From: Paolo Bonzini <pbonzini@redhat.com>
To: Peter Maydell <peter.maydell@linaro.org>
Cc: Christopher Covington <cov@codeaurora.org>,
"Daniel P. Berrange" <berrange@redhat.com>,
qemu-devel <qemu-devel@nongnu.org>,
KVM list <kvm@vger.kernel.org>
Subject: Re: [Qemu-devel] Announcing qboot, a minimal x86 firmware for QEMU
Date: Wed, 27 May 2015 14:05:46 +0200 [thread overview]
Message-ID: <5565B31A.7070301@redhat.com> (raw)
In-Reply-To: <CAFEAcA9bu2FtLjXHZs7nuno3p9sxJ_yBHBzGhL_0wd4on6BjXg@mail.gmail.com>
On 27/05/2015 13:54, Peter Maydell wrote:
> On 27 May 2015 at 10:30, Paolo Bonzini <pbonzini@redhat.com> wrote:
>> > For example, ARM's "-M virt" uses a pl011 block for the RTC, and also
>> > uses fw_cfg. Another commonly used ISA device is the UART, for which
>> > again -M virt uses a pl031.
> Partly we do that because there were a number of reports that trying
> to use virtio for the console didn't work reliably... Using the
> stock UART that is widely supported in UEFI/uboot/kernel was a
> conservative design choice.
>
> The next thing that's likely to appear in "virt" is a PL061
> GPIO device, which you need for CPU hotplug and external-shutdown-request
> notifications.
Indeed, and the x86 Q35 chipset puts the ACPI registers... in the
ISA/LPC bridge. :)
Paolo
WARNING: multiple messages have this Message-ID (diff)
From: Paolo Bonzini <pbonzini@redhat.com>
To: Peter Maydell <peter.maydell@linaro.org>
Cc: Christopher Covington <cov@codeaurora.org>,
KVM list <kvm@vger.kernel.org>,
qemu-devel <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] Announcing qboot, a minimal x86 firmware for QEMU
Date: Wed, 27 May 2015 14:05:46 +0200 [thread overview]
Message-ID: <5565B31A.7070301@redhat.com> (raw)
In-Reply-To: <CAFEAcA9bu2FtLjXHZs7nuno3p9sxJ_yBHBzGhL_0wd4on6BjXg@mail.gmail.com>
On 27/05/2015 13:54, Peter Maydell wrote:
> On 27 May 2015 at 10:30, Paolo Bonzini <pbonzini@redhat.com> wrote:
>> > For example, ARM's "-M virt" uses a pl011 block for the RTC, and also
>> > uses fw_cfg. Another commonly used ISA device is the UART, for which
>> > again -M virt uses a pl031.
> Partly we do that because there were a number of reports that trying
> to use virtio for the console didn't work reliably... Using the
> stock UART that is widely supported in UEFI/uboot/kernel was a
> conservative design choice.
>
> The next thing that's likely to appear in "virt" is a PL061
> GPIO device, which you need for CPU hotplug and external-shutdown-request
> notifications.
Indeed, and the x86 Q35 chipset puts the ACPI registers... in the
ISA/LPC bridge. :)
Paolo
next prev parent reply other threads:[~2015-05-27 12:05 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-21 13:51 Announcing qboot, a minimal x86 firmware for QEMU Paolo Bonzini
2015-05-21 13:51 ` [Qemu-devel] " Paolo Bonzini
2015-05-21 15:48 ` Avi Kivity
2015-05-21 16:21 ` Paolo Bonzini
2015-05-21 18:28 ` Avi Kivity
2015-05-21 17:04 ` Jan Kiszka
2015-05-21 17:04 ` [Qemu-devel] " Jan Kiszka
2015-05-22 2:53 ` Yong Wang
2015-05-22 2:53 ` [Qemu-devel] " Yong Wang
2015-05-26 8:47 ` Stefan Hajnoczi
2015-05-26 8:47 ` [Qemu-devel] " Stefan Hajnoczi
2015-06-05 10:42 ` Stefan Hajnoczi
2015-06-05 10:42 ` [Qemu-devel] " Stefan Hajnoczi
2015-05-22 11:01 ` Daniel P. Berrange
2015-05-22 11:04 ` Peter Maydell
2015-05-22 11:12 ` Daniel P. Berrange
2015-05-22 11:21 ` Peter Maydell
2015-05-22 11:33 ` Daniel P. Berrange
2015-05-22 11:34 ` Gerd Hoffmann
2015-05-22 11:34 ` Gerd Hoffmann
2015-05-22 11:42 ` Markus Armbruster
2015-05-22 11:42 ` Markus Armbruster
2015-05-25 12:53 ` Paolo Bonzini
2015-05-26 21:25 ` Christopher Covington
2015-05-27 9:30 ` Paolo Bonzini
2015-05-27 9:36 ` Avi Kivity
2015-05-27 9:36 ` [Qemu-devel] " Avi Kivity
2015-05-27 11:00 ` Paolo Bonzini
2015-05-27 11:00 ` [Qemu-devel] " Paolo Bonzini
2015-05-27 11:54 ` Peter Maydell
2015-05-27 11:54 ` Peter Maydell
2015-05-27 12:05 ` Paolo Bonzini [this message]
2015-05-27 12:05 ` Paolo Bonzini
2015-05-27 12:50 ` Christopher Covington
2015-05-27 12:59 ` Paolo Bonzini
2015-05-27 16:24 ` Dr. David Alan Gilbert
2015-05-27 16:24 ` Dr. David Alan Gilbert
2015-05-22 14:06 ` Gerd Hoffmann
2015-05-22 23:23 ` Kevin O'Connor
2015-05-22 23:23 ` [Qemu-devel] " Kevin O'Connor
2015-05-23 3:55 ` Kevin O'Connor
2015-05-23 3:55 ` [Qemu-devel] " Kevin O'Connor
2015-05-25 6:21 ` Vasiliy Tolstov
2015-05-25 6:21 ` [Qemu-devel] " Vasiliy Tolstov
2015-05-25 15:05 ` Kevin O'Connor
2015-05-25 15:05 ` [Qemu-devel] " Kevin O'Connor
2015-05-25 12:52 ` Paolo Bonzini
2015-05-25 12:52 ` [Qemu-devel] " Paolo Bonzini
2015-05-25 15:11 ` Kevin O'Connor
2015-05-25 15:11 ` [Qemu-devel] " Kevin O'Connor
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