From patchwork Tue Jun 11 17:03:30 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 10987873 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3F28314DB for ; Tue, 11 Jun 2019 17:04:51 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2983D2807B for ; Tue, 11 Jun 2019 17:04:51 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1D0F6285D4; Tue, 11 Jun 2019 17:04:51 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id BACD42807B for ; Tue, 11 Jun 2019 17:04:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.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=8rP3qp3k8TV6grX7VTIkdTSYjBvP8vlAY/WJhIDzQhM=; b=G0oTFk6f+VYiOD gPXEtBWUvtrb3/FdqIJ166Cz9eM8WJ1pIp98fxbiimfNN+R6p54xFSlpathPOzs+VF6DpJSz0s+ww KkYiM0tzthKWFTFim2SALqCsu2Eq3Eml6YhbC4Ju5SpMkDOVhYimuXyWjy6ABWGHuOetwB+hp4UiI YKu4SoTTT0sTPkMi6uOSA2WSG1PXULhzgTPXAPY4mU0pqmnCOayj1RpXmWAFPhBuYyu7dOcyaMGnv lSoueD48DgdjN9tNdEOrbM+qUhD4hQWhfOdUhKtulHgyQSc0kUTABk+JO0SSKTq8WiGKNIrYWfmP4 Mti0n9MR5gmDqnGvUfbg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hakCT-0001KZ-RD; Tue, 11 Jun 2019 17:04:45 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hakBd-0000Xg-5g for linux-arm-kernel@lists.infradead.org; Tue, 11 Jun 2019 17:03:54 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id BE236DA7; Tue, 11 Jun 2019 10:03:52 -0700 (PDT) Received: from filthy-habits.cambridge.arm.com (filthy-habits.cambridge.arm.com [10.1.197.61]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4FB183F73C; Tue, 11 Jun 2019 10:03:51 -0700 (PDT) From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Subject: [PATCH v2 3/9] KVM: arm/arm64: vgic-its: Add MSI-LPI translation cache invalidation Date: Tue, 11 Jun 2019 18:03:30 +0100 Message-Id: <20190611170336.121706-4-marc.zyngier@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190611170336.121706-1-marc.zyngier@arm.com> References: <20190611170336.121706-1-marc.zyngier@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190611_100353_421279_385842E0 X-CRM114-Status: GOOD ( 11.00 ) 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: Suzuki K Poulose , "Raslan, KarimAllah" , Julien Thierry , Christoffer Dall , Eric Auger , James Morse , Zenghui Yu , "Saidi, Ali" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP There's a number of cases where we need to invalidate the caching of translations, so let's add basic support for that. Signed-off-by: Marc Zyngier Reviewed-by: Eric Auger --- virt/kvm/arm/vgic/vgic-its.c | 23 +++++++++++++++++++++++ virt/kvm/arm/vgic/vgic.h | 1 + 2 files changed, 24 insertions(+) diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c index ce9bcddeb7f1..9b6b66204b97 100644 --- a/virt/kvm/arm/vgic/vgic-its.c +++ b/virt/kvm/arm/vgic/vgic-its.c @@ -546,6 +546,29 @@ static unsigned long vgic_mmio_read_its_idregs(struct kvm *kvm, return 0; } +void vgic_its_invalidate_cache(struct kvm *kvm) +{ + struct vgic_dist *dist = &kvm->arch.vgic; + struct vgic_translation_cache_entry *cte; + unsigned long flags; + + raw_spin_lock_irqsave(&dist->lpi_list_lock, flags); + + list_for_each_entry(cte, &dist->lpi_translation_cache, entry) { + /* + * If we hit a NULL entry, there is nothing after this + * point. + */ + if (!cte->irq) + break; + + __vgic_put_lpi_locked(kvm, cte->irq); + cte->irq = NULL; + } + + raw_spin_unlock_irqrestore(&dist->lpi_list_lock, flags); +} + int vgic_its_resolve_lpi(struct kvm *kvm, struct vgic_its *its, u32 devid, u32 eventid, struct vgic_irq **irq) { diff --git a/virt/kvm/arm/vgic/vgic.h b/virt/kvm/arm/vgic/vgic.h index afac2fed7df4..072f810dc441 100644 --- a/virt/kvm/arm/vgic/vgic.h +++ b/virt/kvm/arm/vgic/vgic.h @@ -319,6 +319,7 @@ int vgic_its_resolve_lpi(struct kvm *kvm, struct vgic_its *its, struct vgic_its *vgic_msi_to_its(struct kvm *kvm, struct kvm_msi *msi); void vgic_lpi_translation_cache_init(struct kvm *kvm); void vgic_lpi_translation_cache_destroy(struct kvm *kvm); +void vgic_its_invalidate_cache(struct kvm *kvm); bool vgic_supports_direct_msis(struct kvm *kvm); int vgic_v4_init(struct kvm *kvm);