PPC: KVM: suppress warnings about not supported SPRs

PR KVM lacks support of many SPRs in set/get one register API but it does
really break PR KVM. So convert them to switchable traces for now.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>

target-ppc/kvm.c

@@ -36,6 +36,7 @@
 #include "hw/ppc/spapr.h"
 #include "hw/ppc/spapr_vio.h"
 #include "sysemu/watchdog.h"
+#include "trace.h"
 
 //#define DEBUG_KVM
 
@@ -480,8 +481,7 @@ static void kvm_get_one_spr(CPUState *cs, uint64_t id, int spr)
 
     ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &reg);
     if (ret != 0) {
-        fprintf(stderr, "Warning: Unable to retrieve SPR %d from KVM: %s\n",
-                spr, strerror(errno));
+        trace_kvm_failed_spr_get(spr, strerror(errno));
     } else {
         switch (id & KVM_REG_SIZE_MASK) {
         case KVM_REG_SIZE_U32:
@@ -529,8 +529,7 @@ static void kvm_put_one_spr(CPUState *cs, uint64_t id, int spr)
 
     ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &reg);
     if (ret != 0) {
-        fprintf(stderr, "Warning: Unable to set SPR %d to KVM: %s\n",
-                spr, strerror(errno));
+        trace_kvm_failed_spr_set(spr, strerror(errno));
     }
 }
 

trace-events

@@ -1176,6 +1176,8 @@ kvm_vm_ioctl(int type, void *arg) "type 0x%x, arg %p"
 kvm_vcpu_ioctl(int cpu_index, int type, void *arg) "cpu_index %d, type 0x%x, arg %p"
 kvm_run_exit(int cpu_index, uint32_t reason) "cpu_index %d, reason %d"
 kvm_device_ioctl(int fd, int type, void *arg) "dev fd %d, type 0x%x, arg %p"
+kvm_failed_spr_set(int str, const char *msg) "Warning: Unable to set SPR %d to KVM: %s"
+kvm_failed_spr_get(int str, const char *msg) "Warning: Unable to retrieve SPR %d from KVM: %s"
 
 # memory.c
 memory_region_ops_read(void *mr, uint64_t addr, uint64_t value, unsigned size) "mr %p addr %#"PRIx64" value %#"PRIx64" size %u"