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2018-11-18Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds2-10/+144
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Ingo Molnar: "Fix uncore PMU enumeration for CofeeLake CPUs" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/intel/uncore: Support CoffeeLake 8th CBOX perf/x86/intel/uncore: Add more IMC PCI IDs for KabyLake and CoffeeLake CPUs
2018-11-18Merge branch 'efi-urgent-for-linus' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull EFI fixes from Ingo Molnar: "Misc fixes: two warning splat fixes, a leak fix and persistent memory allocation fixes for ARM" * 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: efi: Permit calling efi_mem_reserve_persistent() from atomic context efi/arm: Defer persistent reservations until after paging_init() efi/arm/libstub: Pack FDT after populating it efi/arm: Revert deferred unmap of early memmap mapping efi: Fix debugobjects warning on 'efi_rts_work'
2018-11-18Merge branch 'spectre' of git://git.armlinux.org.uk/~rmk/linux-armLinus Torvalds7-47/+113
Pull ARM spectre updates from Russell King: "These are the currently known final bits that resolve the Spectre issues. big.Little systems used to be sufficiently identical in that there were no differences between individual CPUs in the system that mattered to the kernel. With the advent of the Spectre problem, the CPUs now have differences in how the workaround is applied. As a result of previous Spectre patches, these systems ended up reporting quite a lot of: "CPUx: Spectre v2: incorrect context switching function, system vulnerable" messages due to the action of the big.Little switcher causing the CPUs to be re-initialised regularly. This series resolves that issue by making the CPU vtable unique to each CPU. However, since this is used very early, before per-cpu is setup, per-cpu can't be used. We also have a problem that two of the methods are not called from preempt-safe paths, but thankfully these remain identical between all CPUs in the system. To make sure, we validate that these are identical during boot" * 'spectre' of git://git.armlinux.org.uk/~rmk/linux-arm: ARM: spectre-v2: per-CPU vtables to work around big.Little systems ARM: add PROC_VTABLE and PROC_TABLE macros ARM: clean up per-processor check_bugs method call ARM: split out processor lookup ARM: make lookup_processor_type() non-__init
2018-11-16Merge tag 'drm-fixes-2018-11-16' of git://anongit.freedesktop.org/drm/drmLinus Torvalds1-58/+53
Pull drm fixes from Dave Airlie: "Live from Vancouver, SoC maintainer talk, this weeks drm fixes pull for rc3: omapdrm: - regression fixes for the reordering bridge stuff that went into rc1 i915: - incorrect EU count fix - HPD storm fix - MST fix - relocation fix for gen4/5 amdgpu: - huge page handling fix - IH ring setup - XGMI aperture setup - watermark setup fix misc: - docs and MST fix" * tag 'drm-fixes-2018-11-16' of git://anongit.freedesktop.org/drm/drm: (23 commits) drm/i915: Account for scale factor when calculating initial phase drm/i915: Clean up skl_program_scaler() drm/i915: Move programming plane scaler to its own function. drm/i915/icl: Drop spurious register read from icl_dbuf_slices_update drm/i915: fix broadwell EU computation drm/amdgpu: fix huge page handling on Vega10 drm/amd/pp: Fix truncated clock value when set watermark drm/amdgpu: fix bug with IH ring setup drm/meson: venc: dmt mode must use encp drm/amdgpu: set system aperture to cover whole FB region drm/i915: Fix hpd handling for pins with two encoders drm/i915/execlists: Force write serialisation into context image vs execution drm/i915/icl: Fix power well 2 wrt. DC-off toggling order drm/i915: Fix NULL deref when re-enabling HPD IRQs on systems with MST drm/i915: Fix possible race in intel_dp_add_mst_connector() drm/i915/ringbuffer: Delay after EMIT_INVALIDATE for gen4/gen5 drm/omap: dsi: Fix missing of_platform_depopulate() drm/omap: Move DISPC runtime PM handling to omapdrm drm/omap: dsi: Ensure the device is active during probe drm/omap: hdmi4: Ensure the device is active during bind ...
2018-11-16Merge tag 'powerpc-4.20-3' of ↵Linus Torvalds11-103/+58
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixes from Michael Ellerman: "Two weeks worth of fixes since rc1. - I broke 16-byte alignment of the stack when we moved PPR into pt_regs. Despite being required by the ABI this broke almost nothing, we eventually hit it in code where GCC does arithmetic on the stack pointer assuming the bottom 4 bits are clear. Fix it by padding the in-kernel pt_regs by 8 bytes. - A couple of commits fixing minor bugs in the recent SLB rewrite. - A build fix related to tracepoints in KVM in some configurations. - Our old "IO workarounds" code written for Cell couldn't coexist in a kernel that runs on Power9 with the Radix MMU, fix that. - Remove the NPU DMA ops, these just printed a warning and should never have been called. - Suppress an overly chatty message triggered by CPU hotplug in some configs. - Two small selftest fixes. Thanks to: Alistair Popple, Gustavo Romero, Nicholas Piggin, Satheesh Rajendran, Scott Wood" * tag 'powerpc-4.20-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: selftests/powerpc: Adjust wild_bctr to build with old binutils powerpc/64: Fix kernel stack 16-byte alignment powerpc/numa: Suppress "VPHN is not supported" messages selftests/powerpc: Fix wild_bctr test to work on ppc64 powerpc/io: Fix the IO workarounds code to work with Radix powerpc/mm/64s: Fix preempt warning in slb_allocate_kernel() KVM: PPC: Move and undef TRACE_INCLUDE_PATH/FILE powerpc/mm/64s: Only use slbfee on CPUs that support it powerpc/mm/64s: Use PPC_SLBFEE macro powerpc/mm/64s: Consolidate SLB assertions powerpc/powernv/npu: Remove NPU DMA ops
2018-11-16Merge tag 'xtensa-20181115' of git://github.com/jcmvbkbc/linux-xtensaLinus Torvalds2-3/+10
Pull Xtensa fixes from Max Filippov: - fix stack alignment for bFLT binaries. - fix physical-to-virtual address translation for boot parameters in MMUv3 256+256 and 512+512 virtual memory layouts. * tag 'xtensa-20181115' of git://github.com/jcmvbkbc/linux-xtensa: xtensa: fix boot parameters address translation xtensa: make sure bFLT stack is 16 byte aligned
2018-11-16Merge tag 'drm-misc-fixes-2018-11-14' of ↵Dave Airlie1-58/+53
git://anongit.freedesktop.org/drm/drm-misc into drm-fixes Cross-subsystem: - omap: Instantiate dss children in omapdss instead of mach (Laurent) Other: - htmldocs build warning (Sean) - MST NULL deref fix (Stanislav) - omap: Various runtime ref gets on probe/bind (Laurent) - omap: Fix to the above dss children patch (Tony) Cc: Sean Paul <sean@poorly.run> Cc: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Tony Lindgren <tony@atomide.com> Signed-off-by: Dave Airlie <airlied@redhat.com> From: Sean Paul <sean@poorly.run> Link: https://patchwork.freedesktop.org/patch/msgid/20181114204542.GA52569@art_vandelay
2018-11-15efi/arm: Defer persistent reservations until after paging_init()Ard Biesheuvel1-0/+1
The new memory EFI reservation feature we introduced to allow memory reservations to persist across kexec may trigger an unbounded number of calls to memblock_reserve(). The memblock subsystem can deal with this fine, but not before memblock resizing is enabled, which we can only do after paging_init(), when the memory we reallocate the array into is actually mapped. So break out the memreserve table processing into a separate routine and call it after paging_init() on arm64. On ARM, because of limited reviewing bandwidth of the maintainer, we cannot currently fix this, so instead, disable the EFI persistent memreserve entirely on ARM so we can fix it later. Tested-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/20181114175544.12860-5-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-11-15powerpc/64: Fix kernel stack 16-byte alignmentNicholas Piggin2-0/+3
Commit 4c2de74cc869 ("powerpc/64: Interrupts save PPR on stack rather than thread_struct") changed sizeof(struct pt_regs) % 16 from 0 to 8, which causes the interrupt frame allocation on kernel entry to put the kernel stack out of alignment. Quadword (16-byte) alignment for the stack is required by both the 64-bit v1 ABI (v1.9 § 3.2.2) and the 64-bit v2 ABI (v1.1 § 2.2.2.1). Add a pad field to fix alignment, and add a BUILD_BUG_ON to catch this in future. Fixes: 4c2de74cc869 ("powerpc/64: Interrupts save PPR on stack rather than thread_struct") Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-11-14Merge tag 'riscv-for-linus-4.20-rc2' of ↵Linus Torvalds5-9/+14
git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux Pull RISC-V fixes from Palmer Dabbelt: "This contains a few patches that fix various issues in the RISC-V port: - enable printk timestamps in the RISC-V defconfig. - a whitespace fix to "struct pt_regs". - add a "vdso_install" target for RISC-V. - a pair of build fixes: one to fix a typo in our makefile, and one to clean up some warnings. There will probably be more patches from us for 4.20, but I don't have anything that's ready to go right now so I'm going to hold off a bit. Right now the only concrete thing I know I want to make sure gets sorted out is our 32-bit stat interface, which I don't want sitting in limbo for another cycle as we have to get RV32I glibc sone" * tag 'riscv-for-linus-4.20-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux: RISC-V: Silence some module warnings on 32-bit RISC-V: lib: Fix build error for 64-bit riscv: add missing vdso_install target riscv: fix spacing in struct pt_regs RISC-V: defconfig: Enable printk timestamps
2018-11-14Merge branch 'parisc-4.20-3' of ↵Linus Torvalds2-6/+10
git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux Pull parisc fix from Helge Deller: "Revert one patch which changed how spinlocks get released. It breaks the rwlock implementation in glibc" * 'parisc-4.20-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: Revert "Release spinlocks using ordered store"
2018-11-14Merge branch 'spectre' of git://git.armlinux.org.uk/~rmk/linux-armLinus Torvalds1-1/+1
Pull ARM fix from Russell King: "It was noticed that one of Julien's patches contained an error, this fixes that up" * 'spectre' of git://git.armlinux.org.uk/~rmk/linux-arm: ARM: 8810/1: vfp: Fix wrong assignement to ufp_exc
2018-11-14xtensa: fix boot parameters address translationMax Filippov1-2/+5
The bootloader may pass physical address of the boot parameters structure to the MMUv3 kernel in the register a2. Code in the _SetupMMU block in the arch/xtensa/kernel/head.S is supposed to map that physical address to the virtual address in the configured virtual memory layout. This code haven't been updated when additional 256+256 and 512+512 memory layouts were introduced and it may produce wrong addresses when used with these layouts. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-11-14powerpc/numa: Suppress "VPHN is not supported" messagesSatheesh Rajendran1-1/+1
When VPHN function is not supported and during cpu hotplug event, kernel prints message 'VPHN function not supported. Disabling polling...'. Currently it prints on every hotplug event, it floods dmesg when a KVM guest tries to hotplug huge number of vcpus, let's just print once and suppress further kernel prints. Signed-off-by: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-11-12RISC-V: Silence some module warnings on 32-bitOlof Johansson1-6/+6
Fixes: arch/riscv/kernel/module.c: In function 'apply_r_riscv_32_rela': ./include/linux/kern_levels.h:5:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'Elf32_Addr' {aka 'unsigned int'} [-Wformat=] arch/riscv/kernel/module.c:23:27: note: format string is defined here arch/riscv/kernel/module.c: In function 'apply_r_riscv_pcrel_hi20_rela': ./include/linux/kern_levels.h:5:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'Elf32_Addr' {aka 'unsigned int'} [-Wformat=] arch/riscv/kernel/module.c:104:23: note: format string is defined here arch/riscv/kernel/module.c: In function 'apply_r_riscv_hi20_rela': ./include/linux/kern_levels.h:5:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'Elf32_Addr' {aka 'unsigned int'} [-Wformat=] arch/riscv/kernel/module.c:146:23: note: format string is defined here arch/riscv/kernel/module.c: In function 'apply_r_riscv_got_hi20_rela': ./include/linux/kern_levels.h:5:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'Elf32_Addr' {aka 'unsigned int'} [-Wformat=] arch/riscv/kernel/module.c:190:60: note: format string is defined here arch/riscv/kernel/module.c: In function 'apply_r_riscv_call_plt_rela': ./include/linux/kern_levels.h:5:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'Elf32_Addr' {aka 'unsigned int'} [-Wformat=] arch/riscv/kernel/module.c:214:24: note: format string is defined here arch/riscv/kernel/module.c: In function 'apply_r_riscv_call_rela': ./include/linux/kern_levels.h:5:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'Elf32_Addr' {aka 'unsigned int'} [-Wformat=] arch/riscv/kernel/module.c:236:23: note: format string is defined here Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2018-11-12RISC-V: lib: Fix build error for 64-bitOlof Johansson1-1/+1
Fixes the following build error from tinyconfig: riscv64-unknown-linux-gnu-ld: kernel/sched/fair.o: in function `.L8': fair.c:(.text+0x70): undefined reference to `__lshrti3' riscv64-unknown-linux-gnu-ld: kernel/time/clocksource.o: in function `.L0 ': clocksource.c:(.text+0x334): undefined reference to `__lshrti3' Fixes: 7f47c73b355f ("RISC-V: Build tishift only on 64-bit") Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2018-11-12riscv: add missing vdso_install targetDavid Abdurachmanov1-0/+4
Building kernel 4.20 for Fedora as RPM fails, because riscv is missing vdso_install target in arch/riscv/Makefile. Signed-off-by: David Abdurachmanov <david.abdurachmanov@gmail.com> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2018-11-12riscv: fix spacing in struct pt_regsDavid Abdurachmanov1-2/+2
Replace 8 spaces with tab to match styling. Signed-off-by: David Abdurachmanov <david.abdurachmanov@gmail.com> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2018-11-12RISC-V: defconfig: Enable printk timestampsAnup Patel1-0/+1
The printk timestamps are very useful information to visually see where kernel is spending time during boot. It also helps us see the timing of hotplug events at runtime. This patch enables printk timestamps in RISC-V defconfig so that we have it enabled by default (similar to other architectures such as x86_64, arm64, etc). Signed-off-by: Anup Patel <anup@brainfault.org> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2018-11-12ARM: spectre-v2: per-CPU vtables to work around big.Little systemsRussell King4-15/+61
In big.Little systems, some CPUs require the Spectre workarounds in paths such as the context switch, but other CPUs do not. In order to handle these differences, we need per-CPU vtables. We are unable to use the kernel's per-CPU variables to support this as per-CPU is not initialised at times when we need access to the vtables, so we have to use an array indexed by logical CPU number. We use an array-of-pointers to avoid having function pointers in the kernel's read/write .data section. Reviewed-by: Julien Thierry <julien.thierry@arm.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2018-11-12ARM: 8810/1: vfp: Fix wrong assignement to ufp_excJulien Thierry1-1/+1
In vfp_preserve_user_clear_hwstate, ufp_exc->fpinst2 gets assigned to itself. It should actually be hwstate->fpinst2 that gets assigned to the ufp_exc field. Fixes commit 3aa2df6ec2ca6bc143a65351cca4266d03a8bc41 ("ARM: 8791/1: vfp: use __copy_to_user() when saving VFP state"). Reported-by: David Binderman <dcb314@hotmail.com> Signed-off-by: Julien Thierry <julien.thierry@arm.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2018-11-12ARM: add PROC_VTABLE and PROC_TABLE macrosRussell King2-16/+27
Allow the way we access members of the processor vtable to be changed at compile time. We will need to move to per-CPU vtables to fix the Spectre variant 2 issues on big.Little systems. However, we have a couple of calls that do not need the vtable treatment, and indeed cause a kernel warning due to the (later) use of smp_processor_id(), so also introduce the PROC_TABLE macro for these which always use CPU 0's function pointers. Reviewed-by: Julien Thierry <julien.thierry@arm.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2018-11-12ARM: clean up per-processor check_bugs method callRussell King2-2/+3
Call the per-processor type check_bugs() method in the same way as we do other per-processor functions - move the "processor." detail into proc-fns.h. Reviewed-by: Julien Thierry <julien.thierry@arm.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2018-11-12ARM: split out processor lookupRussell King2-12/+20
Split out the lookup of the processor type and associated error handling from the rest of setup_processor() - we will need to use this in the secondary CPU bringup path for big.Little Spectre variant 2 mitigation. Reviewed-by: Julien Thierry <julien.thierry@arm.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2018-11-12ARM: make lookup_processor_type() non-__initRussell King1-3/+3
Move lookup_processor_type() out of the __init section so it is callable from (eg) the secondary startup code during hotplug. Reviewed-by: Julien Thierry <julien.thierry@arm.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2018-11-12drm/omap: Populate DSS children in omapdss driverLaurent Pinchart1-58/+53
The DSS DT node contains children that describe the DSS components (DISPC and internal encoders). Each of those components is handled by a platform driver, and thus needs to be backed by a platform device. The corresponding platform devices are created in mach-omap2 code by a call to of_platform_populate(). While this approach has worked so far, it doesn't model the hardware architecture very well, as it creates child devices before the parent is ready to handle them. This would be akin to creating I2C slaves before the I2C master is available. The task can be easily performed in the omapdss driver code instead, simplifying mach-omap2 code. We however can't remove the mach-omap2 code completely as the omap2fb driver still depends on it, but we can move it to the omap2fb-specific section, where it can stay until the omap2fb driver gets removed. This has the added benefit of not allowing DSS components to probe before the DSS itself, which led to runtime PM issues when the DSS probe is deferred. Fixes: 27d624527d99 ("drm/omap: dss: Acquire next dssdev at probe time") Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Tony Lindgren <tony@atomide.com> Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com> Link: https://patchwork.freedesktop.org/patch/msgid/20181110111654.4387-2-laurent.pinchart@ideasonboard.com
2018-11-12perf/x86/intel/uncore: Support CoffeeLake 8th CBOXKan Liang2-9/+30
Coffee Lake has 8 core products which has 8 Cboxes. The 8th CBOX is mapped into different MSR space. Increase the num_boxes to 8 to handle the new products. It will not impact the previous platforms, SkyLake, KabyLake and earlier CoffeeLake. Because the num_boxes will be recalculated in uncore_cpu_init and doesn't exceed the x86_max_cores. Introduce a new box flag bit to indicate the 8th CBOX. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Link: http://lkml.kernel.org/r/20181019170419.378-2-kan.liang@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-11-12perf/x86/intel/uncore: Add more IMC PCI IDs for KabyLake and CoffeeLake CPUsKan Liang1-1/+114
KabyLake and CoffeeLake CPUs have the same client uncore events as SkyLake. Add the PCI IDs for the KabyLake Y, U, S processor lines and CoffeeLake U, H, S processor lines. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Link: http://lkml.kernel.org/r/20181019170419.378-1-kan.liang@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-11-12powerpc/io: Fix the IO workarounds code to work with RadixMichael Ellerman1-13/+7
Back in 2006 Ben added some workarounds for a misbehaviour in the Spider IO bridge used on early Cell machines, see commit 014da7ff47b5 ("[POWERPC] Cell "Spider" MMIO workarounds"). Later these were made to be generic, ie. not tied specifically to Spider. The code stashes a token in the high bits (59-48) of virtual addresses used for IO (eg. returned from ioremap()). This works fine when using the Hash MMU, but when we're using the Radix MMU the bits used for the token overlap with some of the bits of the virtual address. This is because the maximum virtual address is larger with Radix, up to c00fffffffffffff, and in fact we use that high part of the address range for ioremap(), see RADIX_KERN_IO_START. As it happens the bits that are used overlap with the bits that differentiate an IO address vs a linear map address. If the resulting address lies outside the linear mapping we will crash (see below), if not we just corrupt memory. virtio-pci 0000:00:00.0: Using 64-bit direct DMA at offset 800000000000000 Unable to handle kernel paging request for data at address 0xc000000080000014 ... CFAR: c000000000626b98 DAR: c000000080000014 DSISR: 42000000 IRQMASK: 0 GPR00: c0000000006c54fc c00000003e523378 c0000000016de600 0000000000000000 GPR04: c00c000080000014 0000000000000007 0fffffff000affff 0000000000000030 ^^^^ ... NIP [c000000000626c5c] .iowrite8+0xec/0x100 LR [c0000000006c992c] .vp_reset+0x2c/0x90 Call Trace: .pci_bus_read_config_dword+0xc4/0x120 (unreliable) .register_virtio_device+0x13c/0x1c0 .virtio_pci_probe+0x148/0x1f0 .local_pci_probe+0x68/0x140 .pci_device_probe+0x164/0x220 .really_probe+0x274/0x3b0 .driver_probe_device+0x80/0x170 .__driver_attach+0x14c/0x150 .bus_for_each_dev+0xb8/0x130 .driver_attach+0x34/0x50 .bus_add_driver+0x178/0x2f0 .driver_register+0x90/0x1a0 .__pci_register_driver+0x6c/0x90 .virtio_pci_driver_init+0x2c/0x40 .do_one_initcall+0x64/0x280 .kernel_init_freeable+0x36c/0x474 .kernel_init+0x24/0x160 .ret_from_kernel_thread+0x58/0x7c This hasn't been a problem because CONFIG_PPC_IO_WORKAROUNDS which enables this code is usually not enabled. It is only enabled when it's selected by PPC_CELL_NATIVE which is only selected by PPC_IBM_CELL_BLADE and that in turn depends on BIG_ENDIAN. So in order to hit the bug you need to build a big endian kernel, with IBM Cell Blade support enabled, as well as Radix MMU support, and then boot that on Power9 using Radix MMU. Still we can fix the bug, so let's do that. We simply use fewer bits for the token, taking the union of the restrictions on the address from both Hash and Radix, we end up with 8 bits we can use for the token. The only user of the token is iowa_mem_find_bus() which only supports 8 token values, so 8 bits is plenty for that. Fixes: 566ca99af026 ("powerpc/mm/radix: Add dummy radix_enabled()") Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-11-12powerpc/mm/64s: Fix preempt warning in slb_allocate_kernel()Michael Ellerman1-1/+1
With preempt enabled we see warnings in do_slb_fault(): BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u33:0/98 futex hash table entries: 4096 (order: 3, 524288 bytes) caller is do_slb_fault+0x204/0x230 CPU: 5 PID: 98 Comm: kworker/u33:0 Not tainted 4.19.0-rc3-gcc-7.3.1-00022-g1936f094e164 #138 Call Trace: dump_stack+0xb4/0x104 (unreliable) check_preemption_disabled+0x148/0x150 do_slb_fault+0x204/0x230 data_access_slb_common+0x138/0x180 This is caused by the get_paca() in slb_allocate_kernel(), which includes a call to debug_smp_processor_id(). slb_allocate_kernel() can only be called from do_slb_fault(), and in that path interrupts are hard disabled and so we can't be preempted, but we can't update the preempt flags (in thread_info) because that could cause an SLB fault. So just use local_paca which is safe and doesn't cause the warning. Fixes: 48e7b7695745 ("powerpc/64s/hash: Convert SLB miss handlers to C") Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-11-11Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds12-117/+76
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Thomas Gleixner: "A set of x86 fixes: - Cure the LDT remapping to user space on 5 level paging which ended up in the KASLR space - Remove LDT mapping before freeing the LDT pages - Make NFIT MCE handling more robust - Unbreak the VSMP build by removing the dependency on paravirt ops - Support broken PIT emulation on Microsoft hyperV - Don't trace vmware_sched_clock() to avoid tracer recursion - Remove -pipe from KBUILD CFLAGS which breaks clang and is also slower on GCC - Trivial coding style and typo fixes" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/cpu/vmware: Do not trace vmware_sched_clock() x86/vsmp: Remove dependency on pv_irq_ops x86/ldt: Remove unused variable in map_ldt_struct() x86/ldt: Unmap PTEs for the slot before freeing LDT pages x86/mm: Move LDT remap out of KASLR region on 5-level paging acpi/nfit, x86/mce: Validate a MCE's address before using it acpi/nfit, x86/mce: Handle only uncorrectable machine checks x86/build: Remove -pipe from KBUILD_CFLAGS x86/hyper-v: Fix indentation in hv_do_fast_hypercall16() Documentation/x86: Fix typo in zero-page.txt x86/hyper-v: Enable PIT shutdown quirk clockevents/drivers/i8253: Add support for PIT shutdown quirk
2018-11-11Merge branch 'locking-urgent-for-linus' of ↵Linus Torvalds1-5/+8
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking build fix from Thomas Gleixner: "A single fix for a build fail with CONFIG_PROFILE_ALL_BRANCHES=y in the qspinlock code" * 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/qspinlock: Fix compile error
2018-11-10Merge tag 'tty-4.20-rc2' of ↵Linus Torvalds3-1/+29
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial fixes from Greg KH: "Here are some small tty fixes for 4.20-rc2 One of these missed the original 4.19-final release, I missed that I hadn't done a pull request for it as it was in linux-next and my branch for a long time, that's my fault. The others are small, fixing some reported issues and finally fixing the termios mess for alpha so that glibc has a chance to implement some missing functionality that has been pending for many years now. All of these have been in linux-next with no reported issues" * tag 'tty-4.20-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: serial: sh-sci: Fix could not remove dev_attr_rx_fifo_timeout arch/alpha, termios: implement BOTHER, IBSHIFT and termios2 termios, tty/tty_baudrate.c: fix buffer overrun vt: fix broken display when running aptitude serial: sh-sci: Fix receive on SCIFA/SCIFB variants with DMA
2018-11-10Merge tag 'for-linus-4.20a-rc2-tag' of ↵Linus Torvalds3-12/+40
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull xen fixes from Juergen Gross: "Several fixes, mostly for rather recent regressions when running under Xen" * tag 'for-linus-4.20a-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen: remove size limit of privcmd-buf mapping interface xen: fix xen_qlock_wait() x86/xen: fix pv boot xen-blkfront: fix kernel panic with negotiate_mq error path xen/grant-table: Fix incorrect gnttab_dma_free_pages() pr_debug message CONFIG_XEN_PV breaks xen_create_contiguous_region on ARM
2018-11-10Merge tag 'arm64-fixes' of ↵Linus Torvalds3-2/+10
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Catalin Marinas: - Fix occasional page fault during boot due to memblock resizing before the linear map is up. - Define NET_IP_ALIGN to 0 to improve the DMA performance on some platforms. - lib/raid6 test build fix. - .mailmap update for Punit Agrawal * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: memblock: don't permit memblock resizing until linear mapping is up arm64: mm: define NET_IP_ALIGN to 0 lib/raid6: Fix arm64 test build mailmap: Update email for Punit Agrawal
2018-11-09Merge tag 'for-linus-20181109' of git://git.kernel.dk/linux-blockLinus Torvalds1-4/+8
Pull block layer fixes from Jens Axboe: - Two fixes for an ubd regression, one for missing locking, and one for a missing initialization of a field. The latter was an old latent bug, but it's now visible and triggers (Me, Anton Ivanov) - Set of NVMe fixes via Christoph, but applied manually due to a git tree mixup (Christoph, Sagi) - Fix for a discard split regression, in three patches (Ming) - Update libata git trees (Geert) - SPDX identifier for sata_rcar (Kuninori Morimoto) - Virtual boundary merge fix (Johannes) - Preemptively clear memory we are going to pass to userspace, in case the driver does a short read (Keith) * tag 'for-linus-20181109' of git://git.kernel.dk/linux-block: block: make sure writesame bio is aligned with logical block size block: cleanup __blkdev_issue_discard() block: make sure discard bio is aligned with logical block size Revert "nvmet-rdma: use a private workqueue for delete" nvme: make sure ns head inherits underlying device limits nvmet: don't try to add ns to p2p map unless it actually uses it sata_rcar: convert to SPDX identifiers ubd: fix missing initialization of io_req block: Clear kernel memory before copying to user MAINTAINERS: Fix remaining pointers to obsolete libata.git ubd: fix missing lock around request issue block: respect virtual boundary mask in bvecs
2018-11-09Merge tag 'mips_fixes_4.20_2' of ↵Linus Torvalds2-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux Pull MIPS fixes from Paul Burton: "A couple of small MIPS fixes for 4.20: - Extend an array to avoid overruns on some Octeon hardware, fixing a bug introduced in 4.3. - Fix a coherent DMA regression for systems without cache-coherent DMA introduced in the 4.20 merge window" * tag 'mips_fixes_4.20_2' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: MIPS: Fix `dma_alloc_coherent' returning a non-coherent allocation MIPS: OCTEON: fix out of bounds array access on CN68XX
2018-11-09x86/cpu/vmware: Do not trace vmware_sched_clock()Steven Rostedt (VMware)1-1/+1
When running function tracing on a Linux guest running on VMware Workstation, the guest would crash. This is due to tracing of the sched_clock internal call of the VMware vmware_sched_clock(), which causes an infinite recursion within the tracing code (clock calls must not be traced). Make vmware_sched_clock() not traced by ftrace. Fixes: 80e9a4f21fd7c ("x86/vmware: Add paravirt sched clock") Reported-by: GwanYeong Kim <gy741.kim@gmail.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Borislav Petkov <bp@suse.de> CC: Alok Kataria <akataria@vmware.com> CC: GwanYeong Kim <gy741.kim@gmail.com> CC: "H. Peter Anvin" <hpa@zytor.com> CC: Ingo Molnar <mingo@kernel.org> Cc: stable@vger.kernel.org CC: Thomas Gleixner <tglx@linutronix.de> CC: virtualization@lists.linux-foundation.org CC: x86-ml <x86@kernel.org> Link: http://lkml.kernel.org/r/20181109152207.4d3e7d70@gandalf.local.home
2018-11-09xen: fix xen_qlock_wait()Juergen Gross1-6/+8
Commit a856531951dc80 ("xen: make xen_qlock_wait() nestable") introduced a regression for Xen guests running fully virtualized (HVM or PVH mode). The Xen hypervisor wouldn't return from the poll hypercall with interrupts disabled in case of an interrupt (for PV guests it does). So instead of disabling interrupts in xen_qlock_wait() use a nesting counter to avoid calling xen_clear_irq_pending() in case xen_qlock_wait() is nested. Fixes: a856531951dc80 ("xen: make xen_qlock_wait() nestable") Cc: stable@vger.kernel.org Reported-by: Sander Eikelenboom <linux@eikelenboom.it> Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Tested-by: Sander Eikelenboom <linux@eikelenboom.it> Signed-off-by: Juergen Gross <jgross@suse.com>
2018-11-09Merge tag 's390-4.20-2' of ↵Linus Torvalds23-87/+145
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 fixes from Martin Schwidefsky: - A fix for the pgtable_bytes misaccounting on s390. The patch changes common code part in regard to page table folding and adds extra checks to mm_[inc|dec]_nr_[pmds|puds]. - Add FORCE for all build targets using if_changed - Use non-loadable phdr for the .vmlinux.info section to avoid a segment overlap that confuses kexec - Cleanup the attribute definition for the diagnostic sampling - Increase stack size for CONFIG_KASAN=y builds - Export __node_distance to fix a build error - Correct return code of a PMU event init function - An update for the default configs * tag 's390-4.20-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/perf: Change CPUM_CF return code in event init function s390: update defconfigs s390/mm: Fix ERROR: "__node_distance" undefined! s390/kasan: increase instrumented stack size to 64k s390/cpum_sf: Rework attribute definition for diagnostic sampling s390/mm: fix mis-accounting of pgtable_bytes mm: add mm_pxd_folded checks to pgtable_bytes accounting functions mm: introduce mm_[p4d|pud|pmd]_folded mm: make the __PAGETABLE_PxD_FOLDED defines non-empty s390: avoid vmlinux segments overlap s390/vdso: add missing FORCE to build targets s390/decompressor: add missing FORCE to build targets
2018-11-09x86/xen: fix pv bootJuergen Gross2-6/+32
Commit 9da3f2b7405440 ("x86/fault: BUG() when uaccess helpers fault on kernel addresses") introduced a regression for booting Xen PV guests. Xen PV guests are using __put_user() and __get_user() for accessing the p2m map (physical to machine frame number map) as accesses might fail in case of not populated areas of the map. With above commit using __put_user() and __get_user() for accessing kernel pages is no longer valid. So replace the Xen hack by adding appropriate p2m access functions using the default fixup handler. Fixes: 9da3f2b7405440 ("x86/fault: BUG() when uaccess helpers fault on kernel addresses") Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2018-11-08arm64: memblock: don't permit memblock resizing until linear mapping is upArd Biesheuvel2-2/+2
Bhupesh reports that having numerous memblock reservations at early boot may result in the following crash: Unable to handle kernel paging request at virtual address ffff80003ffe0000 ... Call trace: __memcpy+0x110/0x180 memblock_add_range+0x134/0x2e8 memblock_reserve+0x70/0xb8 memblock_alloc_base_nid+0x6c/0x88 __memblock_alloc_base+0x3c/0x4c memblock_alloc_base+0x28/0x4c memblock_alloc+0x2c/0x38 early_pgtable_alloc+0x20/0xb0 paging_init+0x28/0x7f8 This is caused by the fact that we permit memblock resizing before the linear mapping is up, and so the memblock_reserved() array is moved into memory that is not mapped yet. So let's ensure that this crash can no longer occur, by deferring to call to memblock_allow_resize() to after the linear mapping has been created. Reported-by: Bhupesh Sharma <bhsharma@redhat.com> Acked-by: Will Deacon <will.deacon@arm.com> Tested-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2018-11-08arm64: mm: define NET_IP_ALIGN to 0Ard Biesheuvel1-0/+8
On arm64, there is no need to add 2 bytes of padding to the start of each network buffer just to make the IP header appear 32-bit aligned. Since this might actually adversely affect DMA performance some platforms, let's override NET_IP_ALIGN to 0 to get rid of this padding. Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Tested-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Acked-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2018-11-08ubd: fix missing initialization of io_reqAnton Ivanov1-2/+1
The SYNC path doesn't initialize io_req->error, which can cause random errors. Before the conversion to blk-mq, we always completed requests with BLK_STS_OK status, but now we actually look at the error field and this issue becomes apparent. Signed-off-by: Anton Ivanov <anton.ivanov@cambridgegreys.com> [axboe: fixed up commit message to explain what is actually going on] Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-11-08arch/alpha, termios: implement BOTHER, IBSHIFT and termios2H. Peter Anvin (Intel)3-1/+29
Alpha has had c_ispeed and c_ospeed, but still set speeds in c_cflags using arbitrary flags. Because BOTHER is not defined, the general Linux code doesn't allow setting arbitrary baud rates, and because CBAUDEX == 0, we can have an array overrun of the baud_rate[] table in drivers/tty/tty_baudrate.c if (c_cflags & CBAUD) == 037. Resolve both problems by #defining BOTHER to 037 on Alpha. However, userspace still needs to know if setting BOTHER is actually safe given legacy kernels (does anyone actually care about that on Alpha anymore?), so enable the TCGETS2/TCSETS*2 ioctls on Alpha, even though they use the same structure. Define struct termios2 just for compatibility; it is the exact same structure as struct termios. In a future patchset, this will be cleaned up so the uapi headers are usable from libc. Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com> Cc: Jiri Slaby <jslaby@suse.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Cc: Eugene Syromiatnikov <esyr@redhat.com> Cc: <linux-alpha@vger.kernel.org> Cc: <linux-serial@vger.kernel.org> Cc: Johan Hovold <johan@kernel.org> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-08s390/perf: Change CPUM_CF return code in event init functionThomas Richter1-1/+1
The function perf_init_event() creates a new event and assignes it to a PMU. This a done in a loop over all existing PMUs. For each listed PMU the event init function is called and if this function does return any other error than -ENOENT, the loop is terminated the creation of the event fails. If the event is invalid, return -ENOENT to try other PMUs. Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-11-07ubd: fix missing lock around request issueJens Axboe1-2/+7
We need to hold the device lock (and disable interrupts) while writing new commands, or we could be interrupted while that is happening and read invalid requests in the completion path. Fixes: 4e6da0fe8058 ("um: Convert ubd driver to blk-mq") Tested-by: Richard Weinberger <richard@nod.at> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-11-07Merge tag 'armsoc-fixes' of ↵Linus Torvalds8-30/+38
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC fixes from Olof Johansson: "A few more fixes that have come in, and one revert of a previous fix. I was a bit too trigger happy to enable PREEMPT on multi_v7_defconfig, and it ended up regressing at least BeagleBone XM boards. While we get that debugged for next merge window, let's disable it again. Beyond that: - Stratix change to fix multicast filtering - Minor DT fixes for Renesas and i.MX - Ethernet fix for a Renesas board (switching main interfaces) - Ethernet phy regulator fix for i.MX6SX" * tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: arm64: dts: stratix10: fix multicast filtering ARM: defconfig: Disable PREEMPT again on multi_v7 arm64: dts: renesas: condor: switch from EtherAVB to GEther dt-bindings: arm: Fix RZ/G2E part number arm64: dts: renesas: r8a7795: add missing dma-names on hscif2 ARM: dts: imx6sx-sdb: Fix enet phy regulator ARM: dts: fsl: Fix improperly quoted stdout-path values ARM: dts: imx6sll: fix typo for fsl,imx6sll-i2c node
2018-11-07Merge tag 'stratix10_dts_fix_for_v4.20' of ↵Olof Johansson1-0/+3
git://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux into fixes ARM: dts: stratix10: fix multicast filtering On Stratix 10, the EMAC has 256 hash buckets for multicast filtering. This needs to be specified in DTS, otherwise the stmmac driver defaults to 64 buckets and initializes the filter incorrectly. As a result, e.g. valid IPv6 multicast traffic ends up being dropped. * tag 'stratix10_dts_fix_for_v4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux: arm64: dts: stratix10: fix multicast filtering Signed-off-by: Olof Johansson <olof@lixom.net>
2018-11-07Merge tag 'renesas-fixes-for-v4.20' of ↵Olof Johansson2-24/+25
https://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into fixes Renesas ARM Based SoC Fixes for v4.20 * R-Car V3H (r8a77980) based Condor board - Switch from EtherAVB to GEther to match offical boards * RZ/G2E (ra8774c0) SoC: correct documentation of part number * R-Car H3 (r8a7795) SoC: reinstate all DMA channels on HSCIF2 * tag 'renesas-fixes-for-v4.20' of https://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas: arm64: dts: renesas: condor: switch from EtherAVB to GEther dt-bindings: arm: Fix RZ/G2E part number arm64: dts: renesas: r8a7795: add missing dma-names on hscif2 Signed-off-by: Olof Johansson <olof@lixom.net>
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 02:56:42 +0000