From nobody Sun Apr 12 07:11:09 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1772042896; cv=none; d=zohomail.com; s=zohoarc; b=S/QtyBpdMGnJ6G1mwV2/2KV7QX15/rwzfZyxrfX3kQ4Lxkyn4HvUFLGH7Tl8UhCDeSTBiTY5lyxedhzJi1Dtn6SGoSWqSP+1YT93H7sdFmBU8DFmPY6lObbigHDFrSO/S+e9rK6XG6t/51aAqHMr8N7O4riNCkrEwD71ULL3NZ4= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1772042896; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Reply-To:Reply-To:References:Sender:Subject:Subject:To:To:Message-Id; bh=4L1zmjVLftBPG2oB91HgTaPG2Gx6YO+zvxqr74Qu+R8=; b=GL0OPCrL3pkGyl5B7dgGFC21buCftwc83SNKMVEcmAoz6NAPbaWjQI4+QSWJdCQ+aoYblT3i4NEAzCEtdAko0QOdtXwsYEsSG4knHw4Nr2VPgTZcpnKGcOGqnRYSnD4l73pp2znIbI4IH5IoYSYfDWJgo5FKmOKb8h1faEK3ABo= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1772042896583904.1066414704916; Wed, 25 Feb 2026 10:08:16 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vvJIn-0000i3-Qa; Wed, 25 Feb 2026 13:08:01 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vvJIm-0000hI-0g for qemu-devel@nongnu.org; Wed, 25 Feb 2026 13:08:00 -0500 Received: from frasgout.his.huawei.com ([185.176.79.56]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vvJIk-0001w1-GE for qemu-devel@nongnu.org; Wed, 25 Feb 2026 13:07:59 -0500 Received: from mail.maildlp.com (unknown [172.18.224.83]) by frasgout.his.huawei.com (SkyGuard) with ESMTPS id 4fLjH71JByzJ467g; Thu, 26 Feb 2026 02:07:31 +0800 (CST) Received: from dubpeml500005.china.huawei.com (unknown [7.214.145.207]) by mail.maildlp.com (Postfix) with ESMTPS id BE20940086; Thu, 26 Feb 2026 02:07:54 +0800 (CST) Received: from a2303103017.china.huawei.com (10.203.177.99) by dubpeml500005.china.huawei.com (7.214.145.207) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Wed, 25 Feb 2026 18:07:53 +0000 To: CC: , , , , , , , , , , , , , , Subject: [PATCH v5 1/3] hw/cxl: Use HPA in cxl_cfmws_find_device() rather than offset in window. Date: Wed, 25 Feb 2026 18:07:16 +0000 Message-ID: <20260225180718.480-2-alireza.sanaee@huawei.com> X-Mailer: git-send-email 2.51.0.windows.2 In-Reply-To: <20260225180718.480-1-alireza.sanaee@huawei.com> References: <20260225180718.480-1-alireza.sanaee@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.203.177.99] X-ClientProxiedBy: lhrpeml500012.china.huawei.com (7.191.174.4) To dubpeml500005.china.huawei.com (7.214.145.207) Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=185.176.79.56; envelope-from=alireza.sanaee@huawei.com; helo=frasgout.his.huawei.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.734, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.78, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-to: Alireza Sanaee From: Alireza Sanaee via qemu development Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1772042898917158500 Content-Type: text/plain; charset="utf-8" This function will shortly be used to help find if there is a route to a device, serving an HPA, under a particular fixed memory window. Rather than having that new use case subtract the base address in the caller, only to add it again in cxl_cfmws_find_device(), push the responsibility for calculating the HPA to the caller. This also reduces the inconsistency in the meaning of the hwaddr addr parameter between this function and the calls made within it that access the HDM decoders that operating on HPA. Reviewed-by: Jonathan Cameron Signed-off-by: Alireza Sanaee --- hw/cxl/cxl-host.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/hw/cxl/cxl-host.c b/hw/cxl/cxl-host.c index f3479b1991..a94b893e99 100644 --- a/hw/cxl/cxl-host.c +++ b/hw/cxl/cxl-host.c @@ -168,9 +168,6 @@ static PCIDevice *cxl_cfmws_find_device(CXLFixedWindow = *fw, hwaddr addr) bool target_found; PCIDevice *rp, *d; =20 - /* Address is relative to memory region. Convert to HPA */ - addr +=3D fw->base; - rb_index =3D (addr / cxl_decode_ig(fw->enc_int_gran)) % fw->num_target= s; hb =3D PCI_HOST_BRIDGE(fw->target_hbs[rb_index]->cxl_host_bridge); if (!hb || !hb->bus || !pci_bus_is_cxl(hb->bus)) { @@ -254,7 +251,7 @@ static MemTxResult cxl_read_cfmws(void *opaque, hwaddr = addr, uint64_t *data, CXLFixedWindow *fw =3D opaque; PCIDevice *d; =20 - d =3D cxl_cfmws_find_device(fw, addr); + d =3D cxl_cfmws_find_device(fw, addr + fw->base); if (d =3D=3D NULL) { *data =3D 0; /* Reads to invalid address return poison */ @@ -271,7 +268,7 @@ static MemTxResult cxl_write_cfmws(void *opaque, hwaddr= addr, CXLFixedWindow *fw =3D opaque; PCIDevice *d; =20 - d =3D cxl_cfmws_find_device(fw, addr); + d =3D cxl_cfmws_find_device(fw, addr + fw->base); if (d =3D=3D NULL) { /* Writes to invalid address are silent */ return MEMTX_OK; --=20 2.43.0