[boot-wrapper] [PATCH 2/2] gic: Make sure all the supported SPIs are marked non-secure

[Suzuki K Poulose]

The maximum SPI INTID is 32(N+1) - 1, where N = GICD_TYPER:ITLinesNumber.
But currently we only mark the range, {32, 32*(N)-1} as Group1 non-secure.
If there happens to be an SPI allocated in the last 32 INTIDs, the EL1
will fail to use them as it would be marked Group0.

Cc: Jean-Philippe Brucker <jean-philippe.brucker at arm.com>
Cc: Mark Rutland <mark.rutland at arm.com>
Cc: Marc Zyngier <marc.zyngier at arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose at arm.com>
---
 gic.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/gic.c b/gic.c
index a84779e..83e340d 100644
--- a/gic.c
+++ b/gic.c
@@ -40,9 +40,10 @@ void gic_secure_init(void)
 
 	if (cpu == 0) {
 		uint32_t typer = raw_readl(gicd_base + GICD_TYPER);
+		uint32_t n_itlines = typer & GICD_TYPER_ITLineNumber;
 
-		/* Set SPIs to Group 1 */
-		for (i = 1; i < (typer & GICD_TYPER_ITLineNumber); i++)
+		/* Set SPIs {32, 32(n_itlines + 1) - 1} to Group 1 */
+		for (i = 1; i < n_itlines + 1; i++)
 			raw_writel(~0, gicd_base + GICD_IGROUPRn + i * 4);
 
 		raw_writel(GICD_CTLR_EnableGrp0 | GICD_CTLR_EnableGrp1,
-- 
2.7.5