From: Rob Herring <robh@kernel.org>
To: Viresh Kumar <viresh.kumar@linaro.org>
Cc: "Jason Wang" <jasowang@redhat.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
"Arnd Bergmann" <arnd@kernel.org>,
"Jean-Philippe Brucker" <jean-philippe@linaro.org>,
"Linus Walleij" <linus.walleij@linaro.org>,
"Bartosz Golaszewski" <bgolaszewski@baylibre.com>,
"Vincent Guittot" <vincent.guittot@linaro.org>,
"Bill Mills" <bill.mills@linaro.org>,
"Alex Bennée" <alex.bennee@linaro.org>,
"Enrico Weigelt, metux IT consult" <info@metux.net>,
"Jie Deng" <jie.deng@intel.com>,
devicetree@vger.kernel.org,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"open list:DRM DRIVER FOR QEMU'S CIRRUS DEVICE"
<virtualization@lists.linux-foundation.org>,
"Arnd Bergmann" <arnd@arndb.de>,
"open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>
Subject: Re: [PATCH V4 3/5] dt-bindings: gpio: Add bindings for gpio-virtio
Date: Tue, 3 Aug 2021 09:47:42 -0600 [thread overview]
Message-ID: <CAL_JsqJ6_ktTQKiy_xx9DhjQ3=imfvSZpBem5fXwVY7O49EgCw@mail.gmail.com> (raw)
In-Reply-To: <20210803043014.paskwghdio6azplp@vireshk-i7>
n Mon, Aug 2, 2021 at 10:30 PM Viresh Kumar <viresh.kumar@linaro.org> wrote:
>
> On 02-08-21, 13:40, Rob Herring wrote:
> > Humm, how does one implement interrupts without a parent interrupt? It
> > uses the parent virtio,mmio interrupt?
>
> Kind of, yeah, but not necessarily.
>
> The interrupt information is passed over buffers shared between host and guest.
> Now the guest may process the buffers when it receives a notification from the
> host, that will be at downpath of an interrupt for virtio,mmio. Or the guest may
> poll on the virtqueue and process any buffers as soon as they are made
> available, no interrupts then.
Okay, thanks for the explanation.
Reviewed-by: Rob Herring <robh@kernel.org>
Rob
next prev parent reply other threads:[~2021-08-03 15:47 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-27 5:23 [PATCH V4 0/5] virtio: Add virtio-device bindings Viresh Kumar
2021-07-27 5:23 ` [PATCH V4 1/5] dt-bindings: virtio: Add binding for virtio devices Viresh Kumar
2021-07-27 7:51 ` Arnd Bergmann
2021-08-02 19:40 ` Rob Herring
2021-07-27 5:23 ` [PATCH V4 2/5] dt-bindings: i2c: Add bindings for i2c-virtio Viresh Kumar
2021-08-02 19:41 ` Rob Herring
2021-07-27 5:23 ` [PATCH V4 3/5] dt-bindings: gpio: Add bindings for gpio-virtio Viresh Kumar
2021-08-02 19:40 ` Rob Herring
2021-08-03 4:30 ` Viresh Kumar
2021-08-03 15:47 ` Rob Herring [this message]
2021-08-04 3:49 ` Viresh Kumar
2021-07-27 5:23 ` [PATCH V4 4/5] uapi: virtio_ids: Sync ids with specification Viresh Kumar
2021-07-27 5:23 ` [PATCH V4 5/5] virtio: Bind virtio device to device-tree node Viresh Kumar
2021-08-04 3:56 ` [PATCH V4 0/5] virtio: Add virtio-device bindings Viresh Kumar
2021-08-11 5:38 ` Viresh Kumar
2021-08-31 5:31 ` Viresh Kumar
2021-08-31 14:25 ` Michael S. Tsirkin
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