From: Mark Rutland <mark.rutland@arm.com>
To: fu.wei@linaro.org
Cc: rjw@rjwysocki.net, lenb@kernel.org, daniel.lezcano@linaro.org,
tglx@linutronix.de, marc.zyngier@arm.com,
lorenzo.pieralisi@arm.com, sudeep.holla@arm.com,
hanjun.guo@linaro.org, linux-arm-kernel@lists.infradead.org,
linaro-acpi@lists.linaro.org, linux-kernel@vger.kernel.org,
linux-acpi@vger.kernel.org, rruigrok@codeaurora.org,
harba@codeaurora.org, cov@codeaurora.org, timur@codeaurora.org,
graeme.gregory@linaro.org, al.stone@linaro.org, jcm@redhat.com,
wei@redhat.com, arnd@arndb.de, catalin.marinas@arm.com,
will.deacon@arm.com, Suravee.Suthikulpanit@amd.com,
leo.duran@amd.com, wim@iguana.be, linux@roeck-us.net,
linux-watchdog@vger.kernel.org, tn@semihalf.com,
christoffer.dall@linaro.org, julien.grall@arm.com
Subject: Re: [PATCH v14 5/9] clocksource/drivers/arm_arch_timer: Simplify ACPI support code.
Date: Thu, 20 Oct 2016 17:58:17 +0100 [thread overview]
Message-ID: <20161020165747.GD27598@leverpostej> (raw)
In-Reply-To: <1475086637-1914-6-git-send-email-fu.wei@linaro.org>
On Thu, Sep 29, 2016 at 02:17:13AM +0800, fu.wei@linaro.org wrote:
> From: Fu Wei <fu.wei@linaro.org>
>
> The patch update arm_arch_timer driver to use the function
> provided by the new GTDT driver of ACPI.
> By this way, arm_arch_timer.c can be simplified, and separate
> all the ACPI GTDT knowledge from this timer driver.
>
> Signed-off-by: Fu Wei <fu.wei@linaro.org>
> Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
This generally looks fine, but:
> + arch_timer_ppi[PHYS_SECURE_PPI] = acpi_gtdt_map_ppi(PHYS_SECURE_PPI);
As mentioned on the prior patch, I think we shouldn't bother parsing the
secure interrupt, given the problem with the GSIV, and the fact that we
shouldn't need it in Linux.
> + arch_timer_ppi[PHYS_NONSECURE_PPI] = acpi_gtdt_map_ppi(PHYS_NONSECURE_PPI);
> + arch_timer_ppi[VIRT_PPI] = acpi_gtdt_map_ppi(VIRT_PPI);
> + arch_timer_ppi[HYP_PPI] = acpi_gtdt_map_ppi(HYP_PPI);
> + /* Always-on capability */
> + arch_timer_c3stop = acpi_gtdt_c3stop();
... I think we should check the flag on the relevant interrupt, though
that's worth clarifying.
>
> - /* Always-on capability */
> - arch_timer_c3stop = !(gtdt->non_secure_el1_flags & ACPI_GTDT_ALWAYS_ON);
> + if (timer_count < 0)
> + pr_err("Failed to get platform timer info.\n");
Why don't we log this in the code that would try to initialise the MMIO
timer? We can still fail after this.
Thanks,
Mark.
next prev parent reply other threads:[~2016-10-20 16:58 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-28 18:17 [PATCH v14 0/9] acpi, clocksource: add GTDT driver and GTDT support in arm_arch_timer fu.wei
2016-09-28 18:17 ` [PATCH v14 1/9] clocksource/drivers/arm_arch_timer: Move enums and defines to header file fu.wei
2016-10-20 14:45 ` Mark Rutland
2016-10-26 8:31 ` Fu Wei
2016-10-26 10:51 ` Mark Rutland
2016-10-26 10:54 ` Fu Wei
2016-09-28 18:17 ` [PATCH v14 2/9] clocksource/drivers/arm_arch_timer: Add a new enum for spi type fu.wei
2016-10-20 15:09 ` Mark Rutland
2016-10-26 8:26 ` Fu Wei
2016-09-28 18:17 ` [PATCH v14 3/9] clocksource/drivers/arm_arch_timer: Improve printk relevant code fu.wei
2016-10-20 15:32 ` Mark Rutland
2016-10-26 8:28 ` Fu Wei
2016-09-28 18:17 ` [PATCH v14 4/9] acpi/arm64: Add GTDT table parse driver fu.wei
2016-10-20 16:37 ` Mark Rutland
2016-10-26 11:10 ` Fu Wei
2016-10-26 12:11 ` Marc Zyngier
2016-10-26 13:41 ` Fu Wei
2016-11-11 13:43 ` Hanjun Guo
2016-11-11 13:46 ` Hanjun Guo
2016-11-11 13:58 ` Hanjun Guo
2016-11-11 15:32 ` Mark Rutland
2016-09-28 18:17 ` [PATCH v14 5/9] clocksource/drivers/arm_arch_timer: Simplify ACPI support code fu.wei
2016-10-20 16:58 ` Mark Rutland [this message]
2016-10-21 11:14 ` Mark Rutland
2016-10-21 11:21 ` Mark Rutland
2016-10-26 8:54 ` Fu Wei
2016-11-11 13:55 ` Hanjun Guo
2016-09-28 18:17 ` [PATCH v14 6/9] acpi/arm64: Add memory-mapped timer support in GTDT driver fu.wei
2016-10-21 11:19 ` Mark Rutland
2016-09-28 18:17 ` [PATCH v14 7/9] clocksource/drivers/arm_arch_timer: Refactor the timer init code to prepare for GTDT fu.wei
2016-10-21 11:32 ` Mark Rutland
2016-10-26 15:24 ` Fu Wei
2016-10-26 15:46 ` Mark Rutland
2016-10-26 16:07 ` Fu Wei
2016-09-28 18:17 ` [PATCH v14 8/9] clocksource/drivers/arm_arch_timer: Add GTDT support for memory-mapped timer fu.wei
2016-09-28 18:17 ` [PATCH v14 9/9] acpi/arm64: Add SBSA Generic Watchdog support in GTDT driver fu.wei
2016-09-30 0:40 ` [PATCH v14 0/9] acpi, clocksource: add GTDT driver and GTDT support in arm_arch_timer Xiongfeng Wang
2016-10-05 17:26 ` Fu Wei
2016-10-20 14:31 ` Mark Rutland
2016-10-20 14:57 ` Lorenzo Pieralisi
2016-10-20 15:17 ` Mark Rutland
2016-10-26 8:24 ` Fu Wei
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