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[Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver |
Date: |
Sun, 28 Mar 2010 10:47:54 +0300 |
User-agent: |
Mutt/1.5.19 (2009-01-05) |
On Sat, Mar 27, 2010 at 08:48:34PM +0300, Avi Kivity wrote:
> On 03/26/2010 07:14 PM, Cam Macdonell wrote:
>>
>>> I'm not familiar with the uio internals, but for the interface, an ioctl()
>>> on the fd to assign an eventfd to an MSI vector. Similar to ioeventfd, but
>>> instead of mapping a doorbell to an eventfd, it maps a real MSI to an
>>> eventfd.
>>>
>> uio will never support ioctls.
>
> Why not?
>
>> Maybe irqcontrol could be extended?
>>
>
> What's irqcontrol?
uio accepts 32 bit writes to the char device file. We can encode
the fd number there, and use the high bit to signal assign/deassign.
> --
> Do not meddle in the internals of kernels, for they are subtle and quick to
> panic.
[Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Avi Kivity, 2010/03/25
- [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Cam Macdonell, 2010/03/25
- [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Avi Kivity, 2010/03/25
- [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Cam Macdonell, 2010/03/26
- [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Avi Kivity, 2010/03/27
- [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver,
Michael S. Tsirkin <=
- [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Avi Kivity, 2010/03/28
- [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Michael S. Tsirkin, 2010/03/28
- [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Avi Kivity, 2010/03/28
- [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Michael S. Tsirkin, 2010/03/28
- [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Avi Kivity, 2010/03/28
- Re: [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Jamie Lokier, 2010/03/28
- Re: [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, malc, 2010/03/28
[Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Cam Macdonell, 2010/03/28
[Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Avi Kivity, 2010/03/29
[Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Cam Macdonell, 2010/03/30