tcg: simplify !CONFIG_TCG handling of tb_invalidate_*

There is no need for a stub, since tb_invalidate_phys_addr can be excised
altogether when TCG is disabled.  This is a bit cleaner since it avoids
using code that is clearly specific to user-mode emulation (it calls
mmap_lock/unlock) for the !CONFIG_TCG case.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

accel/stubs/tcg-stub.c

@@ -16,7 +16,6 @@
 #include "tcg/tcg.h"
 #include "exec/cpu-common.h"
 #include "exec/exec-all.h"
-#include "translate-all.h"
 
 void tb_flush(CPUState *cpu)
 {
@@ -25,8 +24,3 @@ void tb_flush(CPUState *cpu)
 void tlb_set_dirty(CPUState *cpu, target_ulong vaddr)
 {
 }
-
-void tb_invalidate_phys_page_range(tb_page_addr_t start, tb_page_addr_t end,
-                                   int is_cpu_write_access)
-{
-}

exec.c

@@ -1027,7 +1027,7 @@ const char *parse_cpu_model(const char *cpu_model)
     return cpu_type;
 }
 
-#if defined(CONFIG_USER_ONLY) || !defined(CONFIG_TCG)
+#if defined(CONFIG_USER_ONLY)
 void tb_invalidate_phys_addr(target_ulong addr)
 {
     mmap_lock();
@@ -1046,6 +1046,10 @@ void tb_invalidate_phys_addr(AddressSpace *as, hwaddr addr, MemTxAttrs attrs)
     MemoryRegion *mr;
     hwaddr l = 1;
 
+    if (!tcg_enabled()) {
+        return;
+    }
+
     rcu_read_lock();
     mr = address_space_translate(as, addr, &addr, &l, false, attrs);
     if (!(memory_region_is_ram(mr)

include/exec/exec-all.h

@@ -412,13 +412,11 @@ static inline uint32_t curr_cflags(void)
 }
 
 /* TranslationBlock invalidate API */
-#if !defined(CONFIG_USER_ONLY) && defined(CONFIG_TCG)
-void tb_invalidate_phys_addr(AddressSpace *as, hwaddr addr, MemTxAttrs attrs);
-#else
-void tb_invalidate_phys_addr(target_ulong addr);
-#endif
 #if defined(CONFIG_USER_ONLY)
+void tb_invalidate_phys_addr(target_ulong addr);
 void tb_invalidate_phys_range(target_ulong start, target_ulong end);
+#else
+void tb_invalidate_phys_addr(AddressSpace *as, hwaddr addr, MemTxAttrs attrs);
 #endif
 void tb_flush(CPUState *cpu);
 void tb_phys_invalidate(TranslationBlock *tb, tb_page_addr_t page_addr);