|
 |
1bdc94 |
From ed04f30927017781f0aa6aa5f9bd734320f4a330 Mon Sep 17 00:00:00 2001
|
|
|
1bdc94 |
From: Eduardo Habkost <ehabkost@redhat.com>
|
|
|
1bdc94 |
Date: Tue, 21 Aug 2018 18:53:11 +0200
|
|
|
1bdc94 |
Subject: [PATCH 4/5] i386: Disable TOPOEXT by default on "-cpu host"
|
|
|
1bdc94 |
|
|
|
1bdc94 |
RH-Author: Eduardo Habkost <ehabkost@redhat.com>
|
|
|
1bdc94 |
Message-id: <20180821185311.27865-1-ehabkost@redhat.com>
|
|
|
1bdc94 |
Patchwork-id: 81903
|
|
|
1bdc94 |
O-Subject: [RHEL-7.6 qemu-kvm-rhev PATCH] i386: Disable TOPOEXT by default on "-cpu host"
|
|
|
1bdc94 |
Bugzilla: 1613277
|
|
|
1bdc94 |
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
|
|
|
1bdc94 |
RH-Acked-by: Igor Mammedov <imammedo@redhat.com>
|
|
|
1bdc94 |
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
|
|
|
1bdc94 |
|
|
|
1bdc94 |
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1613277
|
|
|
1bdc94 |
Brew: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=17980585
|
|
|
1bdc94 |
|
|
|
1bdc94 |
Enabling TOPOEXT is always allowed, but it can't be enabled
|
|
|
1bdc94 |
blindly by "-cpu host" because it may make guests crash if the
|
|
|
1bdc94 |
rest of the cache topology information isn't provided or isn't
|
|
|
1bdc94 |
consistent.
|
|
|
1bdc94 |
|
|
|
1bdc94 |
This addresses the bug reported at:
|
|
|
1bdc94 |
https://bugzilla.redhat.com/show_bug.cgi?id=1613277
|
|
|
1bdc94 |
|
|
|
1bdc94 |
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
|
|
|
1bdc94 |
Message-Id: <20180809221852.15285-1-ehabkost@redhat.com>
|
|
|
1bdc94 |
Tested-by: Richard W.M. Jones <rjones@redhat.com>
|
|
|
1bdc94 |
Reviewed-by: Babu Moger <babu.moger@amd.com>
|
|
|
1bdc94 |
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
|
|
|
1bdc94 |
(cherry picked from commit 7210a02c58572b2686a3a8d610c6628f87864aed)
|
|
|
1bdc94 |
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
|
|
|
1bdc94 |
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
|
|
|
1bdc94 |
---
|
|
|
1bdc94 |
target/i386/cpu.c | 6 ++++++
|
|
|
1bdc94 |
1 file changed, 6 insertions(+)
|
|
|
1bdc94 |
|
|
|
1bdc94 |
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
|
|
|
1bdc94 |
index eabe4ea..e6ad66c 100644
|
|
|
1bdc94 |
--- a/target/i386/cpu.c
|
|
|
1bdc94 |
+++ b/target/i386/cpu.c
|
|
|
1bdc94 |
@@ -852,6 +852,12 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
|
|
|
1bdc94 |
},
|
|
|
1bdc94 |
.cpuid_eax = 0x80000001, .cpuid_reg = R_ECX,
|
|
|
1bdc94 |
.tcg_features = TCG_EXT3_FEATURES,
|
|
|
1bdc94 |
+ /*
|
|
|
1bdc94 |
+ * TOPOEXT is always allowed but can't be enabled blindly by
|
|
|
1bdc94 |
+ * "-cpu host", as it requires consistent cache topology info
|
|
|
1bdc94 |
+ * to be provided so it doesn't confuse guests.
|
|
|
1bdc94 |
+ */
|
|
|
1bdc94 |
+ .no_autoenable_flags = CPUID_EXT3_TOPOEXT,
|
|
|
1bdc94 |
},
|
|
|
1bdc94 |
[FEAT_C000_0001_EDX] = {
|
|
|
1bdc94 |
.feat_names = {
|
|
|
1bdc94 |
--
|
|
|
1bdc94 |
1.8.3.1
|
|
|
1bdc94 |
|