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GET /api/patches/800953/?format=api
{ "id": 800953, "url": "http://patchwork.ozlabs.org/api/patches/800953/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20170813013346.14002-4-npiggin@gmail.com/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/", "list_archive_url_format": "https://lore.kernel.org/linuxppc-dev/{}/", "commit_url_format": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}" }, "msgid": "<20170813013346.14002-4-npiggin@gmail.com>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20170813013346.14002-4-npiggin@gmail.com/", "date": "2017-08-13T01:33:41", "name": "[v2,4/9] powerpc/64s/radix: Remove bolted-SLB address limit for per-cpu stacks", "commit_ref": "d55071905ee1719094c66dd3c40e2a9ef5c65eaf", "pull_url": null, "state": "accepted", "archived": false, "hash": "d7336329b37245bf3b59ced01b7ca7be2a835a4b", "submitter": { "id": 69518, "url": "http://patchwork.ozlabs.org/api/people/69518/?format=api", "name": "Nicholas Piggin", "email": "npiggin@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20170813013346.14002-4-npiggin@gmail.com/mbox/", "series": [], "comments": "http://patchwork.ozlabs.org/api/patches/800953/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/800953/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "patchwork-incoming@ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Delivered-To": [ "patchwork-incoming@ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Received": [ "from lists.ozlabs.org (lists.ozlabs.org [103.22.144.68])\n\t(using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3xVM1W5tDbz9s7C\n\tfor <patchwork-incoming@ozlabs.org>;\n\tSun, 13 Aug 2017 11:42:23 +1000 (AEST)", "from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\tby lists.ozlabs.org (Postfix) with ESMTP id 3xVM1W4js3zDrJG\n\tfor <patchwork-incoming@ozlabs.org>;\n\tSun, 13 Aug 2017 11:42:23 +1000 (AEST)", "from mail-pf0-x242.google.com (mail-pf0-x242.google.com\n\t[IPv6:2607:f8b0:400e:c00::242])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128\n\tbits)) (No client certificate requested)\n\tby lists.ozlabs.org (Postfix) with ESMTPS id 3xVLrJ4kc3zDrDB\n\tfor <linuxppc-dev@lists.ozlabs.org>;\n\tSun, 13 Aug 2017 11:34:24 +1000 (AEST)", "by mail-pf0-x242.google.com with SMTP id t86so6802044pfe.1\n\tfor <linuxppc-dev@lists.ozlabs.org>;\n\tSat, 12 Aug 2017 18:34:24 -0700 (PDT)", "from roar.local0.net (203-219-56-202.tpgi.com.au. [203.219.56.202])\n\tby smtp.gmail.com with ESMTPSA id\n\tu69sm7776237pfa.70.2017.08.12.18.34.19\n\t(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);\n\tSat, 12 Aug 2017 18:34:21 -0700 (PDT)" ], "Authentication-Results": [ "ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"OGAYF6qR\"; dkim-atps=neutral", "lists.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"OGAYF6qR\"; dkim-atps=neutral", "lists.ozlabs.org; dkim=pass (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"OGAYF6qR\"; dkim-atps=neutral" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025;\n\th=from:to:cc:subject:date:message-id:in-reply-to:references;\n\tbh=UvXK2jn0KSAbHQ0HpJfrbAUhqYitgu1narAb4X+rxlk=;\n\tb=OGAYF6qRGciYpfvnbi8lfVl9INAkaGJ4eJ20ovfBlA9++pByLReTRHQgMl7RBy8aFW\n\tvtumpybLK/IFexTaf5Xk/42H/WO4AGyDZDmtGbPltng9zvIOrOQ1OsT8xUG2rqYmVKSe\n\tlbWzoo4biGGcTOY7JAIv2Z5CLC0VL11vDXyPtrOsQ7/VV/Lk10sBhUpRpy/Qd+abe2L7\n\tT+bxyjoeNlMCq+bcU+PDI+09Tw4YeT6EnJBx0hq1Izs+QUdYYGVcxCAIs0VR7ttaI0lL\n\t3q0bUfNoldzNlVK8AI4XOiqJuaDn9WqtNkKnjWyquFqcLR05rtch7WYsbdvcYGc+A2CJ\n\t1IKg==", "X-Google-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=1e100.net; s=20161025;\n\th=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to\n\t:references;\n\tbh=UvXK2jn0KSAbHQ0HpJfrbAUhqYitgu1narAb4X+rxlk=;\n\tb=dQczNnW91jrvOcAbUK7+sDwGW99Lv5ySwL0opuqgfAI7ejvzggSJ6xmRyHQbbebg7T\n\t+jWr2gHTSdQyx7UNuPBntVhGX1HmpXCtYvttbC7XMHD3ccryn6FNsd1RUD9zqMT3TM0U\n\tCNBTbQSM4HFfgX7G+1yLHrL2OgidAGNP+rUPLIGb69yRnDNWoLYx4S6oWzB+cn13x0Dm\n\t9McFU2pfmRR5XhvwhJewPrJbZywdx5AUnQ2wt0KPxuEO9c10duIhTM74w2xctyh5o5Ps\n\tb2C9iMqKwso036tIPm4ETLENEqvzVMcxmw4T+oT04UNaHQYoV4ngNztMpZdvCIH3acgk\n\t2YmQ==", "X-Gm-Message-State": "AHYfb5gwQE+NSu0ARG5dn+sv2L+FUXcVi8TT23d8w6rc7XWmns6Wj1ww\n\tBmHaRj65NMUsPymG", "X-Received": "by 10.98.252.204 with SMTP id\n\te195mr20797394pfh.265.1502588062419; \n\tSat, 12 Aug 2017 18:34:22 -0700 (PDT)", "From": "Nicholas Piggin <npiggin@gmail.com>", "To": "linuxppc-dev@lists.ozlabs.org", "Subject": "[PATCH v2 4/9] powerpc/64s/radix: Remove bolted-SLB address limit\n\tfor per-cpu stacks", "Date": "Sun, 13 Aug 2017 11:33:41 +1000", "Message-Id": "<20170813013346.14002-4-npiggin@gmail.com>", "X-Mailer": "git-send-email 2.13.3", "In-Reply-To": "<20170812113416.15978-1-npiggin@gmail.com>", "References": "<20170812113416.15978-1-npiggin@gmail.com>", "X-BeenThere": "linuxppc-dev@lists.ozlabs.org", "X-Mailman-Version": "2.1.23", "Precedence": "list", "List-Id": "Linux on PowerPC Developers Mail List\n\t<linuxppc-dev.lists.ozlabs.org>", "List-Unsubscribe": "<https://lists.ozlabs.org/options/linuxppc-dev>,\n\t<mailto:linuxppc-dev-request@lists.ozlabs.org?subject=unsubscribe>", "List-Archive": "<http://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev-request@lists.ozlabs.org?subject=help>", "List-Subscribe": "<https://lists.ozlabs.org/listinfo/linuxppc-dev>,\n\t<mailto:linuxppc-dev-request@lists.ozlabs.org?subject=subscribe>", "Cc": "kvm-ppc@vger.kernel.org, Nicholas Piggin <npiggin@gmail.com>", "Errors-To": "linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org", "Sender": "\"Linuxppc-dev\"\n\t<linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org>" }, "content": "Radix MMU does not take SLB or TLB interrupts when accessing kernel\nlinear address. Remove this restriction for radix mode.\n\nSigned-off-by: Nicholas Piggin <npiggin@gmail.com>\n---\n arch/powerpc/kernel/setup_64.c | 11 ++++++++---\n 1 file changed, 8 insertions(+), 3 deletions(-)", "diff": "diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c\nindex af23d4b576ec..7393bac3c7f4 100644\n--- a/arch/powerpc/kernel/setup_64.c\n+++ b/arch/powerpc/kernel/setup_64.c\n@@ -564,6 +564,9 @@ static __init u64 safe_stack_limit(void)\n \t/* Other BookE, we assume the first GB is bolted */\n \treturn 1ul << 30;\n #else\n+\tif (early_radix_enabled())\n+\t\treturn ULONG_MAX;\n+\n \t/* BookS, the first segment is bolted */\n \tif (mmu_has_feature(MMU_FTR_1T_SEGMENT))\n \t\treturn 1UL << SID_SHIFT_1T;\n@@ -578,7 +581,8 @@ void __init irqstack_early_init(void)\n \n \t/*\n \t * Interrupt stacks must be in the first segment since we\n-\t * cannot afford to take SLB misses on them.\n+\t * cannot afford to take SLB misses on them. They are not\n+\t * accessed in realmode.\n \t */\n \tfor_each_possible_cpu(i) {\n \t\tsoftirq_ctx[i] = (struct thread_info *)\n@@ -649,8 +653,9 @@ void __init emergency_stack_init(void)\n \t * aligned.\n \t *\n \t * Since we use these as temporary stacks during secondary CPU\n-\t * bringup, we need to get at them in real mode. This means they\n-\t * must also be within the RMO region.\n+\t * bringup, machine check, system reset, and HMI, we need to get\n+\t * at them in real mode. This means they must also be within the RMO\n+\t * region.\n \t *\n \t * The IRQ stacks allocated elsewhere in this file are zeroed and\n \t * initialized in kernel/irq.c. These are initialized here in order\n", "prefixes": [ "v2", "4/9" ] }