| Message ID | 1364267011-31975-1-git-send-email-hutao@cn.fujitsu.com |
|---|---|
| State | New |
| Headers | show |
Il 26/03/2013 04:03, Hu Tao ha scritto: > Signed-off-by: Hu Tao <hutao@cn.fujitsu.com> > --- > docs/specs/pvpanic.txt | 35 +++++++++++++++++++++++++++++++++++ > 1 file changed, 35 insertions(+) > create mode 100644 docs/specs/pvpanic.txt > > diff --git a/docs/specs/pvpanic.txt b/docs/specs/pvpanic.txt > new file mode 100644 > index 0000000..1f14063 > --- /dev/null > +++ b/docs/specs/pvpanic.txt > @@ -0,0 +1,35 @@ > +PVPANIC DEVICE > +============== > + > +pvpanic device is a simulated ISA device, through which a guest panic > +event is sent to qemu, and a QMP event is generated. This allows > +management apps (e.g. libvirt) to be notified and respond to the event. > + > +The management app has the option of waiting for GUEST_PANICKED events, > +and/or polling for guest-panicked RunState, to learn when the pvpanic > +device has fired a panic event. > + > +ISA Interface > +------------- > + > +pvpanic uses port 0x505 to receive a panic event from the guest. On > +written, bit 0 is set to indicate guest panic has happened. On read, bit > +0 is set to indicate guest panic notification is supported. > + > +ACPI Interface > +-------------- > + > +pvpanic device is defined with ACPI ID "QEMU0001". Custom methods: > + > +RDPT: To determine whether guest panic notification is supported. > +Rrguments: None > +Return: Returns a byte, bit 0 set to indicate guest panic > + notification is supported. > + > +WRPT: To send a guest panic event > +Arguments: Arg0 is a byte, with bit 0 set to indicate guest panic has > + happened. > +Return: None > + > +The ACPI device will automatically refer to the right port in case it > +is modified. > Looks good. Paolo
On 03/25/2013 09:03 PM, Hu Tao wrote: > Signed-off-by: Hu Tao <hutao@cn.fujitsu.com> > --- > docs/specs/pvpanic.txt | 35 +++++++++++++++++++++++++++++++++++ > 1 file changed, 35 insertions(+) > create mode 100644 docs/specs/pvpanic.txt > +ISA Interface > +------------- > + > +pvpanic uses port 0x505 to receive a panic event from the guest. On > +written, bit 0 is set to indicate guest panic has happened. On read, bit s/written/write/ Also, mention that the remaining bits are reserved, and should be written as 0, and ignored on read (that way, the spec can be updated when we define a later bit, and older hosts won't be trying to set or act on bits they don't understand). > +ACPI Interface > +-------------- > + > +pvpanic device is defined with ACPI ID "QEMU0001". Custom methods: > + > +RDPT: To determine whether guest panic notification is supported. > +Rrguments: None > +Return: Returns a byte, bit 0 set to indicate guest panic > + notification is supported. > + > +WRPT: To send a guest panic event > +Arguments: Arg0 is a byte, with bit 0 set to indicate guest panic has > + happened. Again, documenting that the remaining bits are reserved (write 0, ignore on read) is a wise addition.
diff --git a/docs/specs/pvpanic.txt b/docs/specs/pvpanic.txt new file mode 100644 index 0000000..1f14063 --- /dev/null +++ b/docs/specs/pvpanic.txt @@ -0,0 +1,35 @@ +PVPANIC DEVICE +============== + +pvpanic device is a simulated ISA device, through which a guest panic +event is sent to qemu, and a QMP event is generated. This allows +management apps (e.g. libvirt) to be notified and respond to the event. + +The management app has the option of waiting for GUEST_PANICKED events, +and/or polling for guest-panicked RunState, to learn when the pvpanic +device has fired a panic event. + +ISA Interface +------------- + +pvpanic uses port 0x505 to receive a panic event from the guest. On +written, bit 0 is set to indicate guest panic has happened. On read, bit +0 is set to indicate guest panic notification is supported. + +ACPI Interface +-------------- + +pvpanic device is defined with ACPI ID "QEMU0001". Custom methods: + +RDPT: To determine whether guest panic notification is supported. +Rrguments: None +Return: Returns a byte, bit 0 set to indicate guest panic + notification is supported. + +WRPT: To send a guest panic event +Arguments: Arg0 is a byte, with bit 0 set to indicate guest panic has + happened. +Return: None + +The ACPI device will automatically refer to the right port in case it +is modified.
Signed-off-by: Hu Tao <hutao@cn.fujitsu.com> --- docs/specs/pvpanic.txt | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 docs/specs/pvpanic.txt