X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Farch%2Farm64%2Fkernel%2Fhead.S;h=36aa31ff2c060084be0b4f2edfeb22d37edc4a3a;hb=refs%2Fchanges%2F53%2F2653%2F1;hp=19f915e8f6e0f001ce061b9eaf22cdedb9506c08;hpb=342fa5dfa053559f47caad657132522496dcf1b3;p=kvmfornfv.git

diff --git a/kernel/arch/arm64/kernel/head.S b/kernel/arch/arm64/kernel/head.S
index 19f915e8f..36aa31ff2 100644
--- a/kernel/arch/arm64/kernel/head.S
+++ b/kernel/arch/arm64/kernel/head.S
@@ -565,6 +565,11 @@ 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