From patchwork Mon Jan 4 08:16:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Shenming Lu X-Patchwork-Id: 11996299 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=-17.0 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 DA06EC433E0 for ; Mon, 4 Jan 2021 08:18:31 +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 6F65520784 for ; Mon, 4 Jan 2021 08:18:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6F65520784 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=uGr3s6BVhb4ijDbLh2W32vwdBD7GEF0zAYwqOse0SK4=; b=JyR0g5iGmryitfLQ1DR8JLb1z G/0Z2gJ35aaOXLsfnAzX/GlEdi0e3aCvfpAKe3gLIEswW+N/zTh+By6XpgMQaFBFJTfueWOtO9Okb f4xlRJTmYpoKSO1S9n7h+Ybn+lCuSnwWVCYojanjYIf+vfmcdMBb/VFYMHnUUZMTvOyGpj9+xj2W5 XUEPz+GTFhD8fKDboQRbo+rnkiPHKCCqfN6YuLRPYuNFDX355dHi7jD3kgQxHcrl75KAPM1LE7+1I J/AgbIt8+8ZoTgdwW5aL1yLoFSOLzUORlJ7F10XEy/GF7LB2IpmJBvE8Do9T6AJYML3hzSGmDCmGW XQdY8jYzQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kwL38-0007lV-Uj; Mon, 04 Jan 2021 08:17:11 +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 1kwL35-0007jf-T3 for linux-arm-kernel@lists.infradead.org; Mon, 04 Jan 2021 08:17:09 +0000 Received: from DGGEMS403-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4D8T3G2fdKzMF8b; Mon, 4 Jan 2021 16:15:54 +0800 (CST) Received: from DESKTOP-7FEPK9S.china.huawei.com (10.174.184.196) by DGGEMS403-HUB.china.huawei.com (10.3.19.203) with Microsoft SMTP Server id 14.3.498.0; Mon, 4 Jan 2021 16:16:54 +0800 From: Shenming Lu To: Marc Zyngier , Eric Auger , "Will Deacon" , , , , Subject: [RFC PATCH v2 3/4] KVM: arm64: GICv4.1: Restore VLPI's pending state to physical side Date: Mon, 4 Jan 2021 16:16:12 +0800 Message-ID: <20210104081613.100-4-lushenming@huawei.com> X-Mailer: git-send-email 2.27.0.windows.1 In-Reply-To: <20210104081613.100-1-lushenming@huawei.com> References: <20210104081613.100-1-lushenming@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.184.196] X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210104_031708_231450_66692247 X-CRM114-Status: UNSURE ( 8.55 ) 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 | 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 f211a7c32704..7945d6d09cdd 100644 --- a/arch/arm64/kvm/vgic/vgic-v4.c +++ b/arch/arm64/kvm/vgic/vgic-v4.c @@ -454,6 +454,18 @@ 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;