[Qemu-devel] [PATCH 03/21] qemu-kvm: Clean up register access API

[Jan Kiszka]

qemu-kvm's functios for accessing the VCPU registers are
kvm_arch_load/save_regs. Use them directly instead of going through
various wrappers. Specifically, we do not need on_vcpu wrapping as all
users either already run in the related thread or call while the vm is
stopped.

Signed-off-by: Jan Kiszka <address@hidden>
---
 qemu-kvm.c            |   37 +++----------------------------------
 qemu-kvm.h            |   11 -----------
 target-ia64/machine.c |    4 ++--
 3 files changed, 5 insertions(+), 47 deletions(-)

diff --git a/qemu-kvm.c b/qemu-kvm.c
index a305907..97c098c 100644
--- a/qemu-kvm.c
+++ b/qemu-kvm.c
@@ -862,7 +862,7 @@ int pre_kvm_run(kvm_context_t kvm, CPUState *env)
     kvm_arch_pre_run(env, env->kvm_run);
 
     if (env->kvm_cpu_state.regs_modified) {
-        kvm_arch_put_registers(env);
+        kvm_arch_load_regs(env);
         env->kvm_cpu_state.regs_modified = 0;
     }
 
@@ -1532,16 +1532,11 @@ static void on_vcpu(CPUState *env, void (*func)(void 
*data), void *data)
         qemu_cond_wait(&qemu_work_cond);
 }
 
-void kvm_arch_get_registers(CPUState *env)
-{
-       kvm_arch_save_regs(env);
-}
-
 static void do_kvm_cpu_synchronize_state(void *_env)
 {
     CPUState *env = _env;
     if (!env->kvm_cpu_state.regs_modified) {
-        kvm_arch_get_registers(env);
+        kvm_arch_save_regs(env);
         env->kvm_cpu_state.regs_modified = 1;
     }
 }
@@ -1584,32 +1579,6 @@ void kvm_update_interrupt_request(CPUState *env)
     }
 }
 
-static void kvm_do_load_registers(void *_env)
-{
-    CPUState *env = _env;
-
-    kvm_arch_load_regs(env);
-}
-
-void kvm_load_registers(CPUState *env)
-{
-    if (kvm_enabled() && qemu_system_ready)
-        on_vcpu(env, kvm_do_load_registers, env);
-}
-
-static void kvm_do_save_registers(void *_env)
-{
-    CPUState *env = _env;
-
-    kvm_arch_save_regs(env);
-}
-
-void kvm_save_registers(CPUState *env)
-{
-    if (kvm_enabled())
-        on_vcpu(env, kvm_do_save_registers, env);
-}
-
 static void kvm_do_load_mpstate(void *_env)
 {
     CPUState *env = _env;
@@ -2379,7 +2348,7 @@ static void kvm_invoke_set_guest_debug(void *data)
     struct kvm_set_guest_debug_data *dbg_data = data;
 
     if (cpu_single_env->kvm_cpu_state.regs_modified) {
-        kvm_arch_put_registers(cpu_single_env);
+        kvm_arch_save_regs(cpu_single_env);
         cpu_single_env->kvm_cpu_state.regs_modified = 0;
     }
     dbg_data->err =
diff --git a/qemu-kvm.h b/qemu-kvm.h
index 6b3e5a1..1354227 100644
--- a/qemu-kvm.h
+++ b/qemu-kvm.h
@@ -902,8 +902,6 @@ int kvm_main_loop(void);
 int kvm_init_ap(void);
 #ifndef QEMU_KVM_NO_CPU
 int kvm_vcpu_inited(CPUState *env);
-void kvm_load_registers(CPUState *env);
-void kvm_save_registers(CPUState *env);
 void kvm_load_mpstate(CPUState *env);
 void kvm_save_mpstate(CPUState *env);
 int kvm_cpu_exec(CPUState *env);
@@ -1068,8 +1066,6 @@ void kvm_load_tsc(CPUState *env);
 #ifdef TARGET_I386
 #define qemu_kvm_has_pit_state2() (0)
 #endif
-#define kvm_load_registers(env) do {} while(0)
-#define kvm_save_registers(env) do {} while(0)
 #define kvm_save_mpstate(env)   do {} while(0)
 #define qemu_kvm_cpu_stop(env) do {} while(0)
 static inline void kvm_init_vcpu(CPUState *env)
@@ -1098,13 +1094,6 @@ static inline int kvm_sync_vcpus(void)
 }
 
 #ifndef QEMU_KVM_NO_CPU
-void kvm_arch_get_registers(CPUState *env);
-
-static inline void kvm_arch_put_registers(CPUState *env)
-{
-    kvm_load_registers(env);
-}
-
 void kvm_cpu_synchronize_state(CPUState *env);
 
 static inline void cpu_synchronize_state(CPUState *env)
diff --git a/target-ia64/machine.c b/target-ia64/machine.c
index 70ef379..7d29575 100644
--- a/target-ia64/machine.c
+++ b/target-ia64/machine.c
@@ -9,7 +9,7 @@ void cpu_save(QEMUFile *f, void *opaque)
     CPUState *env = opaque;
 
     if (kvm_enabled()) {
-        kvm_save_registers(env);
+        kvm_arch_save_regs(env);
         kvm_arch_save_mpstate(env);
     }
 }
@@ -19,7 +19,7 @@ int cpu_load(QEMUFile *f, void *opaque, int version_id)
     CPUState *env = opaque;
 
     if (kvm_enabled()) {
-        kvm_load_registers(env);
+        kvm_arch_load_regs(env);
         kvm_arch_load_mpstate(env);
     }
     return 0;
-- 
1.6.0.2