[Qemu-devel] [PATCH v2 2/4] i386/kvm: set tsc_khz before configuring Hyper-V CPUID

[Ladi Prosek]

Timing-related Hyper-V enlightenments will benefit from knowing the final
tsc_khz value. This commit just moves the code in preparation for further
changes.

Signed-off-by: Ladi Prosek <address@hidden>
---
 target/i386/kvm.c | 38 +++++++++++++++++++-------------------
 1 file changed, 19 insertions(+), 19 deletions(-)

diff --git a/target/i386/kvm.c b/target/i386/kvm.c
index b14a0db..15d56ae 100644
--- a/target/i386/kvm.c
+++ b/target/i386/kvm.c
@@ -695,6 +695,25 @@ int kvm_arch_init_vcpu(CPUState *cs)
 
     cpuid_i = 0;
 
+    r = kvm_arch_set_tsc_khz(cs);
+    if (r < 0) {
+        goto fail;
+    }
+
+    /* vcpu's TSC frequency is either specified by user, or following
+     * the value used by KVM if the former is not present. In the
+     * latter case, we query it from KVM and record in env->tsc_khz,
+     * so that vcpu's TSC frequency can be migrated later via this field.
+     */
+    if (!env->tsc_khz) {
+        r = kvm_check_extension(cs->kvm_state, KVM_CAP_GET_TSC_KHZ) ?
+            kvm_vcpu_ioctl(cs, KVM_GET_TSC_KHZ) :
+            -ENOTSUP;
+        if (r > 0) {
+            env->tsc_khz = r;
+        }
+    }
+
     /* Paravirtualization CPUIDs */
     if (hyperv_enabled(cpu)) {
         c = &cpuid_data.entries[cpuid_i++];
@@ -961,25 +980,6 @@ int kvm_arch_init_vcpu(CPUState *cs)
         }
     }
 
-    r = kvm_arch_set_tsc_khz(cs);
-    if (r < 0) {
-        goto fail;
-    }
-
-    /* vcpu's TSC frequency is either specified by user, or following
-     * the value used by KVM if the former is not present. In the
-     * latter case, we query it from KVM and record in env->tsc_khz,
-     * so that vcpu's TSC frequency can be migrated later via this field.
-     */
-    if (!env->tsc_khz) {
-        r = kvm_check_extension(cs->kvm_state, KVM_CAP_GET_TSC_KHZ) ?
-            kvm_vcpu_ioctl(cs, KVM_GET_TSC_KHZ) :
-            -ENOTSUP;
-        if (r > 0) {
-            env->tsc_khz = r;
-        }
-    }
-
     if (cpu->vmware_cpuid_freq
         /* Guests depend on 0x40000000 to detect this feature, so only expose
          * it if KVM exposes leaf 0x40000000. (Conflicts with Hyper-V) */
-- 
2.9.3