From patchwork Wed Jan 27 12:13:36 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Shenming Lu X-Patchwork-Id: 12049907 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=-17.1 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 2B91BC433E0 for ; Wed, 27 Jan 2021 12:16:13 +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 CF89A20786 for ; Wed, 27 Jan 2021 12:16:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CF89A20786 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=Du2rRkg2tSz5zo141WTt+o0J0n6JBLOa/7L/xVSqt7Y=; b=b07npWicm2oEAPufLoNFDuG7u vpX8Go8BVLzHNl8NTPXwtlQ2Ea3AYWTGSaJKWlTw0jqAOSPo9Vr54XKWFt0JEZnaMhUslqYsJGeLm sMVCxaTZRgozDlSVUp/0sInukkQYeGib6at48lAbMSs2nb7L/XEacF0NFGSgY/BZDiViado72M+mz XZLqHlX1eoCuFzXfmmlgU/xPfx77GcXTOAP49V73NYHXgTpgUPMSZlBmHHhlnWeo2IiM4poID4ktw vJTE7b1SLlbHx6iRSPln00Jkiy8BEBS6TCkafYez2IZsJyrB4Em/YG3yg7CVlYdWS+YgiZmD8Nrij va2XOxJ6Q==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l4jiS-0006Hf-NB; Wed, 27 Jan 2021 12:14:32 +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 1l4jiD-0006BQ-Lq for linux-arm-kernel@lists.infradead.org; Wed, 27 Jan 2021 12:14:19 +0000 Received: from DGGEMS404-HUB.china.huawei.com (unknown [172.30.72.59]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4DQjDF3lVtzjDSK; Wed, 27 Jan 2021 20:13:01 +0800 (CST) Received: from DESKTOP-7FEPK9S.china.huawei.com (10.174.186.182) by DGGEMS404-HUB.china.huawei.com (10.3.19.204) with Microsoft SMTP Server id 14.3.498.0; Wed, 27 Jan 2021 20:14:07 +0800 From: Shenming Lu To: Marc Zyngier , Eric Auger , "Will Deacon" , , , , Subject: [PATCH v3 3/4] KVM: arm64: GICv4.1: Restore VLPI's pending state to physical side Date: Wed, 27 Jan 2021 20:13:36 +0800 Message-ID: <20210127121337.1092-4-lushenming@huawei.com> X-Mailer: git-send-email 2.27.0.windows.1 In-Reply-To: <20210127121337.1092-1-lushenming@huawei.com> References: <20210127121337.1092-1-lushenming@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.186.182] X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210127_071418_012788_92ACF635 X-CRM114-Status: UNSURE ( 8.93 ) 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: Lorenzo Pieralisi , Cornelia Huck , 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 (switch to the HW mode), we could 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 | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm64/kvm/vgic/vgic-v4.c b/arch/arm64/kvm/vgic/vgic-v4.c index ac029ba3d337..a3542af6f04a 100644 --- a/arch/arm64/kvm/vgic/vgic-v4.c +++ b/arch/arm64/kvm/vgic/vgic-v4.c @@ -449,6 +449,20 @@ int kvm_vgic_v4_set_forwarding(struct kvm *kvm, int virq, irq->host_irq = virq; atomic_inc(&map.vpe->vlpi_count); + /* Transfer pending state */ + if (irq->pending_latch) { + 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;