On Sun, Sep 4, 2016 at 7:38 AM, Namhyung Kim <[email protected]> wrote: > The virtio pstore driver provides interface to the pstore subsystem so > that the guest kernel's log/dump message can be saved on the host > machine. Users can access the log file directly on the host, or on the > guest at the next boot using pstore filesystem. It currently deals with > kernel log (printk) buffer only, but we can extend it to have other > information (like ftrace dump) later. > > It supports legacy PCI device using a 16K buffer by default and it's > configurable. It uses two virtqueues - one for (sync) read and another > for (async) write. Since it cannot wait for write finished, it supports > up to 128 concurrent IO. > > Cc: Paolo Bonzini <[email protected]> > Cc: Radim Krčmář <[email protected]> > Cc: "Michael S. Tsirkin" <[email protected]> > Cc: Anthony Liguori <[email protected]> > Cc: Anton Vorontsov <[email protected]> > Cc: Colin Cross <[email protected]> > Cc: Kees Cook <[email protected]> > Cc: Tony Luck <[email protected]> > Cc: Steven Rostedt <[email protected]> > Cc: Ingo Molnar <[email protected]> > Cc: Minchan Kim <[email protected]> > Cc: Will Deacon <[email protected]> > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Signed-off-by: Namhyung Kim <[email protected]>
While I can't speak to the virtio parts, the interface into pstore looks fine to me. :) Reviewed-by: Kees Cook <[email protected]> -Kees -- Kees Cook Nexus Security
