From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4E894C433E6 for ; Thu, 18 Mar 2021 17:09:43 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DC1FC64EF2 for ; Thu, 18 Mar 2021 17:09:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DC1FC64EF2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:Cc:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ftLofCj6qsP+N/iT86AXSWbdC+ZNJwbfEC5nIJETGx8=; b=RrqordNdbaummhis7JnWMBif8 bowtd5KvDgxNQzhZhvqf6sDWdYWUNiZEPPng7snM+mKXCP1cfKhFbAZe8pomyirEtyQge7JEKW+Qt NxeUiA0yEJr4GwVFvjNGJjUVW5SuNYs5ro5SAXLRpxht+7O0Vf7pYa7n7DQFMBuwHM7/jBlWWn64W p9QCeWYm88sfrrdLfiRwiXnlw6PPUIvBX5R46j6wIurnAZLuUm/BqFB4Olce9SdXVjcux6W+tpf2f P976JSe7XgGibQLz0we2DfQHzLdWpGP0evmHatmLj0O4RFXLcgbzpjl1YpRzPB3tAty6htTsI4soo SFj+iSJkg==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lMw86-005eoC-U9; Thu, 18 Mar 2021 17:08:15 +0000 Received: from mail.kernel.org ([198.145.29.99]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lMw7l-005em1-H5 for linux-arm-kernel@lists.infradead.org; Thu, 18 Mar 2021 17:07:56 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id C169764F65; Thu, 18 Mar 2021 17:07:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1616087272; bh=QV+ylgGMyvFNN4XLoOA3cBhI3xsb9WXSQI9SpW6MJ7g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=U94FTmJf0sroIOfO6WKT5k7/9nzy5t0ycJY08KZOCmDoGuwmHR2l1D4wKMWjKIFEV WV2RntM/47Dpfb6n8NyAyLcbR07lE6dMpHPPcCo7WWy53QqBJGwYg/+/W4ed/SCk87 A5YmO0jTZd5RjfYKqz3eAQiP/+N37EBWRjmbxONWROu3XXIYthUYxnbls9KiNZjNWl BpF2TpI3O1rtIWH6hVFAPG9cRV+Y5XpPy9vAWhxC2plUBQUtpdLJMDyqD0j2m1QccV Y4sGyabJHSNW4ldedrLYpGz2uBUYeYjXtTAnO/+OmhMl4pIpJzWNvua/vtGqtvYRx4 LFADBHCa5116A== From: Will Deacon To: linux-arm-kernel@lists.infradead.org Cc: kernel-team@android.com, Will Deacon , Catalin Marinas , Mark Rutland , Marc Zyngier , Vincenzo Frascino , Russell King Subject: [PATCH 3/5] arm64: compat: Allow signal page to be remapped Date: Thu, 18 Mar 2021 17:07:36 +0000 Message-Id: <20210318170738.7756-4-will@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210318170738.7756-1-will@kernel.org> References: <20210318170738.7756-1-will@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210318_170754_617261_5EA597C3 X-CRM114-Status: GOOD ( 10.52 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org For compatability with 32-bit Arm, allow the compat signal page to be remapped via mremap(). Signed-off-by: Will Deacon --- arch/arm64/kernel/vdso.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm64/kernel/vdso.c b/arch/arm64/kernel/vdso.c index 421411981dc3..16bf0b46fb70 100644 --- a/arch/arm64/kernel/vdso.c +++ b/arch/arm64/kernel/vdso.c @@ -271,6 +271,14 @@ enum aarch32_map { static struct page *aarch32_vectors_page __ro_after_init; static struct page *aarch32_sig_page __ro_after_init; +static int aarch32_sigpage_mremap(const struct vm_special_mapping *sm, + struct vm_area_struct *new_vma) +{ + current->mm->context.sigpage = (void *)new_vma->vm_start; + + return 0; +} + static struct vm_special_mapping aarch32_vdso_maps[] = { [AA32_MAP_VECTORS] = { .name = "[vectors]", /* ABI */ @@ -279,6 +287,7 @@ static struct vm_special_mapping aarch32_vdso_maps[] = { [AA32_MAP_SIGPAGE] = { .name = "[sigpage]", /* ABI */ .pages = &aarch32_sig_page, + .mremap = aarch32_sigpage_mremap, }, [AA32_MAP_VVAR] = { .name = "[vvar]", -- 2.31.0.rc2.261.g7f71774620-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel