[Qemu-devel] [PATCH] KVM: Get all cpuid values from function 2

[Amit Shah <amit.shah@redhat.com>]

cpuid function 2 can have multiple values to describe cache behaviour.
Loop till we have fetched all the values.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
---
 qemu/target-i386/kvm.c |   27 +++++++++++++++++++++++++++
 1 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/qemu/target-i386/kvm.c b/qemu/target-i386/kvm.c
index a7ff14f..86745b1 100644
--- a/qemu/target-i386/kvm.c
+++ b/qemu/target-i386/kvm.c
@@ -51,6 +51,33 @@ int kvm_arch_init_vcpu(CPUState *env)
         struct kvm_cpuid_entry2 *c = &cpuid_data.entries[cpuid_i++];
 
         switch (i) {
+        case 2: {
+            /* Keep reading function 2 till all the input is received */
+            int times;
+
+            cpu_x86_cpuid(env, i, 0, &eax, &ebx, &ecx, &edx);
+            times = eax & 0xff;
+
+            c->function = i;
+            c->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC;
+            c->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT;
+            c->eax = eax;
+            c->ebx = ebx;
+            c->ecx = ecx;
+            c->edx = edx;
+
+            for (j = 1; j < times; ++j) {
+                cpu_x86_cpuid(env, i, 0, &eax, &ebx, &ecx, &edx);
+                c->function = i;
+                c->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC;
+                c->eax = eax;
+                c->ebx = ebx;
+                c->ecx = ecx;
+                c->edx = edx;
+                c = &cpuid_data.entries[++cpuid_i];
+            }
+            break;
+        }
         case 4:
         case 0xb:
         case 0xd:
-- 
1.6.0.6