Alex, > On Sep 11, 2015, at 11:16 AM, Alex Williamson <[email protected]> > wrote: > > RFC - Is this something we should do?
Superficially this looks pretty good. I need to think harder to be sure of the
details.
> Should we consider providing
> similar emulation through PCI sysfs to allow lspci to also make use
> of the vpd interfaces?
It looks to me like lspci already uses the vpd attribute in sysfs to access
VPD, so maybe nothing more than this is needed. No doubt lspci can be coerced
into accessing VPD directly, but is that really worth going after? I'm not so
sure.
An strace of lspci accessing a device with VPD shows me:
write(1, "\tCapabilities: [e0] Vital Produc"..., 39 Capabilities: [e0]
Vital Product Data
) = 39
open("/sys/bus/pci/devices/0000:02:00.0/vpd", O_RDONLY) = 4
----------------------------------------^^^ accesses to this should be safe, I
think
pread(4, "\202", 1, 0) = 1
pread(4, "\10\0", 2, 1) = 2
pread(4, "PVL Dell", 8, 3) = 8
write(1, "\t\tProduct Name: PVL Dell\n", 25 Product Name: PVL Dell
) = 25
and so forth.
--
Mark Rustad, Networking Division, Intel Corporation
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