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GET /api/patches/2217899/?format=api
{ "id": 2217899, "url": "http://patchwork.ozlabs.org/api/patches/2217899/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260330211859.19317-7-deller@kernel.org/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260330211859.19317-7-deller@kernel.org>", "list_archive_url": null, "date": "2026-03-30T21:18:53", "name": "[06/11] hw/pci-host/astro: Fix LMMIO DIRECT mappings", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "32562df96bfe6ef54329bf9cf7c8fc869c99dd35", "submitter": { "id": 87076, "url": "http://patchwork.ozlabs.org/api/people/87076/?format=api", "name": "Helge Deller", "email": "deller@kernel.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260330211859.19317-7-deller@kernel.org/mbox/", "series": [ { "id": 498097, "url": "http://patchwork.ozlabs.org/api/series/498097/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=498097", "date": "2026-03-30T21:18:54", "name": "HPPA Patches for qemu-v11", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/498097/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2217899/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2217899/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=gvcOraKC;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists.gnu.org (lists.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fl41P0Q6Mz1xtJ\n\tfor <incoming@patchwork.ozlabs.org>; Tue, 31 Mar 2026 08:21:13 +1100 (AEDT)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1w7K0v-0000ob-IX; Mon, 30 Mar 2026 17:19:13 -0400", "from eggs.gnu.org ([2001:470:142:3::10])\n by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <deller@kernel.org>) id 1w7K0u-0000o6-7T\n for qemu-devel@nongnu.org; Mon, 30 Mar 2026 17:19:12 -0400", "from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <deller@kernel.org>) id 1w7K0s-0003k8-MC\n for qemu-devel@nongnu.org; Mon, 30 Mar 2026 17:19:11 -0400", "from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58])\n by tor.source.kernel.org (Postfix) with ESMTP id 1F2E760154;\n Mon, 30 Mar 2026 21:19:10 +0000 (UTC)", "by smtp.kernel.org (Postfix) with ESMTPSA id D1E09C4CEF7;\n Mon, 30 Mar 2026 21:19:08 +0000 (UTC)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n s=k20201202; t=1774905549;\n bh=LFIUBJijtJ2MlhZjT24k/fC8iFp901WWwmZgzzrJpjE=;\n h=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n b=gvcOraKC0scLrGn9OSkgohj+4Hv1s5mWoYK8FcMcA7yQFLko+yTo7L1jFAJlMrtD2\n dOY0U4cQds8d7nzVqXf/l6RWrEBz7W4cdfDqiAuuxETYRyjjgwLfsiwHfMDbfe93Or\n HYGI4Emb3C7Uj4jfl4djopTxzHnor9BfBerU/zUwtv9Ig9DIiPlfYlVkTHepWP6XX6\n acjy9uWZQUG493w00gWi1pU+cQPRrIa62LxGLoCbi6BqIoqvhYB4rUAx7gL+91f7ox\n ZxA4yW1xlneao+Zv0ibIVP+5RETXytANQYiNUyyw/UWorHJAX+y+kdBnKP/zA77rC2\n 1v0b3QTRYvy7w==", "From": "Helge Deller <deller@kernel.org>", "To": "qemu-devel@nongnu.org", "Cc": "deller@gmx.de,\n\tRichard Henderson <richard.henderson@linaro.org>", "Subject": "[PATCH 06/11] hw/pci-host/astro: Fix LMMIO DIRECT mappings", "Date": "Mon, 30 Mar 2026 23:18:53 +0200", "Message-ID": "<20260330211859.19317-7-deller@kernel.org>", "X-Mailer": "git-send-email 2.53.0", "In-Reply-To": "<20260330211859.19317-1-deller@kernel.org>", "References": "<20260330211859.19317-1-deller@kernel.org>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Received-SPF": "pass client-ip=2600:3c04:e001:324:0:1991:8:25;\n envelope-from=deller@kernel.org; helo=tor.source.kernel.org", "X-Spam_score_int": "-25", "X-Spam_score": "-2.6", "X-Spam_bar": "--", "X-Spam_report": "(-2.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.54,\n DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n 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 <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "From: Helge Deller <deller@gmx.de>\n\nFix the existing code which has the mask wrong.\nImplement the direct mapping via overlapping subregion with priority 3\nto make sure the direct mapping gets precedence over the LMMIO region.\n\nSigned-off-by: Helge Deller <deller@gmx.de>\n---\n hw/pci-host/astro.c | 39 +++++++++++++++++++++++++--------------\n 1 file changed, 25 insertions(+), 14 deletions(-)", "diff": "diff --git a/hw/pci-host/astro.c b/hw/pci-host/astro.c\nindex 4af35ea92f..e1d73258c4 100644\n--- a/hw/pci-host/astro.c\n+++ b/hw/pci-host/astro.c\n@@ -607,9 +607,13 @@ static void adjust_LMMIO_DIRECT_mapping(AstroState *s, unsigned int reg_index)\n MemoryRegion *lmmio_alias;\n unsigned int lmmio_index, map_route;\n hwaddr map_addr;\n- uint32_t map_size;\n+ uint32_t map_size, map_enabled;\n struct ElroyState *elroy;\n \n+ /* each LMMIO may access from 1 MB up to 64 MB */\n+ const unsigned int lmmio_mask = ~(1 * MiB - 1);\n+ const unsigned int lmmio_max_size = 64 * MiB;\n+\n /* pointer to LMMIO_DIRECT entry */\n lmmio_index = reg_index / 3;\n lmmio_alias = &s->lmmio_direct[lmmio_index];\n@@ -622,31 +626,38 @@ static void adjust_LMMIO_DIRECT_mapping(AstroState *s, unsigned int reg_index)\n map_route &= (ELROY_NUM - 1);\n elroy = s->elroy[map_route];\n \n+ /* make sure the lmmio region is initially turned off */\n if (lmmio_alias->enabled) {\n memory_region_set_enabled(lmmio_alias, false);\n }\n \n+ /* do sanity checks and calculate mmio size */\n+ map_enabled = map_addr & 1;\n+ map_addr &= lmmio_mask;\n+ map_size &= lmmio_mask;\n+ map_size = MIN(map_size, lmmio_max_size);\n map_addr = F_EXTEND(map_addr);\n- map_addr &= TARGET_PAGE_MASK;\n- map_size = (~map_size) + 1;\n- map_size &= TARGET_PAGE_MASK;\n \n- /* exit if disabled or zero map size */\n- if (!(map_addr & 1) || !map_size) {\n+ /* exit if disabled or has zero size. */\n+ if (!map_enabled || !map_size) {\n return;\n }\n \n- if (!memory_region_size(lmmio_alias)) {\n+ if (!lmmio_alias->name) {\n+ char lmmio_name[32];\n+ snprintf(lmmio_name, sizeof(lmmio_name),\n+ \"LMMIO-DIRECT-%u\", lmmio_index);\n memory_region_init_alias(lmmio_alias, OBJECT(elroy),\n- \"pci-lmmmio-alias\", &elroy->pci_mmio,\n+ lmmio_name, &elroy->pci_mmio,\n (uint32_t) map_addr, map_size);\n- memory_region_add_subregion(get_system_memory(), map_addr,\n- lmmio_alias);\n- } else {\n- memory_region_set_alias_offset(lmmio_alias, map_addr);\n- memory_region_set_size(lmmio_alias, map_size);\n- memory_region_set_enabled(lmmio_alias, true);\n+ memory_region_add_subregion_overlap(get_system_memory(),\n+ map_addr, lmmio_alias, 3);\n }\n+\n+ memory_region_set_address(lmmio_alias, map_addr);\n+ memory_region_set_alias_offset(lmmio_alias, (uint32_t) map_addr);\n+ memory_region_set_size(lmmio_alias, map_size);\n+ memory_region_set_enabled(lmmio_alias, true);\n }\n \n static MemTxResult astro_chip_read_with_attrs(void *opaque, hwaddr addr,\n", "prefixes": [ "06/11" ] }