|
|
ddf19c |
From 72a1827006be22791017ff2b671eac1c96be5d12 Mon Sep 17 00:00:00 2001
|
|
|
ddf19c |
From: "plai@redhat.com" <plai@redhat.com>
|
|
|
ddf19c |
Date: Thu, 7 May 2020 22:09:23 +0100
|
|
|
ddf19c |
Subject: [PATCH 01/26] target/i386: set the CPUID level to 0x14 on old
|
|
|
ddf19c |
machine-type
|
|
|
ddf19c |
|
|
|
ddf19c |
RH-Author: plai@redhat.com
|
|
|
ddf19c |
Message-id: <20200507220923.13723-1-plai@redhat.com>
|
|
|
ddf19c |
Patchwork-id: 96347
|
|
|
ddf19c |
O-Subject: [RHEL8.2.1 AV qemu-kvm PATCH RESEND] target/i386: set the CPUID level to 0x14 on old machine-type
|
|
|
ddf19c |
Bugzilla: 1513681
|
|
|
ddf19c |
RH-Acked-by: Eduardo Habkost <ehabkost@redhat.com>
|
|
|
ddf19c |
RH-Acked-by: Igor Mammedov <imammedo@redhat.com>
|
|
|
ddf19c |
RH-Acked-by: Danilo de Paula <ddepaula@redhat.com>
|
|
|
ddf19c |
|
|
|
ddf19c |
From: Luwei Kang <luwei.kang@intel.com>
|
|
|
ddf19c |
|
|
|
ddf19c |
BZ https:
|
|
|
ddf19c |
Brew: http:
|
|
|
ddf19c |
Branch: rhel-av-8.2.1
|
|
|
ddf19c |
|
|
|
ddf19c |
Tested on intel-icelake-y-01.ml3.eng.bos.redhat.com.
|
|
|
ddf19c |
|
|
|
ddf19c |
The CPUID level need to be set to 0x14 manually on old
|
|
|
ddf19c |
machine-type if Intel PT is enabled in guest. E.g. the
|
|
|
ddf19c |
CPUID[0].EAX(level)=7 and CPUID[7].EBX[25](intel-pt)=1 when the
|
|
|
ddf19c |
Qemu with "-machine pc-i440fx-3.1 -cpu qemu64,+intel-pt" parameter.
|
|
|
ddf19c |
|
|
|
ddf19c |
Some Intel PT capabilities are exposed by leaf 0x14 and the
|
|
|
ddf19c |
missing capabilities will cause some MSRs access failed.
|
|
|
ddf19c |
This patch add a warning message to inform the user to extend
|
|
|
ddf19c |
the CPUID level.
|
|
|
ddf19c |
|
|
|
ddf19c |
Suggested-by: Eduardo Habkost <ehabkost@redhat.com>
|
|
|
ddf19c |
Signed-off-by: Luwei Kang <luwei.kang@intel.com>
|
|
|
ddf19c |
Message-Id: <1584031686-16444-1-git-send-email-luwei.kang@intel.com>
|
|
|
ddf19c |
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
|
|
|
ddf19c |
(cherry picked from commit ddc2fc9e4e42ebce48b088963dc7fbd1c08d5f33)
|
|
|
ddf19c |
Signed-off-by: Paul Lai <plai@redhat.com>
|
|
|
ddf19c |
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
|
|
|
ddf19c |
|
|
|
ddf19c |
target/i386/cpu.c | 11 ++++++++
|
|
|
ddf19c |
1 file changed, 8 insertions(+), 3 deletions(-)
|
|
|
ddf19c |
|
|
|
ddf19c |
diff
|
|
|
ddf19c |
index 1685a8c..0f0a2db 100644
|
|
|
ddf19c |
|
|
|
ddf19c |
|
|
|
ddf19c |
@@ -6206,9 +6206,14 @@ static void x86_cpu_expand_features(X86CPU *cpu, Error **errp)
|
|
|
ddf19c |
x86_cpu_adjust_feat_level(cpu, FEAT_XSAVE);
|
|
|
ddf19c |
|
|
|
ddf19c |
|
|
|
ddf19c |
- if ((env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_INTEL_PT) &&
|
|
|
ddf19c |
- kvm_enabled() && cpu->intel_pt_auto_level) {
|
|
|
ddf19c |
- x86_cpu_adjust_level(cpu, &cpu->env.cpuid_min_level, 0x14);
|
|
|
ddf19c |
+ if ((env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_INTEL_PT)) {
|
|
|
ddf19c |
+ if (cpu->intel_pt_auto_level) {
|
|
|
ddf19c |
+ x86_cpu_adjust_level(cpu, &cpu->env.cpuid_min_level, 0x14);
|
|
|
ddf19c |
+ } else if (cpu->env.cpuid_min_level < 0x14) {
|
|
|
ddf19c |
+ mark_unavailable_features(cpu, FEAT_7_0_EBX,
|
|
|
ddf19c |
+ CPUID_7_0_EBX_INTEL_PT,
|
|
|
ddf19c |
+ "Intel PT need CPUID leaf 0x14, please set by \"-cpu ...,+intel-pt,level=0x14\"");
|
|
|
ddf19c |
+ }
|
|
|
ddf19c |
}
|
|
|
ddf19c |
|
|
|
ddf19c |
|
|
|
ddf19c |
--
|
|
|
ddf19c |
1.8.3.1
|
|
|
ddf19c |
|