[PATCH RFC v2 15/19] i386: switch hyperv_expand_features() to using error_setg()

[Vitaly Kuznetsov <vkuznets@redhat.com>]

Use standard error_setg() mechanism in hyperv_expand_features().

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
 target/i386/kvm.c | 101 ++++++++++++++++++++++++++++------------------
 1 file changed, 61 insertions(+), 40 deletions(-)

diff --git a/target/i386/kvm.c b/target/i386/kvm.c
index 181e034da701..32678154837f 100644
--- a/target/i386/kvm.c
+++ b/target/i386/kvm.c
@@ -1149,7 +1149,7 @@ static bool hyperv_feature_supported(CPUState *cs, int feature)
     return true;
 }
 
-static int hv_cpuid_check_and_set(CPUState *cs, int feature)
+static int hv_cpuid_check_and_set(CPUState *cs, int feature, Error **errp)
 {
     X86CPU *cpu = X86_CPU(cs);
     uint64_t deps;
@@ -1163,20 +1163,18 @@ static int hv_cpuid_check_and_set(CPUState *cs, int feature)
     while (deps) {
         dep_feat = ctz64(deps);
         if (!(hyperv_feat_enabled(cpu, dep_feat))) {
-                fprintf(stderr,
-                        "Hyper-V %s requires Hyper-V %s\n",
-                        kvm_hyperv_properties[feature].desc,
-                        kvm_hyperv_properties[dep_feat].desc);
-                return 1;
+            error_setg(errp, "Hyper-V %s requires Hyper-V %s",
+                       kvm_hyperv_properties[feature].desc,
+                       kvm_hyperv_properties[dep_feat].desc);
+            return 1;
         }
         deps &= ~(1ull << dep_feat);
     }
 
     if (!hyperv_feature_supported(cs, feature)) {
         if (hyperv_feat_enabled(cpu, feature)) {
-            fprintf(stderr,
-                    "Hyper-V %s is not supported by kernel\n",
-                    kvm_hyperv_properties[feature].desc);
+            error_setg(errp, "Hyper-V %s is not supported by kernel",
+                       kvm_hyperv_properties[feature].desc);
             return 1;
         } else {
             return 0;
@@ -1223,13 +1221,12 @@ static uint32_t hv_build_cpuid_leaf(CPUState *cs, uint32_t func, int reg)
  * of 'hv_passthrough' mode and fills the environment with all supported
  * Hyper-V features.
  */
-static int hyperv_expand_features(CPUState *cs)
+static void hyperv_expand_features(CPUState *cs, Error **errp)
 {
     X86CPU *cpu = X86_CPU(cs);
-    int r;
 
     if (!hyperv_enabled(cpu))
-        return 0;
+        return;
 
     if (cpu->hyperv_passthrough) {
         cpu->hyperv_vendor_id[0] =
@@ -1275,37 +1272,60 @@ static int hyperv_expand_features(CPUState *cs)
     }
 
     /* Features */
-    r = hv_cpuid_check_and_set(cs, HYPERV_FEAT_RELAXED);
-    r |= hv_cpuid_check_and_set(cs, HYPERV_FEAT_VAPIC);
-    r |= hv_cpuid_check_and_set(cs, HYPERV_FEAT_TIME);
-    r |= hv_cpuid_check_and_set(cs, HYPERV_FEAT_CRASH);
-    r |= hv_cpuid_check_and_set(cs, HYPERV_FEAT_RESET);
-    r |= hv_cpuid_check_and_set(cs, HYPERV_FEAT_VPINDEX);
-    r |= hv_cpuid_check_and_set(cs, HYPERV_FEAT_RUNTIME);
-    r |= hv_cpuid_check_and_set(cs, HYPERV_FEAT_SYNIC);
-    r |= hv_cpuid_check_and_set(cs, HYPERV_FEAT_STIMER);
-    r |= hv_cpuid_check_and_set(cs, HYPERV_FEAT_FREQUENCIES);
-    r |= hv_cpuid_check_and_set(cs, HYPERV_FEAT_REENLIGHTENMENT);
-    r |= hv_cpuid_check_and_set(cs, HYPERV_FEAT_TLBFLUSH);
-    r |= hv_cpuid_check_and_set(cs, HYPERV_FEAT_EVMCS);
-    r |= hv_cpuid_check_and_set(cs, HYPERV_FEAT_IPI);
-    r |= hv_cpuid_check_and_set(cs, HYPERV_FEAT_STIMER_DIRECT);
+    if (hv_cpuid_check_and_set(cs, HYPERV_FEAT_RELAXED, errp)) {
+        return;
+    }
+    if (hv_cpuid_check_and_set(cs, HYPERV_FEAT_VAPIC, errp)) {
+        return;
+    }
+    if (hv_cpuid_check_and_set(cs, HYPERV_FEAT_TIME, errp)) {
+        return;
+    }
+    if (hv_cpuid_check_and_set(cs, HYPERV_FEAT_CRASH, errp)) {
+        return;
+    }
+    if (hv_cpuid_check_and_set(cs, HYPERV_FEAT_RESET, errp)) {
+        return;
+    }
+    if (hv_cpuid_check_and_set(cs, HYPERV_FEAT_VPINDEX, errp)) {
+        return;
+    }
+    if (hv_cpuid_check_and_set(cs, HYPERV_FEAT_RUNTIME, errp)) {
+        return;
+    }
+    if (hv_cpuid_check_and_set(cs, HYPERV_FEAT_SYNIC, errp)) {
+        return;
+    }
+    if (hv_cpuid_check_and_set(cs, HYPERV_FEAT_STIMER, errp)) {
+        return;
+    }
+    if (hv_cpuid_check_and_set(cs, HYPERV_FEAT_FREQUENCIES, errp)) {
+        return;
+    }
+    if (hv_cpuid_check_and_set(cs, HYPERV_FEAT_REENLIGHTENMENT, errp)) {
+        return;
+    }
+    if (hv_cpuid_check_and_set(cs, HYPERV_FEAT_TLBFLUSH, errp)) {
+        return;
+    }
+    if (hv_cpuid_check_and_set(cs, HYPERV_FEAT_EVMCS, errp)) {
+        return;
+    }
+    if (hv_cpuid_check_and_set(cs, HYPERV_FEAT_IPI, errp)) {
+        return;
+    }
+    if (hv_cpuid_check_and_set(cs, HYPERV_FEAT_STIMER_DIRECT, errp)) {
+        return;
+    }
 
     /* Additional dependencies not covered by kvm_hyperv_properties[] */
     if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNIC) &&
         !cpu->hyperv_synic_kvm_only &&
         !hyperv_feat_enabled(cpu, HYPERV_FEAT_VPINDEX)) {
-        fprintf(stderr, "Hyper-V %s requires Hyper-V %s\n",
-                kvm_hyperv_properties[HYPERV_FEAT_SYNIC].desc,
-                kvm_hyperv_properties[HYPERV_FEAT_VPINDEX].desc);
-        r |= 1;
-    }
-
-    if (r) {
-        return -ENOSYS;
+        error_setg(errp, "Hyper-V %s requires Hyper-V %s",
+                   kvm_hyperv_properties[HYPERV_FEAT_SYNIC].desc,
+                   kvm_hyperv_properties[HYPERV_FEAT_VPINDEX].desc);
     }
-
-    return 0;
 }
 
 /*
@@ -1540,9 +1560,10 @@ int kvm_arch_init_vcpu(CPUState *cs)
     env->apic_bus_freq = KVM_APIC_BUS_FREQUENCY;
 
     /* Paravirtualization CPUIDs */
-    r = hyperv_expand_features(cs);
-    if (r < 0) {
-        return r;
+    hyperv_expand_features(cs, &local_err);
+    if (local_err) {
+        error_report_err(local_err);
+        return -ENOSYS;
     }
 
     if (hyperv_enabled(cpu)) {
-- 
2.25.4