From: Viresh Kumar <viresh.kumar@linaro.org>
To: Rob Herring <robh@kernel.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,
virtualization@lists.linux-foundation.org,
"Arnd Bergmann" <arnd@arndb.de>,
linux-gpio@vger.kernel.org
Subject: Re: [PATCH V4 3/5] dt-bindings: gpio: Add bindings for gpio-virtio
Date: Tue, 3 Aug 2021 10:00:14 +0530 [thread overview]
Message-ID: <20210803043014.paskwghdio6azplp@vireshk-i7> (raw)
In-Reply-To: <YQhKKyPmOUE8z+US@robh.at.kernel.org>
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.
--
viresh
WARNING: multiple messages have this Message-ID (diff)
From: Viresh Kumar <viresh.kumar@linaro.org>
To: Rob Herring <robh@kernel.org>
Cc: Arnd Bergmann <arnd@kernel.org>,
Vincent Guittot <vincent.guittot@linaro.org>,
Arnd Bergmann <arnd@arndb.de>,
Jean-Philippe Brucker <jean-philippe@linaro.org>,
"Enrico Weigelt, metux IT consult" <info@metux.net>,
"Michael S. Tsirkin" <mst@redhat.com>,
linux-kernel@vger.kernel.org,
virtualization@lists.linux-foundation.org,
Bartosz Golaszewski <bgolaszewski@baylibre.com>,
devicetree@vger.kernel.org, linux-gpio@vger.kernel.org,
Linus Walleij <linus.walleij@linaro.org>,
Bill Mills <bill.mills@linaro.org>
Subject: Re: [PATCH V4 3/5] dt-bindings: gpio: Add bindings for gpio-virtio
Date: Tue, 3 Aug 2021 10:00:14 +0530 [thread overview]
Message-ID: <20210803043014.paskwghdio6azplp@vireshk-i7> (raw)
In-Reply-To: <YQhKKyPmOUE8z+US@robh.at.kernel.org>
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.
--
viresh
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Virtualization@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/virtualization
next prev parent reply other threads:[~2021-08-03 4:30 UTC|newest]
Thread overview: 33+ 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 ` Viresh Kumar
2021-07-27 5:23 ` [PATCH V4 1/5] dt-bindings: virtio: Add binding for virtio devices Viresh Kumar
2021-07-27 5:23 ` Viresh Kumar
2021-07-27 7:51 ` Arnd Bergmann
2021-08-02 19:40 ` Rob Herring
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
2021-07-27 5:23 ` Viresh Kumar
2021-08-02 19:41 ` Rob Herring
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
2021-07-27 5:23 ` Viresh Kumar
2021-08-02 19:40 ` Rob Herring
2021-08-02 19:40 ` Rob Herring
2021-08-03 4:30 ` Viresh Kumar [this message]
2021-08-03 4:30 ` Viresh Kumar
2021-08-03 15:47 ` Rob Herring
2021-08-03 15:47 ` Rob Herring
2021-08-04 3:49 ` Viresh Kumar
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 ` Viresh Kumar
2021-07-27 5:23 ` [PATCH V4 5/5] virtio: Bind virtio device to device-tree node Viresh Kumar
2021-07-27 5:23 ` Viresh Kumar
2021-08-04 3:56 ` [PATCH V4 0/5] virtio: Add virtio-device bindings Viresh Kumar
2021-08-04 3:56 ` Viresh Kumar
2021-08-11 5:38 ` Viresh Kumar
2021-08-11 5:38 ` Viresh Kumar
2021-08-31 5:31 ` Viresh Kumar
2021-08-31 5:31 ` Viresh Kumar
2021-08-31 14:25 ` Michael S. Tsirkin
2021-08-31 14:25 ` Michael S. Tsirkin
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