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Re: [Xen-devel] [PATCH 1/2] xen: arm: log warning for interrupt configuration mismatch

Hi Ian,

On 19/02/15 15:24, Ian Campbell wrote:
> The ICFGR register is not necessarily writeable, in particular it is
> IMPLEMENTATION DEFINED for a PPI if the configuration register is
> writeable. Log a warning if the hardware has ignored our write and
> update the actual type in the irq descriptor so subsequent code can do
> the right thing.
> This most likely implies a buggy firmware description (e.g.
> device-tree).
> The issue is observed for example on the APM Mustang board where the
> device tree (as shipped by Linux) describes all 3 timer interrupts as
> rising edge but the PPI is hard-coded to level triggered (as makes
> sense for an arch timer interrupt).
> Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> Cc: Pranavkumar Sawargaonkar <psawargaonkar@xxxxxxx>

Reviewed-by: Julien Grall <julien.grall@xxxxxxxxxx>


Julien Grall

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