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 DC9CBD12D76 for ; Mon, 11 Nov 2024 06:27:33 +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:References:In-Reply-To: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:List-Owner; bh=Wpl1iR+0Y26CWXV/kUmKOepSogFAWZLSfMeJZXKOdEg=; b=DD0MmW3S5zPTGPJHuaUHeksaSF odDAJkNq2WUaBWfdxu530m8lDdgHybfAdb4ukF2rJjeN7RlUBjB2c/hoHEM+6pgJwukjJS2CUIBQO 3xwZaxFB+Q8oLTqmeWjAT0UJRT0GXGYfflf/zttUL+pPDN5GxGUHzPQALoD79ZfZy0KnSziyMj8U3 3gmcPmfmBLN/XRdKDNPrdDND6CLgsDQub9sRV41LjWSoZyuYV7vUF3y3BjC7X7EmrjBJ0nIOAFAzl KdA+V3956VjnxeXKDXbeDm5OoxXuUBIMOK/o4SuAVLCjyTygzii6CzfIfqeuaOEip39ThYJ2q8GoT +rdk28+A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tANtc-0000000GU3w-1WWD; Mon, 11 Nov 2024 06:27:32 +0000 Received: from mail-pl1-x62a.google.com ([2607:f8b0:4864:20::62a]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tANtZ-0000000GU3N-2LhU for linux-um@lists.infradead.org; Mon, 11 Nov 2024 06:27:31 +0000 Received: by mail-pl1-x62a.google.com with SMTP id d9443c01a7336-20c6f492d2dso45363675ad.0 for ; Sun, 10 Nov 2024 22:27:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1731306448; x=1731911248; darn=lists.infradead.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Wpl1iR+0Y26CWXV/kUmKOepSogFAWZLSfMeJZXKOdEg=; b=PQUDv/kgdoXuV6qHa8+BqCPXjj4kccWgerOB4wLHN4aTt/Y0rNaV23Dw/n5qsaCCel YgoU/iXnFfLMzNP6B0YfqwUAKYnTLpHFXOIH5Ds/7nbNIeL+AUz3oWyq1xoQl5MdXvqP pMnWRF8oB5jG/ZRqWoDpQEck+NoRuflCRdnGk29PRuqDMJCHPnuuAvcRDUFuyUjNOC3O AfCLqSaBDSbKXgwECfMKZ7FlViHuLNbm6UZHimdpeXVw3aFbEGYk1nQm0lwmNEBpVTdJ DHDf095vnCT5KyLVwPqd7vyOfBcAaH6fHhR48SIEEZSywa6tb8uGrNmnHrZ9gavG2Opo E4wA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1731306448; x=1731911248; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Wpl1iR+0Y26CWXV/kUmKOepSogFAWZLSfMeJZXKOdEg=; b=qfTeq5alohgEGZ+gY9sFiOj2L46jpNY3+yhttSigmv5Z0G0OfxcuAFuJmFxzrCfroB XPQF6/KndiL0gmQyrvfXG4XImcoUnEeY/km+MApgmPyg3MnTmGI9qDzPy+2BxVj60RIl dN2akJkzmVxc0CO9XsJ9eR3BGdgzmOanmJnQHcI8cmsUPDCPgsjptFOCMUoeFmmXULmJ 2xQdPTHoWNaOeLpMGZNwwRpXkRXe4DE0YXHygZHio1ksvUwakLRdVVDqdo+0EinInq1d UeKdje6sFk1op8bdY248qahDqE1Wt6sigtSYBLH2Bin5mVONSbEERMtK6LouVfqhSeFV 2UKA== X-Gm-Message-State: AOJu0YyhHzPp4cXT6q52aYS+SkthqJPdyUiZTHe3LrRul2Q8FrKaTkIv 68xTdmEcD5i/fTTwu7ofZZDfLMNsYw9UUnfWQsGwyPiutWNm6OwJ X-Google-Smtp-Source: AGHT+IGm7o3j4RK+QcZOMtBG5aASUeD8QAzGXbyt3GZ0wLfpgUdltMXARApa6Q5bGEnOpv+ryHsFjg== X-Received: by 2002:a17:902:cec7:b0:20b:b40b:3454 with SMTP id d9443c01a7336-21183327a44mr164016045ad.0.1731306448122; Sun, 10 Nov 2024 22:27:28 -0800 (PST) Received: from ikb-h07-29-noble.in.iijlab.net ([202.214.97.5]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-21177dc7e0fsm69226435ad.21.2024.11.10.22.27.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 10 Nov 2024 22:27:27 -0800 (PST) Received: by ikb-h07-29-noble.in.iijlab.net (Postfix, from userid 1010) id 3E27EDBA912; Mon, 11 Nov 2024 15:27:25 +0900 (JST) From: Hajime Tazaki To: linux-um@lists.infradead.org Cc: thehajime@gmail.com, ricarkol@google.com, Liam.Howlett@oracle.com Subject: [RFC PATCH v2 00/13] nommu UML Date: Mon, 11 Nov 2024 15:27:00 +0900 Message-ID: X-Mailer: git-send-email 2.43.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241110_222729_626426_8202AB32 X-CRM114-Status: GOOD ( 15.59 ) 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 This is a series of patches of nommu arch addition to UML. It would be nice to ask comments/opinions on this. There are still several limitations/issues which we already found; here is the list of those issues. - prompt configured with /etc/profile is broken (variables are not expanded, ${HOSTNAME%%.*}:$PWD#) - there are no mechanism implemented to cache for mapped memory of exec(2) thus, always read files from filesystem upon every exec, which makes slow on some benchmark (lmbench). -- Hajime RFC v2: - base branch is now uml/linux.git instead of torvalds/linux.git. - reorganize the patch series to clean up - fixed various coding styles issues - clean up exec code path [07/13] - fixed the crash/SIGSEGV case on userspace programs [10/13] - add seccomp filter to limit syscall caller address [06/13] - detect fsgsbase availability with sigsetjmp/siglongjmp [08/13] - removes unrelated changes - removes unneeded ifndef CONFIG_MMU - convert UML_CONFIG_MMU to CONFIG_MMU as using uml/linux.git - proposed a patch of maple-tree issue (resolving a limitation in RFC v1) https://lore.kernel.org/linux-mm/20241108222834.3625217-1-thehajime@gmail.com/ RFC: - https://lore.kernel.org/linux-um/cover.1729770373.git.thehajime@gmail.com/ Hajime Tazaki (13): fs: binfmt_elf_efpic: add architecture hook elf_arch_finalize_exec x86/um: nommu: elf loader for fdpic um: nommu: memory handling x86/um: nommu: syscall handling x86/um: nommu: syscall translation by zpoline um: nommu: prevent host syscalls from userspace by seccomp filter x86/um: nommu: process/thread handling um: nommu: configure fs register on host syscall invocation x86/um/vdso: nommu: vdso memory update x86/um: nommu: signal handling um: change machine name for uname output um: nommu: add documentation of nommu UML um: nommu: plug nommu code into build system Documentation/virt/uml/nommu-uml.rst | 221 +++++++++++++++++++++++ arch/um/Kconfig | 14 +- arch/um/Makefile | 6 + arch/um/configs/x86_64_nommu_defconfig | 64 +++++++ arch/um/include/asm/Kbuild | 1 + arch/um/include/asm/futex.h | 4 + arch/um/include/asm/mmu.h | 8 + arch/um/include/asm/mmu_context.h | 13 +- arch/um/include/asm/ptrace-generic.h | 6 + arch/um/include/asm/tlbflush.h | 22 +++ arch/um/include/asm/uaccess.h | 7 +- arch/um/include/shared/kern_util.h | 3 + arch/um/include/shared/os.h | 14 ++ arch/um/kernel/Makefile | 3 +- arch/um/kernel/mem.c | 12 +- arch/um/kernel/physmem.c | 6 + arch/um/kernel/process.c | 33 +++- arch/um/kernel/skas/Makefile | 4 +- arch/um/kernel/trap.c | 14 ++ arch/um/kernel/um_arch.c | 4 + arch/um/os-Linux/Makefile | 5 +- arch/um/os-Linux/cpu.c | 50 ++++++ arch/um/os-Linux/internal.h | 5 + arch/um/os-Linux/main.c | 5 + arch/um/os-Linux/process.c | 94 +++++++++- arch/um/os-Linux/signal.c | 18 +- arch/um/os-Linux/skas/process.c | 4 + arch/um/os-Linux/start_up.c | 3 + arch/um/os-Linux/util.c | 3 +- arch/x86/um/Makefile | 18 ++ arch/x86/um/asm/elf.h | 11 +- arch/x86/um/asm/module.h | 24 --- arch/x86/um/asm/processor.h | 12 ++ arch/x86/um/do_syscall_64.c | 108 ++++++++++++ arch/x86/um/entry_64.S | 108 ++++++++++++ arch/x86/um/shared/sysdep/syscalls_64.h | 6 + arch/x86/um/signal.c | 37 +++- arch/x86/um/syscalls_64.c | 69 ++++++++ arch/x86/um/vdso/um_vdso.c | 20 +++ arch/x86/um/vdso/vma.c | 14 ++ arch/x86/um/zpoline.c | 223 ++++++++++++++++++++++++ fs/Kconfig.binfmt | 2 +- fs/binfmt_elf_fdpic.c | 10 ++ 43 files changed, 1262 insertions(+), 46 deletions(-) create mode 100644 Documentation/virt/uml/nommu-uml.rst create mode 100644 arch/um/configs/x86_64_nommu_defconfig create mode 100644 arch/um/os-Linux/cpu.c delete mode 100644 arch/x86/um/asm/module.h create mode 100644 arch/x86/um/do_syscall_64.c create mode 100644 arch/x86/um/entry_64.S create mode 100644 arch/x86/um/zpoline.c -- 2.43.0