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From: Jan Kiszka <jan.kiszka@siemens.com>
To: xenomai@xenomai.org
Subject: [PATCH 10/17] lib/cobalt/arm: dovetail: skip detection of KUSER_TSC support
Date: Fri, 11 Jun 2021 20:05:36 +0200	[thread overview]
Message-ID: <ea5688a154ec6cdb3a95dc025e13985c90e9c0da.1623434743.git.jan.kiszka@siemens.com> (raw)
In-Reply-To: <cover.1623434743.git.jan.kiszka@siemens.com>

From: Philippe Gerum <rpm@xenomai.org>

When Dovetail is enabled in the kernel, we get timestamps for common
clocks (CLOCK_REALTIME, CLOCK_MONOTONIC) from the vDSO-based gettime()
routine as usual.  Do not expect KUSER_TSC support to be there in such
a case, it is not.

Signed-off-by: Philippe Gerum <rpm@xenomai.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
 lib/cobalt/arch/arm/features.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/cobalt/arch/arm/features.c b/lib/cobalt/arch/arm/features.c
index d7b50f73f..b4eddaad4 100644
--- a/lib/cobalt/arch/arm/features.c
+++ b/lib/cobalt/arch/arm/features.c
@@ -25,6 +25,7 @@
 #include <unistd.h>
 #include <limits.h>
 #include <cobalt/wrappers.h>
+#include <cobalt/ticks.h>
 #include <asm/xenomai/syscall.h>
 #include <asm/xenomai/tsc.h>
 #include <asm/xenomai/features.h>
@@ -44,6 +45,9 @@ void cobalt_arch_check_features(struct cobalt_featinfo *finfo)
 	int err, fd;
 	void *addr;
 
+	if (!cobalt_use_legacy_tsc())
+		return;
+
 	if (__xn_tscinfo.kinfo.counter != NULL)
 		return;
 
-- 
2.26.2



  parent reply	other threads:[~2021-06-11 18:05 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-11 18:05 [PATCH 00/17] Dovetail integration - the finals Jan Kiszka
2021-06-11 18:05 ` [PATCH 01/17] cobalt/thread: Rework kthread check for xnthread_signal Jan Kiszka
2021-06-11 18:05 ` [PATCH 02/17] cobalt/thread: Move xnthread_signal work off the stack Jan Kiszka
2021-06-11 18:05 ` [PATCH 03/17] cobalt/thread: Privatize xnthread_map to map_kthread Jan Kiszka
2021-06-11 18:05 ` [PATCH 04/17] cobalt/thread: Pull kthread inband work onto creator stack Jan Kiszka
2021-06-11 18:05 ` [PATCH 05/17] cobalt/thread: Make sure relax inband work is on a stack outliving the wakeup Jan Kiszka
2021-06-11 18:05 ` [PATCH 06/17] cobalt/thread: dovetail: keep hard irqs off on transition to in-band Jan Kiszka
2022-01-24 16:15   ` Jan Kiszka
2022-01-24 16:55     ` Philippe Gerum
2022-01-24 17:00       ` Philippe Gerum
2022-01-24 17:05         ` Jan Kiszka
2021-06-11 18:05 ` [PATCH 07/17] cobalt/sched: dovetail: prevent early scheduling on uninit runqueues Jan Kiszka
2021-06-11 18:05 ` [PATCH 08/17] cobalt/arm: dovetail: add architecture bits Jan Kiszka
2021-06-11 18:05 ` [PATCH 09/17] lib/cobalt: Reorder low_init for having cobalt_use_legacy_tsc earlier available Jan Kiszka
2021-06-11 18:05 ` Jan Kiszka [this message]
2021-06-11 18:05 ` [PATCH 11/17] lib/cobalt/arm64: dovetail: skip detection of KUSER_TSC support Jan Kiszka
2021-06-11 18:05 ` [PATCH 12/17] cobalt/tick: dovetail: improve accuracy of the host tick delay Jan Kiszka
2021-06-11 18:05 ` [PATCH 13/17] cobalt/tick: dovetail: Drop pointless inline specifier from pipeline_must_force_program_tick Jan Kiszka
2021-06-11 18:05 ` [PATCH 14/17] cobalt/clock: dovetail: abstract interface to hardware TSC Jan Kiszka
2021-06-11 18:05 ` [PATCH 15/17] cobalt/arm64: dovetail: add architecture bits Jan Kiszka
2021-06-11 18:05 ` [PATCH 16/17] cobalt/syscall: Account for different syscall argument marshaling Jan Kiszka
2021-06-11 18:05 ` [PATCH 17/17] ci: Add arm, arm64 and x86 dovetail targets for kernel 5.10 Jan Kiszka
2021-06-13 17:07 ` [PATCH 00/17] Dovetail integration - the finals Philippe Gerum
2021-06-13 17:12   ` Jan Kiszka
2021-06-14  6:24     ` Philippe Gerum

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