Re: [Qemu-devel] [PATCH qom-cpu v2 22/40] translate-all: Change cpu_restore_state() argument to CPUState

["Andreas Färber" <afaerber@suse.de>]

Hi Max,

Am 11.03.2014 16:02, schrieb Max Filippov:
> Hi Andreas,
> 
> On Mon, Mar 10, 2014 at 4:15 AM, Andreas Färber <afaerber@suse.de> wrote:
>> diff --git a/target-xtensa/op_helper.c b/target-xtensa/op_helper.c
>> index 4265378..8641e5d 100644
>> --- a/target-xtensa/op_helper.c
>> +++ b/target-xtensa/op_helper.c
>> @@ -54,7 +54,7 @@ static void do_unaligned_access(CPUXtensaState *env,
>>  {
>>      if (xtensa_option_enabled(env->config, XTENSA_OPTION_UNALIGNED_EXCEPTION) &&
>>              !xtensa_option_enabled(env->config, XTENSA_OPTION_HW_ALIGNMENT)) {
>> -        cpu_restore_state(env, retaddr);
>> +        cpu_restore_state(ENV_GET_CPU(env), retaddr);
> 
> In other patches if this series you use CPU(xtensa_env_get_cpu(env)),
> why ENV_GET_CPU here?

Shouldn't be, thanks for catching! :) I cherry-picked these patches from
v1 branch but didn't fully re-review all of them. I found a few more
ENV_GET_CPU() in this particular patch, but no further ones.

ENV_GET_CPU() is supposed to go away (or at least be limited to cputlb
code) once all common code uses CPUState; plus the env-to-actual-cpu
code is just an offset whereas ENV_GET_CPU() adds a CPU() cast and is
therefore limited to where to the branch or singular user where is
really needed - at least before CPU address spaces added more usages
(those patches were applied without my placement review).

diff --git a/target-sparc/helper.c b/target-sparc/helper.c
index 8d1b72d..f3c7fbf 100644
--- a/target-sparc/helper.c
+++ b/target-sparc/helper.c
@@ -71,6 +71,7 @@ void helper_tick_set_limit(void *opaque, uint64_t limit)
 static target_ulong helper_udiv_common(CPUSPARCState *env, target_ulong a,
                                        target_ulong b, int cc)
 {
+    SPARCCPU *cpu = sparc_env_get_cpu(env);
     int overflow = 0;
     uint64_t x0;
     uint32_t x1;
@@ -79,7 +80,7 @@ static target_ulong helper_udiv_common(CPUSPARCState
*env, target_ulong a,
     x1 = (b & 0xffffffff);

     if (x1 == 0) {
-        cpu_restore_state(ENV_GET_CPU(env), GETPC());
+        cpu_restore_state(CPU(cpu), GETPC());
         helper_raise_exception(env, TT_DIV_ZERO);
     }

@@ -110,6 +111,7 @@ target_ulong helper_udiv_cc(CPUSPARCState *env,
target_ulong a, target_ulong b)
 static target_ulong helper_sdiv_common(CPUSPARCState *env, target_ulong a,
                                        target_ulong b, int cc)
 {
+    SPARCCPU *cpu = sparc_env_get_cpu(env);
     int overflow = 0;
     int64_t x0;
     int32_t x1;
@@ -118,7 +120,7 @@ static target_ulong helper_sdiv_common(CPUSPARCState
*env, target_ulong a,
     x1 = (b & 0xffffffff);

     if (x1 == 0) {
-        cpu_restore_state(ENV_GET_CPU(env), GETPC());
+        cpu_restore_state(CPU(cpu), GETPC());
         helper_raise_exception(env, TT_DIV_ZERO);
     }

@@ -151,7 +153,9 @@ int64_t helper_sdivx(CPUSPARCState *env, int64_t a,
int64_t b)
 {
     if (b == 0) {
         /* Raise divide by zero trap.  */
-        cpu_restore_state(ENV_GET_CPU(env), GETPC());
+        SPARCCPU *cpu = sparc_env_get_cpu(env);
+
+        cpu_restore_state(CPU(cpu), GETPC());
         helper_raise_exception(env, TT_DIV_ZERO);
     } else if (b == -1) {
         /* Avoid overflow trap with i386 divide insn.  */
@@ -165,7 +169,9 @@ uint64_t helper_udivx(CPUSPARCState *env, uint64_t
a, uint64_t b)
 {
     if (b == 0) {
         /* Raise divide by zero trap.  */
-        cpu_restore_state(ENV_GET_CPU(env), GETPC());
+        SPARCCPU *cpu = sparc_env_get_cpu(env);
+
+        cpu_restore_state(CPU(cpu), GETPC());
         helper_raise_exception(env, TT_DIV_ZERO);
     }
     return a / b;
@@ -175,6 +181,7 @@ uint64_t helper_udivx(CPUSPARCState *env, uint64_t
a, uint64_t b)
 target_ulong helper_taddcctv(CPUSPARCState *env, target_ulong src1,
                              target_ulong src2)
 {
+    SPARCCPU *cpu = sparc_env_get_cpu(env);
     target_ulong dst;

     /* Tag overflow occurs if either input has bits 0 or 1 set.  */
@@ -197,13 +204,14 @@ target_ulong helper_taddcctv(CPUSPARCState *env,
target_ulong src1,
     return dst;

  tag_overflow:
-    cpu_restore_state(ENV_GET_CPU(env), GETPC());
+    cpu_restore_state(CPU(cpu), GETPC());
     helper_raise_exception(env, TT_TOVF);
 }

 target_ulong helper_tsubcctv(CPUSPARCState *env, target_ulong src1,
                              target_ulong src2)
 {
+    SPARCCPU *cpu = sparc_env_get_cpu(env);
     target_ulong dst;

     /* Tag overflow occurs if either input has bits 0 or 1 set.  */
@@ -226,7 +234,7 @@ target_ulong helper_tsubcctv(CPUSPARCState *env,
target_ulong src1,
     return dst;

  tag_overflow:
-    cpu_restore_state(ENV_GET_CPU(env), GETPC());
+    cpu_restore_state(CPU(cpu), GETPC());
     helper_raise_exception(env, TT_TOVF);
 }

diff --git a/target-sparc/ldst_helper.c b/target-sparc/ldst_helper.c
index 2359a62..fb1e2f7 100644
--- a/target-sparc/ldst_helper.c
+++ b/target-sparc/ldst_helper.c
@@ -2420,12 +2420,13 @@ static void QEMU_NORETURN
do_unaligned_access(CPUSPARCState *env,
                                               target_ulong addr, int
is_write,
                                               int is_user, uintptr_t
retaddr)
 {
+    SPARCCPU *cpu = sparc_env_get_cpu(env);
 #ifdef DEBUG_UNALIGNED
     printf("Unaligned access to 0x" TARGET_FMT_lx " from 0x" TARGET_FMT_lx
            "\n", addr, env->pc);
 #endif
     if (retaddr) {
-        cpu_restore_state(ENV_GET_CPU(env), retaddr);
+        cpu_restore_state(CPU(cpu), retaddr);
     }
     helper_raise_exception(env, TT_UNALIGNED);
 }
diff --git a/target-xtensa/op_helper.c b/target-xtensa/op_helper.c
index 8641e5d..8233443 100644
--- a/target-xtensa/op_helper.c
+++ b/target-xtensa/op_helper.c
@@ -52,9 +52,11 @@ static void do_unaligned_access(CPUXtensaState *env,
 static void do_unaligned_access(CPUXtensaState *env,
         target_ulong addr, int is_write, int is_user, uintptr_t retaddr)
 {
+    XtensaCPU *cpu = xtensa_env_get_cpu(env);
+
     if (xtensa_option_enabled(env->config,
XTENSA_OPTION_UNALIGNED_EXCEPTION) &&
             !xtensa_option_enabled(env->config,
XTENSA_OPTION_HW_ALIGNMENT)) {
-        cpu_restore_state(ENV_GET_CPU(env), retaddr);
+        cpu_restore_state(CPU(cpu), retaddr);
         HELPER(exception_cause_vaddr)(env,
                 env->pc, LOAD_STORE_ALIGNMENT_CAUSE, addr);
     }


Regards,
Andreas

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