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Re: [Qemu-devel] [PATCH] pci: implement bridge filtering
From: |
Wen Congyang |
Subject: |
Re: [Qemu-devel] [PATCH] pci: implement bridge filtering |
Date: |
Wed, 14 Sep 2011 09:48:06 +0800 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.9) Gecko/20100413 Fedora/3.0.4-2.fc13 Thunderbird/3.0.4 |
At 09/05/2011 02:13 AM, Michael S. Tsirkin Write:
> Support bridge filtering on top of the memory
> API as suggested by Avi Kivity:
>
> Create a memory region for the bridge's address space. This region is
> not directly added to system_memory or its descendants. Devices under
> the bridge see this region as its pci_address_space(). The region is
> as large as the entire address space - it does not take into account
> any windows.
>
> For each of the three windows (pref, non-pref, vga), create an alias
> with the appropriate start and size. Map the alias into the bridge's
> parent's pci_address_space(), as subregions.
>
> Signed-off-by: Michael S. Tsirkin <address@hidden>
> ---
>
> The below seems to work fine for me so I applied this.
> Still need to test bridge filtering, any help with this
> appreciated.
>
I test bridge filtering, and the BAR still can be visible on guest even if
I change the memory region.
Thanks
Wen Congyang