2013-12-14 11:46+0200, Gleb Natapov:
On Fri, Dec 13, 2013 at 05:07:54PM +0100, Radim Krčmář wrote:
2013-12-12 21:36+0100, Paolo Bonzini:
From: Gleb Natapov g...@redhat.com
A guest can cause a BUG_ON() leading to a host kernel crash.
When the guest writes to the ICR to request an
On Mon, Dec 16, 2013 at 01:01:10PM +0100, Radim Krčmář wrote:
- Where does the 'only one supported cluster' come from?
only one supported cluster comes from 8 bit cpuid limitation of KVM's
x2apic
implementation. With 8 bit cpuid you can only address cluster 0 in logical
mode.
2013-12-16 14:16+0200, Gleb Natapov:
On Mon, Dec 16, 2013 at 01:01:10PM +0100, Radim Krčmář wrote:
- Where does the 'only one supported cluster' come from?
only one supported cluster comes from 8 bit cpuid limitation of KVM's
x2apic
implementation. With 8 bit cpuid you can
2013-12-16 13:55+0100, Radim Krčmář:
2013-12-16 14:16+0200, Gleb Natapov:
On Mon, Dec 16, 2013 at 01:01:10PM +0100, Radim Krčmář wrote:
- Where does the 'only one supported cluster' come from?
only one supported cluster comes from 8 bit cpuid limitation of KVM's
x2apic
On Mon, Dec 16, 2013 at 02:31:43PM +0100, Radim Krčmář wrote:
2013-12-16 13:55+0100, Radim Krčmář:
2013-12-16 14:16+0200, Gleb Natapov:
On Mon, Dec 16, 2013 at 01:01:10PM +0100, Radim Krčmář wrote:
- Where does the 'only one supported cluster' come from?
only one supported
On Fri, Dec 13, 2013 at 05:07:54PM +0100, Radim Krčmář wrote:
2013-12-12 21:36+0100, Paolo Bonzini:
From: Gleb Natapov g...@redhat.com
A guest can cause a BUG_ON() leading to a host kernel crash.
When the guest writes to the ICR to request an IPI, while in x2apic
mode the following
On Fri, Dec 13, 2013 at 06:25:20PM +0100, Paolo Bonzini wrote:
Il 13/12/2013 17:07, Radim Krčmář ha scritto:
This bug can only be hit when the destination cpu is 256, so the
request itself is buggy -- we don't support that many in kvm and it
would crash when initializing the vcpus
2013-12-12 21:36+0100, Paolo Bonzini:
From: Gleb Natapov g...@redhat.com
A guest can cause a BUG_ON() leading to a host kernel crash.
When the guest writes to the ICR to request an IPI, while in x2apic
mode the following things happen, the destination is read from
ICR2, which is a register
Il 13/12/2013 17:07, Radim Krčmář ha scritto:
This bug can only be hit when the destination cpu is 256, so the
request itself is buggy -- we don't support that many in kvm and it
would crash when initializing the vcpus if we did.
= It looks like we should just ignore the ipi,
2013-12-13 18:25+0100, Paolo Bonzini:
Il 13/12/2013 17:07, Radim Krčmář ha scritto:
This bug can only be hit when the destination cpu is 256, so the
request itself is buggy -- we don't support that many in kvm and it
would crash when initializing the vcpus if we did.
= It
From: Gleb Natapov g...@redhat.com
A guest can cause a BUG_ON() leading to a host kernel crash.
When the guest writes to the ICR to request an IPI, while in x2apic
mode the following things happen, the destination is read from
ICR2, which is a register that the guest can control.
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