genode/repos/base-foc/patches/0014-Always-enable-user-mode-access-for-performance-monit.patch

From b74e427801f045578c401a140a8e66404bb3ff19 Mon Sep 17 00:00:00 2001
From: Christian Prochaska <christian.prochaska@genode-labs.com>
Date: Tue, 12 Feb 2019 19:54:06 +0100
Subject: [PATCH 14/15] Always enable user mode access for performance monitors

QEMU implements the cycle count register read by
'Genode::Trace::timestamp()', but does not report a supported debug model
version for Cortex-A9.
---
 kernel/fiasco/src/kern/arm/perf_cnt-arm.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/kernel/fiasco/src/kern/arm/perf_cnt-arm.cpp b/kernel/fiasco/src/kern/arm/perf_cnt-arm.cpp
index b7d6a935..bff54286 100644
--- a/kernel/fiasco/src/kern/arm/perf_cnt-arm.cpp
+++ b/kernel/fiasco/src/kern/arm/perf_cnt-arm.cpp
@@ -190,8 +190,13 @@ PUBLIC static FIASCO_INIT_CPU
 void
 Perf_cnt::init_cpu()
 {
-  if (!is_avail())
-    return;
+  /*
+   * QEMU implements the cycle count register read by
+   * 'Genode::Trace::timestamp()', but does not report a supported debug model
+   * version for Cortex-A9.
+   */
+  //if (!is_avail())
+    //return;
 
   _nr_counters = (pmcr() >> 11) & 0x1f;
 
-- 
2.11.0