tree a592788170762ccf28a952d453c2a8e5cc7d7dc2
parent 3a579ae0e02f4e82511171909ef269b1e1b85505
author Heyi Guo <guoheyi@linux.alibaba.com> 1610633778 +0800
committer Manish Pandey <manish.pandey2@arm.com> 1612350727 +0000

drivers/gicv3: fix potential GICD context override with ESPI enabled

RESTORE/SAVE_GICD_EREGS uses (int_id - (MIN_ESPI_ID - MIN_SPI_ID)) to
get the context array index for ESPI, which will override the space of
standard SPI starting from (MIN_SPI_ID + MIN_SPI_ID).

However, using TOTAL_SPI_INTR_NUM to replace the above MIN_SPI_ID
cannot totally fix the issue, for TOTAL_SPI_INTR_NUM is not well
aligned and the array index will be rounded down by the shifting
operation if being shifted more than 2 bits. It will cause buffer
override again when the existing maximum SPI reaches 1019.

So round up TOTAL_SPI_INTR_NUM with (1 << REG##R_SHIFT) for GICD
context arrays.

Signed-off-by: Heyi Guo <guoheyi@linux.alibaba.com>
Change-Id: I5be2837c42f381a62f8d46a4ecd778009b1fe059