Commit 7bb7f2ac authored Jul 07, 2021 by Mike Rapoport Committed by Linus Torvalds Jul 08, 2021

arch, mm: wire up memfd_secret system call where relevant

Wire up memfd_secret system call on architectures that define
ARCH_HAS_SET_DIRECT_MAP, namely arm64, risc-v and x86.

Link: https://lkml.kernel.org/r/20210518072034.31572-7-rppt@kernel.org


Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Palmer Dabbelt <palmerdabbelt@google.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Christopher Lameter <cl@linux.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Elena Reshetova <elena.reshetova@intel.com>
Cc: Hagen Paul Pfeifer <hagen@jauu.net>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rick Edgecombe <rick.p.edgecombe@intel.com>
Cc: Roman Gushchin <guro@fb.com>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tycho Andersen <tycho@tycho.ws>
Cc: Will Deacon <will@kernel.org>
Cc: kernel test robot <lkp@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 9a436f8f

arch/arm64/include/uapi/asm/unistd.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -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

		#include <asm-generic/unistd.h>

arch/riscv/include/asm/unistd.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -9,6 +9,7 @@
		*/

		#define __ARCH_WANT_SYS_CLONE
		#define __ARCH_WANT_MEMFD_SECRET

		#include <uapi/asm/unistd.h>

arch/x86/entry/syscalls/syscall_32.tbl

+1 −0

Original line number	Diff line number	Diff line
		@@ -451,3 +451,4 @@
		444 i386 landlock_create_ruleset sys_landlock_create_ruleset
		445 i386 landlock_add_rule sys_landlock_add_rule
		446 i386 landlock_restrict_self sys_landlock_restrict_self
		447 i386 memfd_secret sys_memfd_secret

arch/x86/entry/syscalls/syscall_64.tbl

+1 −0

Original line number	Diff line number	Diff line
		@@ -368,6 +368,7 @@
		444 common landlock_create_ruleset sys_landlock_create_ruleset
		445 common landlock_add_rule sys_landlock_add_rule
		446 common landlock_restrict_self sys_landlock_restrict_self
		447 common memfd_secret sys_memfd_secret

		#
		# Due to a historical design error, certain syscalls are numbered differently

include/linux/syscalls.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -1050,6 +1050,7 @@ asmlinkage long sys_landlock_create_ruleset(const struct landlock_ruleset_attr _
		asmlinkage long sys_landlock_add_rule(int ruleset_fd, enum landlock_rule_type rule_type,
		const void __user *rule_attr, __u32 flags);
		asmlinkage long sys_landlock_restrict_self(int ruleset_fd, __u32 flags);
		asmlinkage long sys_memfd_secret(unsigned int flags);

		/*
		* Architecture-specific system calls