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Re: [Qemu-devel] Re: [PATCHv2] qemu: target library, use it in msix
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] Re: [PATCHv2] qemu: target library, use it in msix |
Date: |
Tue, 29 Sep 2009 09:19:45 +0200 |
User-agent: |
Mutt/1.5.19 (2009-01-05) |
On Sun, Sep 27, 2009 at 04:26:33PM +0200, Avi Kivity wrote:
> On 09/27/2009 04:21 PM, Michael S. Tsirkin wrote:
>>
>>> How can the caller (except in your special case) know if it has a
>>> quantity that will fit in 32 bits?
>>>
>> It's actually not unusual for devices to limit addressing to 32 bit, whatever
>> the bus supports. For example, the value might come from a 32 bit pci
>> bar, even on a 64 bit system this will get values 0 to 4G.
>>
>
> What if the caller is a device that doesn't intentionally cripple itself?
That will need a 64 bit version, even if target is 32 bit.
> --
> Do not meddle in the internals of kernels, for they are subtle and quick to
> panic.
- Re: [Qemu-devel] Re: [PATCHv2] qemu: target library, use it in msix, (continued)
- Re: [Qemu-devel] Re: [PATCHv2] qemu: target library, use it in msix, Michael S. Tsirkin, 2009/09/27
- Re: [Qemu-devel] Re: [PATCHv2] qemu: target library, use it in msix, Blue Swirl, 2009/09/27
- Re: [Qemu-devel] Re: [PATCHv2] qemu: target library, use it in msix, Michael S. Tsirkin, 2009/09/29
- Re: [Qemu-devel] Re: [PATCHv2] qemu: target library, use it in msix, Blue Swirl, 2009/09/29
- Re: [Qemu-devel] Re: [PATCHv2] qemu: target library, use it in msix, Michael S. Tsirkin, 2009/09/29
- Re: [Qemu-devel] Re: [PATCHv2] qemu: target library, use it in msix, Avi Kivity, 2009/09/29
- Re: [Qemu-devel] Re: [PATCHv2] qemu: target library, use it in msix, Michael S. Tsirkin, 2009/09/29
- Re: [Qemu-devel] Re: [PATCHv2] qemu: target library, use it in msix, Blue Swirl, 2009/09/29
- Re: [Qemu-devel] Re: [PATCHv2] qemu: target library, use it in msix, Michael S. Tsirkin, 2009/09/29
- Re: [Qemu-devel] Re: [PATCHv2] qemu: target library, use it in msix, Avi Kivity, 2009/09/27
- Re: [Qemu-devel] Re: [PATCHv2] qemu: target library, use it in msix,
Michael S. Tsirkin <=