From f19866e5cb04f8f007cb422132ea4611cdacc8e3 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andr=C3=A9=20Fabian=20Silva=20Delgado?= Date: Thu, 8 Oct 2015 08:28:26 -0300 Subject: Linux-libre 4.2.3-gnu --- arch/arm64/kernel/head.S | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'arch/arm64/kernel/head.S') diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S index c0ff3ce42..370541162 100644 --- a/arch/arm64/kernel/head.S +++ b/arch/arm64/kernel/head.S @@ -528,6 +528,11 @@ CPU_LE( movk x0, #0x30d0, lsl #16 ) // Clear EE and E0E on LE systems msr hstr_el2, xzr // Disable CP15 traps to EL2 #endif + /* EL2 debug */ + mrs x0, pmcr_el0 // Disable debug access traps + ubfx x0, x0, #11, #5 // to EL2 and allow access to + msr mdcr_el2, x0 // all PMU counters from EL1 + /* Stage-2 translation */ msr vttbr_el2, xzr -- cgit v1.2.3