From patchwork Mon Nov 23 06:54:09 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Shenming Lu X-Patchwork-Id: 11924453 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=-16.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,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 CE34EC2D0E4 for ; Mon, 23 Nov 2020 06:56:25 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 593EC20773 for ; Mon, 23 Nov 2020 06:56:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="Am0lba7k" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 593EC20773 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; 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:MIME-Version:References:In-Reply-To:Message-ID:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=XJE/NKRAy4Vyi84KedSwzmlZhszSZ3N0M9UXTu1aNv4=; b=Am0lba7k3BsYARnorfHYL7jdj lOvC+F850U7AdbopUV8O0tflFL+yT7sP0S2PXswuK4XF3CyDv70gGv62vrgSNGzkIFZwg0VsP6kTM W1Jpp0PSBsbz8aNXVfedQYeyZwI2MPqQJfjE+AAstTq3hLhAWaZYlIYMeFbcI3ofUavraZNXel+9T HkBtZijG+I7EaGKsma5YBvXX+WF9cr1Pw7KFx97c/uHGotBupXfn1Ac0WMjyRpCEEOSoC8Yas6UbO YxH6+bnPZuwD0cZpzgM+7EUEqTVrCbgMlD+8/lMuL0LWg+VGql/pYekm4T1RwSkk6NAoUBDYumr8Q 9ie1vTz9A==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kh5kn-0007xS-VC; Mon, 23 Nov 2020 06:55:13 +0000 Received: from szxga05-in.huawei.com ([45.249.212.191]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kh5kf-0007vE-JY for linux-arm-kernel@lists.infradead.org; Mon, 23 Nov 2020 06:55:06 +0000 Received: from DGGEMS405-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4CfdDt1sSMzhg2x; Mon, 23 Nov 2020 14:54:38 +0800 (CST) Received: from DESKTOP-7FEPK9S.china.huawei.com (10.174.187.74) by DGGEMS405-HUB.china.huawei.com (10.3.19.205) with Microsoft SMTP Server id 14.3.487.0; Mon, 23 Nov 2020 14:54:46 +0800 From: Shenming Lu To: Marc Zyngier , James Morse , "Julien Thierry" , Suzuki K Poulose , Eric Auger , , , , , Christoffer Dall Subject: [RFC PATCH v1 3/4] KVM: arm64: GICv4.1: Restore VLPI's pending state to physical side Date: Mon, 23 Nov 2020 14:54:09 +0800 Message-ID: <20201123065410.1915-4-lushenming@huawei.com> X-Mailer: git-send-email 2.27.0.windows.1 In-Reply-To: <20201123065410.1915-1-lushenming@huawei.com> References: <20201123065410.1915-1-lushenming@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.187.74] X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201123_015505_910213_9B06110C X-CRM114-Status: UNSURE ( 8.88 ) X-CRM114-Notice: Please train this message. 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: Neo Jia , Cornelia Huck , Kirti Wankhede , lushenming@huawei.com, Alex Williamson , yuzenghui@huawei.com, wanghaibin.wang@huawei.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Zenghui Yu When setting the forwarding path of a VLPI, it is more consistent to also transfer the pending state from irq->pending_latch to VPT (especially in migration, the pending states of VLPIs are restored into kvm’s vgic first). And we currently send "INT+VSYNC" to trigger a VLPI to pending. Signed-off-by: Zenghui Yu Signed-off-by: Shenming Lu --- arch/arm64/kvm/vgic/vgic-v4.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/arm64/kvm/vgic/vgic-v4.c b/arch/arm64/kvm/vgic/vgic-v4.c index b5fa73c9fd35..cc3ab9cea182 100644 --- a/arch/arm64/kvm/vgic/vgic-v4.c +++ b/arch/arm64/kvm/vgic/vgic-v4.c @@ -418,6 +418,18 @@ int kvm_vgic_v4_set_forwarding(struct kvm *kvm, int virq, irq->host_irq = virq; atomic_inc(&map.vpe->vlpi_count); + /* Transfer pending state */ + ret = irq_set_irqchip_state(irq->host_irq, + IRQCHIP_STATE_PENDING, + irq->pending_latch); + WARN_RATELIMIT(ret, "IRQ %d", irq->host_irq); + + /* + * Let it be pruned from ap_list later and don't bother + * the List Register. + */ + irq->pending_latch = false; + out: mutex_unlock(&its->its_lock); return ret;