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Re: [Qemu-devel] Announcing qboot, a minimal x86 firmware for QEMU

From: Paolo Bonzini
Subject: Re: [Qemu-devel] Announcing qboot, a minimal x86 firmware for QEMU
Date: Wed, 27 May 2015 14:05:46 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0

On 27/05/2015 13:54, Peter Maydell wrote:
> On 27 May 2015 at 10:30, Paolo Bonzini <address@hidden> 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. :)


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