Helper function for code that needs to check the host CPU
vendor/family/model/stepping values.
Signed-off-by: Eduardo Habkost <ehabkost@xxxxxxxxxx>
---
Changes v2 -> v3:
* Don't touch max_x86_cpu_initfn() to reduce risk post
hard freeze
Changes v1 -> v2:
* Coding style fix (split long lines)
---
target/i386/cpu.h | 1 +
target/i386/cpu.c | 19 +++++++++++++++++++
2 files changed, 20 insertions(+)
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index ac2ad6d443..385dcc8fea 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -1436,6 +1436,7 @@ 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 fba92125ab..30ba1bd06b 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -688,6 +688,25 @@ 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
--
2.11.0.259.g40922b1
--
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