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spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=dA4VlBMsz/5I/TPyaI2JhPXy9QUDGmHo1tdfrBSRDag=; b=sRUCcLgk45LIpdud8SG2JtVfm VWQtvZ6dTKWhF324Tj4vMKojvSBHgJNW2Pb3nlBlqcaIy6yh92ik7GlJxF8fOxSPYLx4FQiGI6qMV ZrCCRLACgQKaCLAJeP3N0UCE/Wtvys5wRaHH1R46Gv6ITRycFNX+o74ry1BaA2QvMO2QCBQL51NTA 4cH81+egFTWyxjQjpJhikx24n4Ad4hTSFOfypVbYqm1Eex7ApLqXnCVzk4dJOZx9yIIaNx0+vgA3B GDFZQPgujD34TzRXQn63ubVWMB1UHHskuU3JzF1LB64yj5kkIf8lq6U9PjhEc2xBAdx7kDetiVrB2 2QnbbsDxA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1knNfn-0003wj-UT; Thu, 10 Dec 2020 15:16:03 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1knNfl-0003vX-H2 for linux-arm-kernel@lists.infradead.org; Thu, 10 Dec 2020 15:16:02 +0000 Date: Thu, 10 Dec 2020 15:15:55 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1607613360; bh=kHNS8N1Y1yxm0DyC7/WLIFewRb1Wj0ozzwMLOaPUVUQ=; h=From:To:Cc:Subject:References:In-Reply-To:From; b=dC7k2aLpmUOreTjvbYcnBBIQmHfNZv+HAQstLkyreKoO9vMMN58oVM8U7CuRxFaFq wwGXIUCRx9oMS72bZGZ17wOwuul00XvKA8qJ1qTjVmD3Evjay2/8E9EDI/ABecu8Np Uqh4Qbgge2BQubbk2q2X9EcD0YcaL5EhKQIBKmNAeqrGTbM/jmYgj5qwVjq8QjOXz7 0V5HXTPCa+DGH4UNLJvUsvrKu+rghn5aLGg7WzK1VRZB1y7qp6BE19kvrHmcamVaLm DgdbpyXWVPFpEY3S4hZ6PtwN31AQA81jfr0n29k+eex0Y3VsPyG9mXT1M19rwrqb/5 kGwG09YCrwdkw== From: Will Deacon To: Marc Zyngier Subject: Re: [PATCH v2 3/6] arm64: Mark the recheduling IPI as raw interrupt Message-ID: <20201210151555.GB10381@willie-the-truck> References: <20201124141449.572446-1-maz@kernel.org> <20201124141449.572446-4-maz@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20201124141449.572446-4-maz@kernel.org> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201210_101601_695335_705094DE X-CRM114-Status: GOOD ( 15.88 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Russell King , Peter Zijlstra , Catalin Marinas , linux-kernel , Thomas Gleixner , Android Kernel Team , Valentin Schneider , LAK Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Nov 24, 2020 at 02:14:46PM +0000, Marc Zyngier wrote: > 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); Acked-by: Will Deacon Although this part isn't the controversial bit :) Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel