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=DKIM_INVALID,DKIM_SIGNED, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 D4DF4C43331 for ; Tue, 31 Mar 2020 12:17:27 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 8E51C20838 for ; Tue, 31 Mar 2020 12:17:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="sC7NV47O" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8E51C20838 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org 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 47A7C4B09A; Tue, 31 Mar 2020 08:17:27 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@kernel.org 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 RpKRTepKfC2s; Tue, 31 Mar 2020 08:17:26 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 641A24B0CA; Tue, 31 Mar 2020 08:17:25 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 79A154B0E2 for ; Tue, 31 Mar 2020 08:17:23 -0400 (EDT) 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 jDedsT8U-fmJ for ; Tue, 31 Mar 2020 08:17:22 -0400 (EDT) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 6B83D4B0B8 for ; Tue, 31 Mar 2020 08:17:20 -0400 (EDT) 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 99D2D21473; Tue, 31 Mar 2020 12:17:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585657039; bh=pF5jIxK97ltdsCKXvkyp8u1t0qhyes9Mxr4id4nqWic=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sC7NV47OGjr9KdjEnicTNouF55gGuNcFUtaG23ZR3MEcZ0cPVKrGmlo0ljSY8oArx i2UTyEPBf7BIbZH+omivfofAgGwxqBcNPrrdaeE/pHgROC4pdbKo7GIB7c0uB+MMrA vtZV9fj5OE/KeM5H9jl1MleuLQ7EPu13MtF79J6w= 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:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1jJFpV-00HBlI-Gt; Tue, 31 Mar 2020 13:17:17 +0100 From: Marc Zyngier To: Paolo Bonzini Subject: [PATCH 09/15] KVM: arm64: GICv4.1: Let doorbells be auto-enabled Date: Tue, 31 Mar 2020 13:16:39 +0100 Message-Id: <20200331121645.388250-10-maz@kernel.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200331121645.388250-1-maz@kernel.org> References: <20200331121645.388250-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: pbonzini@redhat.com, arnd@arndb.de, catalin.marinas@arm.com, christoffer.dall@arm.com, eric.auger@redhat.com, karahmed@amazon.de, linus.walleij@linaro.org, olof@lixom.net, vladimir.murzin@arm.com, will@kernel.org, yuzenghui@huawei.com, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Cc: kvm@vger.kernel.org, Arnd Bergmann , KarimAllah Ahmed , Catalin Marinas , Linus Walleij , linux-arm-kernel@lists.infradead.org, Olof Johansson , Will Deacon , kvmarm@lists.cs.columbia.edu 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: , 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 As GICv4.1 understands the life cycle of doorbells (instead of just randomly firing them at the most inconvenient time), just enable them at irq_request time, and be done with it. Signed-off-by: Marc Zyngier Reviewed-by: Zenghui Yu Reviewed-by: Eric Auger Link: https://lore.kernel.org/r/20200304203330.4967-18-maz@kernel.org --- virt/kvm/arm/vgic/vgic-v4.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/virt/kvm/arm/vgic/vgic-v4.c b/virt/kvm/arm/vgic/vgic-v4.c index 1eb0f8c76219..c2fcde104ea2 100644 --- a/virt/kvm/arm/vgic/vgic-v4.c +++ b/virt/kvm/arm/vgic/vgic-v4.c @@ -141,6 +141,7 @@ int vgic_v4_init(struct kvm *kvm) kvm_for_each_vcpu(i, vcpu, kvm) { int irq = dist->its_vm.vpes[i]->irq; + unsigned long irq_flags = DB_IRQ_FLAGS; /* * Don't automatically enable the doorbell, as we're @@ -148,8 +149,14 @@ int vgic_v4_init(struct kvm *kvm) * blocked. Also disable the lazy disabling, as the * doorbell could kick us out of the guest too * early... + * + * On GICv4.1, the doorbell is managed in HW and must + * be left enabled. */ - irq_set_status_flags(irq, DB_IRQ_FLAGS); + if (kvm_vgic_global_state.has_gicv4_1) + irq_flags &= ~IRQ_NOAUTOEN; + irq_set_status_flags(irq, irq_flags); + ret = request_irq(irq, vgic_v4_doorbell_handler, 0, "vcpu", vcpu); if (ret) { -- 2.25.0 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm