Re: [PATCH] xen/arm: gicv3: initialize eSPI unconditionally

[Julien Grall <julien@xxxxxxx>]

Hi,

On 30/09/2025 10:00, Leonid Komarianskyi wrote:
> Since the firmware may initialize eSPIs before Xen, and without
> CONFIG_GICV3_ESPI enabled, Xen would not reinitialize them properly
> during boot. In such cases, once the GIC is re-enabled in Xen,
> interrupts may be received that cannot be handled.
>
> To ensure proper operation on hardware with eSPI feature, even when the eSPI
> config is disabled, gicv3_dist_espi_common_init() should be invoked
> regardless of whether CONFIG_GICV3_ESPI is enabled or not. This will not
> affect hardware without eSPI support, as the function checks if the
> hardware supports eSPIs by reading the GICD_TYPER.ESPI field (using
> GICD_TYPER_ESPIS_NUM macro), which indicates whether the extended SPI
> range is supported. If the hardware does not support eSPI, the function
> will not perform any actions.
>
> There are no functional changes for setups where CONFIG_GICV3_ESPI=y.
>
> Signed-off-by: Leonid Komarianskyi <leonid_komarianskyi@xxxxxxxx>
> Suggested-by: Julien Grall <jgrall@xxxxxxxxxx>
Usually tags are ordered chronologically. So this tag would need to 
appear first. I can fix that while committing.
Acked-by: Julien Grall <jgrall@xxxxxxxxxx>

Cheers,

--
Julien Grall