Messages in this thread Patch in this message | | | From | Marc Zyngier <> | Subject | [PATCH v2 3/6] arm64: Mark the recheduling IPI as raw interrupt | Date | Tue, 24 Nov 2020 14:14:46 +0000 |
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Flag the rescheduling IPI as 'raw', making sure such interrupt skips both tick management and irqtime accounting.
Signed-off-by: Marc Zyngier <maz@kernel.org> --- arch/arm64/Kconfig | 1 + arch/arm64/kernel/smp.c | 4 ++++ 2 files changed, 5 insertions(+)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 1515f6f153a0..d18c2c15848d 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -108,6 +108,7 @@ config ARM64 select GENERIC_EARLY_IOREMAP select GENERIC_IDLE_POLL_SETUP select GENERIC_IRQ_IPI + select ARCH_WANTS_IRQ_RAW select GENERIC_IRQ_MULTI_HANDLER select GENERIC_IRQ_PROBE select GENERIC_IRQ_SHOW diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 18e9727d3f64..bad51f7f7ffe 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -995,6 +995,10 @@ void __init set_smp_ipi_range(int ipi_base, int n) ipi_desc[i] = irq_to_desc(ipi_base + i); irq_set_status_flags(ipi_base + i, IRQ_HIDDEN); + + /* The recheduling IPI is special... */ + if (i == IPI_RESCHEDULE) + __irq_modify_status(ipi_base + i, 0, IRQ_RAW, ~0); } ipi_irq_base = ipi_base; -- 2.28.0
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