Re: [SeaBIOS] [PATCH] Add pvevent device driver

[Gleb Natapov]

On Thu, Mar 14, 2013 at 04:48:47PM +0800, Hu Tao wrote:
> pvevent device is used to notify host(qemu) when guest panic
> happens.
>
> ref: http://lists.nongnu.org/archive/html/qemu-devel/2013-03/msg02293.html
> Signed-off-by: Hu Tao
>
> src/acpi-dsdt-isa.dsl | 30 ++++++++++++++++++++++++++++++
>  1 file changed, 30 insertions(+)
>
> diff --git a/src/acpi-dsdt-isa.dsl b/src/acpi-dsdt-isa.dsl
> index 23761db..d083245 100644
> --- a/src/acpi-dsdt-isa.dsl
> +++ b/src/acpi-dsdt-isa.dsl
> @@ -99,4 +99,34 @@ Scope(_SB.PCI0.ISA) {
>              IRQNoFlags() { 3 }
>          })
>      }
> Device(PEVT) {
>    Name(_HID, "MSFT0001")

We cannot use MSFT!
>    OperationRegion(PEOR, SystemIO, 0x0505, 0x01)

IO port should be received form QEMU by fw_cfg and patched here at run time.
>    Field(PEOR, ByteAcc, NoLock, Preserve) {
>        PEPT,   8,
>    }
>    Method(_STA, 0, NotSerialized) {
>        Store(PEPT, Local0)
>        If (LEqual(Local0, Zero)) {
>            Return (0x00)
>        } Else {
>            Return (0x0F)
>        }
>    }

No probing. If QEMU does not provide IO port function should be patched
to return zero.
>    Method(RDPT, 0, NotSerialized) {
>        Store(PEPT, Local0)
>        Return (Local0)
>    }
>    Method(WRPT, 1, NotSerialized) {
>        Store(Arg0, PEPT)
>    }
>    Name(_CRS, ResourceTemplate() {
>        IO(Decode16, 0x0505, 0x0505, 0x01, 0x01)
>    })
> }
> }
>
> 1.8.1.4