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Re: [Qemu-devel] [PATCH 1/2] target-arm: sort TCG cpreg list by 64bit id
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From: |
Peter Maydell |
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Subject: |
Re: [Qemu-devel] [PATCH 1/2] target-arm: sort TCG cpreg list by 64bit id version |
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Date: |
Mon, 14 Oct 2013 12:09:33 +0100 |
On 14 October 2013 11:45, alvise rigo <address@hidden> wrote:
> Sorry, I should have mentioned that an improper sorting of the cpreg_list
> could lead to a migration failure when cpu_post_load considers an incoming
> register as missing in the cpreg_indexes array.
> However, as long as the two lists are exactly the same, the problem does not
> occur.
Yeah, makes sense. Note that this is an entirely theoretical
problem at the moment: TCG<->KVM migration isn't supported
and won't work because the set of coprocessor registers
each supports is different. (At some point we should probably
fix this by getting TCG to support the right set of regs, but
it's not a very high priority for me.)
-- PMM