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From: Christoph Hellwig <hch@lst.de>
To: Palmer Dabbelt <palmer@sifive.com>
Cc: linux-riscv@lists.infradead.org
Subject: [PATCH 6/9] riscv: also clear all pending interrupts when booting
Date: Thu, 11 Apr 2019 13:56:20 +0200	[thread overview]
Message-ID: <20190411115623.5749-7-hch@lst.de> (raw)
In-Reply-To: <20190411115623.5749-1-hch@lst.de>

Just in case an old interrupt is pending make sure we clear everything
asserted before this kernel started.  Based on similar M-mode code in
opensbi.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 arch/riscv/kernel/head.S | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/kernel/head.S b/arch/riscv/kernel/head.S
index 9344d9ceda24..62d2c9c85433 100644
--- a/arch/riscv/kernel/head.S
+++ b/arch/riscv/kernel/head.S
@@ -22,8 +22,9 @@
 
 __INIT
 ENTRY(_start)
-	/* Mask all interrupts */
+	/* Mask and clear all interrupts */
 	csrw sie, zero
+	csrw sip, zero
 
 	/* Load the global pointer */
 .option push
-- 
2.20.1


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  parent reply	other threads:[~2019-04-11 11:57 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-11 11:56 misc cleanups Christoph Hellwig
2019-04-11 11:56 ` [PATCH 1/9] riscv: use asm-generic/extable.h Christoph Hellwig
2019-04-25 19:00   ` Paul Walmsley
2019-04-11 11:56 ` [PATCH 2/9] riscv: remove dead big endian code Christoph Hellwig
2019-04-11 15:40   ` Nick Kossifidis
2019-04-11 15:47     ` Christoph Hellwig
2019-04-11 16:08       ` Nick Kossifidis
2019-04-11 16:31         ` Christoph Hellwig
2019-04-11 16:47           ` Nick Kossifidis
2019-04-12  6:07             ` Christoph Hellwig
2019-04-11 11:56 ` [PATCH 3/9] riscv: remove CONFIG_RISCV_ISA_A Christoph Hellwig
2019-04-11 12:21   ` Andreas Schwab
2019-04-12  1:23     ` Palmer Dabbelt
2019-04-12  5:51       ` Christoph Hellwig
2019-04-11 11:56 ` [PATCH 4/9] riscv: turn mm_segment_t into a struct Christoph Hellwig
2019-04-11 11:56 ` [PATCH 5/9] riscv: simplify stack pointer setup in head.S Christoph Hellwig
2019-04-11 20:54   ` Atish Patra
2019-04-11 11:56 ` Christoph Hellwig [this message]
2019-04-11 15:43   ` [PATCH 6/9] riscv: also clear all pending interrupts when booting Nick Kossifidis
2019-04-11 18:52   ` Atish Patra
2019-04-11 11:56 ` [PATCH 7/9] riscv: remove duplicate macros from ptrace.h Christoph Hellwig
2019-04-11 15:46   ` Nick Kossifidis
2019-04-11 15:55     ` Nick Kossifidis
2019-04-11 16:03       ` Nick Kossifidis
2019-04-11 16:17         ` Christoph Hellwig
2019-04-11 16:38           ` Nick Kossifidis
2019-04-11 16:06       ` Christoph Hellwig
2019-04-25 19:13   ` Paul Walmsley
2019-04-25 19:13     ` Paul Walmsley
2019-04-25 19:54     ` Christoph Hellwig
2019-04-25 19:54       ` Christoph Hellwig
2019-04-25 20:05       ` Paul Walmsley
2019-04-25 20:05         ` Paul Walmsley
2019-04-11 11:56 ` [PATCH 8/9] riscv: print the unexpected interrupt cause Christoph Hellwig
2019-04-11 15:52   ` Nick Kossifidis
2019-04-11 15:54     ` Christoph Hellwig
2019-04-25 18:59   ` Paul Walmsley
2019-04-11 11:56 ` [PATCH 9/9] riscv: call pm_power_off from machine_halt / machine_power_off Christoph Hellwig
2019-04-11 18:53   ` Atish Patra
2019-04-25 19:57   ` Paul Walmsley
2019-04-25 19:57     ` Paul Walmsley
2019-05-21 10:33   ` Andreas Schwab

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