From e106165de465520a2bd1153dd41fe409e0157a77 Mon Sep 17 00:00:00 2001 From: Eduardo Habkost Date: Fri, 4 Oct 2019 19:57:14 +0200 Subject: [PATCH 4/4] i386: remove the 'INTEL_PT' CPUID bit from Cascadelake-Server RH-Author: Eduardo Habkost Message-id: <20191004195714.10176-4-ehabkost@redhat.com> Patchwork-id: 90961 O-Subject: [RHEL-7.8 qemu-kvm-rhev PATCH 3/3] i386: remove the 'INTEL_PT' CPUID bit from Cascadelake-Server Bugzilla: 1638472 RH-Acked-by: Paolo Bonzini RH-Acked-by: Dr. David Alan Gilbert RH-Acked-by: Igor Mammedov From: Paolo Bonzini This is a partial cherry pick of upstream commit: commit 4c257911dcc7c4189768e9651755c849ce9db4e8 Author: Paolo Bonzini Date: Fri Dec 21 12:35:56 2018 +0100 i386: remove the 'INTEL_PT' CPUID bit from named CPU models Processor tracing is not yet implemented for KVM and it will be an opt in feature requiring a special module parameter. Disable it, because it is wrong to enable it by default and it is impossible that no one has ever used it. Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini It includes only the Cascadelake-Server change, because the other CPU models are not present in the RHEL7 tree. Signed-off-by: Eduardo Habkost Signed-off-by: Miroslav Rezanina --- target/i386/cpu.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index b377564..6a1d59c 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -2515,8 +2515,7 @@ static X86CPUDefinition builtin_x86_defs[] = { CPUID_7_0_EBX_SMAP | CPUID_7_0_EBX_MPX | CPUID_7_0_EBX_CLWB | CPUID_7_0_EBX_AVX512F | CPUID_7_0_EBX_AVX512DQ | CPUID_7_0_EBX_AVX512BW | CPUID_7_0_EBX_AVX512CD | - CPUID_7_0_EBX_AVX512VL | CPUID_7_0_EBX_CLFLUSHOPT | - CPUID_7_0_EBX_INTEL_PT, + CPUID_7_0_EBX_AVX512VL | CPUID_7_0_EBX_CLFLUSHOPT, .features[FEAT_7_0_ECX] = CPUID_7_0_ECX_PKU | CPUID_7_0_ECX_AVX512VNNI, -- 1.8.3.1