| f5e386fe | 27-Feb-2026 |
Thomas Weißschuh <thomas.weissschuh@linutronix.de> |
vdso/datapage: Trim down unnecessary includes
vdso/datapage.h includes a lot of headers which are not strictly necessary.
Some of those headers include architecture-specific vDSO headers which
preve
vdso/datapage: Trim down unnecessary includes
vdso/datapage.h includes a lot of headers which are not strictly necessary.
Some of those headers include architecture-specific vDSO headers which
prevent the usage of vdso/datapage.h in kernel code on architectures
without an vDSO. This would be useful however to write generic code using
IS_ENABLED(), for example in drivers/char/random.c.
Remove the unnecessary includes.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://patch.msgid.link/20260227-vdso-header-cleanups-v2-13-35d60acf7410@linutronix.de
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| 750d8cc8 | 27-Feb-2026 |
Thomas Weißschuh <thomas.weissschuh@linutronix.de> |
vdso/datapage: Remove inclusion of gettimeofday.h
vdso/datapage.h is useful without pulling in the architecture-specific
gettimeofday() helpers.
Move the include to the only users which needs it.
vdso/datapage: Remove inclusion of gettimeofday.h
vdso/datapage.h is useful without pulling in the architecture-specific
gettimeofday() helpers.
Move the include to the only users which needs it.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://patch.msgid.link/20260227-vdso-header-cleanups-v2-12-35d60acf7410@linutronix.de
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| 0c02d6df | 27-Feb-2026 |
Thomas Weißschuh <thomas.weissschuh@linutronix.de> |
vdso/gettimeofday: Move the unlikely() into vdso_read_retry()
All callers of vdso_read_retry() test its return value with unlikely().
Move the unlikely into the helper to make the code easier to rea
vdso/gettimeofday: Move the unlikely() into vdso_read_retry()
All callers of vdso_read_retry() test its return value with unlikely().
Move the unlikely into the helper to make the code easier to read.
This is equivalent to the retry function of non-vDSO seqlocks.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://patch.msgid.link/20260227-vdso-cleanups-v1-4-c848b4bc4850@linutronix.de
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| a657bebd | 27-Feb-2026 |
Thomas Weißschuh <thomas.weissschuh@linutronix.de> |
vdso/gettimeofday: Add a helper to test if a clock is namespaced
Currently this logic is duplicate multiple times.
Add a helper for it to make the code more readable.
[ bp: Add a missing clockso
vdso/gettimeofday: Add a helper to test if a clock is namespaced
Currently this logic is duplicate multiple times.
Add a helper for it to make the code more readable.
[ bp: Add a missing clocksource.h include, see
https://lore.kernel.org/r/20260311113435-f72f81d8-33a6-4a0f-bd80-4997aad068cc@linutronix.de ]
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://patch.msgid.link/20260227-vdso-cleanups-v1-3-c848b4bc4850@linutronix.de
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| 437054b1 | 15-Aug-2025 |
Thomas Weißschuh <thomas.weissschuh@linutronix.de> |
vdso: Add struct __kernel_old_timeval forward declaration to gettime.h
The prototype of __vdso_gettimeofday() uses this struct. However
gettime.h's own includes do not provide a definition for it.
vdso: Add struct __kernel_old_timeval forward declaration to gettime.h
The prototype of __vdso_gettimeofday() uses this struct. However
gettime.h's own includes do not provide a definition for it.
Add a forward declaration, similar to other used structs.
Fixes: 42874e4eb35b ("arch: vdso: consolidate gettime prototypes")
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250815-vdso-sparc64-generic-2-v2-1-b5ff80672347@linutronix.de
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| cd3557a7 | 01-Jul-2025 |
Thomas Weißschuh <thomas.weissschuh@linutronix.de> |
vdso/gettimeofday: Add support for auxiliary clocks
Expose the auxiliary clocks through the vDSO.
Architectures not using the generic vDSO time framework,
namely SPARC64, are not supported.
Signed
vdso/gettimeofday: Add support for auxiliary clocks
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 <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250701-vdso-auxclock-v1-12-df7d9f87b9b8@linutronix.de
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| 380b84e1 | 01-Jul-2025 |
Thomas Weißschuh <thomas.weissschuh@linutronix.de> |
vdso/vsyscall: Update auxiliary clock data in the datapage
Expose the auxiliary clock data so it can be read from the vDSO.
Architectures not using the generic vDSO time framework,
namely SPARC64,
vdso/vsyscall: Update auxiliary clock data in the datapage
Expose the auxiliary clock data so it can be read from the vDSO.
Architectures not using the generic vDSO time framework,
namely SPARC64, are not supported.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250701-vdso-auxclock-v1-11-df7d9f87b9b8@linutronix.de
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| 9b7fc3f1 | 01-Jul-2025 |
Thomas Weißschuh <thomas.weissschuh@linutronix.de> |
vdso: Introduce aux_clock_resolution_ns()
Move the constant resolution to a shared header,
so the vDSO can use it and return it without going through a syscall.
Signed-off-by: Thomas Weißschuh <tho
vdso: Introduce aux_clock_resolution_ns()
Move the constant resolution to a shared header,
so the vDSO can use it and return it without going through a syscall.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250701-vdso-auxclock-v1-10-df7d9f87b9b8@linutronix.de
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| 886653e3 | 03-Mar-2025 |
Anna-Maria Behnsen <anna-maria@linutronix.de> |
vdso: Rework struct vdso_time_data and introduce struct vdso_clock
To support multiple PTP clocks, the VDSO data structure needs to be
reworked. All clock specific data will end up in struct vdso_cl
vdso: Rework struct vdso_time_data and introduce struct vdso_clock
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 <anna-maria@linutronix.de>
Signed-off-by: Nam Cao <namcao@linutronix.de>
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250303-vdso-clock-v1-19-c1b5c69a166f@linutronix.de
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| 97a5a90c | 03-Mar-2025 |
Anna-Maria Behnsen <anna-maria@linutronix.de> |
vdso: Move architecture related data before basetime data
Architecture related vdso data is required in the fast path when reading
CLOCK_MONOTONIC or CLOCK_REALTIME. At the moment, this information
vdso: Move architecture related data before basetime data
Architecture related vdso data is required in the fast path when reading
CLOCK_MONOTONIC or CLOCK_REALTIME. At the moment, this information is
located at the end of the vdso_time_data structure, which is a suboptimal
cache layout.
Move the architecture specific VDSO data right before the basetime
information, which is always required. This change does not have an impact
on architectures with CONFIG_ARCH_HAS_VDSO_DATA=n. Architectures, which
have it enabled, gain a better cache layout.
Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de>
Signed-off-by: Nam Cao <namcao@linutronix.de>
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250303-vdso-clock-v1-18-c1b5c69a166f@linutronix.de
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| e15bf9e3 | 03-Mar-2025 |
Anna-Maria Behnsen <anna-maria@linutronix.de> |
vdso/helpers: Prepare introduction of struct vdso_clock
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
vdso/helpers: Prepare introduction of struct vdso_clock
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. For now,
vdso_clock is simply a define which maps vdso_clock to vdso_time_data.
Prepare all functions which need the pointer to the vdso_clock array to
work well after the structures get reworked. Replace the struct vdso_time_data
pointer with a struct vdso_clock pointer where applicable.
No functional change.
Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de>
Signed-off-by: Nam Cao <namcao@linutronix.de>
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250303-vdso-clock-v1-5-c1b5c69a166f@linutronix.de
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