[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v5 1/6] xen-pciback: Document the various parameters and attributes in SysFS
On Mon, Jul 28, 2014 at 02:04:18PM +0100, David Vrabel wrote: > On 14/07/14 17:18, Konrad Rzeszutek Wilk wrote: > > Which hadn't been done with the initial commit. > > > > Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> > > --- > > v2: Dropped the parameters and one that is unlikeable. > > --- > > Documentation/ABI/testing/sysfs-driver-pciback | 25 > > +++++++++++++++++++++++++ > > 1 file changed, 25 insertions(+) > > create mode 100644 Documentation/ABI/testing/sysfs-driver-pciback > > > > diff --git a/Documentation/ABI/testing/sysfs-driver-pciback > > b/Documentation/ABI/testing/sysfs-driver-pciback > > new file mode 100644 > > index 0000000..cdc8340 > > --- /dev/null > > +++ b/Documentation/ABI/testing/sysfs-driver-pciback > > @@ -0,0 +1,25 @@ > > +What: /sys/bus/pci/drivers/pciback/quirks > > +Date: Oct 2011 > > +KernelVersion: 3.1 > > +Contact: xen-devel@xxxxxxxxxxxxxxxxxxxx > > +Description: > > + If the permissive attribute is set, then writing a string > > in > > + the format of DDDD:BB:DD.F-REG:SIZE:MASK will allow the > > guest > > + to write and read from the PCI device. That is Domain:Bus: > > "...write and read the PCI device's configuration space." How is this different from the normal pci device config file? > > > + Device.Function-Register:Size:Mask (Domain is optional). > > + For example: > > + #echo 00:19.0-E0:2:FF > /sys/bus/pci/drivers/pciback/quirks > > + will allow the guest to read and write to the configuration > > + register 0x0E. > > + > > +What: /sys/bus/pci/drivers/pciback/irq_handlers > > +Date: Oct 2011 > > +KernelVersion: 3.1 > > +Contact: xen-devel@xxxxxxxxxxxxxxxxxxxx > > +Description: > > + A list of all of the PCI devices owned by Xen PCI back and > > + whether Xen PCI backend will acknowledge the interrupts > > received > > + and the amount of interrupts received. Xen PCI back > > acknowledges > > + said interrupts only when they are level, shared with > > another > > + guest, and enabled by the guest. > > That's not very nice sysfs file. This sort of thing ought to be in > debugfs. Perhaps we shouldn't document it for now and try to move it to > debugfs later? Move it to debugfs now would be better, that's not an acceptable sysfs file at all, thanks for pointing it out. thanks, greg k-h _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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