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i386: extended the cpuid_level when Intel PT is enabled 

Intel Processor Trace required CPUID[0x14] but the cpuid_level
have no change when create a kvm guest with
e.g. "-cpu qemu64,+intel-pt".

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Luwei Kang <luwei.kang@intel.com>
Message-Id: <1548805979-12321-1-git-send-email-luwei.kang@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Luwei Kang 2019-01-29 18:52:59 -05:00 committed by Paolo Bonzini
parent 840159e48c
commit f24c3a79a4
3 changed files with 13 additions and 0 deletions
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1
hw/i386/pc.c
View File

@ -136,6 +136,7 @@ GlobalProperty pc_compat_3_1[] = {
{ "Icelake-Client" "-" TYPE_X86_CPU, "mpx", "on" },
{ "Icelake-Server" "-" TYPE_X86_CPU, "mpx", "on" },
{ "Cascadelake-Server" "-" TYPE_X86_CPU, "stepping", "5" },
{ TYPE_X86_CPU, "x-intel-pt-auto-level", "off" },
};
const size_t pc_compat_3_1_len = G_N_ELEMENTS(pc_compat_3_1);

9
target/i386/cpu.c
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@ -5031,6 +5031,13 @@ static void x86_cpu_expand_features(X86CPU *cpu, Error **errp)
x86_cpu_adjust_feat_level(cpu, FEAT_C000_0001_EDX);
x86_cpu_adjust_feat_level(cpu, FEAT_SVM);
x86_cpu_adjust_feat_level(cpu, FEAT_XSAVE);
/* Intel Processor Trace requires CPUID[0x14] */
if ((env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_INTEL_PT) &&
kvm_enabled() && cpu->intel_pt_auto_level) {
x86_cpu_adjust_level(cpu, &cpu->env.cpuid_min_level, 0x14);
}
/* SVM requires CPUID[0x8000000A] */
if (env->features[FEAT_8000_0001_ECX] & CPUID_EXT3_SVM) {
x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000000A);
@ -5824,6 +5831,8 @@ static Property x86_cpu_properties[] = {
DEFINE_PROP_INT32("x-hv-max-vps", X86CPU, hv_max_vps, -1),
DEFINE_PROP_BOOL("x-hv-synic-kvm-only", X86CPU, hyperv_synic_kvm_only,
false),
DEFINE_PROP_BOOL("x-intel-pt-auto-level", X86CPU, intel_pt_auto_level,
true),
DEFINE_PROP_END_OF_LIST()
};

3
target/i386/cpu.h
View File

@ -1454,6 +1454,9 @@ struct X86CPU {
/* Enable auto level-increase for all CPUID leaves */
bool full_cpuid_auto_level;
/* Enable auto level-increase for Intel Processor Trace leave */
bool intel_pt_auto_level;
/* if true fill the top bits of the MTRR_PHYSMASKn variable range */
bool fill_mtrr_mask;