Commit 2674dd0b authored Nov 16, 2011 by Javi Merino Committed by Russell King Nov 21, 2011

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>

parent fa0ce403

arch/arm/common/pl330.c

+7 −1

Original line number	Diff line number	Diff line
		@@ -1623,6 +1623,11 @@ static inline int _alloc_event(struct pl330_thread *thrd)
		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 @@ void pl330_request_channel(const struct pl330_info pi)

		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;

Admin message