[05/12] riscv: clear all pending interrupts when booting

Message ID	20190412143948.12478-6-hch@lst.de (mailing list archive)
State	New, archived
Headers	show Return-Path: <linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org> From: Christoph Hellwig <hch@lst.de> To: Palmer Dabbelt <palmer@sifive.com> Subject: [PATCH 05/12] riscv: clear all pending interrupts when booting Date: Fri, 12 Apr 2019 16:39:41 +0200 Message-Id: <20190412143948.12478-6-hch@lst.de> In-Reply-To: <20190412143948.12478-1-hch@lst.de> References: <20190412143948.12478-1-hch@lst.de> MIME-Version: 1.0 Precedence: list Cc: Nick Kossifidis <mick@ics.forth.gr>, Atish Patra <atish.patra@wdc.com>, linux-riscv@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" <linux-riscv-bounces@lists.infradead.org> Errors-To: linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org
Series	[01/12] riscv: use asm-generic/extable.h \| expand [01/12] riscv: use asm-generic/extable.h [02/12] riscv: turn mm_segment_t into a struct [03/12] riscv: remove unreachable big endian code [04/12] riscv: remove CONFIG_RISCV_ISA_A [05/12] riscv: clear all pending interrupts when booting [06/12] riscv: simplify the stack pointer setup in head.S [07/12] riscv: cleanup the parse_dtb calling conventions [08/12] riscv: remove unreachable !CONFIG_FRAME_POINTER code [09/12] riscv: remove unreachable !HAVE_FUNCTION_GRAPH_RET_ADDR_PTR code [10/12] riscv: remove duplicate macros from ptrace.h [11/12] riscv: print the unexpected interrupt cause [12/12] riscv: call pm_power_off from machine_halt / machine_power_off

Message ID

20190412143948.12478-6-hch@lst.de (mailing list archive)

State

New, archived

Headers

From: Christoph Hellwig <hch@lst.de>
To: Palmer Dabbelt <palmer@sifive.com>
Subject: [PATCH 05/12] riscv: clear all pending interrupts when booting
Date: Fri, 12 Apr 2019 16:39:41 +0200
Message-Id: <20190412143948.12478-6-hch@lst.de>
In-Reply-To: <20190412143948.12478-1-hch@lst.de>
References: <20190412143948.12478-1-hch@lst.de>
MIME-Version: 1.0
Precedence: list
Cc: Nick Kossifidis <mick@ics.forth.gr>, Atish Patra <atish.patra@wdc.com>,
 linux-riscv@lists.infradead.org
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Sender: "linux-riscv" <linux-riscv-bounces@lists.infradead.org>
Errors-To: 
 linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org

Series

[01/12] riscv: use asm-generic/extable.h | expand

Commit Message

Christoph Hellwig April 12, 2019, 2:39 p.m. UTC

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>
Reviewed-by: Nick Kossifidis <mick@ics.forth.gr>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
---
 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 fe884cd69abd..9e3840d84d3e 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

[05/12] riscv: clear all pending interrupts when booting

Commit Message

Patch