From: Samuel Holland <samuel@sholland.org>
To: Marc Zyngier <maz@kernel.org>, Thomas Gleixner <tglx@linutronix.de>
Cc: "Samuel Holland" <samuel@sholland.org>,
"Andy Shevchenko" <andy.shevchenko@gmail.com>,
"Bartosz Golaszewski" <brgl@bgdev.pl>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Boris Ostrovsky" <boris.ostrovsky@oracle.com>,
"Borislav Petkov" <bp@alien8.de>,
"Broadcom internal kernel review list"
<bcm-kernel-feedback-list@broadcom.com>,
"Chris Zankel" <chris@zankel.net>,
"Colin Ian King" <colin.king@intel.com>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
"Dexuan Cui" <decui@microsoft.com>,
"Florian Fainelli" <f.fainelli@gmail.com>,
"Guo Ren" <guoren@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>,
"Haiyang Zhang" <haiyangz@microsoft.com>,
"Helge Deller" <deller@gmx.de>, "Ingo Molnar" <mingo@redhat.com>,
"Ivan Kokshaysky" <ink@jurassic.park.msu.ru>,
"James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
"Jan Beulich" <jbeulich@suse.com>,
"Joerg Roedel" <joro@8bytes.org>,
"Juergen Gross" <jgross@suse.com>,
"Julia Lawall" <Julia.Lawall@inria.fr>,
"K. Y. Srinivasan" <kys@microsoft.com>,
"Kees Cook" <keescook@chromium.org>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Linus Walleij" <linus.walleij@linaro.org>,
"Lorenzo Pieralisi" <lpieralisi@kernel.org>,
"Mark Rutland" <mark.rutland@arm.com>,
"Matt Turner" <mattst88@gmail.com>,
"Max Filippov" <jcmvbkbc@gmail.com>,
"Maximilian Heyne" <mheyne@amazon.de>,
"Oleksandr Tyshchenko" <oleksandr_tyshchenko@epam.com>,
"Rich Felker" <dalias@libc.org>,
"Richard Henderson" <rth@twiddle.net>,
"Rikard Falkeborn" <rikard.falkeborn@gmail.com>,
"Rob Herring" <robh@kernel.org>,
"Russell King" <linux@armlinux.org.uk>,
"Serge Semin" <fancer.lancer@gmail.com>,
"Stefano Stabellini" <sstabellini@kernel.org>,
"Stephen Hemminger" <sthemmin@microsoft.com>,
"Sven Schnelle" <svens@stackframe.org>,
"Thomas Bogendoerfer" <tsbogend@alpha.franken.de>,
"Wei Liu" <wei.liu@kernel.org>, "Wei Xu" <xuwei5@hisilicon.com>,
"Will Deacon" <will@kernel.org>,
"Yoshinori Sato" <ysato@users.sourceforge.jp>,
iommu@lists.linux-foundation.org, iommu@lists.linux.dev,
linux-alpha@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-hyperv@vger.kernel.org, linux-ia64@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org,
linux-parisc@vger.kernel.org, linux-pci@vger.kernel.org,
linux-sh@vger.kernel.org, linux-xtensa@linux-xtensa.org,
x86@kernel.org, xen-devel@lists.xenproject.org
Subject: [PATCH v3 8/8] genirq: Provide an IRQ affinity mask in non-SMP configs
Date: Fri, 1 Jul 2022 15:00:56 -0500 [thread overview]
Message-ID: <20220701200056.46555-9-samuel@sholland.org> (raw)
In-Reply-To: <20220701200056.46555-1-samuel@sholland.org>
IRQ affinity masks are not allocated in uniprocessor configurations.
This requires special case non-SMP code in drivers for irqchips which
have per-CPU enable or mask registers.
Since IRQ affinity is always the same in a uniprocessor configuration,
we can provide a correct affinity mask without allocating one per IRQ.
By returning a real cpumask from irq_data_get_affinity_mask even when
SMP is disabled, irqchip drivers which iterate over that mask will
automatically do the right thing.
Signed-off-by: Samuel Holland <samuel@sholland.org>
---
Changes in v3:
- Use cpumask_of(0) instead of cpu_possible_mask
include/linux/irq.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 02073f7a156e..996e22744edd 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -151,7 +151,9 @@ struct irq_common_data {
#endif
void *handler_data;
struct msi_desc *msi_desc;
+#ifdef CONFIG_SMP
cpumask_var_t affinity;
+#endif
#ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK
cpumask_var_t effective_affinity;
#endif
@@ -882,13 +884,19 @@ static inline int irq_data_get_node(struct irq_data *d)
static inline
const struct cpumask *irq_data_get_affinity_mask(struct irq_data *d)
{
+#ifdef CONFIG_SMP
return d->common->affinity;
+#else
+ return cpumask_of(0);
+#endif
}
static inline void irq_data_update_affinity(struct irq_data *d,
const struct cpumask *m)
{
+#ifdef CONFIG_SMP
cpumask_copy(d->common->affinity, m);
+#endif
}
static inline const struct cpumask *irq_get_affinity_mask(int irq)
--
2.35.1
next prev parent reply other threads:[~2022-07-01 20:10 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-01 20:00 [PATCH v3 0/8] genirq: Provide real IRQ affinity masks in non-SMP configs Samuel Holland
2022-07-01 20:00 ` [PATCH v3 1/8] irqchip/mips-gic: Only register IPI domain when SMP is enabled Samuel Holland
2022-07-05 13:52 ` Serge Semin
2022-07-07 8:22 ` Marc Zyngier
2022-07-07 10:45 ` Serge Semin
2022-07-07 8:50 ` [irqchip: irq/irqchip-next] " irqchip-bot for Samuel Holland
2022-07-01 20:00 ` [PATCH v3 2/8] genirq: GENERIC_IRQ_IPI depends on SMP Samuel Holland
2022-07-07 8:50 ` [irqchip: irq/irqchip-next] " irqchip-bot for Samuel Holland
2022-07-01 20:00 ` [PATCH v3 3/8] genirq: GENERIC_IRQ_EFFECTIVE_AFF_MASK " Samuel Holland
2022-07-07 8:50 ` [irqchip: irq/irqchip-next] " irqchip-bot for Samuel Holland
2022-07-01 20:00 ` [PATCH v3 4/8] genirq: Drop redundant irq_init_effective_affinity Samuel Holland
2022-07-07 8:50 ` [irqchip: irq/irqchip-next] " irqchip-bot for Samuel Holland
2022-07-01 20:00 ` [PATCH v3 5/8] genirq: Refactor accessors to use irq_data_get_affinity_mask Samuel Holland
2022-07-07 8:50 ` [irqchip: irq/irqchip-next] " irqchip-bot for Samuel Holland
2022-07-01 20:00 ` [PATCH v3 6/8] genirq: Add and use an irq_data_update_affinity helper Samuel Holland
2022-07-03 15:22 ` Oleksandr
2022-07-07 8:39 ` Marc Zyngier
2022-07-07 9:37 ` Oleksandr Tyshchenko
2022-07-07 8:50 ` [irqchip: irq/irqchip-next] " irqchip-bot for Samuel Holland
2022-07-01 20:00 ` [PATCH v3 7/8] genirq: Return a const cpumask from irq_data_get_affinity_mask Samuel Holland
2022-07-03 14:57 ` Michael Kelley (LINUX)
2022-07-03 15:04 ` Andy Shevchenko
2022-07-07 8:50 ` [irqchip: irq/irqchip-next] " irqchip-bot for Samuel Holland
2022-07-01 20:00 ` Samuel Holland [this message]
2022-07-07 8:50 ` [irqchip: irq/irqchip-next] genirq: Provide an IRQ affinity mask in non-SMP configs irqchip-bot for Samuel Holland
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=20220701200056.46555-9-samuel@sholland.org \
--to=samuel@sholland.org \
--cc=James.Bottomley@HansenPartnership.com \
--cc=Julia.Lawall@inria.fr \
--cc=andy.shevchenko@gmail.com \
--cc=bcm-kernel-feedback-list@broadcom.com \
--cc=bhelgaas@google.com \
--cc=boris.ostrovsky@oracle.com \
--cc=bp@alien8.de \
--cc=brgl@bgdev.pl \
--cc=chris@zankel.net \
--cc=colin.king@intel.com \
--cc=dalias@libc.org \
--cc=dave.hansen@linux.intel.com \
--cc=decui@microsoft.com \
--cc=deller@gmx.de \
--cc=f.fainelli@gmail.com \
--cc=fancer.lancer@gmail.com \
--cc=guoren@kernel.org \
--cc=haiyangz@microsoft.com \
--cc=hpa@zytor.com \
--cc=ink@jurassic.park.msu.ru \
--cc=iommu@lists.linux-foundation.org \
--cc=iommu@lists.linux.dev \
--cc=jbeulich@suse.com \
--cc=jcmvbkbc@gmail.com \
--cc=jgross@suse.com \
--cc=joro@8bytes.org \
--cc=keescook@chromium.org \
--cc=kw@linux.com \
--cc=kys@microsoft.com \
--cc=linus.walleij@linaro.org \
--cc=linux-alpha@vger.kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-hyperv@vger.kernel.org \
--cc=linux-ia64@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mips@vger.kernel.org \
--cc=linux-parisc@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=linux-sh@vger.kernel.org \
--cc=linux-xtensa@linux-xtensa.org \
--cc=linux@armlinux.org.uk \
--cc=lpieralisi@kernel.org \
--cc=mark.rutland@arm.com \
--cc=mattst88@gmail.com \
--cc=maz@kernel.org \
--cc=mheyne@amazon.de \
--cc=mingo@redhat.com \
--cc=oleksandr_tyshchenko@epam.com \
--cc=rikard.falkeborn@gmail.com \
--cc=robh@kernel.org \
--cc=rth@twiddle.net \
--cc=sstabellini@kernel.org \
--cc=sthemmin@microsoft.com \
--cc=svens@stackframe.org \
--cc=tglx@linutronix.de \
--cc=tsbogend@alpha.franken.de \
--cc=wei.liu@kernel.org \
--cc=will@kernel.org \
--cc=x86@kernel.org \
--cc=xen-devel@lists.xenproject.org \
--cc=xuwei5@hisilicon.com \
--cc=ysato@users.sourceforge.jp \
/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).