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From: Chenyi Qiang <chenyi.qiang@intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
	Richard Henderson <rth@twiddle.net>,
	Eduardo Habkost <ehabkost@redhat.com>
Cc: Xiaoyao Li <xiaoyao.li@intel.com>,
	qemu-devel@nongnu.org, Robert Hoo <robert.hu@linux.intel.com>
Subject: [PATCH v2 2/4] target/i386: add fast short REP MOV support
Date: Sat, 28 Mar 2020 11:06:23 +0800	[thread overview]
Message-ID: <20200328030625.16428-3-chenyi.qiang@intel.com> (raw)
In-Reply-To: <20200328030625.16428-1-chenyi.qiang@intel.com>

For CPUs support fast short REP MOV[CPUID.(EAX=7,ECX=0):EDX(bit4)], e.g
Icelake and Tigerlake, expose it to the guest VM.

Signed-off-by: Chenyi Qiang <chenyi.qiang@intel.com>
---
 target/i386/cpu.c | 2 +-
 target/i386/cpu.h | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 4123d5910e..b01421c6bb 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1077,7 +1077,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
         .type = CPUID_FEATURE_WORD,
         .feat_names = {
             NULL, NULL, "avx512-4vnniw", "avx512-4fmaps",
-            NULL, NULL, NULL, NULL,
+            "fsrm", NULL, NULL, NULL,
             NULL, NULL, "md-clear", NULL,
             NULL, NULL, NULL, NULL,
             NULL, NULL, NULL /* pconfig */, NULL,
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 60d797d594..f7ba813cab 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -770,6 +770,8 @@ typedef uint64_t FeatureWordArray[FEATURE_WORDS];
 #define CPUID_7_0_EDX_AVX512_4VNNIW     (1U << 2)
 /* AVX512 Multiply Accumulation Single Precision */
 #define CPUID_7_0_EDX_AVX512_4FMAPS     (1U << 3)
+/* Fast Short Rep Mov */
+#define CPUID_7_0_EDX_FSRM              (1U << 4)
 /* Speculation Control */
 #define CPUID_7_0_EDX_SPEC_CTRL         (1U << 26)
 /* Single Thread Indirect Branch Predictors */
-- 
2.17.1



  parent reply	other threads:[~2020-03-28  3:07 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-28  3:06 [PATCH v2 0/4] modify CPU model info Chenyi Qiang
2020-03-28  3:06 ` [PATCH v2 1/4] target/i386: add missing vmx features for several CPU models Chenyi Qiang
2020-03-28  3:06 ` Chenyi Qiang [this message]
2020-03-28  3:06 ` [PATCH v2 3/4] target/i386: add the missing features for Icelake-Server CPU model Chenyi Qiang
2020-03-28  5:12   ` Xiaoyao Li
2020-03-31  8:39   ` Robert Hoo
2020-03-28  3:06 ` [PATCH v2 4/4] target/i386: modify Icelake-Client and Icelake-Server CPU model number Chenyi Qiang
2020-04-07  8:59 ` [PATCH v2 0/4] modify CPU model info Chenyi Qiang

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