1. 13 Sep, 2020 3 commits
    • Marc Zyngier's avatar
      arm64: Allow IPIs to be handled as normal interrupts · d3afc7f1
      Marc Zyngier authored
      In order to deal with IPIs as normal interrupts, let's add
      a new way to register them with the architecture code.
      
      set_smp_ipi_range() takes a range of interrupts, and allows
      the arch code to request them as if the were normal interrupts.
      A standard handler is then called by the core IRQ code to deal
      with the IPI.
      
      This means that we don't need to call irq_enter/irq_exit, and
      that we don't need to deal with set_irq_regs either. So let's
      move the dispatcher into its own function, and leave handle_IPI()
      as a compatibility function.
      
      On the sending side, let's make use of ipi_send_mask, which
      already exists for this purpose.
      
      One of the major difference is that we end up, in some cases
      (such as when performing IRQ time accounting on the scheduler
      IPI), end up with nested irq_enter()/irq_exit() pairs.
      Other than the (relatively small) overhead, there should be
      no consequences to it (these pairs are designed to nest
      correctly, and the accounting shouldn't be off).
      Reviewed-by: default avatarValentin Schneider <valentin.schneider@arm.com>
      Acked-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
      Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
      d3afc7f1
    • Marc Zyngier's avatar
      genirq: Allow interrupts to be excluded from /proc/interrupts · 83cfac95
      Marc Zyngier authored
      A number of architectures implement IPI statistics directly,
      duplicating the core kstat_irqs accounting. As we move IPIs to
      being actual IRQs, we would end-up with a confusing display
      in /proc/interrupts (where the IPIs would appear twice).
      
      In order to solve this, allow interrupts to be flagged as
      "hidden", which excludes them from /proc/interrupts.
      Reviewed-by: default avatarValentin Schneider <valentin.schneider@arm.com>
      Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
      83cfac95
    • Marc Zyngier's avatar
      genirq: Add fasteoi IPI flow · c5e5ec03
      Marc Zyngier authored
      For irqchips using the fasteoi flow, IPIs are a bit special.
      They need to be EOI'd early (before calling the handler), as
      funny things may happen in the handler (they do not necessarily
      behave like a normal interrupt).
      Reviewed-by: default avatarValentin Schneider <valentin.schneider@arm.com>
      Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
      c5e5ec03
  2. 07 Sep, 2020 1 commit
  3. 06 Sep, 2020 4 commits
    • Linus Torvalds's avatar
      Merge tag 'io_uring-5.9-2020-09-06' of git://git.kernel.dk/linux-block · a8205e31
      Linus Torvalds authored
      Pull more io_uring fixes from Jens Axboe:
       "Two followup fixes. One is fixing a regression from this merge window,
        the other is two commits fixing cancelation of deferred requests.
      
        Both have gone through full testing, and both spawned a few new
        regression test additions to liburing.
      
         - Don't play games with const, properly store the output iovec and
           assign it as needed.
      
         - Deferred request cancelation fix (Pavel)"
      
      * tag 'io_uring-5.9-2020-09-06' of git://git.kernel.dk/linux-block:
        io_uring: fix linked deferred ->files cancellation
        io_uring: fix cancel of deferred reqs with ->files
        io_uring: fix explicit async read/write mapping for large segments
      a8205e31
    • Linus Torvalds's avatar
      Merge tag 'iommu-fixes-v5.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu · 2ccdd9f8
      Linus Torvalds authored
      Pull iommu fixes from Joerg Roedel:
      
       - three Intel VT-d fixes to fix address handling on 32bit, fix a NULL
         pointer dereference bug and serialize a hardware register access as
         required by the VT-d spec.
      
       - two patches for AMD IOMMU to force AMD GPUs into translation mode
         when memory encryption is active and disallow using IOMMUv2
         functionality.  This makes the AMDGPU driver work when memory
         encryption is active.
      
       - two more fixes for AMD IOMMU to fix updating the Interrupt Remapping
         Table Entries.
      
       - MAINTAINERS file update for the Qualcom IOMMU driver.
      
      * tag 'iommu-fixes-v5.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
        iommu/vt-d: Handle 36bit addressing for x86-32
        iommu/amd: Do not use IOMMUv2 functionality when SME is active
        iommu/amd: Do not force direct mapping when SME is active
        iommu/amd: Use cmpxchg_double() when updating 128-bit IRTE
        iommu/amd: Restore IRTE.RemapEn bit after programming IRTE
        iommu/vt-d: Fix NULL pointer dereference in dev_iommu_priv_set()
        iommu/vt-d: Serialize IOMMU GCMD register modifications
        MAINTAINERS: Update QUALCOMM IOMMU after Arm SMMU drivers move
      2ccdd9f8
    • Linus Torvalds's avatar
      Merge tag 'x86-urgent-2020-09-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 015b3155
      Linus Torvalds authored
      Pull x86 fixes from Ingo Molnar:
      
       - more generic entry code ABI fallout
      
       - debug register handling bugfixes
      
       - fix vmalloc mappings on 32-bit kernels
      
       - kprobes instrumentation output fix on 32-bit kernels
      
       - fix over-eager WARN_ON_ONCE() on !SMAP hardware
      
       - NUMA debugging fix
      
       - fix Clang related crash on !RETPOLINE kernels
      
      * tag 'x86-urgent-2020-09-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/entry: Unbreak 32bit fast syscall
        x86/debug: Allow a single level of #DB recursion
        x86/entry: Fix AC assertion
        tracing/kprobes, x86/ptrace: Fix regs argument order for i386
        x86, fakenuma: Fix invalid starting node ID
        x86/mm/32: Bring back vmalloc faulting on x86_32
        x86/cmdline: Disable jump tables for cmdline.c
      015b3155
    • Linus Torvalds's avatar
      Merge tag 'for-linus-5.9-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip · 68beef57
      Linus Torvalds authored
      Pull xen updates from Juergen Gross:
       "A small series for fixing a problem with Xen PVH guests when running
        as backends (e.g. as dom0).
      
        Mapping other guests' memory is now working via ZONE_DEVICE, thus not
        requiring to abuse the memory hotplug functionality for that purpose"
      
      * tag 'for-linus-5.9-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
        xen: add helpers to allocate unpopulated memory
        memremap: rename MEMORY_DEVICE_DEVDAX to MEMORY_DEVICE_GENERIC
        xen/balloon: add header guard
      68beef57
  4. 05 Sep, 2020 28 commits
  5. 04 Sep, 2020 4 commits