* [PATCH] loongarch: wire up memfd_secret system call
@ 2026-01-09 5:10 Lain Fearyncess Yang
2026-01-09 6:45 ` Arnd Bergmann
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Lain Fearyncess Yang @ 2026-01-09 5:10 UTC (permalink / raw)
To: Huacai Chen, WANG Xuerui
Cc: Kexy Biscuit, Mingcong Bai, Lain "Fearyncess" Yang,
Andrew Morton, David Hildenbrand, Lorenzo Stoakes,
Liam R. Howlett, Vlastimil Babka, Mike Rapoport,
Suren Baghdasaryan, Michal Hocko, Shuah Khan, Paul Walmsley,
Palmer Dabbelt, Albert Ou, Alexandre Ghiti, Arnd Bergmann,
Jiaxun Yang, loongarch, linux-kernel, linux-mm, linux-kselftest,
linux-riscv
From: "Lain \"Fearyncess\" Yang" <fearyncess@aosc.io>
LoongArch supports ARCH_HAS_SET_DIRECT_MAP, therefore wire up the
memfd_secret system call, which depends on it.
Signed-off-by: Lain "Fearyncess" Yang <fearyncess@aosc.io>
---
arch/loongarch/include/asm/unistd.h | 1 +
arch/loongarch/kernel/Makefile.syscalls | 6 +++---
tools/testing/selftests/mm/Makefile | 2 +-
3 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/arch/loongarch/include/asm/unistd.h b/arch/loongarch/include/asm/unistd.h
index e2c0f3d86c7bd..e7649c1582482 100644
--- a/arch/loongarch/include/asm/unistd.h
+++ b/arch/loongarch/include/asm/unistd.h
@@ -10,5 +10,6 @@
#define __ARCH_WANT_NEW_STAT
#define __ARCH_WANT_SYS_CLONE
+#define __ARCH_WANT_MEMFD_SECRET
#define NR_syscalls (__NR_syscalls)
diff --git a/arch/loongarch/kernel/Makefile.syscalls b/arch/loongarch/kernel/Makefile.syscalls
index cd46c2b69c7fd..6360381baf931 100644
--- a/arch/loongarch/kernel/Makefile.syscalls
+++ b/arch/loongarch/kernel/Makefile.syscalls
@@ -1,5 +1,5 @@
# SPDX-License-Identifier: GPL-2.0
-# No special ABIs on loongarch so far
-syscall_abis_32 +=
-syscall_abis_64 +=
+# Add memfd_secret explictly for la64 and la32
+syscall_abis_32 += memfd_secret
+syscall_abis_64 += memfd_secret
diff --git a/tools/testing/selftests/mm/Makefile b/tools/testing/selftests/mm/Makefile
index eaf9312097f7b..79582438efc4d 100644
--- a/tools/testing/selftests/mm/Makefile
+++ b/tools/testing/selftests/mm/Makefile
@@ -72,7 +72,7 @@ TEST_GEN_FILES += madv_populate
TEST_GEN_FILES += map_fixed_noreplace
TEST_GEN_FILES += map_hugetlb
TEST_GEN_FILES += map_populate
-ifneq (,$(filter $(ARCH),arm64 riscv riscv64 x86 x86_64))
+ifneq (,$(filter $(ARCH),arm64 riscv riscv64 x86 x86_64 loongarch32 loongarch64))
TEST_GEN_FILES += memfd_secret
endif
TEST_GEN_FILES += migration
--
2.52.0
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] loongarch: wire up memfd_secret system call
2026-01-09 5:10 [PATCH] loongarch: wire up memfd_secret system call Lain Fearyncess Yang
@ 2026-01-09 6:45 ` Arnd Bergmann
2026-01-09 8:21 ` Mike Rapoport
2026-01-09 13:28 ` David Hildenbrand (Red Hat)
2 siblings, 0 replies; 4+ messages in thread
From: Arnd Bergmann @ 2026-01-09 6:45 UTC (permalink / raw)
To: Lain Fearyncess Yang, Huacai Chen, WANG Xuerui
Cc: Kexy Biscuit, Mingcong Bai, Andrew Morton,
David Hildenbrand (Red Hat),
Lorenzo Stoakes, Liam R. Howlett, Vlastimil Babka, Mike Rapoport,
Suren Baghdasaryan, Michal Hocko, shuah, Paul Walmsley,
Palmer Dabbelt, Albert Ou, Alexandre Ghiti, Jiaxun Yang,
loongarch, linux-kernel, linux-mm, linux-kselftest, linux-riscv
On Fri, Jan 9, 2026, at 06:10, Lain Fearyncess Yang wrote:
> From: "Lain \"Fearyncess\" Yang" <fearyncess@aosc.io>
>
> LoongArch supports ARCH_HAS_SET_DIRECT_MAP, therefore wire up the
> memfd_secret system call, which depends on it.
>
> Signed-off-by: Lain "Fearyncess" Yang <fearyncess@aosc.io>
> ---
Acked-by: Arnd Bergmann <arnd@arndb.de>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] loongarch: wire up memfd_secret system call
2026-01-09 5:10 [PATCH] loongarch: wire up memfd_secret system call Lain Fearyncess Yang
2026-01-09 6:45 ` Arnd Bergmann
@ 2026-01-09 8:21 ` Mike Rapoport
2026-01-09 13:28 ` David Hildenbrand (Red Hat)
2 siblings, 0 replies; 4+ messages in thread
From: Mike Rapoport @ 2026-01-09 8:21 UTC (permalink / raw)
To: Lain Fearyncess Yang
Cc: Huacai Chen, WANG Xuerui, Kexy Biscuit, Mingcong Bai,
Andrew Morton, David Hildenbrand, Lorenzo Stoakes,
Liam R. Howlett, Vlastimil Babka, Suren Baghdasaryan,
Michal Hocko, Shuah Khan, Paul Walmsley, Palmer Dabbelt,
Albert Ou, Alexandre Ghiti, Arnd Bergmann, Jiaxun Yang,
loongarch, linux-kernel, linux-mm, linux-kselftest, linux-riscv
On Fri, Jan 09, 2026 at 01:10:51PM +0800, Lain Fearyncess Yang wrote:
> From: "Lain \"Fearyncess\" Yang" <fearyncess@aosc.io>
>
> LoongArch supports ARCH_HAS_SET_DIRECT_MAP, therefore wire up the
> memfd_secret system call, which depends on it.
LoongArch version of set_memory* does not support splitting of leaf PMD
entries. Does LoongArch always use PTE-level mappings in the direct map?
> Signed-off-by: Lain "Fearyncess" Yang <fearyncess@aosc.io>
> ---
> arch/loongarch/include/asm/unistd.h | 1 +
> arch/loongarch/kernel/Makefile.syscalls | 6 +++---
> tools/testing/selftests/mm/Makefile | 2 +-
> 3 files changed, 5 insertions(+), 4 deletions(-)
--
Sincerely yours,
Mike.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] loongarch: wire up memfd_secret system call
2026-01-09 5:10 [PATCH] loongarch: wire up memfd_secret system call Lain Fearyncess Yang
2026-01-09 6:45 ` Arnd Bergmann
2026-01-09 8:21 ` Mike Rapoport
@ 2026-01-09 13:28 ` David Hildenbrand (Red Hat)
2 siblings, 0 replies; 4+ messages in thread
From: David Hildenbrand (Red Hat) @ 2026-01-09 13:28 UTC (permalink / raw)
To: Lain Fearyncess Yang, Huacai Chen, WANG Xuerui
Cc: Kexy Biscuit, Mingcong Bai, Andrew Morton, Lorenzo Stoakes,
Liam R. Howlett, Vlastimil Babka, Mike Rapoport,
Suren Baghdasaryan, Michal Hocko, Shuah Khan, Paul Walmsley,
Palmer Dabbelt, Albert Ou, Alexandre Ghiti, Arnd Bergmann,
Jiaxun Yang, loongarch, linux-kernel, linux-mm, linux-kselftest,
linux-riscv
On 1/9/26 06:10, Lain Fearyncess Yang wrote:
> From: "Lain \"Fearyncess\" Yang" <fearyncess@aosc.io>
>
> LoongArch supports ARCH_HAS_SET_DIRECT_MAP, therefore wire up the
> memfd_secret system call, which depends on it.
>
> Signed-off-by: Lain "Fearyncess" Yang <fearyncess@aosc.io>
> ---
> arch/loongarch/include/asm/unistd.h | 1 +
> arch/loongarch/kernel/Makefile.syscalls | 6 +++---
> tools/testing/selftests/mm/Makefile | 2 +-
> 3 files changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/arch/loongarch/include/asm/unistd.h b/arch/loongarch/include/asm/unistd.h
> index e2c0f3d86c7bd..e7649c1582482 100644
> --- a/arch/loongarch/include/asm/unistd.h
> +++ b/arch/loongarch/include/asm/unistd.h
> @@ -10,5 +10,6 @@
>
> #define __ARCH_WANT_NEW_STAT
> #define __ARCH_WANT_SYS_CLONE
> +#define __ARCH_WANT_MEMFD_SECRET
>
> #define NR_syscalls (__NR_syscalls)
> diff --git a/arch/loongarch/kernel/Makefile.syscalls b/arch/loongarch/kernel/Makefile.syscalls
> index cd46c2b69c7fd..6360381baf931 100644
> --- a/arch/loongarch/kernel/Makefile.syscalls
> +++ b/arch/loongarch/kernel/Makefile.syscalls
> @@ -1,5 +1,5 @@
> # SPDX-License-Identifier: GPL-2.0
>
> -# No special ABIs on loongarch so far
> -syscall_abis_32 +=
> -syscall_abis_64 +=
> +# Add memfd_secret explictly for la64 and la32
> +syscall_abis_32 += memfd_secret
> +syscall_abis_64 += memfd_secret
> diff --git a/tools/testing/selftests/mm/Makefile b/tools/testing/selftests/mm/Makefile
> index eaf9312097f7b..79582438efc4d 100644
> --- a/tools/testing/selftests/mm/Makefile
> +++ b/tools/testing/selftests/mm/Makefile
> @@ -72,7 +72,7 @@ TEST_GEN_FILES += madv_populate
> TEST_GEN_FILES += map_fixed_noreplace
> TEST_GEN_FILES += map_hugetlb
> TEST_GEN_FILES += map_populate
> -ifneq (,$(filter $(ARCH),arm64 riscv riscv64 x86 x86_64))
> +ifneq (,$(filter $(ARCH),arm64 riscv riscv64 x86 x86_64 loongarch32 loongarch64))
For the core-mm bits
Acked-by: David Hildenbrand (Red Hat) <david@kernel.org>
--
Cheers
David
^ permalink raw reply [flat|nested] 4+ messages in thread
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2026-01-09 5:10 [PATCH] loongarch: wire up memfd_secret system call Lain Fearyncess Yang
2026-01-09 6:45 ` Arnd Bergmann
2026-01-09 8:21 ` Mike Rapoport
2026-01-09 13:28 ` David Hildenbrand (Red Hat)
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