[libvirt] [PATCH v2 1/3] i386: host_vendor_fms() helper function
Helper function for code that needs to check the host CPU
vendor/family/model/stepping values.
Signed-off-by: Eduardo Habkost <ehabkost(a)redhat.com>
---
Changes v1 -> v2:
* Coding style fix (split long lines)
---
target/i386/cpu.h | 1 +
target/i386/cpu.c | 29 +++++++++++++++++++++--------
2 files changed, 22 insertions(+), 8 deletions(-)
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 5f75ab1b15..647435a1d9 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -1431,6 +1431,7 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t
count,
void cpu_clear_apic_feature(CPUX86State *env);
void host_cpuid(uint32_t function, uint32_t count,
uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx);
+void host_vendor_fms(char *vendor, int *family, int *model, int *stepping);
/* helper.c */
int x86_cpu_handle_mmu_fault(CPUState *cpu, vaddr addr,
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 7a04e6ff34..a8e4f37e27 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -682,6 +682,25 @@ void host_cpuid(uint32_t function, uint32_t count,
*edx = vec[3];
}
+void host_vendor_fms(char *vendor, int *family, int *model, int *stepping)
+{
+ uint32_t eax, ebx, ecx, edx;
+
+ host_cpuid(0x0, 0, &eax, &ebx, &ecx, &edx);
+ x86_cpu_vendor_words2str(vendor, ebx, edx, ecx);
+
+ host_cpuid(0x1, 0, &eax, &ebx, &ecx, &edx);
+ if (family) {
+ *family = ((eax >> 8) & 0x0F) + ((eax >> 20) & 0xFF);
+ }
+ if (model) {
+ *model = ((eax >> 4) & 0x0F) | ((eax & 0xF0000) >> 12);
+ }
+ if (stepping) {
+ *stepping = eax & 0x0F;
+ }
+}
+
/* CPU class name definitions: */
#define X86_CPU_TYPE_SUFFIX "-" TYPE_X86_CPU
@@ -1547,18 +1566,12 @@ static void host_x86_cpu_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
X86CPUClass *xcc = X86_CPU_CLASS(oc);
- uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
xcc->kvm_required = true;
xcc->ordering = 9;
- host_cpuid(0x0, 0, &eax, &ebx, &ecx, &edx);
- x86_cpu_vendor_words2str(host_cpudef.vendor, ebx, edx, ecx);
-
- host_cpuid(0x1, 0, &eax, &ebx, &ecx, &edx);
- host_cpudef.family = ((eax >> 8) & 0x0F) + ((eax >> 20) & 0xFF);
- host_cpudef.model = ((eax >> 4) & 0x0F) | ((eax & 0xF0000) >>
12);
- host_cpudef.stepping = eax & 0x0F;
+ host_vendor_fms(host_cpudef.vendor, &host_cpudef.family,
+ &host_cpudef.model, &host_cpudef.stepping);
cpu_x86_fill_model_id(host_cpudef.model_id);
--
2.11.0.259.g40922b1