From nobody Tue Oct 7 14:05:34 2025 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5A8912882CC; Wed, 9 Jul 2025 09:57:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752055059; cv=none; b=egD7Vj/+ntoShGpib/C8wjQ6CLNMwYes6lJxJUyEdiTXGaMFESkBagu4gX0x5LCSl7si532tnBykAcJ8DO2eQAUNkLKJT4wNV2hERlXI5dsgEEtLQKV3FZ013VFJLmOccXuqU6Z8QMFQy/vBCkA+z1HfloTFZdqe4exi0aTBTfs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752055059; c=relaxed/simple; bh=olUqO8jW3DuOWOsBI5sNZqhgVRVWV9cwhUNZU+JQOmw=; h=Date:From:To:Subject:Cc:In-Reply-To:References:MIME-Version: Message-ID:Content-Type; b=h2K5y9PFanigZ/FcRFyvEYgbNatrXmafuTlPfLysm0j03LHNjFw5vrf2Sq+n+swG+CSPICyjxR4FyM3MbqXaEAIx3/wAKvqMQD1q26W/w5ahglXyRo1TgU9ZdezMinAKP7xQFq5OT0TmXRwm2O+pR9/5zDFzo/i9HCm+LH6ucLM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=0v6oJLPE; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=E1wj5/uz; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="0v6oJLPE"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="E1wj5/uz" Date: Wed, 09 Jul 2025 09:57:32 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1752055053; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=W9jfPh9bAGLcoejK/nW4ZdDz02LG9rVkmbS0nVWEh18=; b=0v6oJLPE6L/wsB7DWVyKrX7AZxuvJUJUmIZzZ0MMCvFqYxjTLhsXOGk0iDvUUFbpFgIF7G eQ+BF4xJsgLYUszZ2vUhFyNEwVF5L2M2od4NKq58OY9Go93S8nfNTW9TnisGYZe0Wqla6k CSNszSrksEhXL69F964XvtyM7aoPQtRwbMevjmGmB7eqavBpuUie4KaVT2mnmIaOdic/VD 0AwbHwLsdublTMaHTX8Z77PKixbsYnmmyO/BC5KPGjE9s0tHDJCP/Hk1fSHaT+2HldAMlR a1H298rBqTfo2KXK02dEE+iY9Xi7bmR657Vf4gl1dtoS70Xmb9Ssizadw4pwJg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1752055053; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=W9jfPh9bAGLcoejK/nW4ZdDz02LG9rVkmbS0nVWEh18=; b=E1wj5/uzXGWtJyiP1iw2iPchusQJRj3B9n+TjfAbuabWX1365SvTnxSprUBWocTzACJtdv tBLoueHh/QuWWTBA== From: tip-bot2 for Thomas =?utf-8?q?Wei=C3=9Fschuh?= Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: timers/ptp] vdso/vsyscall: Update auxiliary clock data in the datapage Cc: thomas.weissschuh@linutronix.de, Thomas Gleixner , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20250701-vdso-auxclock-v1-11-df7d9f87b9b8@linutronix.de> References: <20250701-vdso-auxclock-v1-11-df7d9f87b9b8@linutronix.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <175205505202.406.1779998204348578569.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Precedence: bulk Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable The following commit has been merged into the timers/ptp branch of tip: Commit-ID: e0c8cdaf04a26206b96af0cc15947afd4cbb570c Gitweb: https://git.kernel.org/tip/e0c8cdaf04a26206b96af0cc15947afd4= cbb570c Author: Thomas Wei=C3=9Fschuh AuthorDate: Tue, 01 Jul 2025 10:58:05 +02:00 Committer: Thomas Gleixner CommitterDate: Wed, 09 Jul 2025 11:52:35 +02:00 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 Wei=C3=9Fschuh Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20250701-vdso-auxclock-v1-11-df7d9f87b9b8= @linutronix.de --- include/linux/timekeeper_internal.h | 6 ++++- include/vdso/datapage.h | 3 ++- kernel/time/namespace.c | 5 ++++- kernel/time/timekeeping.c | 12 ++++++++- kernel/time/vsyscall.c | 40 ++++++++++++++++++++++++++++- 5 files changed, 66 insertions(+) diff --git a/include/linux/timekeeper_internal.h b/include/linux/timekeeper= _internal.h index ca79938..c27aac6 100644 --- a/include/linux/timekeeper_internal.h +++ b/include/linux/timekeeper_internal.h @@ -190,4 +190,10 @@ static inline void update_vsyscall_tz(void) } #endif =20 +#if defined(CONFIG_GENERIC_GETTIMEOFDAY) && defined(CONFIG_POSIX_AUX_CLOCK= S) +extern void vdso_time_update_aux(struct timekeeper *tk); +#else +static inline void vdso_time_update_aux(struct timekeeper *tk) { } +#endif + #endif /* _LINUX_TIMEKEEPER_INTERNAL_H */ diff --git a/include/vdso/datapage.h b/include/vdso/datapage.h index 1864e76..f4c96d9 100644 --- a/include/vdso/datapage.h +++ b/include/vdso/datapage.h @@ -38,6 +38,7 @@ struct vdso_arch_data { #endif =20 #define VDSO_BASES (CLOCK_TAI + 1) +#define VDSO_BASE_AUX 0 #define VDSO_HRES (BIT(CLOCK_REALTIME) | \ BIT(CLOCK_MONOTONIC) | \ BIT(CLOCK_BOOTTIME) | \ @@ -117,6 +118,7 @@ struct vdso_clock { * @arch_data: architecture specific data (optional, defaults * to an empty struct) * @clock_data: clocksource related data (array) + * @aux_clock_data: auxiliary clocksource related data (array) * @tz_minuteswest: minutes west of Greenwich * @tz_dsttime: type of DST correction * @hrtimer_res: hrtimer resolution @@ -133,6 +135,7 @@ struct vdso_time_data { struct arch_vdso_time_data arch_data; =20 struct vdso_clock clock_data[CS_BASES]; + struct vdso_clock aux_clock_data[MAX_AUX_CLOCKS]; =20 s32 tz_minuteswest; s32 tz_dsttime; diff --git a/kernel/time/namespace.c b/kernel/time/namespace.c index e364227..6674527 100644 --- a/kernel/time/namespace.c +++ b/kernel/time/namespace.c @@ -242,6 +242,11 @@ static void timens_set_vvar_page(struct task_struct *t= ask, for (i =3D 0; i < CS_BASES; i++) timens_setup_vdso_clock_data(&vc[i], ns); =20 + if (IS_ENABLED(CONFIG_POSIX_AUX_CLOCKS)) { + for (i =3D 0; i < ARRAY_SIZE(vdata->aux_clock_data); i++) + timens_setup_vdso_clock_data(&vdata->aux_clock_data[i], ns); + } + out: mutex_unlock(&offset_lock); } diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index cbcf090..243fe25 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -66,11 +66,21 @@ static inline bool tk_get_aux_ts64(unsigned int tkid, s= truct timespec64 *ts) { return ktime_get_aux_ts64(CLOCK_AUX + tkid - TIMEKEEPER_AUX_FIRST, ts); } + +static inline bool tk_is_aux(const struct timekeeper *tk) +{ + return tk->id >=3D TIMEKEEPER_AUX_FIRST && tk->id <=3D TIMEKEEPER_AUX_LAS= T; +} #else static inline bool tk_get_aux_ts64(unsigned int tkid, struct timespec64 *t= s) { return false; } + +static inline bool tk_is_aux(const struct timekeeper *tk) +{ + return false; +} #endif =20 /* flag for if timekeeping is suspended */ @@ -719,6 +729,8 @@ static void timekeeping_update_from_shadow(struct tk_da= ta *tkd, unsigned int act =20 update_fast_timekeeper(&tk->tkr_mono, &tk_fast_mono); update_fast_timekeeper(&tk->tkr_raw, &tk_fast_raw); + } else if (tk_is_aux(tk)) { + vdso_time_update_aux(tk); } =20 if (action & TK_CLOCK_WAS_SET) diff --git a/kernel/time/vsyscall.c b/kernel/time/vsyscall.c index df6bada..8ba8b0d 100644 --- a/kernel/time/vsyscall.c +++ b/kernel/time/vsyscall.c @@ -136,6 +136,46 @@ void update_vsyscall_tz(void) __arch_sync_vdso_time_data(vdata); } =20 +#ifdef CONFIG_POSIX_AUX_CLOCKS +void vdso_time_update_aux(struct timekeeper *tk) +{ + struct vdso_time_data *vdata =3D vdso_k_time_data; + struct vdso_timestamp *vdso_ts; + struct vdso_clock *vc; + s32 clock_mode; + u64 nsec; + + vc =3D &vdata->aux_clock_data[tk->id - TIMEKEEPER_AUX_FIRST]; + vdso_ts =3D &vc->basetime[VDSO_BASE_AUX]; + clock_mode =3D tk->tkr_mono.clock->vdso_clock_mode; + if (!tk->clock_valid) + clock_mode =3D VDSO_CLOCKMODE_NONE; + + /* copy vsyscall data */ + vdso_write_begin_clock(vc); + + vc->clock_mode =3D clock_mode; + + if (clock_mode !=3D VDSO_CLOCKMODE_NONE) { + fill_clock_configuration(vc, &tk->tkr_mono); + + vdso_ts->sec =3D tk->xtime_sec; + + nsec =3D tk->tkr_mono.xtime_nsec >> tk->tkr_mono.shift; + nsec +=3D tk->offs_aux; + vdso_ts->sec +=3D __iter_div_u64_rem(nsec, NSEC_PER_SEC, &nsec); + nsec =3D nsec << tk->tkr_mono.shift; + vdso_ts->nsec =3D nsec; + } + + __arch_update_vdso_clock(vc); + + vdso_write_end_clock(vc); + + __arch_sync_vdso_time_data(vdata); +} +#endif + /** * vdso_update_begin - Start of a VDSO update section *