Re: [Qemu-devel] [PATCH v3 1/3] ich9: add TCO interface emulation

[Paulo Alcantara]

On Mon, June 1, 2015 8:48 pm, Paulo Alcantara wrote:
> This interface provides some registers within a 32-byte range and can be
> acessed through PCI-to-LPC bridge interface (PMBASE + 0x60).
>
> It's commonly used as a watchdog timer to detect system lockups through
> SMIs that are generated -- if TCO_EN bit is set -- on every timeout. If
> NO_REBOOT bit is not set in GCS (General Control and Status register),
> the system will be resetted upon second timeout if TCO_RLD register
> wasn't previously written to prevent timeout.
>
> This patch adds support to TCO watchdog logic and few other features
> like mapping NMIs to SMIs (NMI2SMI_EN bit), system intruder detection,
> etc. are not implemented yet.
>
> v1 -> v2:
>   * add migration support for TCO I/O device state
>   * wake up only when total time expired instead of every 0.6s
>   * some cleanup suggested by Paolo Bonzini
> v2 -> v3:
>   * set SECOND_TO_STS and BOOT_STS bits in TCO2_STS instead
>   * improve handling of TCO_LOCK bit in TCO1_CNT register

Michael, ping? :-)

(looks like there's a lot of ICH9 changes since this patchset was sent, so
you want me to rebase it against master and resend, please let me know)

Thanks,

Paulo

-- 
Paulo Alcantara, C.E.S.A.R
Speaking for myself only.