aarch64: Define RME system registers

This patch introduces RME (Realm Management Extension) system registers.

gas/ChangeLog:

2021-03-01  Przemyslaw Wirkus  <przemyslaw.wirkus@arm.com>

	* testsuite/gas/aarch64/rme-invalid.d: New test.
	* testsuite/gas/aarch64/rme-invalid.l: New test.
	* testsuite/gas/aarch64/rme-invalid.s: New test.
	* testsuite/gas/aarch64/rme.d: New test.
	* testsuite/gas/aarch64/rme.s: New test.

opcodes/ChangeLog:

2021-03-01  Przemyslaw Wirkus  <przemyslaw.wirkus@arm.com>

	* aarch64-opc.c: Add RME system registers.

8 files changed, 49 insertions, 0 deletions

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 8df1225..72b8c69 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,11 @@
+2021-04-16  Przemyslaw Wirkus  <przemyslaw.wirkus@arm.com>
+
+	* testsuite/gas/aarch64/rme-invalid.d: New test.
+	* testsuite/gas/aarch64/rme-invalid.l: New test.
+	* testsuite/gas/aarch64/rme-invalid.s: New test.
+	* testsuite/gas/aarch64/rme.d: New test.
+	* testsuite/gas/aarch64/rme.s: New test.
+
 2021-04-16  Nelson Chu  <nelson.chu@sifive.com>
 
 	PR 27436
diff --git a/gas/testsuite/gas/aarch64/rme-invalid.d b/gas/testsuite/gas/aarch64/rme-invalid.d
new file mode 100644
index 0000000..091f40c
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/rme-invalid.d
@@ -0,0 +1,3 @@
+#name: Invalid RME System registers usage
+#source: rme-invalid.s
+#warning_output: rme-invalid.l
diff --git a/gas/testsuite/gas/aarch64/rme-invalid.l b/gas/testsuite/gas/aarch64/rme-invalid.l
new file mode 100644
index 0000000..7a9e3b2
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/rme-invalid.l
@@ -0,0 +1,2 @@
+.*: Assembler messages:
+.*: Warning: specified register cannot be written to at operand 1 -- `msr mfar_el3,x0'
diff --git a/gas/testsuite/gas/aarch64/rme-invalid.s b/gas/testsuite/gas/aarch64/rme-invalid.s
new file mode 100644
index 0000000..d19ac9ca
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/rme-invalid.s
@@ -0,0 +1,4 @@
+/* Realm Management Extension.  */
+
+/* Illegal write to RME system registers.  */
+msr mfar_el3, x0
diff --git a/gas/testsuite/gas/aarch64/rme.d b/gas/testsuite/gas/aarch64/rme.d
new file mode 100644
index 0000000..3667e87
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/rme.d
@@ -0,0 +1,14 @@
+#name: RME System registers
+#objdump: -dr
+
+.*:     file format .*
+
+Disassembly of section \.text:
+
+0+ <.*>:
+
+   0:	d53e60a0 	mrs	x0, mfar_el3
+   4:	d53e21c0 	mrs	x0, gpccr_el3
+   8:	d53e2180 	mrs	x0, gptbr_el3
+   c:	d51e21c0 	msr	gpccr_el3, x0
+  10:	d51e2180 	msr	gptbr_el3, x0
diff --git a/gas/testsuite/gas/aarch64/rme.s b/gas/testsuite/gas/aarch64/rme.s
new file mode 100644
index 0000000..89ee3a8
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/rme.s
@@ -0,0 +1,10 @@
+/* Realm Management Extension.  */
+
+/* Read from RME system registers.  */
+mrs x0, mfar_el3
+mrs x0, gpccr_el3
+mrs x0, gptbr_el3
+
+/* Write to RME system registers.  */
+msr gpccr_el3, x0
+msr gptbr_el3, x0
diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index dffc25c..452a96b 100644
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-16  Przemyslaw Wirkus  <przemyslaw.wirkus@arm.com>
+
+	* aarch64-opc.c: Add RME system registers.
+
 2021-04-16  Lifang Xia <lifang_xia@c-sky.com>
 
 	* riscv-opc.c (riscv_opcodes): New insn alias for addi. Compress
diff --git a/opcodes/aarch64-opc.c b/opcodes/aarch64-opc.c
index 79b37bf..8727def 100644
--- a/opcodes/aarch64-opc.c
+++ b/opcodes/aarch64-opc.c
@@ -4682,6 +4682,10 @@ const aarch64_sys_reg aarch64_sys_regs [] =
 
   SR_CORE ("accdata_el1",   CPENC (3,0,C13,C0,5), 0),
 
+  SR_CORE ("mfar_el3",      CPENC (3,6,C6,C0,5), F_REG_READ),
+  SR_CORE ("gpccr_el3",     CPENC (3,6,C2,C1,6), 0),
+  SR_CORE ("gptbr_el3",     CPENC (3,6,C2,C1,4), 0),
+
   { 0, CPENC (0,0,0,0,0), 0, 0 }
 };