Re: PCI pass through Xen 4.1.x and NetBSD 6

[Roger Pau Monné <roger.pau%citrix.com@localhost>]

On 23/01/13 23:37, Manuel Bouyer wrote:
> On Wed, Jan 23, 2013 at 10:32:40PM +0100, Marcus Osdoba wrote:
>> Am 22.01.2013 22:04, schrieb Marcus Osdoba:
>>> Unfortunatly I still got an error when starting the hvm domu with xl:
>>> libxl: error: libxl_pci.c:750:libxl_device_pci_reset The kernel doesn't
>>> support reset from sysfs for PCI device 0000:02:00.0
>>> libxl: error: libxl_pci.c:750:libxl_device_pci_reset The kernel doesn't
>>> support reset from sysfs for PCI device 0000:04:00.0
>>>
>> I have found the relevant function in xl and the following posts
>> [0],[1] and [2].
>>
>> Anyway, the patch in patch-libxl_libxl_internal.h leaves /sys/..
>> enabled ( #define SYSFS_PCI_DEV          "/sys/bus/pci/devices"),
>> which is used by the pci reset function in xl.
>>
>> /sys is not present by default in netbsd.
>> I didn't find any compatibility /sys in pkgsrc or sys/compat.
>>
>> Does PCI pass through ought to work without /sys (which might NOT
>> when verifying the relevant libxl_device_pci_reset function).
> 
> It has worked at some point, but I've not tested for a long time.
> At first glance, I'd say that libxl_device_pci_reset() should be empty for
> NetBSD.

You can move this function to libxl_linux.c and create an empty function
for NetBSD in libxl_netbsd.c (or fill it with whatever is necessary for
NetBSD).