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i386: refactor KVM cpuid code so that it applies to hvf as well

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This patch generalizes some code in cpu.c for hypervisor-based
accelerators, calling the new hvf_get_supported_cpuid where
KVM used kvm_get_supported_cpuid.

Signed-off-by: Sergio Andres Gomez Del Real <Sergio.G.DelReal@gmail.com>
Message-Id: <20170913090522.4022-12-Sergio.G.DelReal@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sergio Andres Gomez Del Real 2017-09-13 04:05:19 -05:00 committed by Paolo Bonzini
parent db5cb9a032
commit d6dcc5583e
2 changed files with 59 additions and 22 deletions
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4
target/i386/cpu-qom.h
View File

@ -47,7 +47,7 @@ typedef struct X86CPUDefinition X86CPUDefinition;
/**
* X86CPUClass:
* @cpu_def: CPU model definition
* @kvm_required: Whether CPU model requires KVM to be enabled.
* @host_cpuid_required: Whether CPU model requires cpuid from host.
* @ordering: Ordering on the "-cpu help" CPU model list.
* @migration_safe: See CpuDefinitionInfo::migration_safe
* @static_model: See CpuDefinitionInfo::static
@ -66,7 +66,7 @@ typedef struct X86CPUClass {
*/
X86CPUDefinition *cpu_def;
bool kvm_required;
bool host_cpuid_required;
int ordering;
bool migration_safe;
bool static_model;

63
target/i386/cpu.c
View File

@ -22,6 +22,7 @@
#include "cpu.h"
#include "exec/exec-all.h"
#include "sysemu/kvm.h"
#include "sysemu/hvf.h"
#include "sysemu/cpus.h"
#include "kvm_i386.h"
@ -615,6 +616,11 @@ static uint32_t xsave_area_size(uint64_t mask)
return ret;
}
static inline bool accel_uses_host_cpuid(void)
{
return kvm_enabled() || hvf_enabled();
}
static inline uint64_t x86_cpu_xsave_components(X86CPU *cpu)
{
return ((uint64_t)cpu->env.features[FEAT_XSAVE_COMP_HI]) << 32 |
@ -1686,10 +1692,15 @@ static void max_x86_cpu_initfn(Object *obj)
*/
cpu->max_features = true;
if (kvm_enabled()) {
if (accel_uses_host_cpuid()) {
char vendor[CPUID_VENDOR_SZ + 1] = { 0 };
char model_id[CPUID_MODEL_ID_SZ + 1] = { 0 };
int family, model, stepping;
X86CPUDefinition host_cpudef = { };
uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
host_cpuid(0x0, 0, &eax, &ebx, &ecx, &edx);
x86_cpu_vendor_words2str(host_cpudef.vendor, ebx, edx, ecx);
host_vendor_fms(vendor, &family, &model, &stepping);
@ -1703,12 +1714,21 @@ static void max_x86_cpu_initfn(Object *obj)
object_property_set_str(OBJECT(cpu), model_id, "model-id",
&error_abort);
if (kvm_enabled()) {
env->cpuid_min_level =
kvm_arch_get_supported_cpuid(s, 0x0, 0, R_EAX);
env->cpuid_min_xlevel =
kvm_arch_get_supported_cpuid(s, 0x80000000, 0, R_EAX);
env->cpuid_min_xlevel2 =
kvm_arch_get_supported_cpuid(s, 0xC0000000, 0, R_EAX);
} else {
env->cpuid_min_level =
hvf_get_supported_cpuid(0x0, 0, R_EAX);
env->cpuid_min_xlevel =
hvf_get_supported_cpuid(0x80000000, 0, R_EAX);
env->cpuid_min_xlevel2 =
hvf_get_supported_cpuid(0xC0000000, 0, R_EAX);
}
if (lmce_supported()) {
object_property_set_bool(OBJECT(cpu), true, "lmce", &error_abort);
@ -1734,18 +1754,21 @@ static const TypeInfo max_x86_cpu_type_info = {
.class_init = max_x86_cpu_class_init,
};
#ifdef CONFIG_KVM
#if defined(CONFIG_KVM) || defined(CONFIG_HVF)
static void host_x86_cpu_class_init(ObjectClass *oc, void *data)
{
X86CPUClass *xcc = X86_CPU_CLASS(oc);
xcc->kvm_required = true;
xcc->host_cpuid_required = true;
xcc->ordering = 8;
if (kvm_enabled()) {
xcc->model_description =
"KVM processor with all supported host features "
"(only available in KVM mode)";
"KVM processor with all supported host features ";
} else if (hvf_enabled()) {
xcc->model_description =
"HVF processor with all supported host features ";
}
}
static const TypeInfo host_x86_cpu_type_info = {
@ -1767,7 +1790,7 @@ static void report_unavailable_features(FeatureWord w, uint32_t mask)
assert(reg);
warn_report("%s doesn't support requested feature: "
"CPUID.%02XH:%s%s%s [bit %d]",
kvm_enabled() ? "host" : "TCG",
accel_uses_host_cpuid() ? "host" : "TCG",
f->cpuid_eax, reg,
f->feat_names[i] ? "." : "",
f->feat_names[i] ? f->feat_names[i] : "", i);
@ -2218,7 +2241,7 @@ static void x86_cpu_class_check_missing_features(X86CPUClass *xcc,
Error *err = NULL;
strList **next = missing_feats;
if (xcc->kvm_required && !kvm_enabled()) {
if (xcc->host_cpuid_required && !accel_uses_host_cpuid()) {
strList *new = g_new0(strList, 1);
new->value = g_strdup("kvm");
*missing_feats = new;
@ -2380,6 +2403,10 @@ static uint32_t x86_cpu_get_supported_feature_word(FeatureWord w,
r = kvm_arch_get_supported_cpuid(kvm_state, wi->cpuid_eax,
wi->cpuid_ecx,
wi->cpuid_reg);
} else if (hvf_enabled()) {
r = hvf_get_supported_cpuid(wi->cpuid_eax,
wi->cpuid_ecx,
wi->cpuid_reg);
} else if (tcg_enabled()) {
r = wi->tcg_features;
} else {
@ -2439,6 +2466,7 @@ static void x86_cpu_load_def(X86CPU *cpu, X86CPUDefinition *def, Error **errp)
}
/* Special cases not set in the X86CPUDefinition structs: */
/* TODO: in-kernel irqchip for hvf */
if (kvm_enabled()) {
if (!kvm_irqchip_in_kernel()) {
x86_cpu_change_kvm_default("x2apic", "off");
@ -2459,7 +2487,7 @@ static void x86_cpu_load_def(X86CPU *cpu, X86CPUDefinition *def, Error **errp)
* when doing cross vendor migration
*/
vendor = def->vendor;
if (kvm_enabled()) {
if (accel_uses_host_cpuid()) {
uint32_t ebx = 0, ecx = 0, edx = 0;
host_cpuid(0, 0, NULL, &ebx, &ecx, &edx);
x86_cpu_vendor_words2str(host_vendor, ebx, edx, ecx);
@ -2910,6 +2938,11 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
*ebx = kvm_arch_get_supported_cpuid(s, 0xA, count, R_EBX);
*ecx = kvm_arch_get_supported_cpuid(s, 0xA, count, R_ECX);
*edx = kvm_arch_get_supported_cpuid(s, 0xA, count, R_EDX);
} else if (hvf_enabled() && cpu->enable_pmu) {
*eax = hvf_get_supported_cpuid(0xA, count, R_EAX);
*ebx = hvf_get_supported_cpuid(0xA, count, R_EBX);
*ecx = hvf_get_supported_cpuid(0xA, count, R_ECX);
*edx = hvf_get_supported_cpuid(0xA, count, R_EDX);
} else {
*eax = 0;
*ebx = 0;
@ -3261,6 +3294,9 @@ static void x86_cpu_reset(CPUState *s)
if (kvm_enabled()) {
kvm_arch_reset_vcpu(cpu);
}
else if (hvf_enabled()) {
hvf_reset_vcpu(s);
}
#endif
}
@ -3300,6 +3336,7 @@ APICCommonClass *apic_get_class(void)
{
const char *apic_type = "apic";
/* TODO: in-kernel irqchip for hvf */
if (kvm_apic_in_kernel()) {
apic_type = "kvm-apic";
} else if (xen_enabled()) {
@ -3613,7 +3650,7 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp)
Error *local_err = NULL;
static bool ht_warned;
if (xcc->kvm_required && !kvm_enabled()) {
if (xcc->host_cpuid_required && !accel_uses_host_cpuid()) {
char *name = x86_cpu_class_get_model_name(xcc);
error_setg(&local_err, "CPU model '%s' requires KVM", name);
g_free(name);
@ -3635,7 +3672,7 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp)
x86_cpu_report_filtered_features(cpu);
if (cpu->enforce_cpuid) {
error_setg(&local_err,
kvm_enabled() ?
accel_uses_host_cpuid() ?
"Host doesn't support requested features" :
"TCG doesn't support requested features");
goto out;
@ -3658,7 +3695,7 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp)
* consumer AMD devices but nothing else.
*/
if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM) {
if (kvm_enabled()) {
if (accel_uses_host_cpuid()) {
uint32_t host_phys_bits = x86_host_phys_bits();
static bool warned;
@ -4272,7 +4309,7 @@ static void x86_cpu_register_types(void)
}
type_register_static(&max_x86_cpu_type_info);
type_register_static(&x86_base_cpu_type_info);
#ifdef CONFIG_KVM
#if defined(CONFIG_KVM) || defined(CONFIG_HVF)
type_register_static(&host_x86_cpu_type_info);
#endif
}