Re: [PATCH 3/14] kexec: apic-virtwire-on-shutdown.i386.patch

[Maciej W. Rozycki]

On Thu, 25 Aug 2004, Eric W. Biederman wrote:

> I don't think the configuration you are worrying about where
> both the ioapic and the local apic can both be put into virtual
> wire mode is valid according to the mp specification.  Although that
> is probably a grey area in the specification.

 The spec doesn't preclude a configuration where the master i8259A is
wired both to an I/O APIC input and to local APIC inputs.  If this is the
case, it's a sole discretion of the system manufacturer to choose which
route for the "virtual wire" is used.

 I don't insist on doing exact LVT restoration as at this stage it
shouldn't really matter and the firmware should reinitialize the APIC
subsystem completely anyway.  I just wanted to be sure you are aware of
the issue.

  Maciej
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