[PULL 40/46] physmem: make watchpoint checking code TCG-only

[Richard Henderson <richard.henderson@linaro.org>]

From: Claudio Fontana <cfontana@suse.de>

cpu_check_watchpoint, watchpoint_address_matches are TCG-only.

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210204163931.7358-13-cfontana@suse.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 softmmu/physmem.c | 141 +++++++++++++++++++++++-----------------------
 1 file changed, 72 insertions(+), 69 deletions(-)

diff --git a/softmmu/physmem.c b/softmmu/physmem.c
index 60760a3bdc..51ed600bf9 100644
--- a/softmmu/physmem.c
+++ b/softmmu/physmem.c
@@ -840,6 +840,7 @@ void cpu_watchpoint_remove_all(CPUState *cpu, int mask)
     }
 }
 
+#ifdef CONFIG_TCG
 /* Return true if this watchpoint address matches the specified
  * access (ie the address range covered by the watchpoint overlaps
  * partially or completely with the address range covered by the
@@ -873,6 +874,77 @@ int cpu_watchpoint_address_matches(CPUState *cpu, vaddr addr, vaddr len)
     return ret;
 }
 
+/* Generate a debug exception if a watchpoint has been hit.  */
+void cpu_check_watchpoint(CPUState *cpu, vaddr addr, vaddr len,
+                          MemTxAttrs attrs, int flags, uintptr_t ra)
+{
+    CPUClass *cc = CPU_GET_CLASS(cpu);
+    CPUWatchpoint *wp;
+
+    assert(tcg_enabled());
+    if (cpu->watchpoint_hit) {
+        /*
+         * We re-entered the check after replacing the TB.
+         * Now raise the debug interrupt so that it will
+         * trigger after the current instruction.
+         */
+        qemu_mutex_lock_iothread();
+        cpu_interrupt(cpu, CPU_INTERRUPT_DEBUG);
+        qemu_mutex_unlock_iothread();
+        return;
+    }
+
+    addr = cc->adjust_watchpoint_address(cpu, addr, len);
+    QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) {
+        if (watchpoint_address_matches(wp, addr, len)
+            && (wp->flags & flags)) {
+            if (replay_running_debug()) {
+                /*
+                 * Don't process the watchpoints when we are
+                 * in a reverse debugging operation.
+                 */
+                replay_breakpoint();
+                return;
+            }
+            if (flags == BP_MEM_READ) {
+                wp->flags |= BP_WATCHPOINT_HIT_READ;
+            } else {
+                wp->flags |= BP_WATCHPOINT_HIT_WRITE;
+            }
+            wp->hitaddr = MAX(addr, wp->vaddr);
+            wp->hitattrs = attrs;
+            if (!cpu->watchpoint_hit) {
+                if (wp->flags & BP_CPU &&
+                    !cc->debug_check_watchpoint(cpu, wp)) {
+                    wp->flags &= ~BP_WATCHPOINT_HIT;
+                    continue;
+                }
+                cpu->watchpoint_hit = wp;
+
+                mmap_lock();
+                tb_check_watchpoint(cpu, ra);
+                if (wp->flags & BP_STOP_BEFORE_ACCESS) {
+                    cpu->exception_index = EXCP_DEBUG;
+                    mmap_unlock();
+                    cpu_loop_exit_restore(cpu, ra);
+                } else {
+                    /* Force execution of one insn next time.  */
+                    cpu->cflags_next_tb = 1 | curr_cflags();
+                    mmap_unlock();
+                    if (ra) {
+                        cpu_restore_state(cpu, ra, true);
+                    }
+                    cpu_loop_exit_noexc(cpu);
+                }
+            }
+        } else {
+            wp->flags &= ~BP_WATCHPOINT_HIT;
+        }
+    }
+}
+
+#endif /* CONFIG_TCG */
+
 /* Called from RCU critical section */
 static RAMBlock *qemu_get_ram_block(ram_addr_t addr)
 {
@@ -2359,75 +2431,6 @@ ram_addr_t qemu_ram_addr_from_host(void *ptr)
     return block->offset + offset;
 }
 
-/* Generate a debug exception if a watchpoint has been hit.  */
-void cpu_check_watchpoint(CPUState *cpu, vaddr addr, vaddr len,
-                          MemTxAttrs attrs, int flags, uintptr_t ra)
-{
-    CPUClass *cc = CPU_GET_CLASS(cpu);
-    CPUWatchpoint *wp;
-
-    assert(tcg_enabled());
-    if (cpu->watchpoint_hit) {
-        /*
-         * We re-entered the check after replacing the TB.
-         * Now raise the debug interrupt so that it will
-         * trigger after the current instruction.
-         */
-        qemu_mutex_lock_iothread();
-        cpu_interrupt(cpu, CPU_INTERRUPT_DEBUG);
-        qemu_mutex_unlock_iothread();
-        return;
-    }
-
-    addr = cc->adjust_watchpoint_address(cpu, addr, len);
-    QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) {
-        if (watchpoint_address_matches(wp, addr, len)
-            && (wp->flags & flags)) {
-            if (replay_running_debug()) {
-                /*
-                 * Don't process the watchpoints when we are
-                 * in a reverse debugging operation.
-                 */
-                replay_breakpoint();
-                return;
-            }
-            if (flags == BP_MEM_READ) {
-                wp->flags |= BP_WATCHPOINT_HIT_READ;
-            } else {
-                wp->flags |= BP_WATCHPOINT_HIT_WRITE;
-            }
-            wp->hitaddr = MAX(addr, wp->vaddr);
-            wp->hitattrs = attrs;
-            if (!cpu->watchpoint_hit) {
-                if (wp->flags & BP_CPU &&
-                    !cc->debug_check_watchpoint(cpu, wp)) {
-                    wp->flags &= ~BP_WATCHPOINT_HIT;
-                    continue;
-                }
-                cpu->watchpoint_hit = wp;
-
-                mmap_lock();
-                tb_check_watchpoint(cpu, ra);
-                if (wp->flags & BP_STOP_BEFORE_ACCESS) {
-                    cpu->exception_index = EXCP_DEBUG;
-                    mmap_unlock();
-                    cpu_loop_exit_restore(cpu, ra);
-                } else {
-                    /* Force execution of one insn next time.  */
-                    cpu->cflags_next_tb = 1 | curr_cflags();
-                    mmap_unlock();
-                    if (ra) {
-                        cpu_restore_state(cpu, ra, true);
-                    }
-                    cpu_loop_exit_noexc(cpu);
-                }
-            }
-        } else {
-            wp->flags &= ~BP_WATCHPOINT_HIT;
-        }
-    }
-}
-
 static MemTxResult flatview_read(FlatView *fv, hwaddr addr,
                                  MemTxAttrs attrs, void *buf, hwaddr len);
 static MemTxResult flatview_write(FlatView *fv, hwaddr addr, MemTxAttrs attrs,
-- 
2.25.1