Re: [Xen-devel] [PATCH v3 1/4] x86/ioapic: only use dest32 with x2apic and interrupt remapping enabled

[Jan Beulich <jbeulich@xxxxxxxx>]

On 04.12.2019 17:20, Roger Pau Monne wrote:
> The IO-APIC code assumes that x2apic being enabled also implies
> interrupt remapping being enabled, and hence will use the 32bit
> destination field in the IO-APIC entry.
> 
> This is safe now, but there's no reason to not enable x2APIC even
> without interrupt remapping, and hence the IO-APIC code needs to use
> the 32 bit destination field only when both interrupt remapping and
> x2APIC are enabled.
> 
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>


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