The patch titled
Subject: arch, mm: wire up memfd_secret system call where relevant
has been added to the -mm tree. Its filename is
arch-mm-wire-up-memfd_secret-system-call-where-relevant.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/arch-mm-wire-up-memfd_secret-system-call-where-relevant.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/arch-mm-wire-up-memfd_secret-system-call-where-relevant.patch
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------------------------------------------------------
From: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Subject: 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@xxxxxxxxxx
Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Acked-by: Palmer Dabbelt <palmerdabbelt@xxxxxxxxxx>
Acked-by: Arnd Bergmann <arnd@xxxxxxxx>
Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx>
Acked-by: David Hildenbrand <david@xxxxxxxxxx>
Acked-by: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Christopher Lameter <cl@xxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Elena Reshetova <elena.reshetova@xxxxxxxxx>
Cc: Hagen Paul Pfeifer <hagen@xxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: James Bottomley <jejb@xxxxxxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Michael Kerrisk <mtk.manpages@xxxxxxxxx>
Cc: Palmer Dabbelt <palmer@xxxxxxxxxxx>
Cc: Paul Walmsley <paul.walmsley@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Rick Edgecombe <rick.p.edgecombe@xxxxxxxxx>
Cc: Roman Gushchin <guro@xxxxxx>
Cc: Shakeel Butt <shakeelb@xxxxxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Tycho Andersen <tycho@xxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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 | 7 ++++++-
scripts/checksyscalls.sh | 4 ++++
7 files changed, 15 insertions(+), 1 deletion(-)
--- a/arch/arm64/include/uapi/asm/unistd.h~arch-mm-wire-up-memfd_secret-system-call-where-relevant
+++ a/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
#include <asm-generic/unistd.h>
--- a/arch/riscv/include/asm/unistd.h~arch-mm-wire-up-memfd_secret-system-call-where-relevant
+++ a/arch/riscv/include/asm/unistd.h
@@ -9,6 +9,7 @@
*/
#define __ARCH_WANT_SYS_CLONE
+#define __ARCH_WANT_MEMFD_SECRET
#include <uapi/asm/unistd.h>
--- a/arch/x86/entry/syscalls/syscall_32.tbl~arch-mm-wire-up-memfd_secret-system-call-where-relevant
+++ a/arch/x86/entry/syscalls/syscall_32.tbl
@@ -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
--- a/arch/x86/entry/syscalls/syscall_64.tbl~arch-mm-wire-up-memfd_secret-system-call-where-relevant
+++ a/arch/x86/entry/syscalls/syscall_64.tbl
@@ -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
--- a/include/linux/syscalls.h~arch-mm-wire-up-memfd_secret-system-call-where-relevant
+++ a/include/linux/syscalls.h
@@ -1050,6 +1050,7 @@ asmlinkage long sys_landlock_create_rule
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
--- a/include/uapi/asm-generic/unistd.h~arch-mm-wire-up-memfd_secret-system-call-where-relevant
+++ a/include/uapi/asm-generic/unistd.h
@@ -873,8 +873,13 @@ __SYSCALL(__NR_landlock_add_rule, sys_la
#define __NR_landlock_restrict_self 446
__SYSCALL(__NR_landlock_restrict_self, sys_landlock_restrict_self)
+#ifdef __ARCH_WANT_MEMFD_SECRET
+#define __NR_memfd_secret 447
+__SYSCALL(__NR_memfd_secret, sys_memfd_secret)
+#endif
+
#undef __NR_syscalls
-#define __NR_syscalls 447
+#define __NR_syscalls 448
/*
* 32 bit systems traditionally used different
--- a/scripts/checksyscalls.sh~arch-mm-wire-up-memfd_secret-system-call-where-relevant
+++ a/scripts/checksyscalls.sh
@@ -40,6 +40,10 @@ cat << EOF
#define __IGNORE_setrlimit /* setrlimit */
#endif
+#ifndef __ARCH_WANT_MEMFD_SECRET
+#define __IGNORE_memfd_secret
+#endif
+
/* Missing flags argument */
#define __IGNORE_renameat /* renameat2 */
_
Patches currently in -mm which might be from rppt@xxxxxxxxxxxxx are
mm-mmzoneh-simplify-is_highmem_idx.patch
docs-procrst-meminfo-briefly-describe-gaps-in-memory-accounting.patch
include-linux-mmzoneh-add-documentation-for-pfn_valid.patch
memblock-update-initialization-of-reserved-pages.patch
arm64-decouple-check-whether-pfn-is-in-linear-map-from-pfn_valid.patch
arm64-drop-pfn_valid_within-and-simplify-pfn_valid.patch
mmap-make-mlock_future_check-global.patch
riscv-kconfig-make-direct-map-manipulation-options-depend-on-mmu.patch
set_memory-allow-querying-whether-set_direct_map_-is-actually-enabled.patch
mm-introduce-memfd_secret-system-call-to-create-secret-memory-areas.patch
pm-hibernate-disable-when-there-are-active-secretmem-users.patch
arch-mm-wire-up-memfd_secret-system-call-where-relevant.patch
secretmem-test-add-basic-selftest-for-memfd_secret2.patch
