ARM: 7163/2: PL330: Only register usable channels
When the manager is running non-secure, the only channels that can
issue interrupts are the ones that have a 1 in their corresponding bit
in Configuration Register 3. The other ones will generate an abort
when trying to signal the end of the transaction so they are useless
in non-secure mode.
Reference: <1320244259-10496-2-git-send-email-javi.merino@arm.com>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/common/pl330.c b/arch/arm/common/pl330.c
index 7129cfb..f748a38 100644
--- a/arch/arm/common/pl330.c
+++ b/arch/arm/common/pl330.c
@@ -1623,6 +1623,11 @@
return -1;
}
+static bool _chan_ns(const struct pl330_info *pi, int i)
+{
+ return pi->pcfg.irq_ns & (1 << i);
+}
+
/* Upon success, returns IdentityToken for the
* allocated channel, NULL otherwise.
*/
@@ -1647,7 +1652,8 @@
for (i = 0; i < chans; i++) {
thrd = &pl330->channels[i];
- if (thrd->free) {
+ if ((thrd->free) && (!_manager_ns(thrd) ||
+ _chan_ns(pi, i))) {
thrd->ev = _alloc_event(thrd);
if (thrd->ev >= 0) {
thrd->free = false;