x86: support VMGEXIT

It has been publicly documented for quite some time, albeit not in the
"General-Purpose and System Instructions" volume:
https://www.amd.com/system/files/TechDocs/24593.pdf.

7 files changed, 21 insertions, 4 deletions

diff --git a/gas/ChangeLog b/gas/ChangeLog
index ed717af..7a2dfe1 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,13 @@
+2020-03-04  Jan Beulich  <jbeulich@suse.com>
+
+	* config/tc-i386.c (cpu_arch): Add .sev_es entry.
+	* doc/c-i386.texi: Mention sev_es.
+	* testsuite/gas/i386/arch-13.s: Add SEV-ES case.
+	* testsuite/gas/i386/arch-13.d: Extend -march=. Adjust
+	expectations.
+	* testsuite/gas/i386/arch-13-znver1.d,
+	testsuite/gas/i386/arch-13-znver2.d: Extend -march=.
+
 2020-03-03  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* config/tc-i386.c (match_template): Replace ignoresize and
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c
index af0a1cb..7117aeb 100644
--- a/gas/config/tc-i386.c
+++ b/gas/config/tc-i386.c
@@ -1188,6 +1188,8 @@ static const arch_entry cpu_arch[] =
     CPU_RDPRU_FLAGS, 0 },
   { STRING_COMMA_LEN (".mcommit"), PROCESSOR_UNKNOWN,
     CPU_MCOMMIT_FLAGS, 0 },
+  { STRING_COMMA_LEN (".sev_es"), PROCESSOR_UNKNOWN,
+    CPU_SEV_ES_FLAGS, 0 },
 };
 
 static const noarch_entry cpu_noarch[] =
diff --git a/gas/doc/c-i386.texi b/gas/doc/c-i386.texi
index 8c8e8d0..c536759 100644
--- a/gas/doc/c-i386.texi
+++ b/gas/doc/c-i386.texi
@@ -251,6 +251,7 @@ accept various extension mnemonics.  For example,
 @code{cldemote},
 @code{rdpru},
 @code{mcommit},
+@code{sev_es},
 @code{lwp},
 @code{fma4},
 @code{xop},
@@ -1454,7 +1455,7 @@ supported on the CPU specified.  The choices for @var{cpu_type} are:
 @item @samp{.syscall} @tab @samp{.rdtscp} @tab @samp{.svme}
 @item @samp{.lwp} @tab @samp{.fma4} @tab @samp{.xop} @tab @samp{.cx16}
 @item @samp{.padlock} @tab @samp{.clzero} @tab @samp{.mwaitx} @tab @samp{.rdpru}
-@item @samp{.mcommit}
+@item @samp{.mcommit} @tab @samp{.sev_es}
 @end multitable
 
 Apart from the warning, there are only two other effects on
diff --git a/gas/testsuite/gas/i386/arch-13-znver1.d b/gas/testsuite/gas/i386/arch-13-znver1.d
index df7ebf5..74acde5 100644
--- a/gas/testsuite/gas/i386/arch-13-znver1.d
+++ b/gas/testsuite/gas/i386/arch-13-znver1.d
@@ -1,5 +1,5 @@
 #source: arch-13.s
-#as: -march=znver1+rdpid+clwb+wbnoinvd+rdpru+mcommit
+#as: -march=znver1+rdpid+clwb+wbnoinvd+rdpru+mcommit+sev_es
 #objdump: -dw
 #name: i386 arch 13 (znver1)
 #dump: arch-13.d
diff --git a/gas/testsuite/gas/i386/arch-13-znver2.d b/gas/testsuite/gas/i386/arch-13-znver2.d
index c410305..6634447 100644
--- a/gas/testsuite/gas/i386/arch-13-znver2.d
+++ b/gas/testsuite/gas/i386/arch-13-znver2.d
@@ -1,5 +1,5 @@
 #source: arch-13.s
-#as: -march=znver2
+#as: -march=znver2+sev_es
 #objdump: -dw
 #name: i386 arch 13 (znver2)
 #dump: arch-13.d
diff --git a/gas/testsuite/gas/i386/arch-13.d b/gas/testsuite/gas/i386/arch-13.d
index 7e575bf..cbfc4a2 100644
--- a/gas/testsuite/gas/i386/arch-13.d
+++ b/gas/testsuite/gas/i386/arch-13.d
@@ -1,4 +1,4 @@
-#as: -march=i686+smap+adx+rdseed+clzero+xsavec+xsaves+clflushopt+mwaitx+rdpid+clwb+wbnoinvd+rdpru+mcommit
+#as: -march=i686+smap+adx+rdseed+clzero+xsavec+xsaves+clflushopt+mwaitx+rdpid+clwb+wbnoinvd+rdpru+mcommit+sev_es
 #objdump: -dw
 #name: i386 arch 13
 
@@ -28,5 +28,6 @@ Disassembly of section .text:
 [ 	]*[a-f0-9]+:[ 	]*f3 0f 01 fa[ 	]*mcommit[ 	]*
 [ 	]*[a-f0-9]+:[ 	]*f3 0f c7 f8[ 	]*rdpid  %eax
 [ 	]*[a-f0-9]+:[ 	]*0f 01 fd[ 	]*rdpru[ 	]*
+[ 	]*[a-f0-9]+:[ 	]*f3 0f 01 d9[ 	]*vmgexit[ 	]*
 [ 	]*[a-f0-9]+:[ 	]*f3 0f 09[ 	]*wbnoinvd[ 	]*
 #pass
diff --git a/gas/testsuite/gas/i386/arch-13.s b/gas/testsuite/gas/i386/arch-13.s
index 1c20cfe..5372d85 100644
--- a/gas/testsuite/gas/i386/arch-13.s
+++ b/gas/testsuite/gas/i386/arch-13.s
@@ -38,5 +38,8 @@
 # rdpru instruction
 	rdpru
 
+# vmgexit instruction
+	vmgexit
+
 # wbnoinvd instruction
 	wbnoinvd