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From 2986c1070e031d290c268fba039e3eac97b28467 Mon Sep 17 00:00:00 2001
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From: Eduardo Habkost <ehabkost@redhat.com>
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Date: Thu, 21 Aug 2014 19:58:17 +0200
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Subject: [PATCH 2/3] pc: Add Broadwell CPUID compatibility bits
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Message-id: <1408651097-24190-3-git-send-email-ehabkost@redhat.com>
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Patchwork-id: 60671
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O-Subject: [RHEL7.1 qemu-kvm PATCH 2/2] pc: Add Broadwell CPUID compatibility bits
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Bugzilla: 1116117
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RH-Acked-by: Bandan Das <bsd@redhat.com>
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RH-Acked-by: Markus Armbruster <armbru@redhat.com>
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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On RHEL-6, the Broadwell CPU model won't have the RDTSCP and SMAP
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features. Add compatibility code to ensure we stay compatible when
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migrating from RHEL-6.
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Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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hw/i386/pc_piix.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
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index 550acd8..4ea3f67 100644
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--- a/hw/i386/pc_piix.c
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+++ b/hw/i386/pc_piix.c
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@@ -935,6 +935,10 @@ static void pc_compat_rhel650(QEMUMachineInitArgs *args)
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CPUID_EXT2_CX8 | CPUID_EXT2_MCE | CPUID_EXT2_PAE | CPUID_EXT2_MSR |
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CPUID_EXT2_TSC | CPUID_EXT2_PSE | CPUID_EXT2_DE | CPUID_EXT2_FPU,
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0);
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+ x86_cpu_compat_set_features("Broadwell", FEAT_8000_0001_EDX,
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+ 0, CPUID_EXT2_RDTSCP);
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+ x86_cpu_compat_set_features("Broadwell", FEAT_7_0_EBX,
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+ 0, CPUID_7_0_EBX_SMAP);
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/* RHEL-6 kernel never supported exposing RDTSCP */
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x86_cpu_compat_set_features(NULL, FEAT_8000_0001_EDX, 0, CPUID_EXT2_RDTSCP);
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--
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1.8.3.1
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