From: "Thomas Weißschuh" <thomas.weissschuh@linutronix.de>
To: Andy Lutomirski <luto@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Alexandre Ghiti <alex@ghiti.fr>, Nam Cao <namcao@linutronix.de>,
Russell King <linux@armlinux.org.uk>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Huacai Chen <chenhuacai@kernel.org>,
WANG Xuerui <kernel@xen0n.name>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Madhavan Srinivasan <maddy@linux.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Nicholas Piggin <npiggin@gmail.com>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Sven Schnelle <svens@linux.ibm.com>,
Arnd Bergmann <arnd@arndb.de>,
Christian Brauner <brauner@kernel.org>,
Shuah Khan <shuah@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev,
linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
linux-s390@vger.kernel.org, linux-arch@vger.kernel.org,
linux-kselftest@vger.kernel.org,
"Rasmus Villemoes" <linux@rasmusvillemoes.dk>,
"Thomas Weißschuh" <thomas.weissschuh@linutronix.de>
Subject: [PATCH 10/11] vdso: Drop kconfig GENERIC_VDSO_TIME_NS
Date: Tue, 26 Aug 2025 08:17:13 +0200 [thread overview]
Message-ID: <20250826-vdso-cleanups-v1-10-d9b65750e49f@linutronix.de> (raw)
In-Reply-To: <20250826-vdso-cleanups-v1-0-d9b65750e49f@linutronix.de>
All architectures implementing time-related functionality in the vDSO are
using the generic vDSO library which handles time namespaces properly.
Remove the now unnecessary kconfig symbol.
Enables the use of time namespaces on architectures, which use the
generic vDSO but did not enable GENERIC_VDSO_TIME_NS, namely MIPS and arm.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
Technically this is still too restrictive, as it prevents architectures
without a real vDSO to enable CONFIG_TIME_NS. Right now this restriction
only protects the SPARC vDSO. I have patches to drop it completely,
as soon as SPARC is usingthe generic vDSO.
---
arch/arm64/Kconfig | 1 -
arch/loongarch/Kconfig | 1 -
arch/powerpc/Kconfig | 1 -
arch/riscv/Kconfig | 1 -
arch/s390/Kconfig | 1 -
arch/x86/Kconfig | 1 -
init/Kconfig | 2 +-
lib/vdso/Kconfig | 6 ------
tools/testing/selftests/pidfd/config | 1 -
9 files changed, 1 insertion(+), 14 deletions(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index b0f007b396c81906d3a0a66f8a240d97e0ae2d88..e19b006842e223441b87370a5ae23756e0e85883 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -162,7 +162,6 @@ config ARM64
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL
select GENERIC_GETTIMEOFDAY
- select GENERIC_VDSO_TIME_NS
select HARDIRQS_SW_RESEND
select HAS_IOPORT
select HAVE_MOVE_PMD
diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
index d15b201d55f951d95435a38789cf47ea9f0adac9..754626b58b929e605d51c441cfa862bd504b5892 100644
--- a/arch/loongarch/Kconfig
+++ b/arch/loongarch/Kconfig
@@ -108,7 +108,6 @@ config LOONGARCH
select GENERIC_SCHED_CLOCK
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL
- select GENERIC_VDSO_TIME_NS
select GPIOLIB
select HAS_IOPORT
select HAVE_ARCH_AUDITSYSCALL
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 78c82af955616c57ab38ea1241e3471eb8d0a65d..d715e3d65b5c29e0010b0a5e5821aee34e31e176 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -207,7 +207,6 @@ config PPC
select GENERIC_PCI_IOMAP if PCI
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL
- select GENERIC_VDSO_TIME_NS
select HAS_IOPORT if PCI
select HAVE_ARCH_AUDITSYSCALL
select HAVE_ARCH_HUGE_VMALLOC if HAVE_ARCH_HUGE_VMAP
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index f6cf9180ccf2c9774248fea93a8276de3791ad71..6e5efbeb83d7f0fe556bc04ec9f58b80d2780b43 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -121,7 +121,6 @@ config RISCV
select GENERIC_SCHED_CLOCK
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL if GENERIC_GETTIMEOFDAY
- select GENERIC_VDSO_TIME_NS if GENERIC_GETTIMEOFDAY
select HARDIRQS_SW_RESEND
select HAS_IOPORT if MMU
select HAVE_ALIGNED_STRUCT_PAGE
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 696d2243d64b04e77b9b4631fc8bc301916b48ae..e06ebbd860da93a8c838113c3c1b946d51dfe1b4 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -167,7 +167,6 @@ config S390
select GENERIC_GETTIMEOFDAY
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL
- select GENERIC_VDSO_TIME_NS
select GENERIC_IOREMAP if PCI
select HAVE_ALIGNED_STRUCT_PAGE
select HAVE_ARCH_AUDITSYSCALL
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 1e74b2a356e42bdc0ede258f44e18ba29dd90174..d1961811e291e8adcf0b46fafbd53f0a44b5d25b 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -181,7 +181,6 @@ config X86
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL
select GENERIC_GETTIMEOFDAY
- select GENERIC_VDSO_TIME_NS
select GENERIC_VDSO_OVERFLOW_PROTECT
select GUP_GET_PXX_LOW_HIGH if X86_PAE
select HARDIRQS_SW_RESEND
diff --git a/init/Kconfig b/init/Kconfig
index 83632025121937527523f5977a493bd3ae24ed9f..5c429a184d1b0550dda9f075ffcbffb68c6d8f50 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1346,7 +1346,7 @@ config UTS_NS
config TIME_NS
bool "TIME namespace"
- depends on GENERIC_VDSO_TIME_NS
+ depends on GENERIC_GETTIMEOFDAY
default y
help
In this namespace boottime and monotonic clocks can be set.
diff --git a/lib/vdso/Kconfig b/lib/vdso/Kconfig
index 48ffb0f6fa413ea7da4e43c7f7a24cb232b38ea1..3d2c2b90d193f984e3a202e701fa7f0bfa8f1938 100644
--- a/lib/vdso/Kconfig
+++ b/lib/vdso/Kconfig
@@ -12,12 +12,6 @@ config GENERIC_GETTIMEOFDAY
Each architecture that enables this feature has to
provide the fallback implementation.
-config GENERIC_VDSO_TIME_NS
- bool
- help
- Selected by architectures which support time namespaces in the
- VDSO
-
config GENERIC_VDSO_OVERFLOW_PROTECT
bool
help
diff --git a/tools/testing/selftests/pidfd/config b/tools/testing/selftests/pidfd/config
index 6133524710f790c1f83af6f2b628de9b62eee6c3..cf7cc0ce02484e91799b7cb132447283f818d729 100644
--- a/tools/testing/selftests/pidfd/config
+++ b/tools/testing/selftests/pidfd/config
@@ -4,6 +4,5 @@ CONFIG_USER_NS=y
CONFIG_PID_NS=y
CONFIG_NET_NS=y
CONFIG_TIME_NS=y
-CONFIG_GENERIC_VDSO_TIME_NS=y
CONFIG_CGROUPS=y
CONFIG_CHECKPOINT_RESTORE=y
--
2.50.1
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next prev parent reply other threads:[~2025-08-26 6:49 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-26 6:17 [PATCH 00/11] vdso: Various cleanups Thomas Weißschuh
2025-08-26 6:17 ` [PATCH 01/11] vdso/datastore: Gate time data behind CONFIG_GENERIC_GETTIMEOFDAY Thomas Weißschuh
2025-08-26 6:17 ` [PATCH 02/11] ARM: VDSO: remove cntvct_ok global variable Thomas Weißschuh
2025-08-26 6:17 ` [PATCH 03/11] vdso: Move ENABLE_COMPAT_VDSO from core to arm64 Thomas Weißschuh
2025-08-26 19:33 ` Catalin Marinas
2025-08-26 6:17 ` [PATCH 04/11] vdso/gettimeofday: Remove !CONFIG_TIME_NS stubs Thomas Weißschuh
2025-08-26 6:17 ` [PATCH 05/11] time: Build generic update_vsyscall() only with generic time vDSO Thomas Weißschuh
2025-08-26 6:17 ` [PATCH 06/11] riscv: vdso: Untangle kconfig logic Thomas Weißschuh
2025-08-26 6:17 ` [PATCH 07/11] vdso: Drop kconfig GENERIC_VDSO_32 Thomas Weißschuh
2025-08-26 6:17 ` [PATCH 08/11] vdso: Drop kconfig GENERIC_COMPAT_VDSO Thomas Weißschuh
2025-08-26 19:33 ` Catalin Marinas
2025-08-26 6:17 ` [PATCH 09/11] vdso: Drop kconfig GENERIC_VDSO_DATA_STORE Thomas Weißschuh
2025-08-26 19:33 ` Catalin Marinas
2025-08-26 6:17 ` Thomas Weißschuh [this message]
2025-08-26 19:34 ` [PATCH 10/11] vdso: Drop kconfig GENERIC_VDSO_TIME_NS Catalin Marinas
2025-08-26 6:17 ` [PATCH 11/11] vdso: Gate VDSO_GETRANDOM behind HAVE_GENERIC_VDSO Thomas Weißschuh
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