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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 39925C433E6 for ; Wed, 27 Jan 2021 12:19:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EB01420791 for ; Wed, 27 Jan 2021 12:19:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237738AbhA0MSO (ORCPT ); Wed, 27 Jan 2021 07:18:14 -0500 Received: from szxga05-in.huawei.com ([45.249.212.191]:11519 "EHLO szxga05-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235817AbhA0MPC (ORCPT ); Wed, 27 Jan 2021 07:15:02 -0500 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" , , , , CC: Alex Williamson , Cornelia Huck , Lorenzo Pieralisi , , , 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 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-Originating-IP: [10.174.186.182] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.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; -- 2.19.1