commit d1a1111514333e46a98b136235f71eef90d610fa
author Jiaxi Chen <jiaxi.chen@linux.intel.com> Fri Mar 03 14:59:13 2023 +0800
committer Paolo Bonzini <pbonzini@redhat.com> Fri Apr 28 12:50:34 2023 +0200
tree 8c22f294797bee6f21197c1d57d0dbe4d2deebad
parent ecd2e6ca037d7bf3673c5478590d686d5cd6135a

target/i386: Add support for PREFETCHIT0/1 in CPUID enumeration

Latest Intel platform Granite Rapids has introduced a new instruction -
PREFETCHIT0/1, which moves code to memory (cache) closer to the
processor depending on specific hints.

The bit definition:
CPUID.(EAX=7,ECX=1):EDX[bit 14]

Add CPUID definition for PREFETCHIT0/1.

Signed-off-by: Jiaxi Chen <jiaxi.chen@linux.intel.com>
Signed-off-by: Tao Su <tao1.su@linux.intel.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Message-Id: <20230303065913.1246327-7-tao1.su@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

target/i386/cpu.c

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 0204a3a..823320f 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -897,7 +897,7 @@
             NULL, NULL, NULL, NULL,
             "avx-vnni-int8", "avx-ne-convert", NULL, NULL,
             NULL, NULL, NULL, NULL,
-            NULL, NULL, NULL, NULL,
+            NULL, NULL, "prefetchiti", NULL,
             NULL, NULL, NULL, NULL,
             NULL, NULL, NULL, NULL,
             NULL, NULL, NULL, NULL,

target/i386/cpu.h

diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index b46d52f..8504aaa 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -925,6 +925,8 @@
 #define CPUID_7_1_EDX_AVX_VNNI_INT8     (1U << 4)
 /* AVX NE CONVERT Instructions */
 #define CPUID_7_1_EDX_AVX_NE_CONVERT    (1U << 5)
+/* PREFETCHIT0/1 Instructions */
+#define CPUID_7_1_EDX_PREFETCHITI       (1U << 14)
 
 /* XFD Extend Feature Disabled */
 #define CPUID_D_1_EAX_XFD               (1U << 4)