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Re: [PATCH v2 3/3] xen/x86: ioapic: Simplify ioapic_init()

On 04.04.2020 12:26, Julien Grall wrote:
> From: Julien Grall <jgrall@xxxxxxxxxx>
> Since commit 9facd54a45 "x86/ioapic: Add register level checks to detect
> bogus io-apic entries", Xen is able to cope with IO APICs not mapped in
> the fixmap.
> Therefore the whole logic to allocate a fake page for some IO APICs is
> unnecessary.
> With the logic removed, the code can be simplified a lot as we don't
> need to go through all the IO APIC if SMP has not been detected or a
> bogus zero IO-APIC address has been detected.
> To avoid another level of tabulation, the simplification is now moved in
> its own function.
> Signed-off-by: Julien Grall <jgrall@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>



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