ARM: add support for TEEHBR access

Thumb2 ARM kernels may access the TEEHBR via thumbee_notifier
in arch/arm/kernel/thumbee.c.  The Linux kernel code just seems
to be saving and restoring the register.  This patch adds support
for the TEEHBR cp14 register.  Note, this may be a special case
when restoring from an image that was run on a system that
supports ThumbEE.

1 files changed, 23 insertions, 0 deletions

diff --git a/src/arch/arm/miscregs.cc b/src/arch/arm/miscregs.cc
index a8abbf692..3a64b557a 100644
--- a/src/arch/arm/miscregs.cc
+++ b/src/arch/arm/miscregs.cc
@@ -63,9 +63,32 @@ decodeCP14Reg(unsigned crn, unsigned opc1, unsigned crm, unsigned opc2)
                 return NUM_MISCREGS;
             }
           default:
+            warn("CP14 unimplemented crn[%d], opc1[%d], crm[%d], opc2[%d]",
+                 crn, opc1, crm, opc2);
+            return NUM_MISCREGS;
+        }
+      case 1:
+        switch (opc1) {
+          case 6:
+            switch (crm) {
+              case 0:
+                switch (opc2) {
+                  case 0:
+                    return MISCREG_TEEHBR;
+                  default:
+                    warn("CP14 unimplemented crn[%d], opc1[%d], crm[%d], opc2[%d]",
+                         crn, opc1, crm, opc2);
+                    return NUM_MISCREGS;
+                }
+              default:
                 warn("CP14 unimplemented crn[%d], opc1[%d], crm[%d], opc2[%d]",
                      crn, opc1, crm, opc2);
                 return NUM_MISCREGS;
+            }
+          default:
+            warn("CP14 unimplemented crn[%d], opc1[%d], crm[%d], opc2[%d]",
+                 crn, opc1, crm, opc2);
+            return NUM_MISCREGS;
         }
       default:
         warn("CP14 unimplemented crn[%d], opc1[%d], crm[%d], opc2[%d]",