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GET /api/1.2/patches/2234554/?format=api
{ "id": 2234554, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2234554/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/patch/20260507-b4-mmu-unmap-fixes-v3-2-aac7726d87d5@linaro.org/", "project": { "id": 18, "url": "http://patchwork.ozlabs.org/api/1.2/projects/18/?format=api", "name": "U-Boot", "link_name": "uboot", "list_id": "u-boot.lists.denx.de", "list_email": "u-boot@lists.denx.de", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260507-b4-mmu-unmap-fixes-v3-2-aac7726d87d5@linaro.org>", "list_archive_url": null, "date": "2026-05-07T19:58:09", "name": "[v3,2/4] armv8: mmu: teach the pagetable dumper to show explicit FAULT maps", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "c3f3b4a4db2d17e41a093d60ba97678bd8a994a4", "submitter": { "id": 90679, "url": "http://patchwork.ozlabs.org/api/1.2/people/90679/?format=api", "name": "Casey Connolly", "email": "casey.connolly@linaro.org" }, "delegate": { "id": 3651, "url": "http://patchwork.ozlabs.org/api/1.2/users/3651/?format=api", "username": "trini", "first_name": "Tom", "last_name": "Rini", "email": "trini@ti.com" }, "mbox": "http://patchwork.ozlabs.org/project/uboot/patch/20260507-b4-mmu-unmap-fixes-v3-2-aac7726d87d5@linaro.org/mbox/", "series": [ { "id": 503261, "url": "http://patchwork.ozlabs.org/api/1.2/series/503261/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/list/?series=503261", "date": "2026-05-07T19:58:07", "name": "armv8: mmu: fix region unmapping and optimise set_one_region()", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/503261/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2234554/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2234554/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<u-boot-bounces@lists.denx.de>", "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=linaro.org header.i=@linaro.org header.a=rsa-sha256\n header.s=google header.b=kACYKokt;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=85.214.62.61; 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charset=\"utf-8\"", "Content-Transfer-Encoding": "7bit", "Message-Id": "<20260507-b4-mmu-unmap-fixes-v3-2-aac7726d87d5@linaro.org>", "References": "<20260507-b4-mmu-unmap-fixes-v3-0-aac7726d87d5@linaro.org>", "In-Reply-To": "<20260507-b4-mmu-unmap-fixes-v3-0-aac7726d87d5@linaro.org>", "To": "u-boot@lists.denx.de", "Cc": "Tom Rini <trini@konsulko.com>, Anshul Dalal <anshuld@ti.com>,\n Casey Connolly <casey.connolly@linaro.org>,\n Ilias Apalodimas <ilias.apalodimas@linaro.org>, Dhruva Gole <d-gole@ti.com>,\n Mark Kettenis <kettenis@openbsd.org>,\n Patrice Chotard <patrice.chotard@foss.st.com>,\n Sumit Garg <sumit.garg@kernel.org>", "X-Mailer": "b4 0.16-dev", "X-Developer-Signature": "v=1; a=openpgp-sha256; l=1793;\n i=casey.connolly@linaro.org; h=from:subject:message-id;\n bh=Fu7kjOhau2q2gnn/gGhvZs7871UvGg5NlOdRHBQT9FY=;\n b=owGbwMvMwCFYaeA6f6eBkTjjabUkhsw/724zpJWtO9B0a9XsH8ef1lRF5R5cn/JOw/yMnWOjz\n UrlzC3HO0pZGAQ5GGTFFFnETyyzbFp72V5j+4ILMHNYmcCGcHEKwETyrBj+qe748jtSKV9BziTS\n UTpjS1ueebrwpaPmX6XmWbJcyiwMZ/jvMjHOuLI502zj5deuSldvPbX+fZtzvXFepvW2qKv3Khv\n ZAA==", "X-Developer-Key": "i=casey.connolly@linaro.org; a=openpgp;\n fpr=83B24DA7FE145076BC38BB250CD904EB673A7C47", "X-BeenThere": "u-boot@lists.denx.de", "X-Mailman-Version": "2.1.39", "Precedence": "list", "List-Id": "U-Boot discussion <u-boot.lists.denx.de>", "List-Unsubscribe": "<https://lists.denx.de/options/u-boot>,\n <mailto:u-boot-request@lists.denx.de?subject=unsubscribe>", "List-Archive": "<https://lists.denx.de/pipermail/u-boot/>", "List-Post": "<mailto:u-boot@lists.denx.de>", "List-Help": "<mailto:u-boot-request@lists.denx.de?subject=help>", "List-Subscribe": "<https://lists.denx.de/listinfo/u-boot>,\n <mailto:u-boot-request@lists.denx.de?subject=subscribe>", "Errors-To": "u-boot-bounces@lists.denx.de", "Sender": "\"U-Boot\" <u-boot-bounces@lists.denx.de>", "X-Virus-Scanned": "clamav-milter 0.103.8 at phobos.denx.de", "X-Virus-Status": "Clean" }, "content": "When a region is explicitly unmapped (like with\nmmu_change_region_attr(.... PTE_TYPE_FAULT)) the address translation\nstill remains but won't be used since the region is marked invalid.\nPrint these regions when we dump the pagetable to help with debugging.\n\nSigned-off-by: Casey Connolly <casey.connolly@linaro.org>\n---\n arch/arm/cpu/armv8/cache_v8.c | 8 ++++++--\n 1 file changed, 6 insertions(+), 2 deletions(-)", "diff": "diff --git a/arch/arm/cpu/armv8/cache_v8.c b/arch/arm/cpu/armv8/cache_v8.c\nindex 368c622cd18e..36d337378fcd 100644\n--- a/arch/arm/cpu/armv8/cache_v8.c\n+++ b/arch/arm/cpu/armv8/cache_v8.c\n@@ -533,9 +533,9 @@ static void __pagetable_walk(u64 addr, u64 tcr, int level, pte_walker_cb_t cb, v\n \n \t\tif (exit)\n \t\t\treturn;\n \n-\t\tif (pte_type(&pte) == PTE_TYPE_FAULT)\n+\t\tif (!pte)\n \t\t\tcontinue;\n \n \t\tattrs = pte & ALL_ATTRS;\n \t\t/* If we're currently inside a block or set of pages */\n@@ -572,9 +572,9 @@ static void __pagetable_walk(u64 addr, u64 tcr, int level, pte_walker_cb_t cb, v\n \n \t\t\t/* Go down a level */\n \t\t\t__pagetable_walk(_addr, tcr, level + 1, cb, priv);\n \t\t\tstate[level] = WALKER_STATE_START;\n-\t\t} else if (pte_type(&pte) == PTE_TYPE_BLOCK || pte_type(&pte) == PTE_TYPE_PAGE) {\n+\t\t} else {\n \t\t\t/* We foud a block or page, start walking */\n \t\t\tentry_start = pte;\n \t\t\tstate[level] = WALKER_STATE_REGION;\n \t\t}\n@@ -707,8 +707,12 @@ static bool pagetable_print_entry(u64 start_attrs, u64 end, int va_bits, int lev\n {\n \tu64 _addr = start_attrs & GENMASK_ULL(va_bits, PAGE_SHIFT);\n \tint indent = va_bits < 39 ? level - 1 : level;\n \n+\t/* Ignore empty blocks */\n+\tif (!start_attrs)\n+\t\treturn false;\n+\n \tprintf(\"%*s\", indent * 2, \"\");\n \tif (PTE_IS_TABLE(start_attrs, level))\n \t\tprintf(\"[%#016llx]%19s\", _addr, \"\");\n \telse\n", "prefixes": [ "v3", "2/4" ] }