Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 6fda41bf authored by Jean-Philippe Brucker's avatar Jean-Philippe Brucker Committed by Will Deacon
Browse files

arm64: Clear OSDLR_EL1 on CPU boot 



Some firmwares may reboot CPUs with OS Double Lock set. Make sure that
it is unlocked, in order to use debug exceptions.

Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarJean-Philippe Brucker <jean-philippe.brucker@arm.com>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent 475ba3fc

arch/arm64/kernel/debug-monitors.c

+1 −0
Original line number Diff line number Diff line
@@ -135,6 +135,7 @@ NOKPROBE_SYMBOL(disable_debug_monitors); 
 */

static int clear_os_lock(unsigned int cpu)

{

	write_sysreg(0, osdlr_el1);

	write_sysreg(0, oslar_el1);

	isb();

	return 0;