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[Xen-devel] edge-triggered interrupts in non-ACPI SMP HVM

  • To: <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "He, Qing" <qing.he@xxxxxxxxx>
  • Date: Fri, 27 Oct 2006 10:20:06 +0800
  • Delivery-date: Thu, 26 Oct 2006 19:20:37 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: Acb5bmr5DsagoLgHQlW5UdZ56CmEKg==
  • Thread-topic: edge-triggered interrupts in non-ACPI SMP HVM

Hi folks,
When I tried to run HVM pv drivers on non-ACPI SMP guest, The guest
crashes complaining pv drivers using edged triggered interrupt.

When ACPI is disabled, Linux guest uses MP table to set up interrupt, so
I checked out mp table in hvmloader. Per my understanding, it's a
dynamically generated version of original BOCH rom's static mp table.

However, there is only one bus entry in that table, ISA. All the
interrupts is related to ISA bus and their trigger mode is set to
`follow bus', which Linux sets to edge triggered later.

I don't know whether lacking a PCI bus entry was OK, but now it turns
out to have problem with the pv driver. Is this going to be fixed?


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