linux/arch/arm/include/uapi, branch v4.9

ARM: wire up new pkey syscalls

2016-10-19T09:18:47Z

Wire up the new pkey syscalls for ARM. Signed-off-by: Russell King

ARM: KVM: Support vgic-v3

2016-09-22T11:22:21Z

This patch allows to build and use vgic-v3 in 32-bit mode. Unfortunately, it can not be split in several steps without extra stubs to keep patches independent and bisectable. For instance, virt/kvm/arm/vgic/vgic-v3.c uses function from vgic-v3-sr.c, handling access to GICv3 cpu interface from the guest requires vgic_v3.vgic_sre to be already defined. It is how support has been done: * handle SGI requests from the guest * report configured SRE on access to GICv3 cpu interface from the guest * required vgic-v3 macros are provided via uapi.h * static keys are used to select GIC backend * to make vgic-v3 build KVM_ARM_VGIC_V3 guard is removed along with the static inlines Acked-by: Marc Zyngier Reviewed-by: Christoffer Dall Signed-off-by: Vladimir Murzin Signed-off-by: Christoffer Dall

kvm arm/arm64: Remove trailing whitespace from headers

2016-07-12T18:20:36Z

Noticed while making a copy of these files to tools/ where those kernel files were being directly accessed, which we're not allowing anymore to avoid that changes in the kernel side break tooling. Cc: Christoffer Dall Cc: Eric Auger Cc: Marc Zyngier Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-82thftcdhj2j5wt6ir4vuyhk@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

ARM: wire up preadv2 and pwritev2 syscalls

2016-04-07T20:57:02Z

Wire up the preadv2 and pwritev2 syscalls for ARM. Signed-off-by: Russell King

ARM: wire up copy_file_range() syscall

2016-01-27T18:14:46Z

Add the copy_file_range() syscall to ARM. Signed-off-by: Russell King

ARM: wire up mlock2 syscall

2015-11-18T11:20:24Z

Signed-off-by: Russell King

ARM: wire up new syscalls

2015-09-22T07:13:42Z

Wire up the new userfaultfd and membarrier syscalls for ARM. Signed-off-by: Russell King

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2015-04-26T20:06:22Z

Pull second batch of KVM changes from Paolo Bonzini: "This mostly includes the PPC changes for 4.1, which this time cover Book3S HV only (debugging aids, minor performance improvements and some cleanups). But there are also bug fixes and small cleanups for ARM, x86 and s390. The task_migration_notifier revert and real fix is still pending review, but I'll send it as soon as possible after -rc1" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (29 commits) KVM: arm/arm64: check IRQ number on userland injection KVM: arm: irqfd: fix value returned by kvm_irq_map_gsi KVM: VMX: Preserve host CR4.MCE value while in guest mode. KVM: PPC: Book3S HV: Use msgsnd for signalling threads on POWER8 KVM: PPC: Book3S HV: Translate kvmhv_commence_exit to C KVM: PPC: Book3S HV: Streamline guest entry and exit KVM: PPC: Book3S HV: Use bitmap of active threads rather than count KVM: PPC: Book3S HV: Use decrementer to wake napping threads KVM: PPC: Book3S HV: Don't wake thread with no vcpu on guest IPI KVM: PPC: Book3S HV: Get rid of vcore nap_count and n_woken KVM: PPC: Book3S HV: Move vcore preemption point up into kvmppc_run_vcpu KVM: PPC: Book3S HV: Minor cleanups KVM: PPC: Book3S HV: Simplify handling of VCPUs that need a VPA update KVM: PPC: Book3S HV: Accumulate timing information for real-mode code KVM: PPC: Book3S HV: Create debugfs file for each guest's HPT KVM: PPC: Book3S HV: Add ICP real mode counters KVM: PPC: Book3S HV: Move virtual mode ICP functions to real-mode KVM: PPC: Book3S HV: Convert ICS mutex lock to spin lock KVM: PPC: Book3S HV: Add guest->host real mode completion counters KVM: PPC: Book3S HV: Add helpers for lock/unlock hpte ...

KVM: arm/arm64: check IRQ number on userland injection

2015-04-22T14:42:24Z

When userland injects a SPI via the KVM_IRQ_LINE ioctl we currently only check it against a fixed limit, which historically is set to 127. With the new dynamic IRQ allocation the effective limit may actually be smaller (64). So when now a malicious or buggy userland injects a SPI in that range, we spill over on our VGIC bitmaps and bytemaps memory. I could trigger a host kernel NULL pointer dereference with current mainline by injecting some bogus IRQ number from a hacked kvmtool: ----------------- .... DEBUG: kvm_vgic_inject_irq(kvm, cpu=0, irq=114, level=1) DEBUG: vgic_update_irq_pending(kvm, cpu=0, irq=114, level=1) DEBUG: IRQ #114 still in the game, writing to bytemap now... Unable to handle kernel NULL pointer dereference at virtual address 00000000 pgd = ffffffc07652e000 [00000000] *pgd=00000000f658b003, *pud=00000000f658b003, *pmd=0000000000000000 Internal error: Oops: 96000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 1053 Comm: lkvm-msi-irqinj Not tainted 4.0.0-rc7+ #3027 Hardware name: FVP Base (DT) task: ffffffc0774e9680 ti: ffffffc0765a8000 task.ti: ffffffc0765a8000 PC is at kvm_vgic_inject_irq+0x234/0x310 LR is at kvm_vgic_inject_irq+0x30c/0x310 pc : [] lr : [] pstate: 80000145 ..... So this patch fixes this by checking the SPI number against the actual limit. Also we remove the former legacy hard limit of 127 in the ioctl code. Signed-off-by: Andre Przywara Reviewed-by: Christoffer Dall CC: # 4.0, 3.19, 3.18 [maz: wrap KVM_ARM_IRQ_GIC_MAX with #ifndef __KERNEL__, as suggested by Christopher Covington] Signed-off-by: Marc Zyngier

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

2015-04-15T04:03:26Z

Pull ARM updates from Russell King: "Included in this update are both some long term fixes and some new features. Fixes: - An integer overflow in the calculation of ELF_ET_DYN_BASE. - Avoiding OOMs for high-order IOMMU allocations - SMP requires the data cache to be enabled for synchronisation primitives to work, so prevent the CPU_DCACHE_DISABLE option being visible on SMP builds. - A bug going back 10+ years in the noMMU ARM94* CPU support code, where it corrupts registers. Found by folk getting Linux running on their cameras. - Versatile Express needs an errata workaround enabled for CPU hot-unplug to work. Features: - Clean up module linker by handling out of range relocations separately from relocation cases we don't handle. - Fix a long term bug in the pci_mmap_page_range() code, which we hope won't impact userspace (we hope there's no users of the existing broken interface.) - Don't map DMA coherent allocations when we don't have a MMU. - Drop experimental status for SMP_ON_UP. - Warn when DT doesn't specify ePAPR mandatory cache properties. - Add documentation concerning how we find the start of physical memory for AUTO_ZRELADDR kernels, detailing why we have chosen the mask and the implications of changing it. - Updates from Ard Biesheuvel to address some issues with large kernels (such as allyesconfig) failing to link. - Allow hibernation to work on modern (ARMv7) CPUs - this appears to have never worked in the past on these CPUs. - Enable IRQ_SHOW_LEVEL, which changes the /proc/interrupts output format (hopefully without userspace breaking... let's hope that if it causes someone a problem, they tell us.) - Fix tegra-ahb DT offsets. - Rework ARM errata 643719 code (and ARMv7 flush_cache_louis()/ flush_dcache_all()) code to be more efficient, and enable this errata workaround by default for ARMv7+SMP CPUs. This complements the Versatile Express fix above. - Rework ARMv7 context code for errata 430973, so that only Cortex A8 CPUs are impacted by the branch target buffer flush when this errata is enabled. Also update the help text to indicate that all r1p* A8 CPUs are impacted. - Switch ARM to the generic show_mem() implementation, it conveys all the information which we were already reporting. - Prevent slow timer sources being used for udelay() - timers running at less than 1MHz are not useful for this, and can cause udelay() to return immediately, without any wait. Using such a slow timer is silly. - VDSO support for 32-bit ARM, mainly for gettimeofday() using the ARM architected timer. - Perf support for Scorpion performance monitoring units" vdso semantic conflict fixed up as per linux-next. * 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: (52 commits) ARM: update errata 430973 documentation to cover Cortex A8 r1p* ARM: ensure delay timer has sufficient accuracy for delays ARM: switch to use the generic show_mem() implementation ARM: proc-v7: avoid errata 430973 workaround for non-Cortex A8 CPUs ARM: enable ARM errata 643719 workaround by default ARM: cache-v7: optimise test for Cortex A9 r0pX devices ARM: cache-v7: optimise branches in v7_flush_cache_louis ARM: cache-v7: consolidate initialisation of cache level index ARM: cache-v7: shift CLIDR to extract appropriate field before masking ARM: cache-v7: use movw/movt instructions ARM: allow 16-bit instructions in ALT_UP() ARM: proc-arm94*.S: fix setup function ARM: vexpress: fix CPU hotplug with CT9x4 tile. ARM: 8276/1: Make CPU_DCACHE_DISABLE depend on !SMP ARM: 8335/1: Documentation: DT bindings: Tegra AHB: document the legacy base address ARM: 8334/1: amba: tegra-ahb: detect and correct bogus base address ARM: 8333/1: amba: tegra-ahb: fix register offsets in the macros ARM: 8339/1: Enable CONFIG_GENERIC_IRQ_SHOW_LEVEL ARM: 8338/1: kexec: Relax SMP validation to improve DT compatibility ARM: 8337/1: mm: Do not invoke OOM for higher order IOMMU DMA allocations ...