fix(sdei): ensure that interrupt ID is valid

As per SDEI spec (section 5.1.14.1), SDEI_INTERRUPT_BIND interface
expects a valid PPI or SPI. SGI's are not allowed to be bounded.
Current check in the code only checks for an SGI and returns invalid
ID. This check is insufficient as it will not catch architecturally
invalid interrupt IDs.

Modify the check to ensure that interrupt is either PPI or SPI.

Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
Change-Id: I52eb0a6d7f88a12f6816cff9b68fb3a7ca12cbb7
(cherry picked from commit a7eff3477dcf3624c74f5217419b1a27b7ebd2aa)

services/std_svc/sdei/sdei_main.c

@@ -708,8 +708,8 @@ static int sdei_interrupt_bind(unsigned int intr_num)
 	sdei_ev_map_t *map;
 	bool retry = true, shared_mapping;
 
-	/* SGIs are not allowed to be bound */
-	if (plat_ic_is_sgi(intr_num) != 0)
+	/* Interrupt must be either PPI or SPI */
+	if (!(plat_ic_is_ppi(intr_num) || plat_ic_is_spi(intr_num)))
 		return SDEI_EINVAL;
 
 	shared_mapping = (plat_ic_is_spi(intr_num) != 0);