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From 1e661277e83c9b2e29bf5e2e77f358355aa11c8a Mon Sep 17 00:00:00 2001
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From: "plai@redhat.com" <plai@redhat.com>
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Date: Wed, 3 Apr 2019 15:54:28 +0100
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Subject: [PATCH 04/10] i386: Add CPUID bit for WBNOINVD
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RH-Author: plai@redhat.com
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Message-id: <1554306874-28796-5-git-send-email-plai@redhat.com>
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Patchwork-id: 85382
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O-Subject: [RHEL8.1 qemu-kvm PATCH resend 04/10] i386: Add CPUID bit for WBNOINVD
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Bugzilla: 1561761
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RH-Acked-by: Eduardo Habkost <ehabkost@redhat.com>
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RH-Acked-by: Igor Mammedov <imammedo@redhat.com>
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RH-Acked-by: Michael S. Tsirkin <mst@redhat.com>
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From: Robert Hoo <robert.hu@linux.intel.com>
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WBNOINVD: Write back and do not invalidate cache, enumerated by
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CPUID.(EAX=80000008H, ECX=0):EBX[bit 9].
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Signed-off-by: Robert Hoo <robert.hu@linux.intel.com>
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Message-Id: <1530781798-183214-5-git-send-email-robert.hu@linux.intel.com>
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Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
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(cherry picked from commit 59a80a19ca31a6fff9fdbb6b4cf55a5a0767c3bc)
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Signed-off-by: Paul Lai <plai@redhat.com>
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Resolved Conflicts:
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target/i386/cpu.h
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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 | 2 ++
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2 files changed, 3 insertions(+), 1 deletion(-)
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diff --git a/target/i386/cpu.c b/target/i386/cpu.c
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index fec39bd..8b9a9f6 100644
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--- a/target/i386/cpu.c
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+++ b/target/i386/cpu.c
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@@ -1036,7 +1036,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
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.feat_names = {
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NULL, NULL, NULL, NULL,
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NULL, NULL, NULL, NULL,
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- NULL, NULL, NULL, NULL,
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+ NULL, "wbnoinvd", NULL, NULL,
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"ibpb", NULL, NULL, NULL,
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NULL, NULL, NULL, NULL,
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NULL, NULL, NULL, NULL,
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diff --git a/target/i386/cpu.h b/target/i386/cpu.h
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index 3b2ea97..dd4493e 100644
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--- a/target/i386/cpu.h
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+++ b/target/i386/cpu.h
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@@ -693,6 +693,8 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS];
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#define KVM_HINTS_DEDICATED (1U << 0)
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+#define CPUID_8000_0008_EBX_WBNOINVD (1U << 9) /* Write back and
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+ do not invalidate cache */
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#define CPUID_8000_0008_EBX_IBPB (1U << 12) /* Indirect Branch Prediction Barrier */
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#define CPUID_XSAVE_XSAVEOPT (1U << 0)
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--
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1.8.3.1
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