From 5840880e2ed3747464242e0559a6cf7ec4e55a11 Mon Sep 17 00:00:00 2001 From: "plai@redhat.com" Date: Thu, 21 Jan 2021 17:43:53 -0500 Subject: [PATCH 3/5] x86/cpu: Add AVX512_FP16 cpu feature RH-Author: plai@redhat.com Message-id: <20210121174353.16032-1-plai@redhat.com> Patchwork-id: 100758 O-Subject: [RHEL8.4 AV qemu-kvm PATCH] x86/cpu: Add AVX512_FP16 cpu feature Bugzilla: 1838738 RH-Acked-by: Eduardo Habkost RH-Acked-by: Michael S. Tsirkin RH-Acked-by: Bandan Das From: Cathy Zhang BZ https://bugzilla.redhat.com/show_bug.cgi?id=1838738 Brew: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=34299228 x86 https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=34299267 Branch rhel-av-8.4.0 Tested on intel-eaglestream-spr-01.khw1.lab.eng.bos.redhat.com. All flags found as expected avx512_vp2intersect, serialize, and avx512_fp16 except: tsxldtrk Cpuid reports CPUID.(7.0).EDX[16] isn't enabled on this CPU. Leaf Subleaf EAX EBX ECX EDX 00000007 00000000: 00000001 .... f3bfbfef .... fa417f5e ^.A. ff8c4532 2E.. Already in rhel-av-8.4.0 (rebased to v5.2.0 ): 353f98c9a x86/cpu: Enable AVX512_VP2INTERSECT cpu feature 5dd13f2a5 target/i386: Add SERIALIZE cpu feature b3c7344e3 target/i386: Enable TSX Suspend Load Address Tracking feature Signed-off-by: Eduardo Lima (Etrunko) --- 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 dc592e990e..f944b41573 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -977,7 +977,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = { "avx512-vp2intersect", NULL, "md-clear", NULL, NULL, NULL, "serialize", NULL, "tsx-ldtrk", NULL, NULL /* pconfig */, NULL, - NULL, NULL, NULL, NULL, + NULL, NULL, NULL, "avx512-fp16", NULL, NULL, "spec-ctrl", "stibp", NULL, "arch-capabilities", "core-capability", "ssbd", }, diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 88e8586f8f..a3db7e3c6c 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -783,6 +783,8 @@ typedef uint64_t FeatureWordArray[FEATURE_WORDS]; #define CPUID_7_0_EDX_SERIALIZE (1U << 14) /* TSX Suspend Load Address Tracking instruction */ #define CPUID_7_0_EDX_TSX_LDTRK (1U << 16) +/* AVX512_FP16 instruction */ +#define CPUID_7_0_EDX_AVX512_FP16 (1U << 23) /* Speculation Control */ #define CPUID_7_0_EDX_SPEC_CTRL (1U << 26) /* Single Thread Indirect Branch Predictors */ -- 2.18.4