[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v3 1/7] xen-pciback: Document the various parameters and attributes in SysFS
On 08/07/14 19:58, konrad@xxxxxxxxxx wrote: > From: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> > > Which hadn't been done with the initial commit. [...] > --- /dev/null > +++ b/Documentation/ABI/testing/sysfs-driver-pciback > @@ -0,0 +1,84 @@ > +What: /sys//module/xen_pciback/parameters/verbose_request It's my understanding that module parameters are not typically part of the ABI. > +What: /sys/module/xen_pciback/parameters/permissive > +Date: Oct 2011 > +KernelVersion: 3.1 > +Contact: xen-devel@xxxxxxxxxxxxxxxxxxxx > +Description: > + Allow non-emulated (raw) access to PCI configuration space by > + the guest frontend. This can have adverse affect as the guest > + can destabilize the initial domain. WTF? Why does it even have such an unsafe option? > +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. This should be a device property or something in debugfs. > +What: /sys/bus/pci/drivers/pciback/irq_handler_state > +Date: Oct 2011 > +KernelVersion: 3.1 > +Contact: xen-devel@xxxxxxxxxxxxxxxxxxxx > +Description: > + An option to toggle Xen PCI back to acknowledge (or stop) > + interrupts for the specific device regardless of whether the > + device is shared, enabled, or on a level interrupt line. > + Writing a string of DDDD:BB:DD.F will toggle the state. > + This is Domain:Bus:Device.Function where domain is optional. I do not understand under what circumstances this should be used in. David _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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