From: Stephen Boyd <swboyd@chromium.org>
To: Maulik Shah <mkshah@codeaurora.org>,
bjorn.andersson@linaro.org, evgreen@chromium.org,
mka@chromium.org
Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
agross@kernel.org, dianders@chromium.org, rnayak@codeaurora.org,
ilina@codeaurora.org, lsrao@codeaurora.org,
Maulik Shah <mkshah@codeaurora.org>
Subject: Re: [PATCH v7 3/3] soc: qcom: rpmh: Invoke rpmh_flush for dirty caches
Date: Wed, 26 Feb 2020 14:49:43 -0800 [thread overview]
Message-ID: <158275738312.177367.16582562675135073777@swboyd.mtv.corp.google.com> (raw)
In-Reply-To: <1582694833-9407-4-git-send-email-mkshah@codeaurora.org>
Quoting Maulik Shah (2020-02-25 21:27:13)
> Add changes to invoke rpmh flush when the data in cache is dirty.
>
> This is done only if OSI is not supported in PSCI. If OSI is supported
> rpmh_flush can get invoked when the last cpu going to power collapse
Please write rpmh_flush() so we know it's a function and not a variable.
> deepest low power mode.
>
> Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
> Reviewed-by: Srinivas Rao L <lsrao@codeaurora.org>
> ---
> drivers/soc/qcom/rpmh.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/soc/qcom/rpmh.c b/drivers/soc/qcom/rpmh.c
> index 83ba4e0..839af8d 100644
> --- a/drivers/soc/qcom/rpmh.c
> +++ b/drivers/soc/qcom/rpmh.c
> @@ -12,6 +12,7 @@
> #include <linux/module.h>
> #include <linux/of.h>
> #include <linux/platform_device.h>
> +#include <linux/psci.h>
> #include <linux/slab.h>
> #include <linux/spinlock.h>
> #include <linux/types.h>
> @@ -163,6 +164,9 @@ static struct cache_req *cache_rpm_request(struct rpmh_ctrlr *ctrlr,
> unlock:
> spin_unlock_irqrestore(&ctrlr->cache_lock, flags);
>
> + if (ctrlr->dirty && !psci_has_osi_support())
Can we introduce a stub function for psci_has_osi_support() when
CONFIG_ARM_PSCI_FW=n? This driver currently has:
config QCOM_RPMH
bool "Qualcomm RPM-Hardened (RPMH) Communication"
depends on ARCH_QCOM && ARM64 || COMPILE_TEST
which implies that this will break build testing once built on something
that isn't arm64.
> + return rpmh_flush(ctrlr) ? ERR_PTR(-EINVAL) : req;
> +
> return req;
> }
>
> @@ -391,6 +395,8 @@ int rpmh_write_batch(const struct device *dev, enum rpmh_state state,
>
> if (state != RPMH_ACTIVE_ONLY_STATE) {
> cache_batch(ctrlr, req);
> + if (!psci_has_osi_support())
> + return rpmh_flush(ctrlr);
While the diff is small it is also sad that we turn around after adding
it to a list and immediately take it off the list and send it. Can't we
do this without having to do the list add/remove dance?
> return 0;
> }
>
next prev parent reply other threads:[~2020-02-26 22:49 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-26 5:27 [PATCH v6 0/3] Invoke rpmh_flush for non OSI targets Maulik Shah
2020-02-26 5:27 ` [PATCH v7 1/3] arm64: dts: qcom: sc7180: Add cpuidle low power states Maulik Shah
2020-02-26 22:37 ` Stephen Boyd
2020-02-26 5:27 ` [PATCH v7 2/3] soc: qcom: rpmh: Update dirty flag only when data changes Maulik Shah
2020-02-26 22:43 ` Stephen Boyd
2020-02-27 5:32 ` Maulik Shah
2020-02-26 5:27 ` [PATCH v7 3/3] soc: qcom: rpmh: Invoke rpmh_flush for dirty caches Maulik Shah
2020-02-26 22:49 ` Stephen Boyd [this message]
2020-02-27 5:21 ` Maulik Shah
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=158275738312.177367.16582562675135073777@swboyd.mtv.corp.google.com \
--to=swboyd@chromium.org \
--cc=agross@kernel.org \
--cc=bjorn.andersson@linaro.org \
--cc=dianders@chromium.org \
--cc=evgreen@chromium.org \
--cc=ilina@codeaurora.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=lsrao@codeaurora.org \
--cc=mka@chromium.org \
--cc=mkshah@codeaurora.org \
--cc=rnayak@codeaurora.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).