Hi Leonid,
On 04/09/2025 21:01, Leonid Komarianskyi wrote:
The Dom0 and DomUs logic for the dom0less configuration in create_dom0()
and arch_create_domUs() should account for extended SPIs when supported
by the hardware and enabled with CONFIG_GICV3_ESPI. These changes ensure
proper calculation of the maximum number of SPIs and eSPIs available to
Dom0 and DomUs in dom0less setups.
When eSPIs are supported by the hardware and CONFIG_GICV3_ESPI is enabled, the
maximum number of eSPI interrupts is calculated using the ESPI_BASE_INTID
offset (4096) and is limited to 1024, with 32 IRQs subtracted. To ensure
compatibility with non-Dom0 domains, this adjustment is applied by the
toolstack during domain creation, while for Dom0 or DomUs in Dom0, it is
handled directly during VGIC initialization. If eSPIs are not supported, the
calculation defaults to using the standard SPI range, with a maximum value of
992 interrupt lines, as it works currently.
Signed-off-by: Leonid Komarianskyi <leonid_komarians...@epam.com>
Reviewed-by: Volodymyr Babchuk <volodymyr_babc...@epam.com>
Reviewed-by: Oleksandr Tyshchenko <oleksandr_tyshche...@epam.com>
Acked-by: Julien Grall <jgr...@amazon.com>
Cheers,
--
Julien Grall
