[AArch64] Support RAS extension for ARMv8 onwards.

The RAS extension was introduced as part of the ARMv8.2 architecture
where it is a required feature. It is also available as an optional
feature for ARMv8 and ARMv8.1. In binutils, the RAS extension is
currently enabled by default for -march=armv8.2-a but is not available
for -march=armv8 or -march=armv8.1-a.

This patch adds the feature extension '+ras' to enable the RAS extension
for ARMv8 and ARMv8.1, it is disabled by default.

gas/
2016-04-20  Matthew Wahab  <matthew.wahab@arm.com>

	* config/tc-aarch64.c (aarch64_features): Add "ras".
	* doc/c-aarch64.texi (AArch64 Extensions): Add "ras".
	* testsuite/gas/aarch64/armv8-ras-1.d: New.
	* testsuite/gas/aarch64/armv8-ras-1.s: New.
	* testsuite/gas/aarch64/illegal-ras-1.d: New.
	* testsuite/gas/aarch64/illegal-ras-1.s: New.

Change-Id: I824fb9bc8cf846bcc03aa17a726efb1350d78b9d

diff --git a/gas/ChangeLog b/gas/ChangeLog
index e6deed4..8c5e2af 100644 (file)
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,12 @@
+2016-04-20  Matthew Wahab  <matthew.wahab@arm.com>
+
+       * config/tc-aarch64.c (aarch64_features): Add "ras".
+       * doc/c-aarch64.texi (AArch64 Extensions): Add "ras".
+       * testsuite/gas/aarch64/armv8-ras-1.d: New.
+       * testsuite/gas/aarch64/armv8-ras-1.s: New.
+       * testsuite/gas/aarch64/illegal-ras-1.d: New.
+       * testsuite/gas/aarch64/illegal-ras-1.s: New.
+
 2016-04-19  Andrew Burgess  <andrew.burgess@embecosm.com>
 
        * testsuite/gas/arc/nps400-6.d: New file.

diff --git a/gas/config/tc-aarch64.c b/gas/config/tc-aarch64.c
index 8fb93ee..9f8764e 100644 (file)
--- a/gas/config/tc-aarch64.c
+++ b/gas/config/tc-aarch64.c
@@ -7809,6 +7809,7 @@ static const struct aarch64_option_cpu_value_table aarch64_features[] = {
   {"simd",             AARCH64_FEATURE (AARCH64_FEATURE_SIMD, 0)},
   {"pan",              AARCH64_FEATURE (AARCH64_FEATURE_PAN, 0)},
   {"lor",              AARCH64_FEATURE (AARCH64_FEATURE_LOR, 0)},
+  {"ras",              AARCH64_FEATURE (AARCH64_FEATURE_RAS, 0)},
   {"rdma",             AARCH64_FEATURE (AARCH64_FEATURE_SIMD
                                         | AARCH64_FEATURE_RDMA, 0)},
   {"fp16",             AARCH64_FEATURE (AARCH64_FEATURE_F16

diff --git a/gas/doc/c-aarch64.texi b/gas/doc/c-aarch64.texi
index 669987b..a193908 100644 (file)
--- a/gas/doc/c-aarch64.texi
+++ b/gas/doc/c-aarch64.texi
@@ -145,6 +145,9 @@ automatically cause those extensions to be disabled.
  @tab Enable Privileged Access Never support.
 @item @code{profile} @tab ARMv8.2-A @tab No
  @tab Enable statistical profiling extensions.
+@item @code{ras} @tab ARMv8-A @tab ARMv8.2-A or later
+ @tab Enable the Reliability, Availability and Serviceability
+ extension.
 @item @code{rdma} @tab ARMv8-A @tab ARMv8.1-A or later
  @tab Enable ARMv8.1 Advanced SIMD extensions.  This implies @code{simd}.
 @item @code{simd} @tab ARMv8-A @tab ARMv8-A or later

diff --git a/gas/testsuite/gas/aarch64/armv8-ras-1.d b/gas/testsuite/gas/aarch64/armv8-ras-1.d
new file mode 100644 (file)
index 0000000..69db3c2
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/armv8-ras-1.d
@@ -0,0 +1,68 @@
+#as: -march=armv8-a+ras
+#objdump: -dr
+
+.*:     file format .*
+
+Disassembly of section \.text:
+
+0000000000000000 <.*>:
+[^:]+: d503221f        esb
+[^:]+: d503221f        esb
+[^:]+: d5385305        mrs     x5, erridr_el1
+[^:]+: d5185327        msr     errselr_el1, x7
+[^:]+: d5385327        mrs     x7, errselr_el1
+[^:]+: d5385405        mrs     x5, erxfr_el1
+[^:]+: d5185425        msr     erxctlr_el1, x5
+[^:]+: d5385425        mrs     x5, erxctlr_el1
+[^:]+: d5185445        msr     erxstatus_el1, x5
+[^:]+: d5385445        mrs     x5, erxstatus_el1
+[^:]+: d5185465        msr     erxaddr_el1, x5
+[^:]+: d5385465        mrs     x5, erxaddr_el1
+[^:]+: d5185505        msr     erxmisc0_el1, x5
+[^:]+: d5385505        mrs     x5, erxmisc0_el1
+[^:]+: d5185525        msr     erxmisc1_el1, x5
+[^:]+: d5385525        mrs     x5, erxmisc1_el1
+[^:]+: d53c5265        mrs     x5, vsesr_el2
+[^:]+: d518c125        msr     disr_el1, x5
+[^:]+: d538c125        mrs     x5, disr_el1
+[^:]+: d53cc125        mrs     x5, vdisr_el2
+[^:]+: d503221f        esb
+[^:]+: d503221f        esb
+[^:]+: d5385305        mrs     x5, erridr_el1
+[^:]+: d5185327        msr     errselr_el1, x7
+[^:]+: d5385327        mrs     x7, errselr_el1
+[^:]+: d5385405        mrs     x5, erxfr_el1
+[^:]+: d5185425        msr     erxctlr_el1, x5
+[^:]+: d5385425        mrs     x5, erxctlr_el1
+[^:]+: d5185445        msr     erxstatus_el1, x5
+[^:]+: d5385445        mrs     x5, erxstatus_el1
+[^:]+: d5185465        msr     erxaddr_el1, x5
+[^:]+: d5385465        mrs     x5, erxaddr_el1
+[^:]+: d5185505        msr     erxmisc0_el1, x5
+[^:]+: d5385505        mrs     x5, erxmisc0_el1
+[^:]+: d5185525        msr     erxmisc1_el1, x5
+[^:]+: d5385525        mrs     x5, erxmisc1_el1
+[^:]+: d53c5265        mrs     x5, vsesr_el2
+[^:]+: d518c125        msr     disr_el1, x5
+[^:]+: d538c125        mrs     x5, disr_el1
+[^:]+: d53cc125        mrs     x5, vdisr_el2
+[^:]+: d503221f        esb
+[^:]+: d503221f        esb
+[^:]+: d5385305        mrs     x5, erridr_el1
+[^:]+: d5185327        msr     errselr_el1, x7
+[^:]+: d5385327        mrs     x7, errselr_el1
+[^:]+: d5385405        mrs     x5, erxfr_el1
+[^:]+: d5185425        msr     erxctlr_el1, x5
+[^:]+: d5385425        mrs     x5, erxctlr_el1
+[^:]+: d5185445        msr     erxstatus_el1, x5
+[^:]+: d5385445        mrs     x5, erxstatus_el1
+[^:]+: d5185465        msr     erxaddr_el1, x5
+[^:]+: d5385465        mrs     x5, erxaddr_el1
+[^:]+: d5185505        msr     erxmisc0_el1, x5
+[^:]+: d5385505        mrs     x5, erxmisc0_el1
+[^:]+: d5185525        msr     erxmisc1_el1, x5
+[^:]+: d5385525        mrs     x5, erxmisc1_el1
+[^:]+: d53c5265        mrs     x5, vsesr_el2
+[^:]+: d518c125        msr     disr_el1, x5
+[^:]+: d538c125        mrs     x5, disr_el1
+[^:]+: d53cc125        mrs     x5, vdisr_el2

diff --git a/gas/testsuite/gas/aarch64/armv8-ras-1.s b/gas/testsuite/gas/aarch64/armv8-ras-1.s
new file mode 100644 (file)
index 0000000..2aedb58
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/armv8-ras-1.s
@@ -0,0 +1,73 @@
+       /* ARMv8 RAS Extension.  */
+       .text
+
+       .macro rw_sys_reg sys_reg xreg r w
+       .ifc \w, 1
+       msr \sys_reg, \xreg
+       .endif
+       .ifc \r, 1
+       mrs \xreg, \sys_reg
+       .endif
+       .endm
+
+       /* ARMv8-A.  */
+       .arch armv8-a+ras
+       esb
+       hint #0x10
+
+       rw_sys_reg sys_reg=erridr_el1 xreg=x5 r=1 w=0
+       rw_sys_reg sys_reg=errselr_el1 xreg=x7 r=1 w=1
+
+       rw_sys_reg sys_reg=erxfr_el1 xreg=x5 r=1 w=0
+       rw_sys_reg sys_reg=erxctlr_el1 xreg=x5 r=1 w=1
+       rw_sys_reg sys_reg=erxstatus_el1 xreg=x5 r=1 w=1
+       rw_sys_reg sys_reg=erxaddr_el1 xreg=x5 r=1 w=1
+
+       rw_sys_reg sys_reg=erxmisc0_el1 xreg=x5 r=1 w=1
+       rw_sys_reg sys_reg=erxmisc1_el1 xreg=x5 r=1 w=1
+
+       rw_sys_reg sys_reg=vsesr_el2 xreg=x5 r=1 w=0
+       rw_sys_reg sys_reg=disr_el1 xreg=x5 r=1 w=1
+       rw_sys_reg sys_reg=vdisr_el2 xreg=x5 r=1 w=0
+
+       /* ARMv8.1-A.  */
+
+       .arch armv8.1-a+ras
+       esb
+       hint #0x10
+
+       rw_sys_reg sys_reg=erridr_el1 xreg=x5 r=1 w=0
+       rw_sys_reg sys_reg=errselr_el1 xreg=x7 r=1 w=1
+
+       rw_sys_reg sys_reg=erxfr_el1 xreg=x5 r=1 w=0
+       rw_sys_reg sys_reg=erxctlr_el1 xreg=x5 r=1 w=1
+       rw_sys_reg sys_reg=erxstatus_el1 xreg=x5 r=1 w=1
+       rw_sys_reg sys_reg=erxaddr_el1 xreg=x5 r=1 w=1
+
+       rw_sys_reg sys_reg=erxmisc0_el1 xreg=x5 r=1 w=1
+       rw_sys_reg sys_reg=erxmisc1_el1 xreg=x5 r=1 w=1
+
+       rw_sys_reg sys_reg=vsesr_el2 xreg=x5 r=1 w=0
+       rw_sys_reg sys_reg=disr_el1 xreg=x5 r=1 w=1
+       rw_sys_reg sys_reg=vdisr_el2 xreg=x5 r=1 w=0
+
+       /* ARMv8.2-A.  */
+
+       .arch armv8.2-a+ras
+       esb
+       hint #0x10
+
+       rw_sys_reg sys_reg=erridr_el1 xreg=x5 r=1 w=0
+       rw_sys_reg sys_reg=errselr_el1 xreg=x7 r=1 w=1
+
+       rw_sys_reg sys_reg=erxfr_el1 xreg=x5 r=1 w=0
+       rw_sys_reg sys_reg=erxctlr_el1 xreg=x5 r=1 w=1
+       rw_sys_reg sys_reg=erxstatus_el1 xreg=x5 r=1 w=1
+       rw_sys_reg sys_reg=erxaddr_el1 xreg=x5 r=1 w=1
+
+       rw_sys_reg sys_reg=erxmisc0_el1 xreg=x5 r=1 w=1
+       rw_sys_reg sys_reg=erxmisc1_el1 xreg=x5 r=1 w=1
+
+       rw_sys_reg sys_reg=vsesr_el2 xreg=x5 r=1 w=0
+       rw_sys_reg sys_reg=disr_el1 xreg=x5 r=1 w=1
+       rw_sys_reg sys_reg=vdisr_el2 xreg=x5 r=1 w=0

diff --git a/gas/testsuite/gas/aarch64/illegal-ras-1.d b/gas/testsuite/gas/aarch64/illegal-ras-1.d
new file mode 100644 (file)
index 0000000..b7b72ea
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/illegal-ras-1.d
@@ -0,0 +1,4 @@
+#name: Illegal RAS instruction use.
+#source: illegal-ras-1.s
+#as: -march=armv8-a -mno-verbose-error
+#error-output: illegal-ras-1.l

diff --git a/gas/testsuite/gas/aarch64/illegal-ras-1.l b/gas/testsuite/gas/aarch64/illegal-ras-1.l
new file mode 100644 (file)
index 0000000..e8803e5
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/illegal-ras-1.l
@@ -0,0 +1,39 @@
+[^:]+: Assembler messages:
+^[^:]+:[0-9]+: Error: selected processor does not support `esb'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erridr_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'errselr_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'errselr_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxfr_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxctlr_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxctlr_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxstatus_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxstatus_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxaddr_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxaddr_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxmisc0_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxmisc0_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxmisc1_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxmisc1_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'vsesr_el2'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'disr_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'disr_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'vdisr_el2'
+^[^:]+:[0-9]+: Error: selected processor does not support `esb'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erridr_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'errselr_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'errselr_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxfr_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxctlr_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxctlr_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxstatus_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxstatus_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxaddr_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxaddr_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxmisc0_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxmisc0_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxmisc1_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'erxmisc1_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'vsesr_el2'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'disr_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'disr_el1'
+^[^:]+:[0-9]+: Error: selected processor does not support system register name 'vdisr_el2'

diff --git a/gas/testsuite/gas/aarch64/illegal-ras-1.s b/gas/testsuite/gas/aarch64/illegal-ras-1.s
new file mode 100644 (file)
index 0000000..5d61fb7
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/illegal-ras-1.s
@@ -0,0 +1,52 @@
+       /* Incorrect use of the RAS extension instructions. */
+       .text
+
+       .macro rw_sys_reg sys_reg xreg r w
+       .ifc \w, 1
+       msr \sys_reg, \xreg
+       .endif
+       .ifc \r, 1
+       mrs \xreg, \sys_reg
+       .endif
+       .endm
+
+       /* ARMv8-A.  */
+       .arch armv8-a
+       esb
+       hint #0x10
+
+       rw_sys_reg sys_reg=erridr_el1 xreg=x5 r=1 w=0
+       rw_sys_reg sys_reg=errselr_el1 xreg=x7 r=1 w=1
+
+       rw_sys_reg sys_reg=erxfr_el1 xreg=x5 r=1 w=0
+       rw_sys_reg sys_reg=erxctlr_el1 xreg=x5 r=1 w=1
+       rw_sys_reg sys_reg=erxstatus_el1 xreg=x5 r=1 w=1
+       rw_sys_reg sys_reg=erxaddr_el1 xreg=x5 r=1 w=1
+
+       rw_sys_reg sys_reg=erxmisc0_el1 xreg=x5 r=1 w=1
+       rw_sys_reg sys_reg=erxmisc1_el1 xreg=x5 r=1 w=1
+
+       rw_sys_reg sys_reg=vsesr_el2 xreg=x5 r=1 w=0
+       rw_sys_reg sys_reg=disr_el1 xreg=x5 r=1 w=1
+       rw_sys_reg sys_reg=vdisr_el2 xreg=x5 r=1 w=0
+
+       /* ARMv8.1-A.  */
+
+       .arch armv8.1-a
+       esb
+       hint #0x10
+
+       rw_sys_reg sys_reg=erridr_el1 xreg=x5 r=1 w=0
+       rw_sys_reg sys_reg=errselr_el1 xreg=x7 r=1 w=1
+
+       rw_sys_reg sys_reg=erxfr_el1 xreg=x5 r=1 w=0
+       rw_sys_reg sys_reg=erxctlr_el1 xreg=x5 r=1 w=1
+       rw_sys_reg sys_reg=erxstatus_el1 xreg=x5 r=1 w=1
+       rw_sys_reg sys_reg=erxaddr_el1 xreg=x5 r=1 w=1
+
+       rw_sys_reg sys_reg=erxmisc0_el1 xreg=x5 r=1 w=1
+       rw_sys_reg sys_reg=erxmisc1_el1 xreg=x5 r=1 w=1
+
+       rw_sys_reg sys_reg=vsesr_el2 xreg=x5 r=1 w=0
+       rw_sys_reg sys_reg=disr_el1 xreg=x5 r=1 w=1
+       rw_sys_reg sys_reg=vdisr_el2 xreg=x5 r=1 w=0