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Re: [Qemu-devel] [PATCH] dma/rc4030: do multiple calls to address_space_
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From: |
Paolo Bonzini |
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Subject: |
Re: [Qemu-devel] [PATCH] dma/rc4030: do multiple calls to address_space_rw when doing DMA transfers |
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Date: |
Wed, 17 Jun 2015 21:15:00 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 |
On 17/06/2015 20:31, Hervé Poussineau wrote:
>>
>
> Sure. It works well for my test case. Thanks Paolo!
>
> However, it breaks PC machines.
> mtree gives:
> 0000000000000cf8-0000000000000cfb (prio 0, RW): pci-conf-idx
> 0000000000000cf9-0000000000000cf9 (prio 1, RW): piix3-reset-control
> "make check" wants to write 4 bytes to 0xcf8. Your patch makes it write
> only 1 byte, and bad things happen.
Yup, that's the same as the Windows XP breakage. Thanks for the test!
Paolo