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Re: [Xen-devel] Timer going backwards and Unable to handle kernel NULLpointer

On 30/5/07 17:02, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:

> No, this is simply the port write (in acpi_hw_set_mode(), case
> obviously followed by lengthy SMM execution.

Ah, okay.

How about if we add support for ACPI PM timer as platform clock source?
Should be easy, any ACPI system will most likely provide it, and it should
be much better to use than the PIT (even a 24-bit PM timer should only wrap
every 5 seconds). We'll have to prevent dom0 monkeying with the timer:
either disallow accesses, or emulate the register.

 -- Keir

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