kernel/git/stable/linux-stable.git/lib/vdso, branch linux-6.17.y

vdso/datastore: Gate time data behind CONFIG_GENERIC_GETTIMEOFDAY

2025-10-15T10:03:24+00:00

[ Upstream commit 7c0c01a216e6d9e1d169c0f6f3b5522e6da708ed ] When the generic vDSO does not provide time functions, as for example on riscv32, then the time data store is not necessary. Avoid allocating these time data pages when not used. Fixes: df7fcbefa710 ("vdso: Add generic time data storage") Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20250826-vdso-cleanups-v1-1-d9b65750e49f@linutronix.de Signed-off-by: Sasha Levin

vdso/gettimeofday: Add support for auxiliary clocks

2025-07-18T12:09:39+00:00

Expose the auxiliary clocks through the vDSO. Architectures not using the generic vDSO time framework, namely SPARC64, are not supported. Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20250701-vdso-auxclock-v1-12-df7d9f87b9b8@linutronix.de

vdso/gettimeofday: Introduce vdso_get_timestamp()

2025-07-18T11:45:32+00:00

This code is duplicated and with the introduction of auxiliary clocks will be duplicated even more. Introduce a helper. Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20250701-vdso-auxclock-v1-9-df7d9f87b9b8@linutronix.de

vdso/gettimeofday: Introduce vdso_set_timespec()

2025-07-18T11:45:32+00:00

vdso/gettimeofday: Introduce vdso_clockid_valid()

2025-07-18T11:45:32+00:00

Move the clock ID validation check into a common helper. Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20250701-vdso-auxclock-v1-7-df7d9f87b9b8@linutronix.de

vdso/gettimeofday: Return bool from clock_gettime() helpers

2025-07-18T11:45:32+00:00

The internal helpers are effectively using boolean results, while pretending to use error numbers. Switch the return type to bool for more clarity. Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20250701-vdso-auxclock-v1-6-df7d9f87b9b8@linutronix.de

vdso/gettimeofday: Return bool from clock_getres() helpers

2025-07-09T09:52:34+00:00

mseal sysmap: generic vdso vvar mapping

2025-04-01T22:17:15+00:00

With the introduction of the generic vdso data storage the VM_SEALED_SYSMAP vm flag must be moved from the architecture specific _install_special_mapping() call [1] [2] which maps the vvar mapping to generic code. [1] https://lkml.kernel.org/r/20250305021711.3867874-4-jeffxu@google.com [2] https://lkml.kernel.org/r/20250305021711.3867874-5-jeffxu@google.com Link: https://lkml.kernel.org/r/20250311123326.2686682-2-hca@linux.ibm.com Signed-off-by: Heiko Carstens Reviewed-by: Lorenzo Stoakes Cc: Alexander Gordeev Cc: Christian Borntraeger Cc: Jeff Xu Cc: Liam Howlett Cc: Sven Schnelle Cc: Thomas Weißschuh Cc: Vasily Gorbik Signed-off-by: Andrew Morton

vdso: Rework struct vdso_time_data and introduce struct vdso_clock

2025-03-08T13:37:41+00:00

To support multiple PTP clocks, the VDSO data structure needs to be reworked. All clock specific data will end up in struct vdso_clock and in struct vdso_time_data there will be an array of VDSO clocks. Now that all preparatory changes are in place: Split the clock related struct members into a separate struct vdso_clock. Make sure all users are aware, that vdso_time_data is no longer initialized as an array and vdso_clock is now the array inside vdso_data. Remove the vdso_clock define, which mapped it to vdso_time_data for the transition. Signed-off-by: Anna-Maria Behnsen Signed-off-by: Nam Cao Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20250303-vdso-clock-v1-19-c1b5c69a166f@linutronix.de

vdso/namespace: Rename timens_setup_vdso_data() to reflect new vdso_clock struct

2025-03-08T13:37:41+00:00

To support multiple PTP clocks, the VDSO data structure needs to be reworked. All clock specific data will end up in struct vdso_clock and in struct vdso_time_data there will be array of VDSO clocks. At the moment, vdso_clock is simply a define which maps vdso_clock to vdso_time_data. For time namespaces, vdso_time_data needs to be set up. But only the clock related part of the vdso_data thats requires this setup. To reflect the future struct vdso_clock, rename timens_setup_vdso_data() to timns_setup_vdso_clock_data(). No functional change. Signed-off-by: Anna-Maria Behnsen Signed-off-by: Nam Cao Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20250303-vdso-clock-v1-13-c1b5c69a166f@linutronix.de