[PATCH v2 8/9] use kvm_upstream sw_breakpoints structure

[Glauber Costa <glommer@redhat.com>]

Signed-off-by: Glauber Costa <glommer@redhat.com>
---
 qemu-kvm-x86.c |    4 ++--
 qemu-kvm.c     |   27 ++++++++++++++++++---------
 qemu-kvm.h     |    9 ++++++---
 3 files changed, 26 insertions(+), 14 deletions(-)

diff --git a/qemu-kvm-x86.c b/qemu-kvm-x86.c
index 48b2e2f..f3890fe 100644
--- a/qemu-kvm-x86.c
+++ b/qemu-kvm-x86.c
@@ -1481,7 +1481,7 @@ int kvm_arch_debug(struct kvm_debug_exit_arch *arch_info)
 			break;
 		    }
 	}
-    } else if (kvm_find_sw_breakpoint(arch_info->pc))
+    } else if (kvm_find_sw_breakpoint(cpu_single_env, arch_info->pc))
 	handle = 1;
 
     if (!handle)
@@ -1504,7 +1504,7 @@ void kvm_arch_update_guest_debug(CPUState *env, struct kvm_guest_debug *dbg)
     };
     int n;
 
-    if (!TAILQ_EMPTY(&kvm_sw_breakpoints))
+    if (kvm_sw_breakpoints_active(env))
 	dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP;
 
     if (nb_hw_breakpoint > 0) {
diff --git a/qemu-kvm.c b/qemu-kvm.c
index beee038..490024e 100644
--- a/qemu-kvm.c
+++ b/qemu-kvm.c
@@ -459,6 +459,10 @@ int kvm_init(int smp_cpus)
 	kvm_context->no_irqchip_creation = 0;
 	kvm_context->no_pit_creation = 0;
 
+#ifdef KVM_CAP_SET_GUEST_DEBUG
+    TAILQ_INIT(&kvm_state->kvm_sw_breakpoints);
+#endif
+
 	gsi_count = kvm_get_gsi_count(kvm_context);
 	if (gsi_count > 0) {
 		int gsi_bits, i;
@@ -2419,14 +2423,13 @@ int kvm_qemu_init_env(CPUState *cenv)
 }
 
 #ifdef KVM_CAP_SET_GUEST_DEBUG
-struct kvm_sw_breakpoint_head kvm_sw_breakpoints =
-    TAILQ_HEAD_INITIALIZER(kvm_sw_breakpoints);
 
-struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(target_ulong pc)
+struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *env,
+                                                 target_ulong pc)
 {
     struct kvm_sw_breakpoint *bp;
 
-    TAILQ_FOREACH(bp, &kvm_sw_breakpoints, entry) {
+    TAILQ_FOREACH(bp, &env->kvm_state->kvm_sw_breakpoints, entry) {
 	if (bp->pc == pc)
 	    return bp;
     }
@@ -2461,6 +2464,11 @@ int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap)
     return data.err;
 }
 
+int kvm_sw_breakpoints_active(CPUState *env)
+{
+    return !TAILQ_EMPTY(&env->kvm_state->kvm_sw_breakpoints);
+}
+
 int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
                           target_ulong len, int type)
 {
@@ -2469,7 +2477,7 @@ int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
     int err;
 
     if (type == GDB_BREAKPOINT_SW) {
-	bp = kvm_find_sw_breakpoint(addr);
+	bp = kvm_find_sw_breakpoint(current_env, addr);
 	if (bp) {
 	    bp->use_count++;
 	    return 0;
@@ -2487,7 +2495,8 @@ int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
 	    return err;
 	}
 
-	TAILQ_INSERT_HEAD(&kvm_sw_breakpoints, bp, entry);
+    TAILQ_INSERT_HEAD(&current_env->kvm_state->kvm_sw_breakpoints,
+                      bp, entry);
     } else {
 	err = kvm_arch_insert_hw_breakpoint(addr, len, type);
 	if (err)
@@ -2510,7 +2519,7 @@ int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
     int err;
 
     if (type == GDB_BREAKPOINT_SW) {
-	bp = kvm_find_sw_breakpoint(addr);
+	bp = kvm_find_sw_breakpoint(current_env, addr);
 	if (!bp)
 	    return -ENOENT;
 
@@ -2523,7 +2532,7 @@ int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
 	if (err)
 	    return err;
 
-	TAILQ_REMOVE(&kvm_sw_breakpoints, bp, entry);
+	TAILQ_REMOVE(&current_env->kvm_state->kvm_sw_breakpoints, bp, entry);
 	qemu_free(bp);
     } else {
 	err = kvm_arch_remove_hw_breakpoint(addr, len, type);
@@ -2544,7 +2553,7 @@ void kvm_remove_all_breakpoints(CPUState *current_env)
     struct kvm_sw_breakpoint *bp, *next;
     CPUState *env;
 
-    TAILQ_FOREACH_SAFE(bp, &kvm_sw_breakpoints, entry, next) {
+    TAILQ_FOREACH_SAFE(bp, &current_env->kvm_state->kvm_sw_breakpoints, entry, next) {
         if (kvm_arch_remove_sw_breakpoint(current_env, bp) != 0) {
             /* Try harder to find a CPU that currently sees the breakpoint. */
             for (env = first_cpu; env != NULL; env = env->next_cpu) {
diff --git a/qemu-kvm.h b/qemu-kvm.h
index 9d10cf6..b2c5c54 100644
--- a/qemu-kvm.h
+++ b/qemu-kvm.h
@@ -971,12 +971,12 @@ struct kvm_sw_breakpoint {
     int use_count;
     TAILQ_ENTRY(kvm_sw_breakpoint) entry;
 };
-TAILQ_HEAD(kvm_sw_breakpoint_head, kvm_sw_breakpoint);
 
-extern struct kvm_sw_breakpoint_head kvm_sw_breakpoints;
+TAILQ_HEAD(kvm_sw_breakpoint_head, kvm_sw_breakpoint);
 
 int kvm_arch_debug(struct kvm_debug_exit_arch *arch_info);
-struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(target_ulong pc);
+int kvm_sw_breakpoints_active(CPUState *env);
+struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *env, target_ulong pc);
 int kvm_arch_insert_sw_breakpoint(CPUState *current_env,
                                   struct kvm_sw_breakpoint *bp);
 int kvm_arch_remove_sw_breakpoint(CPUState *current_env,
@@ -1133,6 +1133,9 @@ typedef struct KVMState
     int coalesced_mmio;
     int broken_set_mem_region;
     int migration_log;
+#ifdef KVM_CAP_SET_GUEST_DEBUG
+    struct kvm_sw_breakpoint_head kvm_sw_breakpoints;
+#endif
     struct kvm_context kvm_context;
 } KVMState;
 
-- 
1.6.2.2