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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 27D1FFF885E for ; Mon, 27 Apr 2026 08:54:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=f5Y9tCp87R5OEATyVvxp5xmQHQzwSbqjDEuvyjPvH2k=; b=MEvQ+u/AtSQhgxNP7lv/KK2kpm rJhpU7vAlzrFIgWeYU4yBU/AsyIIqKJ+giUT6s+aoOlEmrDLafxk93s620GS3S97JyOSadtaiGpdu 7MEz6BAfQQ0jj5OkdxkjXX6yiwo8qo4UMkCURDOym2ITjtfvKnIiujLdkupCfvfxhJgcIb9H1E7vd KXc0Uvv7bXjFGXZGN0KBHa7kQVKkSJ9MFRUKMiAoiIabOtXA/vofAi/v/txv8gbKjC48Hm5zZtmZN u1g8d32cuLu7J2lECH31jXSraVWX/a794W5ckP4CT94q2U+TpTp8rLlkuwdSPtlnWX7oFJ3HV2thr eoDEv4Eg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wHHjG-0000000GUkM-3m8q; Mon, 27 Apr 2026 08:54:10 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wHHjG-0000000GUk0-2MyB for linux-arm-kernel@lists.infradead.org; Mon, 27 Apr 2026 08:54:10 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 09C7860581; Mon, 27 Apr 2026 08:54:10 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 233AAC19425; Mon, 27 Apr 2026 08:54:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777280049; bh=Bo7WyqkDkmCNfV2kNVREL1QfabEb/FOXWjg40u50nEo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KAoPPgkhwpgN1Eg4Z1cqoyhOog3uD8niofmCtPhbELIDud647rXoZjo5QB+ihkZA/ zUYjwTfj/hBQ5aZnlWrgVIWRBiGYc2PHXFZdFxQ+vkRUaASfjXW2lyLBdb08LBCjBq Q+nZccSEmUCeAu76CJR462hTAwxBO8i0ZGMIj1XlvmfA5Vf0FtWpQbBUrp9TFrHrFC 1MBpKKoiu+GCC39QmraCM4PT7f6nfGawbelRaquNJoOGVNz2ZHX2JC98LcHTRh350k GKZ1F0G5SoagHIioNTF3c/OdoJpAsqm/joUxGUJKchN1TgcPRi2sHCQX99PursRBoe Az4YHikYFWg6g== From: "Aneesh Kumar K.V (Arm)" To: linux-coco@lists.linux.dev, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: "Aneesh Kumar K.V (Arm)" , Alexey Kardashevskiy , Catalin Marinas , Dan Williams , Jason Gunthorpe , Joerg Roedel , Jonathan Cameron , Marc Zyngier , Nicolin Chen , Pranjal Shrivastava , Robin Murphy , Samuel Ortiz , Steven Price , Suzuki K Poulose , Will Deacon , Xu Yilun Subject: [RFC PATCH v4 02/16] iommu/arm-smmu-v3: Save the programmed MSI message in msi_desc Date: Mon, 27 Apr 2026 14:23:30 +0530 Message-ID: <20260427085344.941627-3-aneesh.kumar@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260427085344.941627-1-aneesh.kumar@kernel.org> References: <20260427085344.941627-1-aneesh.kumar@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Cache the MSI message in desc->msg from arm_smmu_write_msi_msg(). The realm support code later reads the MSI address and data through irq_get_msi_desc(), so it needs the descriptor to reflect the last programmed message. This matches the caching done by __pci_write_msi_msg(). Signed-off-by: Aneesh Kumar K.V (Arm) --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index d5b9ab95beea..17fd99887aab 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -4012,6 +4012,9 @@ static void arm_smmu_write_msi_msg(struct msi_desc *desc, struct msi_msg *msg) if (smmu->features & ARM_SMMU_FEAT_PRI) max_config_index = PRIQ_MSI_INDEX; + /* save the programmed msi message details */ + desc->msg = *msg; + /* Don't try to config for Realm interrupts. */ if (desc->msi_index > max_config_index) return; -- 2.43.0