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Re: [Qemu-devel] [PATCH] kvm: Fix memory slot page alignment logic
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From: |
Alexander Graf |
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Subject: |
Re: [Qemu-devel] [PATCH] kvm: Fix memory slot page alignment logic |
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Date: |
Mon, 10 Nov 2014 15:48:54 +0100 |
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User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 |
On 10.11.14 14:55, Peter Maydell wrote:
> On 10 November 2014 13:16, Alexander Graf <address@hidden> wrote:
>> Sorry, I don't understand this paragraph. Memory slots in general are
>> accelerations for memory access - for MMIO (RAM is usually aligned), KVM
>> can always exit to QEMU and just do a manual MMIO exit.
>
> ...you're a bit stuck if you were hoping to execute code from
> that RAM, though, so they're not *purely* acceleration, right?
Yes and no. Technically, there's no reason KVM couldn't do an MMIO exit
dance to fetch the next instruction. From user space this should be
indistinguishable.
Today, I don't think it's implemented though :).
Alex