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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 00621C5DF60 for ; Fri, 8 Nov 2019 14:43:17 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id A888E21D7F for ; Fri, 8 Nov 2019 14:43:16 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A888E21D7F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 60D024AF0B; Fri, 8 Nov 2019 09:43:16 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id LyH0Wtzn6HJo; Fri, 8 Nov 2019 09:43:15 -0500 (EST) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 37CFF4AF29; Fri, 8 Nov 2019 09:43:15 -0500 (EST) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id DB63E4AF17 for ; Fri, 8 Nov 2019 09:43:13 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id sU96p1dATO8D for ; Fri, 8 Nov 2019 09:43:13 -0500 (EST) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mm01.cs.columbia.edu (Postfix) with ESMTP id F11344AEE3 for ; Fri, 8 Nov 2019 09:43:10 -0500 (EST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 8B9147A7; Fri, 8 Nov 2019 06:43:10 -0800 (PST) Received: from donnerap.arm.com (donnerap.cambridge.arm.com [10.1.197.44]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6D3A13F719; Fri, 8 Nov 2019 06:43:09 -0800 (PST) From: Andre Przywara To: Andrew Jones , Paolo Bonzini Subject: [kvm-unit-tests PATCH 15/17] arm: gic: Provide FIQ handler Date: Fri, 8 Nov 2019 14:42:38 +0000 Message-Id: <20191108144240.204202-16-andre.przywara@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191108144240.204202-1-andre.przywara@arm.com> References: <20191108144240.204202-1-andre.przywara@arm.com> Cc: Marc Zyngier , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu When configuring an interrupt as Group 0, we can ask the GIC to deliver them as a FIQ. For this we need a separate exception handler. Provide this to be used later. Signed-off-by: Andre Przywara --- arm/gic.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/arm/gic.c b/arm/gic.c index c68b5b5..6756850 100644 --- a/arm/gic.c +++ b/arm/gic.c @@ -178,6 +178,30 @@ static void irq_handler(struct pt_regs *regs __unused) smp_wmb(); /* pairs with rmb in check_acked */ } +static inline void fiq_handler(struct pt_regs *regs __unused) +{ + u32 irqstat = gic_read_iar(0); + u32 irqnr = gic_iar_irqnr(irqstat); + + if (irqnr == GICC_INT_SPURIOUS) { + ++spurious[smp_processor_id()]; + smp_wmb(); + return; + } + + gic_write_eoir(irqstat, 0); + + smp_rmb(); /* pairs with wmb in stats_reset */ + ++acked[smp_processor_id()]; + if (irqnr < GIC_NR_PRIVATE_IRQS) { + check_ipi_sender(irqstat); + check_irqnr(irqnr, IPI_IRQ); + } else { + check_irqnr(irqnr, SPI_IRQ); + } + smp_wmb(); /* pairs with rmb in check_acked */ +} + static void gicv2_ipi_send_self(void) { writel(2 << 24 | IPI_IRQ, gicv2_dist_base() + GICD_SGIR); -- 2.17.1 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm