From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8A93AC64E7A for ; Tue, 24 Nov 2020 14:15:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 28545206FB for ; Tue, 24 Nov 2020 14:15:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="nrKyAJat" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388708AbgKXOPJ (ORCPT ); Tue, 24 Nov 2020 09:15:09 -0500 Received: from mail.kernel.org ([198.145.29.99]:49940 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388625AbgKXOO6 (ORCPT ); Tue, 24 Nov 2020 09:14:58 -0500 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 669FB206FB; Tue, 24 Nov 2020 14:14:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1606227297; bh=PrUzHkuQSWZIMZxZ+NQmmORR5bj7LQLhBBz/VO5uZHg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nrKyAJat45aUAhmn5/X5YWpFMTe3Djlzp7SmpOl7yqUrNwuG3fEdjYYnPCPgNngo0 AYQrAaRkmyapMI2bZMafFCYNAmOT/cGjN9fvOR1VNwi3LEjnRJww0sTO/nB4HfjwwH 7eaGO3t0fjm3SnPMZvkO4BnJES8RZrWNleJZqces= Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94) (envelope-from ) id 1khZ5r-00DGcy-Hz; Tue, 24 Nov 2020 14:14:55 +0000 From: Marc Zyngier To: LAK , linux-kernel Cc: Will Deacon , Catalin Marinas , Thomas Gleixner , Valentin Schneider , Peter Zijlstra , Mark Rutland , Russell King , Android Kernel Team Subject: [PATCH v2 3/6] arm64: Mark the recheduling IPI as raw interrupt Date: Tue, 24 Nov 2020 14:14:46 +0000 Message-Id: <20201124141449.572446-4-maz@kernel.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201124141449.572446-1-maz@kernel.org> References: <20201124141449.572446-1-maz@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, will@kernel.org, catalin.marinas@arm.com, tglx@linutronix.de, Valentin.Schneider@arm.com, peterz@infradead.org, mark.rutland@arm.com, linux@arm.linux.org.uk, kernel-team@android.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Flag the rescheduling IPI as 'raw', making sure such interrupt skips both tick management and irqtime accounting. Signed-off-by: Marc Zyngier --- 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