mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-27 05:20:58 +07:00
f1e0bb0ad4
ARM and ARM64 have almost identical code for migrating interrupts on cpu hotunplug. Provide a generic version which can be used by both. The new code addresses a shortcoming in the ARM[64] variants which fails to update the affinity change in some cases. The solution for this is to use the core function irq_do_set_affinity() instead of open coding it. [ tglx: Added copyright notice and license boilerplate. Rewrote subject and changelog. ] Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Acked-by: Russell King - ARM Linux <linux@arm.linux.org.uk> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Hanjun Guo <hanjun.guo@linaro.org> Cc: <linux-arm-kernel@lists.infradead.org> Link: http://lkml.kernel.org/r/1443087135-17044-2-git-send-email-yangyingliang@huawei.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
108 lines
2.6 KiB
Plaintext
108 lines
2.6 KiB
Plaintext
menu "IRQ subsystem"
|
|
# Options selectable by the architecture code
|
|
|
|
# Make sparse irq Kconfig switch below available
|
|
config MAY_HAVE_SPARSE_IRQ
|
|
bool
|
|
|
|
# Legacy support, required for itanic
|
|
config GENERIC_IRQ_LEGACY
|
|
bool
|
|
|
|
# Enable the generic irq autoprobe mechanism
|
|
config GENERIC_IRQ_PROBE
|
|
bool
|
|
|
|
# Use the generic /proc/interrupts implementation
|
|
config GENERIC_IRQ_SHOW
|
|
bool
|
|
|
|
# Print level/edge extra information
|
|
config GENERIC_IRQ_SHOW_LEVEL
|
|
bool
|
|
|
|
# Facility to allocate a hardware interrupt. This is legacy support
|
|
# and should not be used in new code. Use irq domains instead.
|
|
config GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
|
|
bool
|
|
|
|
# Support for delayed migration from interrupt context
|
|
config GENERIC_PENDING_IRQ
|
|
bool
|
|
|
|
# Support for generic irq migrating off cpu before the cpu is offline.
|
|
config GENERIC_IRQ_MIGRATION
|
|
bool
|
|
|
|
# Alpha specific irq affinity mechanism
|
|
config AUTO_IRQ_AFFINITY
|
|
bool
|
|
|
|
# Tasklet based software resend for pending interrupts on enable_irq()
|
|
config HARDIRQS_SW_RESEND
|
|
bool
|
|
|
|
# Preflow handler support for fasteoi (sparc64)
|
|
config IRQ_PREFLOW_FASTEOI
|
|
bool
|
|
|
|
# Edge style eoi based handler (cell)
|
|
config IRQ_EDGE_EOI_HANDLER
|
|
bool
|
|
|
|
# Generic configurable interrupt chip implementation
|
|
config GENERIC_IRQ_CHIP
|
|
bool
|
|
select IRQ_DOMAIN
|
|
|
|
# Generic irq_domain hw <--> linux irq number translation
|
|
config IRQ_DOMAIN
|
|
bool
|
|
|
|
# Support for hierarchical irq domains
|
|
config IRQ_DOMAIN_HIERARCHY
|
|
bool
|
|
select IRQ_DOMAIN
|
|
|
|
# Generic MSI interrupt support
|
|
config GENERIC_MSI_IRQ
|
|
bool
|
|
|
|
# Generic MSI hierarchical interrupt domain support
|
|
config GENERIC_MSI_IRQ_DOMAIN
|
|
bool
|
|
select IRQ_DOMAIN_HIERARCHY
|
|
select GENERIC_MSI_IRQ
|
|
|
|
config HANDLE_DOMAIN_IRQ
|
|
bool
|
|
|
|
config IRQ_DOMAIN_DEBUG
|
|
bool "Expose hardware/virtual IRQ mapping via debugfs"
|
|
depends on IRQ_DOMAIN && DEBUG_FS
|
|
help
|
|
This option will show the mapping relationship between hardware irq
|
|
numbers and Linux irq numbers. The mapping is exposed via debugfs
|
|
in the file "irq_domain_mapping".
|
|
|
|
If you don't know what this means you don't need it.
|
|
|
|
# Support forced irq threading
|
|
config IRQ_FORCED_THREADING
|
|
bool
|
|
|
|
config SPARSE_IRQ
|
|
bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
|
|
---help---
|
|
|
|
Sparse irq numbering is useful for distro kernels that want
|
|
to define a high CONFIG_NR_CPUS value but still want to have
|
|
low kernel memory footprint on smaller machines.
|
|
|
|
( Sparse irqs can also be beneficial on NUMA boxes, as they spread
|
|
out the interrupt descriptors in a more NUMA-friendly way. )
|
|
|
|
If you don't know what to do here, say N.
|
|
|
|
endmenu
|