERSION Kconfig

Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

2020-04-08T17:51:53Z

Pull virtio updates from Michael Tsirkin: - Some bug fixes - The new vdpa subsystem with two first drivers * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: virtio-balloon: Revert "virtio-balloon: Switch back to OOM handler for VIRTIO_BALLOON_F_DEFLATE_ON_OOM" vdpa: move to drivers/vdpa virtio: Intel IFC VF driver for VDPA vdpasim: vDPA device simulator vhost: introduce vDPA-based backend virtio: introduce a vDPA based transport vDPA: introduce vDPA bus vringh: IOTLB support vhost: factor out IOTLB vhost: allow per device message handler vhost: refine vhost and vringh kconfig virtio-balloon: Switch back to OOM handler for VIRTIO_BALLOON_F_DEFLATE_ON_OOM virtio-net: Introduce hash report feature virtio-net: Introduce RSS receive steering feature virtio-net: Introduce extended RSC feature tools/virtio: option to build an out of tree module

arm64: armv8_deprecated: Fix undef_hook mask for thumb setend

2020-04-08T17:19:20Z

For thumb instructions, call_undef_hook() in traps.c first reads a u16, and if the u16 indicates a T32 instruction (u16 >= 0xe800), a second u16 is read, which then makes up the the lower half-word of a T32 instruction. For T16 instructions, the second u16 is not read, which makes the resulting u32 opcode always have the upper half set to 0. However, having the upper half of instr_mask in the undef_hook set to 0 masks out the upper half of all thumb instructions - both T16 and T32. This results in trapped T32 instructions with the lower half-word equal to the T16 encoding of setend (b650) being matched, even though the upper half-word is not 0000 and thus indicates a T32 opcode. An example of such a T32 instruction is eaa0b650, which should raise a SIGILL since T32 instructions with an eaa prefix are unallocated as per Arm ARM, but instead works as a SETEND because the second half-word is set to b650. This patch fixes the issue by extending instr_mask to include the upper u32 half, which will still match T16 instructions where the upper half is 0, but not T32 instructions. Fixes: 2d888f48e056 ("arm64: Emulate SETEND for AArch32 tasks") Cc: # 4.0.x- Reviewed-by: Suzuki K Poulose Signed-off-by: Fredrik Strupe Signed-off-by: Catalin Marinas

Merge tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random

2020-04-05T17:59:18Z

Pull /dev/random updates from Ted Ts'o: - Improve getrandom and /dev/random's support for those arm64 architecture variants that have RNG instructions. - Use batched output from CRNG instead of CPU's RNG instructions for better performance. - Miscellaneous bug fixes. * tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random: random: avoid warnings for !CONFIG_NUMA builds random: fix data races at timer_rand_state random: always use batched entropy for get_random_u{32,64} random: Make RANDOM_TRUST_CPU depend on ARCH_RANDOM arm64: add credited/trusted RNG support random: add arch_get_random_*long_early() random: split primary/secondary crng init paths

Merge tag 'arm-dt-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

2020-04-03T22:22:05Z

Pull ARM devicetree updates from Arnd Bergmann: "Most of the commits are for additional hardware support and minor fixes for existing machines for all the usual platforms: qcom, amlogic, at91, gemini, mediatek, ti, socfpga, i.mx, layerscape, uniphier, rockchip, exynos, ux500, mvebu, tegra, stm32, renesas, sunxi, broadcom, omap, and versatile. The conversion of binding files to machine-readable yaml format continues, along with fixes found during the validation. Andre Przywara takes over maintainership for the old Calxeda Highbank platform and provides a number of updates. The OMAP2+ platforms see a continued move from platform data into dts files, for many devices that relied on a mix of auxiliary data in addition to the DT description A moderate number of new SoCs and machines are added, here is a full list: - Two new Qualcomm SoCs with their evaluation boards: Snapdragon 865 (SM8250) is the current high-end phone chip, and IPQ6018 is a new WiFi-6 router chip. - Mediatek MT8516 application processor SoC for voice assistants, along with the "pumpkin" development board - NXP i.MX8M Plus SoC, a variant of the popular i.MX8M, along with an evaluation board. - Kontron "sl28" board family based on NXP LS1028A - Eleven variations of the new i.MX6 TechNexion Pico board, combining the "dwarf", "hobbit", "nymph" and "pi" baseboards with i.MX6/i.MX7 SoM carriers - Three additional variants of the Toradex Colibri board family, all based on versions of the NXP i.MX7. - The Pinebook Pro laptop based on Rockchip RK3399 - Samsung S7710 Galaxy Xcover 2, a 2013 vintage Android phone based on the ST-Ericsson u8500 platform - DH Electronics DHCOM SoM and PDK2 rev. 400 carrier based on STMicroelectronics stm32mp157 - Renesas M3ULCB starter kit for R-Car M3-W+ - Hoperun HiHope development board with Renesas RZ/G2M - Pine64 PineTab tablet and PinePhone phone, both based on Allwinner A64 - Linutronix Testbox v2 for the Lamobo R1 router, based on Allwinner A20 - PocketBook Touch Lux 3 ebook reader, based on Allwinner A13" * tag 'arm-dt-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (520 commits) ARM: dts: ux500: Fix missing node renames arm64: dts: Revert "specify console via command line" MAINTAINERS: Update Calxeda Highbank maintainership arm: dts: calxeda: Group port-phys and sgpio-gpio items arm: dts: calxeda: Fix interrupt grouping arm: dts: calxeda: Provide UART clock arm: dts: calxeda: Basic DT file fixes arm64: dts: specify console via command line ARM: dts: at91: sama5d27_wlsom1_ek: add USB device node ARM: dts: gemini: Add thermal zone to DIR-685 ARM: dts: gemini: Rename IDE nodes ARM: socfpga: arria10: Add ptp_ref clock to ethernet nodes arm64: dts: ti: k3-j721e-mcu: add scm node and phy-gmii-sel nodes arm64: dts: ti: k3-am65-mcu: add phy-gmii-sel node arm64: dts: ti: k3-am65-mcu: Add DMA entries for ADC arm64: dts: ti: k3-am65-main: Add DMA entries for main_spi0 arm64: dts: ti: k3-j721e-mcu-wakeup: Add DMA entries for ADC arm64: dts: ti: k3-am65: Add clocks to dwc3 nodes arm64: dts: meson-g12b-odroid-n2: add SPIFC controller node arm64: dts: khadas-vim3: add SPIFC controller node ...