Re: [Xen-devel] [PATCH v6] x86/vlapic: don't silently accept bad vectors

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 06.10.14 at 17:16, <andrew.cooper3@xxxxxxxxxx> wrote:
> On 06/10/14 16:11, Jan Beulich wrote:
>> Vectors 0-15 are reserved, and a physical LAPIC - upon sending or
>> receiving one - would generate an APIC error instead of doing the
>> requested action. Make our emulation behave similarly.
>>
>> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
> 
> What was windows actually tripping up on?

It sends one or more NMI IPIs when about to reboot (with, as
mandated, the vector field being zero).

Jan


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