Re: [Xen-ia64-devel] [PATCH] emulate PAL_HALT_LIGHT on domU

[Atsushi SAKAI <sakaia@xxxxxxxxxxxxxx>]

Hi, All

This patch emulates Guest PAL_HALT_LIGHT on domU by using do_block and timer.
It also adds the function of the timer interrupt to domU at the vcpu woke up.

Signed-off-by: Atsushi SAKAI <sakaia@xxxxxxxxxxxxxx>


About the timer interrupt to domU

The function "xen_timer_interrupt" on Xen only sends 
the timer interrupt to current vcpu.
When the idle domain is running, DomU cannot receive timer interrupt.
If some domain cannot receive the timer interrupt during 10 secs,
a message "BUG: soft lockup detected appeared" comes from domU.
To avoid this, I add a timer interrupt check routine at the vcpu woke up.
 
Thanks for various comments on Xen-IA64-Devel and my colleagues.

Thanks,
Atsushi SAKAI

Attachment: domupal_halt_light_take2.patch
Description: Binary data

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