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i386: introduce hv_cpuid_get_host()

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As a preparation to implementing hv_cpuid_cache intro introduce
hv_cpuid_get_host(). No functional change intended.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20210422161130.652779-7-vkuznets@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Vitaly Kuznetsov 2021-04-22 18:11:17 +02:00 • committed by Eduardo Habkost
parent 7682f857f4
commit e1a66a1e27
1 changed files with 53 additions and 41 deletions
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84
target/i386/kvm/kvm.c
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@ -1108,6 +1108,19 @@ static int hv_cpuid_get_fw(struct kvm_cpuid2 *cpuid, int fw, uint32_t *r)
return 0; return 0;
} }
static uint32_t hv_cpuid_get_host(struct kvm_cpuid2 *cpuid, uint32_t func,
int reg)
{
struct kvm_cpuid_entry2 *entry;
entry = cpuid_find_entry(cpuid, func, 0);
if (!entry) {
return 0;
}
return cpuid_entry_get_reg(entry, reg);
}
static bool hyperv_feature_supported(struct kvm_cpuid2 *cpuid, int feature) static bool hyperv_feature_supported(struct kvm_cpuid2 *cpuid, int feature)
{ {
uint32_t r, fw, bits; uint32_t r, fw, bits;
@ -1204,7 +1217,7 @@ static int hyperv_handle_properties(CPUState *cs,
{ {
X86CPU *cpu = X86_CPU(cs); X86CPU *cpu = X86_CPU(cs);
struct kvm_cpuid2 *cpuid; struct kvm_cpuid2 *cpuid;
struct kvm_cpuid_entry2 *c, *c2; struct kvm_cpuid_entry2 *c;
uint32_t cpuid_i = 0; uint32_t cpuid_i = 0;
int r; int r;
@ -1236,46 +1249,47 @@ static int hyperv_handle_properties(CPUState *cs,
} }
if (cpu->hyperv_passthrough) { if (cpu->hyperv_passthrough) {
c = cpuid_find_entry(cpuid, HV_CPUID_VENDOR_AND_MAX_FUNCTIONS, 0); cpu->hyperv_vendor_id[0] =
if (c) { hv_cpuid_get_host(cpuid, HV_CPUID_VENDOR_AND_MAX_FUNCTIONS, R_EBX);
cpu->hyperv_vendor_id[0] = c->ebx; cpu->hyperv_vendor_id[1] =
cpu->hyperv_vendor_id[1] = c->ecx; hv_cpuid_get_host(cpuid, HV_CPUID_VENDOR_AND_MAX_FUNCTIONS, R_ECX);
cpu->hyperv_vendor_id[2] = c->edx; cpu->hyperv_vendor_id[2] =
hv_cpuid_get_host(cpuid, HV_CPUID_VENDOR_AND_MAX_FUNCTIONS, R_EDX);
cpu->hyperv_vendor = g_realloc(cpu->hyperv_vendor, cpu->hyperv_vendor = g_realloc(cpu->hyperv_vendor,
sizeof(cpu->hyperv_vendor_id) + 1); sizeof(cpu->hyperv_vendor_id) + 1);
memcpy(cpu->hyperv_vendor, cpu->hyperv_vendor_id, memcpy(cpu->hyperv_vendor, cpu->hyperv_vendor_id,
sizeof(cpu->hyperv_vendor_id)); sizeof(cpu->hyperv_vendor_id));
cpu->hyperv_vendor[sizeof(cpu->hyperv_vendor_id)] = 0; cpu->hyperv_vendor[sizeof(cpu->hyperv_vendor_id)] = 0;
}
c = cpuid_find_entry(cpuid, HV_CPUID_INTERFACE, 0); cpu->hyperv_interface_id[0] =
if (c) { hv_cpuid_get_host(cpuid, HV_CPUID_INTERFACE, R_EAX);
cpu->hyperv_interface_id[0] = c->eax; cpu->hyperv_interface_id[1] =
cpu->hyperv_interface_id[1] = c->ebx; hv_cpuid_get_host(cpuid, HV_CPUID_INTERFACE, R_EBX);
cpu->hyperv_interface_id[2] = c->ecx; cpu->hyperv_interface_id[2] =
cpu->hyperv_interface_id[3] = c->edx; hv_cpuid_get_host(cpuid, HV_CPUID_INTERFACE, R_ECX);
} cpu->hyperv_interface_id[3] =
hv_cpuid_get_host(cpuid, HV_CPUID_INTERFACE, R_EDX);
c = cpuid_find_entry(cpuid, HV_CPUID_VERSION, 0); cpu->hyperv_version_id[0] =
if (c) { hv_cpuid_get_host(cpuid, HV_CPUID_VERSION, R_EAX);
cpu->hyperv_version_id[0] = c->eax; cpu->hyperv_version_id[1] =
cpu->hyperv_version_id[1] = c->ebx; hv_cpuid_get_host(cpuid, HV_CPUID_VERSION, R_EBX);
cpu->hyperv_version_id[2] = c->ecx; cpu->hyperv_version_id[2] =
cpu->hyperv_version_id[3] = c->edx; hv_cpuid_get_host(cpuid, HV_CPUID_VERSION, R_ECX);
} cpu->hyperv_version_id[3] =
hv_cpuid_get_host(cpuid, HV_CPUID_VERSION, R_EDX);
c = cpuid_find_entry(cpuid, HV_CPUID_IMPLEMENT_LIMITS, 0); cpu->hv_max_vps = hv_cpuid_get_host(cpuid, HV_CPUID_IMPLEMENT_LIMITS,
if (c) { R_EAX);
cpu->hv_max_vps = c->eax; cpu->hyperv_limits[0] =
cpu->hyperv_limits[0] = c->ebx; hv_cpuid_get_host(cpuid, HV_CPUID_IMPLEMENT_LIMITS, R_EBX);
cpu->hyperv_limits[1] = c->ecx; cpu->hyperv_limits[1] =
cpu->hyperv_limits[2] = c->edx; hv_cpuid_get_host(cpuid, HV_CPUID_IMPLEMENT_LIMITS, R_ECX);
} cpu->hyperv_limits[2] =
hv_cpuid_get_host(cpuid, HV_CPUID_IMPLEMENT_LIMITS, R_EDX);
c = cpuid_find_entry(cpuid, HV_CPUID_ENLIGHTMENT_INFO, 0); cpu->hyperv_spinlock_attempts =
if (c) { hv_cpuid_get_host(cpuid, HV_CPUID_ENLIGHTMENT_INFO, R_EBX);
cpu->hyperv_spinlock_attempts = c->ebx;
}
} }
/* Features */ /* Features */
@ -1349,10 +1363,8 @@ static int hyperv_handle_properties(CPUState *cs,
if (cpu->hyperv_no_nonarch_cs == ON_OFF_AUTO_ON) { if (cpu->hyperv_no_nonarch_cs == ON_OFF_AUTO_ON) {
c->eax |= HV_NO_NONARCH_CORESHARING; c->eax |= HV_NO_NONARCH_CORESHARING;
} else if (cpu->hyperv_no_nonarch_cs == ON_OFF_AUTO_AUTO) { } else if (cpu->hyperv_no_nonarch_cs == ON_OFF_AUTO_AUTO) {
c2 = cpuid_find_entry(cpuid, HV_CPUID_ENLIGHTMENT_INFO, 0); c->eax |= hv_cpuid_get_host(cpuid, HV_CPUID_ENLIGHTMENT_INFO, R_EAX) &
if (c2) { HV_NO_NONARCH_CORESHARING;
c->eax |= c2->eax & HV_NO_NONARCH_CORESHARING;
}
} }
c = &cpuid_ent[cpuid_i++]; c = &cpuid_ent[cpuid_i++];