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-rw-r--r--src/arch/arm/miscregs.cc7
1 files changed, 5 insertions, 2 deletions
diff --git a/src/arch/arm/miscregs.cc b/src/arch/arm/miscregs.cc
index 2ad256273..07d938f6a 100644
--- a/src/arch/arm/miscregs.cc
+++ b/src/arch/arm/miscregs.cc
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2010-2013 ARM Limited
+ * Copyright (c) 2010-2013, 2015 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
@@ -43,6 +43,7 @@
#include "arch/arm/miscregs.hh"
#include "base/misc.hh"
#include "cpu/thread_context.hh"
+#include "sim/full_system.hh"
namespace ArmISA
{
@@ -2138,7 +2139,9 @@ canWriteAArch64SysReg(MiscRegIndex reg, SCR scr, CPSR cpsr, ThreadContext *tc)
if (el == EL0 && !sctlr.uma)
return false;
}
- if (reg == MISCREG_DC_ZVA_Xt) {
+ if (FullSystem && reg == MISCREG_DC_ZVA_Xt) {
+ // In syscall-emulation mode, this test is skipped and DCZVA is always
+ // allowed at EL0
SCTLR sctlr = tc->readMiscReg(MISCREG_SCTLR_EL1);
if (el == EL0 && !sctlr.dze)
return false;