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Re: [Qemu-devel] [PATCH v8 8/8] vmport: Add VMware all ring hack
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH v8 8/8] vmport: Add VMware all ring hack |
Date: |
Fri, 3 Jul 2015 15:50:19 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.0.1 |
On 03/07/2015 15:08, Don Slutz wrote:
>>>
>> Creating it at the pc level and propagating makes code
>> messy but I'd go along with it if it made sense from
>> user's point of view, but it does not seem to make sense:
>> to me this looks more like a CPU feature than a machine property.
>> Or the property of the vmport rpc device that you created.
>
> Well this is not a clear area. It does look more like a CPU feature. I
> went with a machine feature because that is where "vmport" currently is.
I think it should be a vmport property.
It would be cleaner to implement it using the MemTxAttrs mechanism, but
for KVM I'm afraid it would be too slow (and the slowness would affect
all I/O accesses, not just vmport ones, unless really ugly hacks are done).
Paolo