x86/insn: Add AVX-512 support to the instruction decoder

Add support for Intel's AVX-512 instructions to the instruction decoder.

AVX-512 instructions are documented in Intel Architecture Instruction
Set Extensions Programming Reference (February 2016).

AVX-512 instructions are identified by a EVEX prefix which, for the
purpose of instruction decoding, can be treated as though it were a
4-byte VEX prefix.

Existing instructions which can now accept an EVEX prefix need not be
further annotated in the op code map (x86-opcode-map.txt). In the case
of new instructions, the op code map is updated accordingly.

Also add associated Mask Instructions that are used to manipulate mask
registers used in AVX-512 instructions.

The 'perf tools' instruction decoder is updated in a subsequent patch.
And a representative set of instructions is added to the perf tools new
instructions test in a subsequent patch.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: X86 ML <x86@kernel.org>
Link: http://lkml.kernel.org/r/1469003437-32706-3-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 8 insertions, 3 deletions

diff --git a/arch/x86/tools/gen-insn-attr-x86.awk b/arch/x86/tools/gen-insn-attr-x86.awk
index 093a892026f9..a3d2c62fd805 100644
--- a/arch/x86/tools/gen-insn-attr-x86.awk
+++ b/arch/x86/tools/gen-insn-attr-x86.awk
@@ -72,12 +72,14 @@ BEGIN {
         lprefix_expr = "\\((66|F2|F3)\\)"
         max_lprefix = 4
 
-        # All opcodes starting with lower-case 'v' or with (v1) superscript
+        # All opcodes starting with lower-case 'v', 'k' or with (v1) superscript
         # accepts VEX prefix
-        vexok_opcode_expr = "^v.*"
+        vexok_opcode_expr = "^[vk].*"
         vexok_expr = "\\(v1\\)"
         # All opcodes with (v) superscript supports *only* VEX prefix
         vexonly_expr = "\\(v\\)"
+        # All opcodes with (ev) superscript supports *only* EVEX prefix
+        evexonly_expr = "\\(ev\\)"
 
         prefix_expr = "\\(Prefix\\)"
         prefix_num["Operand-Size"] = "INAT_PFX_OPNDSZ"
@@ -95,6 +97,7 @@ BEGIN {
         prefix_num["Address-Size"] = "INAT_PFX_ADDRSZ"
         prefix_num["VEX+1byte"] = "INAT_PFX_VEX2"
         prefix_num["VEX+2byte"] = "INAT_PFX_VEX3"
+        prefix_num["EVEX"] = "INAT_PFX_EVEX"
 
         clear_vars()
 }
@@ -319,7 +322,9 @@ function convert_operands(count,opnd,       i,j,imm,mod)
                         flags = add_flags(flags, "INAT_MODRM")
 
                 # check VEX codes
-                if (match(ext, vexonly_expr))
+                if (match(ext, evexonly_expr))
+                        flags = add_flags(flags, "INAT_VEXOK | INAT_EVEXONLY")
+                else if (match(ext, vexonly_expr))
                         flags = add_flags(flags, "INAT_VEXOK | INAT_VEXONLY")
                 else if (match(ext, vexok_expr) || match(opcode, vexok_opcode_expr))
                         flags = add_flags(flags, "INAT_VEXOK")