From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-187.mta0.migadu.com (out-187.mta0.migadu.com [91.218.175.187]) (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 39D7B137C34 for ; Fri, 16 Feb 2024 18:42:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.187 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708108934; cv=none; b=gYB5PrI7Kb2HH+vd24V2QjtI1GDKA/EgMPZlgYDc5ML82AFL6yCx+BE3b9zCNUOVORka65pu7oUpqSWhqhGybrAKsr4YQ1ggFlD8Akav5WA/3d5uS9oVVc//kt2yfjw8KULk97Cx8DGNUFaagEou4fb845kVCI4i+jm0MyZhjzY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708108934; c=relaxed/simple; bh=RxF9w33LgnXLTuXV5O9RLdzK9dXUqE5MSbsOmdxxwVA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sJj5YXaw9qCsT7MBn4vqJ7KjX8eS+rhzVbf3utQ2CLi1LI2Gb0TlimvCIfsJ+KH1KfhloLE2O/IOi7JxyBRdmE1S87O+JBjUQXphHkiyGZ2NyzZ1nTFTa0mkJuruyHQ+UNIa8HjUKNk7LYxdwvYMbTMPJcffvfyyUd21N9vJ6zU= 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=ZLbfNeSQ; arc=none smtp.client-ip=91.218.175.187 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="ZLbfNeSQ" 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=1708108931; 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=p7/gBwWxFbIZwFC+F2czZFaZoLMKZvcePyaMRonjua4=; b=ZLbfNeSQ+vvMysguJereiuL6HX9y7yTkwAqfZDi01alhaBPsgpmVjE5rDkwu1Yn8Htvw9v fzVoJNNRJHANhXohgMOEmDPfTxdaCfZD8ONhfVqCE7ZJVf2ocgo0jDD1DRg4a2cUdGSBHp 8wDn/MKghWUzK463T149MUkCPXm0D6Y= 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, Oliver Upton Subject: [PATCH v3 03/10] KVM: arm64: vgic-v3: Iterate the xarray to find pending LPIs Date: Fri, 16 Feb 2024 18:41:46 +0000 Message-ID: <20240216184153.2714504-4-oliver.upton@linux.dev> In-Reply-To: <20240216184153.2714504-1-oliver.upton@linux.dev> References: <20240216184153.2714504-1-oliver.upton@linux.dev> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT Start walking the LPI xarray to find pending LPIs in preparation for the removal of the LPI linked-list. Note that the 'basic' iterator is chosen here as each iteration needs to drop the xarray read lock (RCU) as reads/writes to guest memory can potentially block. Signed-off-by: Oliver Upton --- arch/arm64/kvm/vgic/vgic-v3.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/vgic/vgic-v3.c b/arch/arm64/kvm/vgic/vgic-v3.c index 9465d3706ab9..4ea3340786b9 100644 --- a/arch/arm64/kvm/vgic/vgic-v3.c +++ b/arch/arm64/kvm/vgic/vgic-v3.c @@ -380,6 +380,7 @@ int vgic_v3_save_pending_tables(struct kvm *kvm) struct vgic_irq *irq; gpa_t last_ptr = ~(gpa_t)0; bool vlpi_avail = false; + unsigned long index; int ret = 0; u8 val; @@ -396,7 +397,7 @@ int vgic_v3_save_pending_tables(struct kvm *kvm) vlpi_avail = true; } - list_for_each_entry(irq, &dist->lpi_list_head, lpi_list) { + xa_for_each(&dist->lpi_xa, index, irq) { int byte_offset, bit_nr; struct kvm_vcpu *vcpu; gpa_t pendbase, ptr; -- 2.44.0.rc0.258.g7320e95886-goog