[PATCH] riscv: enable software resend of irqs

From: Conor Dooley <conor.dooley@microchip.com>
To: <aou@eecs.berkeley.edu>, <palmer@dabbelt.com>,
	<paul.walmsley@sifive.com>, <linux-riscv@lists.infradead.org>
Cc: <conor.dooley@microchip.com>, <samuel@sholland.org>,
	<dfustini@baylibre.com>
Subject: [PATCH] riscv: enable software resend of irqs
Date: Fri, 29 Jul 2022 12:11:17 +0100	[thread overview]
Message-ID: <20220729111116.259146-1-conor.dooley@microchip.com> (raw)

The PLIC specification does not describe the interrupt pendings bits as
read-write, only that they "can be read". To allow for retriggering of
interrupts (and the use of the irq debugfs interface) enable
HARDIRQS_SW_RESEND for RISC-V.

Link: https://github.com/riscv/riscv-plic-spec/blob/master/riscv-plic.adoc#interrupt-pending-bits
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
---
 arch/riscv/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 55d2cc458ace..d8a132426c64 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -69,6 +69,7 @@ config RISCV
 	select GENERIC_SMP_IDLE_THREAD
 	select GENERIC_TIME_VSYSCALL if MMU && 64BIT
 	select GENERIC_VDSO_TIME_NS if HAVE_GENERIC_VDSO
+	select HARDIRQS_SW_RESEND
 	select HAVE_ARCH_AUDITSYSCALL
 	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
 	select HAVE_ARCH_JUMP_LABEL_RELATIVE if !XIP_KERNEL
-- 
2.36.1


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