[Xen-devel] Re: [PATCH][ioemu] fix PCI bar mapping

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Yuji Shimada writes ("Re: [PATCH][ioemu] fix PCI bar mapping"):
> pt_pci_read_config should not be used to read configuration registers.
> pt_pci_read_config emulates access to read the registers from guest
> software. Many functions which are not relevant are executed in
> pt_pci_read_config. So side effects may occur. Instead, you can use
> pc_read_word of libpci just to read configuration registers.

Should we be reverting Cui's patch and fix the problem some other
way ?

> Or, there is another approach. It is that you remove emu_mask from
> writable_mask in pt_cmd_reg_write. Then you can get the proper value
> from reg_entry->data.

It would be nice to get this sorted for the 3.4 release, which is
imminent ...

Ian.

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