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authorAdrian Hunter <adrian.hunter@intel.com>2016-07-20 10:30:35 +0200
committerArnaldo Carvalho de Melo <acme@redhat.com>2016-07-21 14:37:11 +0200
commit25af37f4e1e0a747824e3713b80d6b97dad28b7c (patch)
treebd62c50bb1cb1f58e7c71e3425d41fd518038c6a /arch/x86/include/asm
parentx86/insn: perf tools: Fix vcvtph2ps instruction decoding (diff)
downloadlinux-25af37f4e1e0a747824e3713b80d6b97dad28b7c.tar.xz
linux-25af37f4e1e0a747824e3713b80d6b97dad28b7c.zip
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>
Diffstat (limited to 'arch/x86/include/asm')
-rw-r--r--arch/x86/include/asm/inat.h17
-rw-r--r--arch/x86/include/asm/insn.h12
2 files changed, 26 insertions, 3 deletions
diff --git a/arch/x86/include/asm/inat.h b/arch/x86/include/asm/inat.h
index 74a2e312e8a2..02aff0867211 100644
--- a/arch/x86/include/asm/inat.h
+++ b/arch/x86/include/asm/inat.h
@@ -48,6 +48,7 @@
/* AVX VEX prefixes */
#define INAT_PFX_VEX2 13 /* 2-bytes VEX prefix */
#define INAT_PFX_VEX3 14 /* 3-bytes VEX prefix */
+#define INAT_PFX_EVEX 15 /* EVEX prefix */
#define INAT_LSTPFX_MAX 3
#define INAT_LGCPFX_MAX 11
@@ -89,6 +90,7 @@
#define INAT_VARIANT (1 << (INAT_FLAG_OFFS + 4))
#define INAT_VEXOK (1 << (INAT_FLAG_OFFS + 5))
#define INAT_VEXONLY (1 << (INAT_FLAG_OFFS + 6))
+#define INAT_EVEXONLY (1 << (INAT_FLAG_OFFS + 7))
/* Attribute making macros for attribute tables */
#define INAT_MAKE_PREFIX(pfx) (pfx << INAT_PFX_OFFS)
#define INAT_MAKE_ESCAPE(esc) (esc << INAT_ESC_OFFS)
@@ -141,7 +143,13 @@ static inline int inat_last_prefix_id(insn_attr_t attr)
static inline int inat_is_vex_prefix(insn_attr_t attr)
{
attr &= INAT_PFX_MASK;
- return attr == INAT_PFX_VEX2 || attr == INAT_PFX_VEX3;
+ return attr == INAT_PFX_VEX2 || attr == INAT_PFX_VEX3 ||
+ attr == INAT_PFX_EVEX;
+}
+
+static inline int inat_is_evex_prefix(insn_attr_t attr)
+{
+ return (attr & INAT_PFX_MASK) == INAT_PFX_EVEX;
}
static inline int inat_is_vex3_prefix(insn_attr_t attr)
@@ -216,6 +224,11 @@ static inline int inat_accept_vex(insn_attr_t attr)
static inline int inat_must_vex(insn_attr_t attr)
{
- return attr & INAT_VEXONLY;
+ return attr & (INAT_VEXONLY | INAT_EVEXONLY);
+}
+
+static inline int inat_must_evex(insn_attr_t attr)
+{
+ return attr & INAT_EVEXONLY;
}
#endif
diff --git a/arch/x86/include/asm/insn.h b/arch/x86/include/asm/insn.h
index e7814b74caf8..b3e32b010ab1 100644
--- a/arch/x86/include/asm/insn.h
+++ b/arch/x86/include/asm/insn.h
@@ -91,6 +91,7 @@ struct insn {
#define X86_VEX_B(vex) ((vex) & 0x20) /* VEX3 Byte1 */
#define X86_VEX_L(vex) ((vex) & 0x04) /* VEX3 Byte2, VEX2 Byte1 */
/* VEX bit fields */
+#define X86_EVEX_M(vex) ((vex) & 0x03) /* EVEX Byte1 */
#define X86_VEX3_M(vex) ((vex) & 0x1f) /* VEX3 Byte1 */
#define X86_VEX2_M 1 /* VEX2.M always 1 */
#define X86_VEX_V(vex) (((vex) & 0x78) >> 3) /* VEX3 Byte2, VEX2 Byte1 */
@@ -133,6 +134,13 @@ static inline int insn_is_avx(struct insn *insn)
return (insn->vex_prefix.value != 0);
}
+static inline int insn_is_evex(struct insn *insn)
+{
+ if (!insn->prefixes.got)
+ insn_get_prefixes(insn);
+ return (insn->vex_prefix.nbytes == 4);
+}
+
/* Ensure this instruction is decoded completely */
static inline int insn_complete(struct insn *insn)
{
@@ -144,8 +152,10 @@ static inline insn_byte_t insn_vex_m_bits(struct insn *insn)
{
if (insn->vex_prefix.nbytes == 2) /* 2 bytes VEX */
return X86_VEX2_M;
- else
+ else if (insn->vex_prefix.nbytes == 3) /* 3 bytes VEX */
return X86_VEX3_M(insn->vex_prefix.bytes[1]);
+ else /* EVEX */
+ return X86_EVEX_M(insn->vex_prefix.bytes[1]);
}
static inline insn_byte_t insn_vex_p_bits(struct insn *insn)