commit 071943b6ffb67047c78bc7e7c370fc41c16ef538
Author: William Cohen <wcohen@redhat.com>
Date:   Fri Oct 11 13:41:41 2013 -0400

    add preliminary aarch64 (arm64) support
    
    There has been some work to build fedora 19 on 64-bit arm armv8 machines
    (aarch64).  I took a look that the why the papi build was failing.  The
    attached is a set of minimal patches to get papi to build.  The patch is
    just a step toward getting aarch64 support for papi. Things are not all
    there for papi to work in that environment.  Still need libpfm to
    support aarch64 and papi_events.csv describing mappings to machine
    specific events.

diff --git a/src/configure b/src/configure
index 7cbd262..3c50e20 100755
--- a/src/configure
+++ b/src/configure
@@ -4262,7 +4262,7 @@ _ACEOF
 
 # First set pthread-mutexes based on arch
 case $arch in
-  arm*)
+  aarch64|arm*)
     pthread_mutexes=yes
     CFLAGS="$CFLAGS -DUSE_PTHREAD_MUTEXES"
     echo "forcing use of pthread mutexes... " >&6
diff --git a/src/configure.in b/src/configure.in
index 2a73ad6..acc8bfc 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -382,7 +382,7 @@ AC_DEFINE_UNQUOTED(CPU,$CPU,[cpu type])
 
 # First set pthread-mutexes based on arch                                       
 case $arch in
-  arm*)
+  aarch64|arm*)
     pthread_mutexes=yes
     CFLAGS="$CFLAGS -DUSE_PTHREAD_MUTEXES"
     echo "forcing use of pthread mutexes... " >&6
diff --git a/src/linux-context.h b/src/linux-context.h
index 2135695..524490b 100644
--- a/src/linux-context.h
+++ b/src/linux-context.h
@@ -31,6 +31,8 @@ typedef ucontext_t hwd_ucontext_t;
 #define OVERFLOW_ADDRESS(ctx) ((struct sigcontext *)ctx.ucontext)->si_regs.pc
 #elif defined(__arm__)
 #define OVERFLOW_ADDRESS(ctx) ctx.ucontext->uc_mcontext.arm_pc
+#elif defined(__aarch64__)
+#define OVERFLOW_ADDRESS(ctx) ctx.ucontext->uc_mcontext.pc
 #elif defined(__mips__)
 #define OVERFLOW_ADDRESS(ctx) ctx.ucontext->uc_mcontext.pc
 #else
diff --git a/src/linux-timer.c b/src/linux-timer.c
index 8e2d21f..9b918cd 100644
--- a/src/linux-timer.c
+++ b/src/linux-timer.c
@@ -215,7 +215,7 @@ get_cycles( void )
 /* POWER get_cycles()   */
 /************************/
 
-#elif (defined(__powerpc__) || defined(__arm__) || defined(__mips__))
+#elif (defined(__powerpc__) || defined(__arm__) || defined(__mips__) || defined(__aarch64__))
 /*
  * It's not possible to read the cycles from user space on ppc970.
  * There is a 64-bit time-base register (TBU|TBL), but its
commit 479e89a51ee18ba331c86a41be9ff17cd501e6d9
Author: William Cohen <wcohen@redhat.com>
Date:   Wed May 28 17:01:41 2014 -0400

    Add aarch64 Cortex A57 presets
    
    The events for the ARM Cortex A57 events look to be the same as the
    events for the ARM Cortex A15 events. Add an entry so the preset are
    available for the ARM Cortex A57.

diff --git a/src/papi_events.csv b/src/papi_events.csv
index 441844e..dbbc8d8 100644
--- a/src/papi_events.csv
+++ b/src/papi_events.csv
@@ -1473,6 +1473,7 @@ PRESET,PAPI_L1_DCM,NOT_DERIVED,DCACHE_REFILL
 PRESET,PAPI_L1_ICM,NOT_DERIVED,IFETCH_MISS
 #
 CPU,arm_ac15
+CPU,arm_ac57
 #
 PRESET,PAPI_TOT_INS,NOT_DERIVED,INST_RETIRED
 PRESET,PAPI_TOT_IIS,NOT_DERIVED,INST_SPEC_EXEC