On Sun, Sep 4, 2016 at 7:38 AM, Namhyung Kim <namhyung@xxxxxxxxxx> 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 <pbonzini@xxxxxxxxxx> > Cc: Radim Krčmář <rkrcmar@xxxxxxxxxx> > Cc: "Michael S. Tsirkin" <mst@xxxxxxxxxx> > Cc: Anthony Liguori <aliguori@xxxxxxxxxx> > Cc: Anton Vorontsov <anton@xxxxxxxxxx> > Cc: Colin Cross <ccross@xxxxxxxxxxx> > Cc: Kees Cook <keescook@xxxxxxxxxxxx> > Cc: Tony Luck <tony.luck@xxxxxxxxx> > Cc: Steven Rostedt <rostedt@xxxxxxxxxxx> > Cc: Ingo Molnar <mingo@xxxxxxxxxx> > Cc: Minchan Kim <minchan@xxxxxxxxxx> > Cc: Will Deacon <will.deacon@xxxxxxx> > Cc: virtio-dev@xxxxxxxxxxxxxxxxxxxx > Cc: kvm@xxxxxxxxxxxxxxx > Cc: qemu-devel@xxxxxxxxxx > Cc: virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx > Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx> While I can't speak to the virtio parts, the interface into pstore looks fine to me. :) Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx> -Kees -- Kees Cook Nexus Security -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
