target/ppc: make power8-pmu.c CONFIG_TCG only

This is an exclusive TCG helper. Gating it with CONFIG_TCG and changing
meson.build accordingly will prevent problems --disable-tcg and
--disable-linux-user later on.

We're also changing the uses of !kvm_enabled() to tcg_enabled() to avoid
adding "defined(CONFIG_TCG)" ifdefs, since tcg_enabled() will be
defaulted to false with --disable-tcg and the block will always be
skipped.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220225101140.1054160-2-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>

target/ppc/cpu_init.c

@@ -5698,12 +5698,10 @@ static void register_power9_mmu_sprs(CPUPPCState *env)
  */
 static void init_tcg_pmu_power8(CPUPPCState *env)
 {
-#if defined(TARGET_PPC64) && !defined(CONFIG_USER_ONLY)
     /* Init PMU overflow timers */
-    if (!kvm_enabled()) {
+    if (tcg_enabled()) {
         cpu_ppc_pmu_init(env);
     }
-#endif
 }
 
 static void init_proc_book3s_common(CPUPPCState *env)
@@ -7167,14 +7165,14 @@ static void ppc_cpu_reset(DeviceState *dev)
 
 #if !defined(CONFIG_USER_ONLY)
     env->nip = env->hreset_vector | env->excp_prefix;
-#if defined(CONFIG_TCG)
-    if (env->mmu_model != POWERPC_MMU_REAL) {
-        ppc_tlb_invalidate_all(env);
+
+    if (tcg_enabled()) {
+        if (env->mmu_model != POWERPC_MMU_REAL) {
+            ppc_tlb_invalidate_all(env);
+        }
+        pmu_update_summaries(env);
     }
-#endif /* CONFIG_TCG */
 #endif
-
-    pmu_update_summaries(env);
     hreg_compute_hflags(env);
     env->reserve_addr = (target_ulong)-1ULL;
     /* Be sure no exception or interrupt is pending */

target/ppc/machine.c

@@ -2,6 +2,7 @@
 #include "cpu.h"
 #include "exec/exec-all.h"
 #include "sysemu/kvm.h"
+#include "sysemu/tcg.h"
 #include "helper_regs.h"
 #include "mmu-hash64.h"
 #include "migration/cpu.h"
@@ -20,7 +21,10 @@ static void post_load_update_msr(CPUPPCState *env)
      */
     env->msr ^= env->msr_mask & ~((1ULL << MSR_TGPR) | MSR_HVB);
     ppc_store_msr(env, msr);
-    pmu_update_summaries(env);
+
+    if (tcg_enabled()) {
+        pmu_update_summaries(env);
+    }
 }
 
 static int get_avr(QEMUFile *f, void *pv, size_t size,

target/ppc/meson.build

@@ -16,6 +16,7 @@ ppc_ss.add(when: 'CONFIG_TCG', if_true: files(
   'misc_helper.c',
   'timebase_helper.c',
   'translate.c',
+  'power8-pmu.c',
 ))
 
 ppc_ss.add(libdecnumber)
@@ -51,7 +52,6 @@ ppc_softmmu_ss.add(when: 'TARGET_PPC64', if_true: files(
   'mmu-book3s-v3.c',
   'mmu-hash64.c',
   'mmu-radix64.c',
-  'power8-pmu.c',
 ))
 
 target_arch += {'ppc': ppc_ss}

target/ppc/power8-pmu.h

@@ -13,11 +13,11 @@
 #ifndef POWER8_PMU
 #define POWER8_PMU
 
-void cpu_ppc_pmu_init(CPUPPCState *env);
-
 #if defined(TARGET_PPC64) && !defined(CONFIG_USER_ONLY)
+void cpu_ppc_pmu_init(CPUPPCState *env);
 void pmu_update_summaries(CPUPPCState *env);
 #else
+static inline void cpu_ppc_pmu_init(CPUPPCState *env) { }
 static inline void pmu_update_summaries(CPUPPCState *env) { }
 #endif