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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0B9C9C25B7E for ; Tue, 28 May 2024 08:54:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=mufjjqipHzBWIckA1+JrfpsQX/ggYeP7cG1Lgb6bYxU=; b=h0KPpY4ohTUt14pFcGv1U3lV0f x39EEsF/V5STcXHruORm1OfYqFAfD93iq3Lkg3pSCAQmTdtWWWP9j8KEGr398gLthC5RrmZbSbUTH 3cCLYHTxLbNxlnNMWR38rCUQ1jiJx7dBhrVDdYUt0ItRCWtCO2Jw+kIZ2PZQIpp5A//x6QDTTMILI 8CGSvYcZNCuoEXH1N8wM30O3g6e6sMVAEh/3P4oPgYb+eqcEDQaEwCGBiFqhVxe/4ieefiMQeY9vd U7JZoTdl3W5vfvLldr9I8qSq68IhwG29ACBCa4W4wt3v1OOWEFezrMih4itqExA4X2k5M2mimzbpI mCNgkr2Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sBsbO-0000000HY4Z-36Mp; Tue, 28 May 2024 08:54:38 +0000 Received: from s3.sipsolutions.net ([2a01:4f8:242:246e::2] helo=sipsolutions.net) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sBsbL-0000000HY3Y-3YSJ for linux-um@lists.infradead.org; Tue, 28 May 2024 08:54:37 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sipsolutions.net; s=mail; h=Content-Transfer-Encoding:MIME-Version: Message-ID:Date:Subject:Cc:To:From:Content-Type:Sender:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-To:Resent-Cc: Resent-Message-ID:In-Reply-To:References; bh=mufjjqipHzBWIckA1+JrfpsQX/ggYeP7cG1Lgb6bYxU=; t=1716886473; x=1718096073; b=aQi8Ws6FgTfK6HOdenl24G+40L65+9qDt3RDyN9t06hh7AoG0ZROAGM9BT/rCfxJG4LRgmyZpOt UHaswgdVpVLRuRFZeL3jJpDtCnJ2wVkB2VbFbdufATVAqjTBRgz0AOm/4mq9lHNOBiP4EHfgSjgyY 2ZMHewAnJxBJpesE5wsNNNA3xcz3cQ5Cyfgsjmo3ctMqlvYfC83Y4URRHwGc+0CeYlt2ucXsO16Hi ujJ7UVFjC+mPsNctFtfStDYg00os5zO4Jy5UgLy5O3yJd7Us82cyMLgYZuV6uql394f2Qw8duX3RB EyOmnL4FipIl/vWbgNR0Qy4JeiNbRUbc1BVA==; Received: by sipsolutions.net with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.97) (envelope-from ) id 1sBsbG-0000000EAlo-1Enk; Tue, 28 May 2024 10:54:30 +0200 From: benjamin@sipsolutions.net To: linux-um@lists.infradead.org Cc: Benjamin Berg Subject: [PATCH 0/5] Increased address space for 64 bit Date: Tue, 28 May 2024 10:54:14 +0200 Message-ID: <20240528085419.1964424-1-benjamin@sipsolutions.net> X-Mailer: git-send-email 2.45.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240528_015436_195289_D8A53746 X-CRM114-Status: UNSURE ( 8.32 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-um@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-um" Errors-To: linux-um-bounces+linux-um=archiver.kernel.org@lists.infradead.org From: Benjamin Berg This patchset fixes a few bugs, adds a new method of discovering the host task size and finally adds four level page table support. All of this means the userspace TASK_SIZE is much larger and in turns permits userspace applications that need a lot of virtual addresses to work fine. One such application is ASAN which uses a fixed address in memory that would otherwise not be addressable. Benjamin Berg (5): um: Fix stub_start address calculation um: Limit TASK_SIZE to the addressable range um: Do a double clone to disable rseq um: Discover host_task_size from envp um: Add 4 level page table support arch/um/Kconfig | 1 + arch/um/include/asm/page.h | 14 +++- arch/um/include/asm/pgalloc.h | 11 ++- arch/um/include/asm/pgtable-4level.h | 119 +++++++++++++++++++++++++++ arch/um/include/asm/pgtable.h | 6 +- arch/um/include/shared/as-layout.h | 2 +- arch/um/include/shared/os.h | 2 +- arch/um/kernel/mem.c | 17 +++- arch/um/kernel/um_arch.c | 14 +++- arch/um/os-Linux/main.c | 9 +- arch/um/os-Linux/skas/process.c | 54 +++++++++++- arch/x86/um/Kconfig | 38 ++++++--- arch/x86/um/os-Linux/task_size.c | 19 ++++- 13 files changed, 274 insertions(+), 32 deletions(-) create mode 100644 arch/um/include/asm/pgtable-4level.h -- 2.45.1