On 01/20/2010 04:00 AM, Avi Kivity wrote:
On 01/20/2010 12:02 PM, Gleb Natapov wrote:I don't think the TPR would be involved unless you involve the APIC
I can inject the event as HW interrupt on vector greater then 32 but notFurther, we start to interact with the TPR; Linux doesn't use the TPR or
go through APIC so EOI will not be required. This sounds
and I am not sure kernel has entry point code for this kind of event, it
has one for exception and one for interrupts that goes through __do_IRQ()
which assumes that interrupts should be ACKed.
cr8 but if it does one day we don't want it interfering with apf.
(which you absolutely don't want to do.) What I'm trying to figure out
is if you could inject this vector as "external interrupt" and still
have it deliver if IF=0, or if it would cause any other funnies.
As that point, you do not want to go through the do_IRQ path but rather
through your own exception vector entry point (it would be an entry
point which doesn't get an error code, like #UD.)