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target-i386: Convert kvm_default_*features to property/value pairs 

Convert the kvm_default_features and kvm_default_unset_features arrays
into a simple list of property/value pairs that will be applied to
X86CPU objects when using KVM.

Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Eduardo Habkost 2015-09-11 12:40:27 -03:00
parent a32ef3bfc1
commit 5114e84222
4 changed files with 65 additions and 45 deletions
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8
hw/i386/pc_piix.c
View File

@ -332,7 +332,7 @@ static void pc_compat_2_1(MachineState *machine)
pc_compat_2_2(machine);
smbios_uuid_encoded = false;
x86_cpu_compat_kvm_no_autodisable(FEAT_8000_0001_ECX, CPUID_EXT3_SVM);
x86_cpu_change_kvm_default("svm", NULL);
pcms->enforce_aligned_dimm = false;
}
@ -368,7 +368,7 @@ static void pc_compat_1_7(MachineState *machine)
gigabyte_align = false;
option_rom_has_mr = true;
legacy_acpi_table_size = 6414;
x86_cpu_compat_kvm_no_autoenable(FEAT_1_ECX, CPUID_EXT_X2APIC);
x86_cpu_change_kvm_default("x2apic", NULL);
}
static void pc_compat_1_6(MachineState *machine)
@ -398,7 +398,7 @@ static void pc_compat_1_3(MachineState *machine)
static void pc_compat_1_2(MachineState *machine)
{
pc_compat_1_3(machine);
x86_cpu_compat_kvm_no_autoenable(FEAT_KVM, 1 << KVM_FEATURE_PV_EOI);
x86_cpu_change_kvm_default("kvm-pv-eoi", NULL);
}
/* PC compat function for pc-0.10 to pc-0.13 */
@ -421,7 +421,7 @@ static void pc_init_isa(MachineState *machine)
if (!machine->cpu_model) {
machine->cpu_model = "486";
}
x86_cpu_compat_kvm_no_autoenable(FEAT_KVM, 1 << KVM_FEATURE_PV_EOI);
x86_cpu_change_kvm_default("kvm-pv-eoi", NULL);
enable_compat_apic_id_mode();
pc_init1(machine, TYPE_I440FX_PCI_HOST_BRIDGE, TYPE_I440FX_PCI_DEVICE);
}

4
hw/i386/pc_q35.c
View File

@ -316,7 +316,7 @@ static void pc_compat_2_1(MachineState *machine)
pc_compat_2_2(machine);
pcms->enforce_aligned_dimm = false;
smbios_uuid_encoded = false;
x86_cpu_compat_kvm_no_autodisable(FEAT_8000_0001_ECX, CPUID_EXT3_SVM);
x86_cpu_change_kvm_default("svm", NULL);
}
static void pc_compat_2_0(MachineState *machine)
@ -333,7 +333,7 @@ static void pc_compat_1_7(MachineState *machine)
smbios_defaults = false;
gigabyte_align = false;
option_rom_has_mr = true;
x86_cpu_compat_kvm_no_autoenable(FEAT_1_ECX, CPUID_EXT_X2APIC);
x86_cpu_change_kvm_default("x2apic", NULL);
}
static void pc_compat_1_6(MachineState *machine)

87
target-i386/cpu.c
View File

@ -478,38 +478,6 @@ const char *get_register_name_32(unsigned int reg)
return x86_reg_info_32[reg].name;
}
/* KVM-specific features that are automatically added to all CPU models
* when KVM is enabled.
*/
static uint32_t kvm_default_features[FEATURE_WORDS] = {
[FEAT_KVM] = (1 << KVM_FEATURE_CLOCKSOURCE) |
(1 << KVM_FEATURE_NOP_IO_DELAY) |
(1 << KVM_FEATURE_CLOCKSOURCE2) |
(1 << KVM_FEATURE_ASYNC_PF) |
(1 << KVM_FEATURE_STEAL_TIME) |
(1 << KVM_FEATURE_PV_EOI) |
(1 << KVM_FEATURE_CLOCKSOURCE_STABLE_BIT),
[FEAT_1_ECX] = CPUID_EXT_X2APIC,
};
/* Features that are not added by default to any CPU model when KVM is enabled.
*/
static uint32_t kvm_default_unset_features[FEATURE_WORDS] = {
[FEAT_1_EDX] = CPUID_ACPI,
[FEAT_1_ECX] = CPUID_EXT_MONITOR,
[FEAT_8000_0001_ECX] = CPUID_EXT3_SVM,
};
void x86_cpu_compat_kvm_no_autoenable(FeatureWord w, uint32_t features)
{
kvm_default_features[w] &= ~features;
}
void x86_cpu_compat_kvm_no_autodisable(FeatureWord w, uint32_t features)
{
kvm_default_unset_features[w] &= ~features;
}
/*
* Returns the set of feature flags that are supported and migratable by
* QEMU, for a given FeatureWord.
@ -1392,6 +1360,43 @@ static X86CPUDefinition builtin_x86_defs[] = {
},
};
typedef struct PropValue {
const char *prop, *value;
} PropValue;
/* KVM-specific features that are automatically added/removed
* from all CPU models when KVM is enabled.
*/
static PropValue kvm_default_props[] = {
{ "kvmclock", "on" },
{ "kvm-nopiodelay", "on" },
{ "kvm-asyncpf", "on" },
{ "kvm-steal-time", "on" },
{ "kvm-pv-eoi", "on" },
{ "kvmclock-stable-bit", "on" },
{ "x2apic", "on" },
{ "acpi", "off" },
{ "monitor", "off" },
{ "svm", "off" },
{ NULL, NULL },
};
void x86_cpu_change_kvm_default(const char *prop, const char *value)
{
PropValue *pv;
for (pv = kvm_default_props; pv->prop; pv++) {
if (!strcmp(pv->prop, prop)) {
pv->value = value;
break;
}
}
/* It is valid to call this function only for properties that
* are already present in the kvm_default_props table.
*/
assert(pv->prop);
}
static uint32_t x86_cpu_get_supported_feature_word(FeatureWord w,
bool migratable_only);
@ -2061,6 +2066,18 @@ static int x86_cpu_filter_features(X86CPU *cpu)
return rv;
}
static void x86_cpu_apply_props(X86CPU *cpu, PropValue *props)
{
PropValue *pv;
for (pv = props; pv->prop; pv++) {
if (!pv->value) {
continue;
}
object_property_parse(OBJECT(cpu), pv->value, pv->prop,
&error_abort);
}
}
/* Load data from X86CPUDefinition
*/
static void x86_cpu_load_def(X86CPU *cpu, X86CPUDefinition *def, Error **errp)
@ -2084,11 +2101,7 @@ static void x86_cpu_load_def(X86CPU *cpu, X86CPUDefinition *def, Error **errp)
/* Special cases not set in the X86CPUDefinition structs: */
if (kvm_enabled()) {
FeatureWord w;
for (w = 0; w < FEATURE_WORDS; w++) {
env->features[w] |= kvm_default_features[w];
env->features[w] &= ~kvm_default_unset_features[w];
}
x86_cpu_apply_props(cpu, kvm_default_props);
}
env->features[FEAT_1_ECX] |= CPUID_EXT_HYPERVISOR;

11
target-i386/cpu.h
View File

@ -1341,8 +1341,15 @@ void cpu_smm_update(X86CPU *cpu);
void cpu_report_tpr_access(CPUX86State *env, TPRAccess access);
void x86_cpu_compat_kvm_no_autoenable(FeatureWord w, uint32_t features);
void x86_cpu_compat_kvm_no_autodisable(FeatureWord w, uint32_t features);
/* Change the value of a KVM-specific default
*
* If value is NULL, no default will be set and the original
* value from the CPU model table will be kept.
*
* It is valid to call this funciton only for properties that
* are already present in the kvm_default_props table.
*/
void x86_cpu_change_kvm_default(const char *prop, const char *value);
/* Return name of 32-bit register, from a R_* constant */