Paolo Bonzini wrote on 2014-08-07:
> Il 07/08/2014 03:31, Zhang, Yang Z ha scritto:
>> Let me give an example to see whether my concern is a real problem:
>> Guest allocates a vector and set it in IOAPIC entry to deliver
>> interrupt. Later it masks the IOAPIC entry(means stop the
>> corresponding
Il 07/08/2014 03:31, Zhang, Yang Z ha scritto:
> Let me give an example to see whether my concern is a real problem:
> Guest allocates a vector and set it in IOAPIC entry to deliver
> interrupt. Later it masks the IOAPIC entry(means stop the
> corresponding device) and assign this vector to a MSI
Paolo Bonzini wrote on 2014-08-06:
> Il 06/08/2014 16:03, Zhang, Yang Z ha scritto:
>> Paolo Bonzini wrote on 2014-07-31:
>>> Probably, the guest is masking the interrupt in the redirection
>>> table in the interrupt routine, i.e. while the interrupt is set in a
>>> LAPIC's ISR.
>>> The simplest f
Il 06/08/2014 16:03, Zhang, Yang Z ha scritto:
> Paolo Bonzini wrote on 2014-07-31:
>> Probably, the guest is masking the interrupt in the redirection table in
>> the interrupt routine, i.e. while the interrupt is set in a LAPIC's ISR.
>> The simplest fix is to ignore the masking state, we would ra
Paolo Bonzini wrote on 2014-07-31:
> Currently, the EOI exit bitmap (used for APICv) does not include
> interrupts that are masked. However, this can cause a bug that manifests
> as an interrupt storm inside the guest. Alex Williamson reported the
> bug and is the one who really debugged this; I
On Wed, 2014-07-30 at 18:12 +0200, Paolo Bonzini wrote:
> Currently, the EOI exit bitmap (used for APICv) does not include
> interrupts that are masked. However, this can cause a bug that manifests
> as an interrupt storm inside the guest. Alex Williamson reported the
> bug and is the one who rea
Currently, the EOI exit bitmap (used for APICv) does not include
interrupts that are masked. However, this can cause a bug that manifests
as an interrupt storm inside the guest. Alex Williamson reported the
bug and is the one who really debugged this; I only wrote the patch. :)
The scenario invo
