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Re: [Qemu-devel] [RFC PATCH 1/3] configure: disable Xen PCI Passthrough
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From: |
Paolo Bonzini |
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Subject: |
Re: [Qemu-devel] [RFC PATCH 1/3] configure: disable Xen PCI Passthrough on !x86 archs |
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Date: |
Tue, 11 Jul 2017 18:31:36 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.0 |
On 11/07/2017 18:26, Alex Bennée wrote:
>> It seems our minds crossed at the same time since Alex/Pablo fixed it
>> and got merged in master as b5ed2e11ef39 "build: disable Xen on ARM"
>> so this patch is no more necessary.
>>
>> Alex/Pablo, any thought on patch 2 regarding xen-mapcache.h?
>
> Pass, I know little of Xen on ARM other than I think it doesn't need
> QEMU for device emulation. IIRC the use of QEMU on x86 is to handle the
> weird set of devices you can get on a PC without bloating the
> hypervisor. ARM is a lot simpler in that regard.
Yes, my understanding is that Xen on ARM doesn't need the mapcache.
Another thing being discussed a few years ago was the creation of
qemu-system-xenpv (aka xenpv-softmmu), where the same code would run on
x86 or ARM. It would never support TCG, so the --disable-tcg patches
would be a prerequisite for that.
Paolo