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GET /api/1.2/patches/831238/?format=api
{ "id": 831238, "url": "http://patchwork.ozlabs.org/api/1.2/patches/831238/?format=api", "web_url": "http://patchwork.ozlabs.org/project/glibc/patch/1509101470-7881-29-git-send-email-Dave.Martin@arm.com/", "project": { "id": 41, "url": "http://patchwork.ozlabs.org/api/1.2/projects/41/?format=api", "name": "GNU C Library", "link_name": "glibc", "list_id": "libc-alpha.sourceware.org", "list_email": "libc-alpha@sourceware.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<1509101470-7881-29-git-send-email-Dave.Martin@arm.com>", "list_archive_url": null, "date": "2017-10-27T10:51:10", "name": "[RFC,v4,28/28] arm64/sve: signal: Include SVE when computing AT_MINSIGSTKSZ", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "d16b14f6fb6ec764d778264ff67bfdbea70b3de2", "submitter": { "id": 26612, "url": "http://patchwork.ozlabs.org/api/1.2/people/26612/?format=api", "name": "Dave Martin", "email": "Dave.Martin@arm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/glibc/patch/1509101470-7881-29-git-send-email-Dave.Martin@arm.com/mbox/", "series": [ { "id": 10555, "url": "http://patchwork.ozlabs.org/api/1.2/series/10555/?format=api", "web_url": "http://patchwork.ozlabs.org/project/glibc/list/?series=10555", "date": "2017-10-27T10:50:42", "name": "ARM Scalable Vector Extension (SVE)", "version": 4, "mbox": "http://patchwork.ozlabs.org/series/10555/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/831238/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/831238/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<libc-alpha-return-86470-incoming=patchwork.ozlabs.org@sourceware.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": [ "patchwork-incoming@bilbo.ozlabs.org", "mailing list libc-alpha@sourceware.org" ], "Authentication-Results": [ "ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=sourceware.org\n\t(client-ip=209.132.180.131; helo=sourceware.org;\n\tenvelope-from=libc-alpha-return-86470-incoming=patchwork.ozlabs.org@sourceware.org;\n\treceiver=<UNKNOWN>)", "ozlabs.org; dkim=pass (1024-bit key;\n\tsecure) header.d=sourceware.org header.i=@sourceware.org\n\theader.b=\"vHYkAzHN\"; dkim-atps=neutral", "sourceware.org; auth=none" ], "Received": [ "from sourceware.org (server1.sourceware.org [209.132.180.131])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256\n\tbits)) (No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3yNgmZ70LLz9rxj\n\tfor <incoming@patchwork.ozlabs.org>;\n\tFri, 27 Oct 2017 21:56:46 +1100 (AEDT)", "(qmail 122152 invoked by alias); 27 Oct 2017 10:52:17 -0000", "(qmail 122122 invoked by uid 89); 27 Oct 2017 10:52:17 -0000" ], "DomainKey-Signature": "a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id\n\t:list-unsubscribe:list-subscribe:list-archive:list-post\n\t:list-help:sender:from:to:cc:subject:date:message-id:in-reply-to\n\t:references:mime-version:content-type:content-transfer-encoding;\n\tq=dns; s=default; b=GqriJrmtl5u4tplqgep+/1Cc/ySMh4rEiWwOS00KBCg\n\tVOZD6YLXse5LTkH/A5l/S+DWb/mDlc8BC+GihH2TtcEpPJkNFo+deHCJfHVvJ9Z6\n\tXPK2fQKr5D9rna04J7WIZmx7plKt+GkSevr6HWvPLQTr7o7VE4WosSiXOQmWOrmc\n\t=", "DKIM-Signature": "v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id\n\t:list-unsubscribe:list-subscribe:list-archive:list-post\n\t:list-help:sender:from:to:cc:subject:date:message-id:in-reply-to\n\t:references:mime-version:content-type:content-transfer-encoding;\n\ts=default; bh=IXsZPzGuCrvrMznfJJTVy60iehQ=; b=vHYkAzHNXrF5OZEa/\n\tIoA4zxv6+k34RZKdxogppU67QjF19cR5FSJUr8hqQUidSyghdQlb2LwPxk1a08Oc\n\tNxFWHpQI/5shp3th0sX1prM8RkTK1SmMrkNXGYYSy2gBLXW9jkrsOSAKaQUCfLMv\n\t8C8GJVG4na3wfSJfN6L1nsUbxU=", "Mailing-List": "contact libc-alpha-help@sourceware.org; run by ezmlm", "Precedence": "bulk", "List-Id": "<libc-alpha.sourceware.org>", "List-Unsubscribe": "<mailto:libc-alpha-unsubscribe-incoming=patchwork.ozlabs.org@sourceware.org>", "List-Subscribe": "<mailto:libc-alpha-subscribe@sourceware.org>", "List-Archive": "<http://sourceware.org/ml/libc-alpha/>", "List-Post": "<mailto:libc-alpha@sourceware.org>", "List-Help": "<mailto:libc-alpha-help@sourceware.org>,\n\t<http://sourceware.org/ml/#faqs>", "Sender": "libc-alpha-owner@sourceware.org", "X-Virus-Found": "No", "X-Spam-SWARE-Status": "No, score=-26.9 required=5.0 tests=BAYES_00, GIT_PATCH_0,\n\tGIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, RP_MATCHES_RCVD,\n\tSPF_PASS autolearn=ham version=3.3.2 spammy=", "X-HELO": "foss.arm.com", "From": "Dave Martin <Dave.Martin@arm.com>", "To": "linux-arm-kernel@lists.infradead.org", "Cc": "Catalin Marinas <catalin.marinas@arm.com>, Will Deacon\n\t<will.deacon@arm.com>, \tArd Biesheuvel <ard.biesheuvel@linaro.org>,\n\t=?utf-8?q?Alex_Benn=C3=A9?= =?utf-8?q?e?= <alex.bennee@linaro.org>,\n\tSzabolcs Nagy <szabolcs.nagy@arm.com>, Okamoto Takayuki\n\t<tokamoto@jp.fujitsu.com>, \tkvmarm@lists.cs.columbia.edu,\n\tlibc-alpha@sourceware.org, \tlinux-arch@vger.kernel.org", "Subject": "[RFC PATCH v4 28/28] arm64/sve: signal: Include SVE when computing\n\tAT_MINSIGSTKSZ", "Date": "Fri, 27 Oct 2017 11:51:10 +0100", "Message-Id": "<1509101470-7881-29-git-send-email-Dave.Martin@arm.com>", "In-Reply-To": "<1509101470-7881-1-git-send-email-Dave.Martin@arm.com>", "References": "<1509101470-7881-1-git-send-email-Dave.Martin@arm.com>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8", "Content-Transfer-Encoding": "8bit" }, "content": "The SVE context block in the signal frame needs to be considered\ntoo when computing the maximum possible signal frame size.\n\nBecause the size of this block depends on the vector length, this\npatch computes the size based not on the thread's current vector\nlength but instead on the maximum possible vector length: this\ndetermines the maximum size of SVE context block that can be\nobserved in any signal frame for the lifetime of the process.\n\nSigned-off-by: Dave Martin <Dave.Martin@arm.com>\nCc: Ard Biesheuvel <ard.biesheuvel@linaro.org>\nCc: Alex Bennée <alex.bennee@linaro.org>\n---\n arch/arm64/kernel/signal.c | 14 ++++++++++++--\n 1 file changed, 12 insertions(+), 2 deletions(-)", "diff": "diff --git a/arch/arm64/kernel/signal.c b/arch/arm64/kernel/signal.c\nindex ecae147..260b67f 100644\n--- a/arch/arm64/kernel/signal.c\n+++ b/arch/arm64/kernel/signal.c\n@@ -595,8 +595,18 @@ static int setup_sigframe_layout(struct rt_sigframe_user_layout *user,\n \tif (system_supports_sve()) {\n \t\tunsigned int vq = 0;\n \n-\t\tif (test_thread_flag(TIF_SVE))\n-\t\t\tvq = sve_vq_from_vl(current->thread.sve_vl);\n+\t\tif (add_all || test_thread_flag(TIF_SVE)) {\n+\t\t\tint vl = sve_max_vl;\n+\n+\t\t\tif (!add_all)\n+\t\t\t\tvl = current->thread.sve_vl;\n+\n+\t\t\t/* Fail safe if something wasn't initialised */\n+\t\t\tif (WARN_ON(!sve_vl_valid(vl)))\n+\t\t\t\tvl = SVE_VL_MIN;\n+\n+\t\t\tvq = sve_vq_from_vl(vl);\n+\t\t}\n \n \t\terr = sigframe_alloc(user, &user->sve_offset,\n \t\t\t\t SVE_SIG_CONTEXT_SIZE(vq));\n", "prefixes": [ "RFC", "v4", "28/28" ] }