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