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author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-03-31 03:35:14 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-03-31 03:35:14 +0300 |
commit | 2d385336afcc43732aef1d51528c03f177ecd54e (patch) | |
tree | fff0780aea481a225c4d3460aad286c8e95aa1e7 /arch/x86 | |
parent | 673b41e04a035d760bc0aff83fa9ee24fd9c2779 (diff) | |
parent | 8a13b02a010a743ea0725e9a5454f42cddb65cf0 (diff) | |
download | linux-2d385336afcc43732aef1d51528c03f177ecd54e.tar.xz |
Merge tag 'irq-core-2020-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq updates from Thomas Gleixner:
"Updates for the interrupt subsystem:
Treewide:
- Cleanup of setup_irq() which is not longer required because the
memory allocator is available early.
Most cleanup changes come through the various maintainer trees, so
the final removal of setup_irq() is postponed towards the end of
the merge window.
Core:
- Protection against unsafe invocation of interrupt handlers and
unsafe interrupt injection including a fixup of the offending
PCI/AER error injection mechanism.
Invoking interrupt handlers from arbitrary contexts, i.e. outside
of an actual interrupt, can cause inconsistent state on the
fragile x86 interrupt affinity changing hardware trainwreck.
Drivers:
- Second wave of support for the new ARM GICv4.1
- Multi-instance support for Xilinx and PLIC interrupt controllers
- CPU-Hotplug support for PLIC
- The obligatory new driver for X1000 TCU
- Enhancements, cleanups and fixes all over the place"
* tag 'irq-core-2020-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (58 commits)
unicore32: Replace setup_irq() by request_irq()
sh: Replace setup_irq() by request_irq()
hexagon: Replace setup_irq() by request_irq()
c6x: Replace setup_irq() by request_irq()
alpha: Replace setup_irq() by request_irq()
irqchip/gic-v4.1: Eagerly vmap vPEs
irqchip/gic-v4.1: Add VSGI property setup
irqchip/gic-v4.1: Add VSGI allocation/teardown
irqchip/gic-v4.1: Move doorbell management to the GICv4 abstraction layer
irqchip/gic-v4.1: Plumb set_vcpu_affinity SGI callbacks
irqchip/gic-v4.1: Plumb get/set_irqchip_state SGI callbacks
irqchip/gic-v4.1: Plumb mask/unmask SGI callbacks
irqchip/gic-v4.1: Add initial SGI configuration
irqchip/gic-v4.1: Plumb skeletal VSGI irqchip
irqchip/stm32: Retrigger both in eoi and unmask callbacks
irqchip/gic-v3: Move irq_domain_update_bus_token to after checking for NULL domain
irqchip/xilinx: Do not call irq_set_default_host()
irqchip/xilinx: Enable generic irq multi handler
irqchip/xilinx: Fill error code when irq domain registration fails
irqchip/xilinx: Add support for multiple instances
...
Diffstat (limited to 'arch/x86')
-rw-r--r-- | arch/x86/Kconfig | 1 | ||||
-rw-r--r-- | arch/x86/kernel/apic/vector.c | 6 |
2 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index cb3633d243cb..51da546e0745 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -128,6 +128,7 @@ config X86 select GENERIC_GETTIMEOFDAY select GENERIC_VDSO_TIME_NS select GUP_GET_PTE_LOW_HIGH if X86_PAE + select HARDIRQS_SW_RESEND select HARDLOCKUP_CHECK_TIMESTAMP if X86_64 select HAVE_ACPI_APEI if ACPI select HAVE_ACPI_APEI_NMI if ACPI diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c index 48293d15f1e1..67768e54438b 100644 --- a/arch/x86/kernel/apic/vector.c +++ b/arch/x86/kernel/apic/vector.c @@ -557,6 +557,12 @@ static int x86_vector_alloc_irqs(struct irq_domain *domain, unsigned int virq, irqd->hwirq = virq + i; irqd_set_single_target(irqd); /* + * Prevent that any of these interrupts is invoked in + * non interrupt context via e.g. generic_handle_irq() + * as that can corrupt the affinity move state. + */ + irqd_set_handle_enforce_irqctx(irqd); + /* * Legacy vectors are already assigned when the IOAPIC * takes them over. They stay on the same vector. This is * required for check_timer() to work correctly as it might |