[Xen-devel] One question to lowlevel/xl/xl.c and lowlevel/xc/xc.c

["Chen, Tiejun" <tiejun.chen@xxxxxxxxx>]

All guys,

Sorry to bother you.

I have a question to two files, tools/python/xen/lowlevel/xc/xc.c and 
tools/python/xen/lowlevel/xl/xl.c. Who is a caller to those methods like 
pyxc_methods[] and pyxl_methods[]? And how should we call these approaches?
In my specific case, I'm trying to introduce a new flag to each a device 
while assigning device. So this means I have to add a parameter, 'flag', 
into
int xc_assign_device(
    xc_interface *xch,
    uint32_t domid,
    uint32_t machine_sbdf)

Then this is extended as

int xc_assign_device(
    xc_interface *xch,
    uint32_t domid,
    uint32_t machine_sbdf,
    uint32_t flag)

After this introduction, obviously I should cover all cases using 
xc_assign_device(). And also I found this fallout goes into these two 
files. For example, here pyxc_assign_device() is involved. Currently it 
has two parameters, 'dom' and 'pci_str', and as I understand 'pci_str' 
should represent all pci devices with SBDF format, right?
But I don't know exactly what rule should be complied to construct this 
sort of flag into 'pci_str', or any reasonable idea to achieve my goal?
Thanks
Tiejun

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