From nobody Sat Feb 7 18:15:08 2026 Received: from out-185.mta0.migadu.com (out-185.mta0.migadu.com [91.218.175.185]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 483B93BB47 for ; Wed, 21 Feb 2024 05:43:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.185 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708494212; cv=none; b=UJq65WB7uYXm0IzJTvggq2sytX4SrVfB9Vx15mCFbaU/oYPg75U/Fs95lM1Pls+oYxK17XorP71SorJwUotXcU/cV5Vy2gB9h5VjK0qxlB4TqiN+k+fBV6qbHe32VUUf240eTOU2qdydrteK8DNKUzZVfJ9L299bh5+Sk+lMFPs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708494212; c=relaxed/simple; bh=2nkDTHcHmB33a/QQu7UDTZHWtSxxacimi3tTiZ9a1sQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qXFcI0h8Kid3AswO8iAgnQgGdW1nIz/Mxp4Cn1ELEEfNjmYJpZQcW8sbH9uu2Rvah300aqkoXPAPZuhkBXUuKcVl4PRLpcvgihu3L+tCY800DG+6OI12uKKTPW31HkuJbep3tyuqRbEaGq7hgExbEDGUOoUXsRKF5fG1CBkzdns= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=kWM4CnAI; arc=none smtp.client-ip=91.218.175.185 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="kWM4CnAI" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1708494208; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=8nd2SXFQ1C1LlktYqUUc4CI4OG59iyq71GzSyfZOU20=; b=kWM4CnAIhzzDn6hcA5UWEWtiSn+E/I2Euqe4c3srTEF4gOULTNs5ApWtlcLfPBFH8QZZ7I 3Zvffct7NXAKoZXaEN6FPXMNl+/PinjhM/iFTxpVAUNvJCWvLZv9aJMYYAbWSXFDcfTRsh dCaDPDNwqHphtjV5ajguseu6IlopyMY= From: Oliver Upton To: kvmarm@lists.linux.dev Cc: kvm@vger.kernel.org, Marc Zyngier , James Morse , Suzuki K Poulose , Zenghui Yu , linux-kernel@vger.kernel.org, Eric Auger , Oliver Upton Subject: [PATCH v4 05/10] KVM: arm64: vgic: Get rid of the LPI linked-list Date: Wed, 21 Feb 2024 05:42:48 +0000 Message-ID: <20240221054253.3848076-6-oliver.upton@linux.dev> In-Reply-To: <20240221054253.3848076-1-oliver.upton@linux.dev> References: <20240221054253.3848076-1-oliver.upton@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Migadu-Flow: FLOW_OUT Content-Type: text/plain; charset="utf-8" All readers of LPI configuration have been transitioned to use the LPI xarray. Get rid of the linked-list altogether. Signed-off-by: Oliver Upton --- arch/arm64/kvm/vgic/vgic-init.c | 1 - arch/arm64/kvm/vgic/vgic-its.c | 8 ++------ arch/arm64/kvm/vgic/vgic.c | 1 - include/kvm/arm_vgic.h | 2 -- 4 files changed, 2 insertions(+), 10 deletions(-) diff --git a/arch/arm64/kvm/vgic/vgic-init.c b/arch/arm64/kvm/vgic/vgic-ini= t.c index 411719053107..e25672d6e846 100644 --- a/arch/arm64/kvm/vgic/vgic-init.c +++ b/arch/arm64/kvm/vgic/vgic-init.c @@ -53,7 +53,6 @@ void kvm_vgic_early_init(struct kvm *kvm) { struct vgic_dist *dist =3D &kvm->arch.vgic; =20 - INIT_LIST_HEAD(&dist->lpi_list_head); INIT_LIST_HEAD(&dist->lpi_translation_cache); raw_spin_lock_init(&dist->lpi_list_lock); xa_init_flags(&dist->lpi_xa, XA_FLAGS_LOCK_IRQ); diff --git a/arch/arm64/kvm/vgic/vgic-its.c b/arch/arm64/kvm/vgic/vgic-its.c index b9874dc04608..3d0208162bcd 100644 --- a/arch/arm64/kvm/vgic/vgic-its.c +++ b/arch/arm64/kvm/vgic/vgic-its.c @@ -58,7 +58,6 @@ static struct vgic_irq *vgic_add_lpi(struct kvm *kvm, u32= intid, return ERR_PTR(ret); } =20 - INIT_LIST_HEAD(&irq->lpi_list); INIT_LIST_HEAD(&irq->ap_list); raw_spin_lock_init(&irq->irq_lock); =20 @@ -74,10 +73,8 @@ static struct vgic_irq *vgic_add_lpi(struct kvm *kvm, u3= 2 intid, * There could be a race with another vgic_add_lpi(), so we need to * check that we don't add a second list entry with the same LPI. */ - list_for_each_entry(oldirq, &dist->lpi_list_head, lpi_list) { - if (oldirq->intid !=3D intid) - continue; - + oldirq =3D xa_load(&dist->lpi_xa, intid); + if (oldirq) { /* Someone was faster with adding this LPI, lets use that. */ kfree(irq); irq =3D oldirq; @@ -99,7 +96,6 @@ static struct vgic_irq *vgic_add_lpi(struct kvm *kvm, u32= intid, goto out_unlock; } =20 - list_add_tail(&irq->lpi_list, &dist->lpi_list_head); dist->lpi_list_count++; =20 out_unlock: diff --git a/arch/arm64/kvm/vgic/vgic.c b/arch/arm64/kvm/vgic/vgic.c index 7d17dbc8f5dc..6240faab0127 100644 --- a/arch/arm64/kvm/vgic/vgic.c +++ b/arch/arm64/kvm/vgic/vgic.c @@ -122,7 +122,6 @@ void __vgic_put_lpi_locked(struct kvm *kvm, struct vgic= _irq *irq) if (!kref_put(&irq->refcount, vgic_irq_release)) return; =20 - list_del(&irq->lpi_list); xa_erase(&dist->lpi_xa, irq->intid); dist->lpi_list_count--; =20 diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index 795b35656b54..aeff363e3ba6 100644 --- a/include/kvm/arm_vgic.h +++ b/include/kvm/arm_vgic.h @@ -117,7 +117,6 @@ struct irq_ops { =20 struct vgic_irq { raw_spinlock_t irq_lock; /* Protects the content of the struct */ - struct list_head lpi_list; /* Used to link all LPIs together */ struct list_head ap_list; =20 struct kvm_vcpu *vcpu; /* SGIs and PPIs: The VCPU @@ -277,7 +276,6 @@ struct vgic_dist { /* Protects the lpi_list and the count value below. */ raw_spinlock_t lpi_list_lock; struct xarray lpi_xa; - struct list_head lpi_list_head; int lpi_list_count; =20 /* LPI translation cache */ --=20 2.44.0.rc0.258.g7320e95886-goog