From: Giacomo Travaglini <giacomo.travaglini@arm.com>
Date: Tue, 23 Oct 2018 15:23:27 +0000 (+0100)
Subject: arch-arm: CPTR_EL3.TCPAC traps EL2 accesses to CPACR_EL1
X-Git-Tag: v19.0.0.0~1458
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=47a8c479d9b12625d4d56a0c18ba72a0b640579e;p=gem5.git

arch-arm: CPTR_EL3.TCPAC traps EL2 accesses to CPACR_EL1

According to the arm arm, CPTR_EL3.TCPAC traps EL2 accesses to the
CPTR_EL2 or HCPTR, and EL2 and EL1 accesses to the CPACR_EL1 or CPACR,
are trapped to EL3, unless they are trapped by CPTR_EL2.TCPAC.

Change-Id: I637be35b29db39f044dda0c6cc4fe986c9620371
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/13775
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
---

diff --git a/src/arch/arm/utility.cc b/src/arch/arm/utility.cc
index e642250d8..0494c20d2 100644
--- a/src/arch/arm/utility.cc
+++ b/src/arch/arm/utility.cc
@@ -792,7 +792,7 @@ msrMrs64TrapToMon(const MiscRegIndex miscReg, CPTR cptr /* CPTR_EL3 */,
         break;
       // CPACR, CPTR
       case MISCREG_CPACR_EL1:
-        if (el == EL1) {
+        if (el == EL1 || el == EL2) {
            trapToMon = cptr.tcpac;
         }
         break;