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From a10f2cff4a418edae4f3040c4bf09e5aad80316a Mon Sep 17 00:00:00 2001
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From: "plai@redhat.com" <plai@redhat.com>
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Date: Mon, 20 May 2019 20:05:56 +0100
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Subject: [PATCH 1/5] x86/cpu: Enable CLDEMOTE(Demote Cache Line) cpu feature
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RH-Author: plai@redhat.com
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Message-id: <1554409731-21082-1-git-send-email-plai@redhat.com>
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Patchwork-id: 85447
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O-Subject: [RHEL8.1 qemu-kvm PATCH] x86/cpu: Enable CLDEMOTE(Demote Cache Line) cpu feature
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Bugzilla: 1696436
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RH-Acked-by: Eduardo Habkost <ehabkost@redhat.com>
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RH-Acked-by: John Snow <jsnow@redhat.com>
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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From: Jingqi Liu <jingqi.liu@intel.com>
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BZ: https://bugzilla.redhat.com/show_bug.cgi?id=1696436
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Brew: http://brewweb.devel.redhat.com/brew/taskinfo?taskID=20946375
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Branch: rhel-8.1.0
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Tested by Intel QA on SNR (simics)
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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target/i386/cpu.c | 2 +-
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target/i386/cpu.h | 1 +
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2 files changed, 2 insertions(+), 1 deletion(-)
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diff --git a/target/i386/cpu.c b/target/i386/cpu.c
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index 8ff6c38..77be7e8 100644
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--- a/target/i386/cpu.c
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+++ b/target/i386/cpu.c
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@@ -1025,7 +1025,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
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"avx512bitalg", NULL, "avx512-vpopcntdq", NULL,
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"la57", NULL, NULL, NULL,
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NULL, NULL, "rdpid", NULL,
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- NULL, NULL, NULL, NULL,
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+ NULL, "cldemote", NULL, NULL,
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NULL, NULL, NULL, NULL,
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},
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.cpuid = {
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diff --git a/target/i386/cpu.h b/target/i386/cpu.h
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index 3ae0e8c..4f9df6e 100644
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--- a/target/i386/cpu.h
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+++ b/target/i386/cpu.h
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@@ -684,6 +684,7 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS];
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#define CPUID_7_0_ECX_AVX512_VPOPCNTDQ (1U << 14) /* POPCNT for vectors of DW/QW */
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#define CPUID_7_0_ECX_LA57 (1U << 16)
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#define CPUID_7_0_ECX_RDPID (1U << 22)
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+#define CPUID_7_0_ECX_CLDEMOTE (1U << 25) /* CLDEMOTE Instruction */
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#define CPUID_7_0_EDX_AVX512_4VNNIW (1U << 2) /* AVX512 Neural Network Instructions */
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#define CPUID_7_0_EDX_AVX512_4FMAPS (1U << 3) /* AVX512 Multiply Accumulation Single Precision */
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--
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1.8.3.1
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