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=-17.0 required=3.0 tests=BAYES_00,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 6E4B1C83012 for ; Thu, 3 Dec 2020 06:31:48 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id EB9FC208A9 for ; Thu, 3 Dec 2020 06:31:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EB9FC208A9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 676E86B007B; Thu, 3 Dec 2020 01:31:47 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 6240D6B007D; Thu, 3 Dec 2020 01:31:47 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5146A6B007E; Thu, 3 Dec 2020 01:31:47 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0216.hostedemail.com [216.40.44.216]) by kanga.kvack.org (Postfix) with ESMTP id 3B1186B007B for ; Thu, 3 Dec 2020 01:31:47 -0500 (EST) Received: from smtpin22.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 06DB01EE6 for ; Thu, 3 Dec 2020 06:31:47 +0000 (UTC) X-FDA: 77551000254.22.cause93_2417370273b9 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin22.hostedemail.com (Postfix) with ESMTP id D562A18038E60 for ; Thu, 3 Dec 2020 06:31:46 +0000 (UTC) X-HE-Tag: cause93_2417370273b9 X-Filterd-Recvd-Size: 6668 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf32.hostedemail.com (Postfix) with ESMTP for ; Thu, 3 Dec 2020 06:31:46 +0000 (UTC) From: Mike Rapoport Authentication-Results:mail.kernel.org; dkim=permerror (bad message/signature format) To: Andrew Morton Cc: Alexander Viro , Andy Lutomirski , Arnd Bergmann , Borislav Petkov , Catalin Marinas , Christopher Lameter , Dan Williams , Dave Hansen , David Hildenbrand , Elena Reshetova , "H. Peter Anvin" , Ingo Molnar , James Bottomley , "Kirill A. Shutemov" , Matthew Wilcox , Mark Rutland , Mike Rapoport , Mike Rapoport , Michael Kerrisk , Palmer Dabbelt , Paul Walmsley , Peter Zijlstra , Rick Edgecombe , Roman Gushchin , Shakeel Butt , Shuah Khan , Thomas Gleixner , Tycho Andersen , Will Deacon , linux-api@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-nvdimm@lists.01.org, linux-riscv@lists.infradead.org, x86@kernel.org, Palmer Dabbelt Subject: [PATCH v14 09/10] arch, mm: wire up memfd_secret system call were relevant Date: Thu, 3 Dec 2020 08:29:48 +0200 Message-Id: <20201203062949.5484-10-rppt@kernel.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201203062949.5484-1-rppt@kernel.org> References: <20201203062949.5484-1-rppt@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Mike Rapoport Wire up memfd_secret system call on architectures that define ARCH_HAS_SET_DIRECT_MAP, namely arm64, risc-v and x86. Signed-off-by: Mike Rapoport Acked-by: Palmer Dabbelt Acked-by: Arnd Bergmann --- arch/arm64/include/uapi/asm/unistd.h | 1 + arch/riscv/include/asm/unistd.h | 1 + arch/x86/entry/syscalls/syscall_32.tbl | 1 + arch/x86/entry/syscalls/syscall_64.tbl | 1 + include/linux/syscalls.h | 1 + include/uapi/asm-generic/unistd.h | 6 +++++- mm/secretmem.c | 3 +++ scripts/checksyscalls.sh | 4 ++++ 8 files changed, 17 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/uapi/asm/unistd.h b/arch/arm64/include/ua= pi/asm/unistd.h index f83a70e07df8..ce2ee8f1e361 100644 --- a/arch/arm64/include/uapi/asm/unistd.h +++ b/arch/arm64/include/uapi/asm/unistd.h @@ -20,5 +20,6 @@ #define __ARCH_WANT_SET_GET_RLIMIT #define __ARCH_WANT_TIME32_SYSCALLS #define __ARCH_WANT_SYS_CLONE3 +#define __ARCH_WANT_MEMFD_SECRET =20 #include diff --git a/arch/riscv/include/asm/unistd.h b/arch/riscv/include/asm/uni= std.h index 977ee6181dab..6c316093a1e5 100644 --- a/arch/riscv/include/asm/unistd.h +++ b/arch/riscv/include/asm/unistd.h @@ -9,6 +9,7 @@ */ =20 #define __ARCH_WANT_SYS_CLONE +#define __ARCH_WANT_MEMFD_SECRET =20 #include =20 diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/sysc= alls/syscall_32.tbl index c52ab1c4a755..109e6681b8fa 100644 --- a/arch/x86/entry/syscalls/syscall_32.tbl +++ b/arch/x86/entry/syscalls/syscall_32.tbl @@ -446,3 +446,4 @@ 439 i386 faccessat2 sys_faccessat2 440 i386 process_madvise sys_process_madvise 441 i386 watch_mount sys_watch_mount +442 i386 memfd_secret sys_memfd_secret diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/sysc= alls/syscall_64.tbl index f3270a9ef467..742cf17d7725 100644 --- a/arch/x86/entry/syscalls/syscall_64.tbl +++ b/arch/x86/entry/syscalls/syscall_64.tbl @@ -363,6 +363,7 @@ 439 common faccessat2 sys_faccessat2 440 common process_madvise sys_process_madvise 441 common watch_mount sys_watch_mount +442 common memfd_secret sys_memfd_secret =20 # # Due to a historical design error, certain syscalls are numbered differ= ently diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 6d55324363ab..f9d93fbf9b69 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -1010,6 +1010,7 @@ asmlinkage long sys_pidfd_send_signal(int pidfd, in= t sig, asmlinkage long sys_pidfd_getfd(int pidfd, int fd, unsigned int flags); asmlinkage long sys_watch_mount(int dfd, const char __user *path, unsigned int at_flags, int watch_fd, int watch_id); +asmlinkage long sys_memfd_secret(unsigned long flags); =20 /* * Architecture-specific system calls diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic= /unistd.h index 5df46517260e..51151888f330 100644 --- a/include/uapi/asm-generic/unistd.h +++ b/include/uapi/asm-generic/unistd.h @@ -861,9 +861,13 @@ __SYSCALL(__NR_faccessat2, sys_faccessat2) __SYSCALL(__NR_process_madvise, sys_process_madvise) #define __NR_watch_mount 441 __SYSCALL(__NR_watch_mount, sys_watch_mount) +#ifdef __ARCH_WANT_MEMFD_SECRET +#define __NR_memfd_secret 442 +__SYSCALL(__NR_memfd_secret, sys_memfd_secret) +#endif =20 #undef __NR_syscalls -#define __NR_syscalls 442 +#define __NR_syscalls 443 =20 /* * 32 bit systems traditionally used different diff --git a/mm/secretmem.c b/mm/secretmem.c index 7236f4d9458a..b8a32954ac68 100644 --- a/mm/secretmem.c +++ b/mm/secretmem.c @@ -415,6 +415,9 @@ static int __init secretmem_setup(char *str) unsigned long reserved_size; int err; =20 + if (!can_set_direct_map()) + return 0; + reserved_size =3D memparse(str, NULL); if (!reserved_size) return 0; diff --git a/scripts/checksyscalls.sh b/scripts/checksyscalls.sh index a18b47695f55..b7609958ee36 100755 --- a/scripts/checksyscalls.sh +++ b/scripts/checksyscalls.sh @@ -40,6 +40,10 @@ cat << EOF #define __IGNORE_setrlimit /* setrlimit */ #endif =20 +#ifndef __ARCH_WANT_MEMFD_SECRET +#define __IGNORE_memfd_secret +#endif + /* Missing flags argument */ #define __IGNORE_renameat /* renameat2 */ =20 --=20 2.28.0