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=-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 9B555C433DB for ; Wed, 27 Jan 2021 12:16:09 +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 42EC720786 for ; Wed, 27 Jan 2021 12:16:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 42EC720786 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=gyz4nLjNpj1JhqdtCCwhQlMjocmQvW0f0NNYJLmXxAw=; b=O2WDkWnFyVYpzB+MOlMewQ98Z juWBOwPIxqfji6CHD7grPIEzbvv+sgtQ2SzTE+ybFW7TyTck2gPdnV07u2pKI2yD+G3VTNBvuXaN2 /MrShRu5v7ZFhBZyH+GHLCXOKYFMsXfSANQI62o6GuE74XOZEGZuiQ2VoqFtSX0UxZFCEayeRd6xL gfnRzAndE2gk4nF2SgRIL/OqesKtrqPjdCC+RkdODU5AsW93fVJ3VpC47Kk/5RWZO/RJqK66jkyJ1 hzYgRb3KZG/VeWKFzrc8FOBH69ursfdnIq/2NEJ5cErwmaglYKI98yBX8quvoy7g5fqo9ZXxj+ypP OY+AP2xsA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l4jiE-0006C7-6x; Wed, 27 Jan 2021 12:14:18 +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 1l4ji8-00069g-2D for linux-arm-kernel@lists.infradead.org; Wed, 27 Jan 2021 12:14:13 +0000 Received: from DGGEMS404-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4DQjCm6jHMzMQjY; Wed, 27 Jan 2021 20:12:36 +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 20:13:59 +0800 From: Shenming Lu To: Marc Zyngier , Eric Auger , "Will Deacon" , , , , Subject: [PATCH v3 1/4] KVM: arm64: GICv4.1: Add function to get VLPI state Date: Wed, 27 Jan 2021 20:13:34 +0800 Message-ID: <20210127121337.1092-2-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_071412_391055_436A1C29 X-CRM114-Status: GOOD ( 10.35 ) 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 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org With GICv4.1 and the vPE unmapped, which indicates the invalidation of any VPT caches associated with the vPE, we can get the VLPI state by peeking at the VPT. So we add a function for this. Signed-off-by: Shenming Lu --- arch/arm64/kvm/vgic/vgic-v4.c | 19 +++++++++++++++++++ arch/arm64/kvm/vgic/vgic.h | 1 + 2 files changed, 20 insertions(+) diff --git a/arch/arm64/kvm/vgic/vgic-v4.c b/arch/arm64/kvm/vgic/vgic-v4.c index 66508b03094f..ac029ba3d337 100644 --- a/arch/arm64/kvm/vgic/vgic-v4.c +++ b/arch/arm64/kvm/vgic/vgic-v4.c @@ -203,6 +203,25 @@ void vgic_v4_configure_vsgis(struct kvm *kvm) kvm_arm_resume_guest(kvm); } +/* + * Must be called with GICv4.1 and the vPE unmapped, which + * indicates the invalidation of any VPT caches associated + * with the vPE, thus we can get the VLPI state by peeking + * at the VPT. + */ +void vgic_v4_get_vlpi_state(struct vgic_irq *irq, bool *val) +{ + struct its_vpe *vpe = &irq->target_vcpu->arch.vgic_cpu.vgic_v3.its_vpe; + int mask = BIT(irq->intid % BITS_PER_BYTE); + void *va; + u8 *ptr; + + va = page_address(vpe->vpt_page); + ptr = va + irq->intid / BITS_PER_BYTE; + + *val = !!(*ptr & mask); +} + /** * vgic_v4_init - Initialize the GICv4 data structures * @kvm: Pointer to the VM being initialized diff --git a/arch/arm64/kvm/vgic/vgic.h b/arch/arm64/kvm/vgic/vgic.h index 64fcd7511110..d8cfd360838c 100644 --- a/arch/arm64/kvm/vgic/vgic.h +++ b/arch/arm64/kvm/vgic/vgic.h @@ -317,5 +317,6 @@ bool vgic_supports_direct_msis(struct kvm *kvm); int vgic_v4_init(struct kvm *kvm); void vgic_v4_teardown(struct kvm *kvm); void vgic_v4_configure_vsgis(struct kvm *kvm); +void vgic_v4_get_vlpi_state(struct vgic_irq *irq, bool *val); #endif -- 2.19.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel