[Qemu-devel] [PATCH qom-cpu v3 01/14] kvm: Free current_cpu identifier

["Andreas Färber" <afaerber@suse.de>]

Since CPU loops are done as last step in kvm_{insert,remove}_breakpoint()
and kvm_remove_all_breakpoints(), we do not need to distinguish between
invoking CPU and iterated CPUs and can thereby free the identifier for
use as a global variable.

Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
---
 include/sysemu/kvm.h | 10 +++++-----
 kvm-all.c            | 39 +++++++++++++++++----------------------
 kvm-stub.c           |  6 +++---
 3 files changed, 25 insertions(+), 30 deletions(-)

diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index fe8bc40..c88aee9 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -159,11 +159,11 @@ void *kvm_arch_ram_alloc(ram_addr_t size);
 void kvm_setup_guest_memory(void *start, size_t size);
 void kvm_flush_coalesced_mmio_buffer(void);
 
-int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr,
+int kvm_insert_breakpoint(CPUArchState *env, target_ulong addr,
                           target_ulong len, int type);
-int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr,
+int kvm_remove_breakpoint(CPUArchState *env, target_ulong addr,
                           target_ulong len, int type);
-void kvm_remove_all_breakpoints(CPUArchState *current_env);
+void kvm_remove_all_breakpoints(CPUArchState *env);
 int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap);
 #ifndef _WIN32
 int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset);
@@ -241,9 +241,9 @@ struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu,
 
 int kvm_sw_breakpoints_active(CPUState *cpu);
 
-int kvm_arch_insert_sw_breakpoint(CPUState *current_cpu,
+int kvm_arch_insert_sw_breakpoint(CPUState *cpu,
                                   struct kvm_sw_breakpoint *bp);
-int kvm_arch_remove_sw_breakpoint(CPUState *current_cpu,
+int kvm_arch_remove_sw_breakpoint(CPUState *cpu,
                                   struct kvm_sw_breakpoint *bp);
 int kvm_arch_insert_hw_breakpoint(target_ulong addr,
                                   target_ulong len, int type);
diff --git a/kvm-all.c b/kvm-all.c
index 7a1684e..d074597 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -1896,16 +1896,15 @@ int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap)
     return data.err;
 }
 
-int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr,
+int kvm_insert_breakpoint(CPUArchState *env, target_ulong addr,
                           target_ulong len, int type)
 {
-    CPUState *current_cpu = ENV_GET_CPU(current_env);
+    CPUState *cpu = ENV_GET_CPU(env);
     struct kvm_sw_breakpoint *bp;
-    CPUArchState *env;
     int err;
 
     if (type == GDB_BREAKPOINT_SW) {
-        bp = kvm_find_sw_breakpoint(current_cpu, addr);
+        bp = kvm_find_sw_breakpoint(cpu, addr);
         if (bp) {
             bp->use_count++;
             return 0;
@@ -1918,14 +1917,13 @@ int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr,
 
         bp->pc = addr;
         bp->use_count = 1;
-        err = kvm_arch_insert_sw_breakpoint(current_cpu, bp);
+        err = kvm_arch_insert_sw_breakpoint(cpu, bp);
         if (err) {
             g_free(bp);
             return err;
         }
 
-        QTAILQ_INSERT_HEAD(&current_cpu->kvm_state->kvm_sw_breakpoints,
-                          bp, entry);
+        QTAILQ_INSERT_HEAD(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry);
     } else {
         err = kvm_arch_insert_hw_breakpoint(addr, len, type);
         if (err) {
@@ -1942,16 +1940,15 @@ int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr,
     return 0;
 }
 
-int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr,
+int kvm_remove_breakpoint(CPUArchState *env, target_ulong addr,
                           target_ulong len, int type)
 {
-    CPUState *current_cpu = ENV_GET_CPU(current_env);
+    CPUState *cpu = ENV_GET_CPU(env);
     struct kvm_sw_breakpoint *bp;
-    CPUArchState *env;
     int err;
 
     if (type == GDB_BREAKPOINT_SW) {
-        bp = kvm_find_sw_breakpoint(current_cpu, addr);
+        bp = kvm_find_sw_breakpoint(cpu, addr);
         if (!bp) {
             return -ENOENT;
         }
@@ -1961,12 +1958,12 @@ int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr,
             return 0;
         }
 
-        err = kvm_arch_remove_sw_breakpoint(current_cpu, bp);
+        err = kvm_arch_remove_sw_breakpoint(cpu, bp);
         if (err) {
             return err;
         }
 
-        QTAILQ_REMOVE(&current_cpu->kvm_state->kvm_sw_breakpoints, bp, entry);
+        QTAILQ_REMOVE(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry);
         g_free(bp);
     } else {
         err = kvm_arch_remove_hw_breakpoint(addr, len, type);
@@ -1984,16 +1981,14 @@ int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr,
     return 0;
 }
 
-void kvm_remove_all_breakpoints(CPUArchState *current_env)
+void kvm_remove_all_breakpoints(CPUArchState *env)
 {
-    CPUState *current_cpu = ENV_GET_CPU(current_env);
+    CPUState *cpu = ENV_GET_CPU(env);
     struct kvm_sw_breakpoint *bp, *next;
-    KVMState *s = current_cpu->kvm_state;
-    CPUArchState *env;
-    CPUState *cpu;
+    KVMState *s = cpu->kvm_state;
 
     QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) {
-        if (kvm_arch_remove_sw_breakpoint(current_cpu, bp) != 0) {
+        if (kvm_arch_remove_sw_breakpoint(cpu, bp) != 0) {
             /* Try harder to find a CPU that currently sees the breakpoint. */
             for (env = first_cpu; env != NULL; env = env->next_cpu) {
                 cpu = ENV_GET_CPU(env);
@@ -2019,19 +2014,19 @@ int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap)
     return -EINVAL;
 }
 
-int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr,
+int kvm_insert_breakpoint(CPUArchState *env, target_ulong addr,
                           target_ulong len, int type)
 {
     return -EINVAL;
 }
 
-int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr,
+int kvm_remove_breakpoint(CPUArchState *env, target_ulong addr,
                           target_ulong len, int type)
 {
     return -EINVAL;
 }
 
-void kvm_remove_all_breakpoints(CPUArchState *current_env)
+void kvm_remove_all_breakpoints(CPUArchState *env)
 {
 }
 #endif /* !KVM_CAP_SET_GUEST_DEBUG */
diff --git a/kvm-stub.c b/kvm-stub.c
index 5457fe8..76da61e 100644
--- a/kvm-stub.c
+++ b/kvm-stub.c
@@ -83,19 +83,19 @@ int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap)
     return -ENOSYS;
 }
 
-int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr,
+int kvm_insert_breakpoint(CPUArchState *env, target_ulong addr,
                           target_ulong len, int type)
 {
     return -EINVAL;
 }
 
-int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr,
+int kvm_remove_breakpoint(CPUArchState *env, target_ulong addr,
                           target_ulong len, int type)
 {
     return -EINVAL;
 }
 
-void kvm_remove_all_breakpoints(CPUArchState *current_env)
+void kvm_remove_all_breakpoints(CPUArchState *env)
 {
 }
 
-- 
1.8.1.4