diff mbox series

[06/10] accel/tcg: Remove cpu_unwind_state_data() unused CPUState argument

Message ID 20241115152053.66442-7-philmd@linaro.org
State New
Headers show
Series accel/tcg: API prototype cleanups | expand

Commit Message

Philippe Mathieu-Daudé Nov. 15, 2024, 3:20 p.m. UTC
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 include/exec/translate-all.h | 3 +--
 accel/tcg/translate-all.c    | 2 +-
 target/i386/helper.c         | 3 ++-
 target/openrisc/sys_helper.c | 7 +++----
 4 files changed, 7 insertions(+), 8 deletions(-)

Comments

Peter Maydell Nov. 15, 2024, 3:50 p.m. UTC | #1
On Fri, 15 Nov 2024 at 15:23, Philippe Mathieu-Daudé <philmd@linaro.org> wrote:
>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>  include/exec/translate-all.h | 3 +--
>  accel/tcg/translate-all.c    | 2 +-
>  target/i386/helper.c         | 3 ++-
>  target/openrisc/sys_helper.c | 7 +++----
>  4 files changed, 7 insertions(+), 8 deletions(-)
>
> diff --git a/include/exec/translate-all.h b/include/exec/translate-all.h
> index f06cfedd52..9303318953 100644
> --- a/include/exec/translate-all.h
> +++ b/include/exec/translate-all.h
> @@ -23,7 +23,6 @@
>
>  /**
>   * cpu_unwind_state_data:
> - * @cpu: the cpu context
>   * @host_pc: the host pc within the translation
>   * @data: output data
>   *
> @@ -32,7 +31,7 @@
>   * function returns false; otherwise @data is loaded.
>   * This is the same unwind info as given to restore_state_to_opc.
>   */
> -bool cpu_unwind_state_data(CPUState *cpu, uintptr_t host_pc, uint64_t *data);
> +bool cpu_unwind_state_data(uintptr_t host_pc, uint64_t *data);
>
>  /* translate-all.c */
>  void tb_check_watchpoint(CPUState *cpu, uintptr_t retaddr);
> diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c
> index fdf6d8ac19..8d5530e341 100644
> --- a/accel/tcg/translate-all.c
> +++ b/accel/tcg/translate-all.c
> @@ -243,7 +243,7 @@ bool cpu_restore_state(CPUState *cpu, uintptr_t host_pc)
>      return false;
>  }
>
> -bool cpu_unwind_state_data(CPUState *cpu, uintptr_t host_pc, uint64_t *data)
> +bool cpu_unwind_state_data(uintptr_t host_pc, uint64_t *data)
>  {
>      if (in_code_gen_buffer((const void *)(host_pc - tcg_splitwx_diff))) {
>          TranslationBlock *tb = tcg_tb_lookup(host_pc);
> diff --git a/target/i386/helper.c b/target/i386/helper.c
> index 01a268a30b..b848936441 100644
> --- a/target/i386/helper.c
> +++ b/target/i386/helper.c
> @@ -29,6 +29,7 @@
>  #endif
>  #include "qemu/log.h"
>  #ifdef CONFIG_TCG
> +#include "exec/translate-all.h"

Ah, here are those includes. These should be in the
previous patch I think.


-- PMM
Richard Henderson Nov. 15, 2024, 5:23 p.m. UTC | #2
On 11/15/24 07:20, Philippe Mathieu-Daudé wrote:
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   include/exec/translate-all.h | 3 +--
>   accel/tcg/translate-all.c    | 2 +-
>   target/i386/helper.c         | 3 ++-
>   target/openrisc/sys_helper.c | 7 +++----
>   4 files changed, 7 insertions(+), 8 deletions(-)
> 
> diff --git a/include/exec/translate-all.h b/include/exec/translate-all.h
> index f06cfedd52..9303318953 100644
> --- a/include/exec/translate-all.h
> +++ b/include/exec/translate-all.h
> @@ -23,7 +23,6 @@
>   
>   /**
>    * cpu_unwind_state_data:
> - * @cpu: the cpu context
>    * @host_pc: the host pc within the translation
>    * @data: output data
>    *
> @@ -32,7 +31,7 @@
>    * function returns false; otherwise @data is loaded.
>    * This is the same unwind info as given to restore_state_to_opc.
>    */
> -bool cpu_unwind_state_data(CPUState *cpu, uintptr_t host_pc, uint64_t *data);
> +bool cpu_unwind_state_data(uintptr_t host_pc, uint64_t *data);

Hmm.  I wonder if it should be called "cpu_*" at all then?
Worth renaming to "tcg_*" or something?

Anyway,
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>


r~
Peter Maydell Nov. 15, 2024, 5:33 p.m. UTC | #3
On Fri, 15 Nov 2024 at 17:24, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> On 11/15/24 07:20, Philippe Mathieu-Daudé wrote:
> > Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> > ---
> >   include/exec/translate-all.h | 3 +--
> >   accel/tcg/translate-all.c    | 2 +-
> >   target/i386/helper.c         | 3 ++-
> >   target/openrisc/sys_helper.c | 7 +++----
> >   4 files changed, 7 insertions(+), 8 deletions(-)
> >
> > diff --git a/include/exec/translate-all.h b/include/exec/translate-all.h
> > index f06cfedd52..9303318953 100644
> > --- a/include/exec/translate-all.h
> > +++ b/include/exec/translate-all.h
> > @@ -23,7 +23,6 @@
> >
> >   /**
> >    * cpu_unwind_state_data:
> > - * @cpu: the cpu context
> >    * @host_pc: the host pc within the translation
> >    * @data: output data
> >    *
> > @@ -32,7 +31,7 @@
> >    * function returns false; otherwise @data is loaded.
> >    * This is the same unwind info as given to restore_state_to_opc.
> >    */
> > -bool cpu_unwind_state_data(CPUState *cpu, uintptr_t host_pc, uint64_t *data);
> > +bool cpu_unwind_state_data(uintptr_t host_pc, uint64_t *data);
>
> Hmm.  I wonder if it should be called "cpu_*" at all then?
> Worth renaming to "tcg_*" or something?

Yes, it's odd, isn't it?

What's the plan for this function in a multi-target
emulation world? At the moment it (or functions it
calls) uses TARGET_INSN_START_WORDS which is a
target-CPU-type-specific value. If in the future we're
going to want it instead to look that up as e.g. some
property of the CPU class then maybe we should keep
passing it the CPU pointer? Or would we instead say
that we'll define TARGET_INSN_START_WORDS as the worst
case for any target, since it's always between 1 and 3,
so it doesn't waste that much space if we have a couple
of extra sleb128 zero values for targets that don't need
all 3 words?

thanks
-- PMM
diff mbox series

Patch

diff --git a/include/exec/translate-all.h b/include/exec/translate-all.h
index f06cfedd52..9303318953 100644
--- a/include/exec/translate-all.h
+++ b/include/exec/translate-all.h
@@ -23,7 +23,6 @@ 
 
 /**
  * cpu_unwind_state_data:
- * @cpu: the cpu context
  * @host_pc: the host pc within the translation
  * @data: output data
  *
@@ -32,7 +31,7 @@ 
  * function returns false; otherwise @data is loaded.
  * This is the same unwind info as given to restore_state_to_opc.
  */
-bool cpu_unwind_state_data(CPUState *cpu, uintptr_t host_pc, uint64_t *data);
+bool cpu_unwind_state_data(uintptr_t host_pc, uint64_t *data);
 
 /* translate-all.c */
 void tb_check_watchpoint(CPUState *cpu, uintptr_t retaddr);
diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c
index fdf6d8ac19..8d5530e341 100644
--- a/accel/tcg/translate-all.c
+++ b/accel/tcg/translate-all.c
@@ -243,7 +243,7 @@  bool cpu_restore_state(CPUState *cpu, uintptr_t host_pc)
     return false;
 }
 
-bool cpu_unwind_state_data(CPUState *cpu, uintptr_t host_pc, uint64_t *data)
+bool cpu_unwind_state_data(uintptr_t host_pc, uint64_t *data)
 {
     if (in_code_gen_buffer((const void *)(host_pc - tcg_splitwx_diff))) {
         TranslationBlock *tb = tcg_tb_lookup(host_pc);
diff --git a/target/i386/helper.c b/target/i386/helper.c
index 01a268a30b..b848936441 100644
--- a/target/i386/helper.c
+++ b/target/i386/helper.c
@@ -29,6 +29,7 @@ 
 #endif
 #include "qemu/log.h"
 #ifdef CONFIG_TCG
+#include "exec/translate-all.h"
 #include "tcg/insn-start-words.h"
 #endif
 
@@ -526,7 +527,7 @@  static inline target_ulong get_memio_eip(CPUX86State *env)
     uint64_t data[TARGET_INSN_START_WORDS];
     CPUState *cs = env_cpu(env);
 
-    if (!cpu_unwind_state_data(cs, cs->mem_io_pc, data)) {
+    if (!cpu_unwind_state_data(cs->mem_io_pc, data)) {
         return env->eip;
     }
 
diff --git a/target/openrisc/sys_helper.c b/target/openrisc/sys_helper.c
index 77567afba4..67e1f53fca 100644
--- a/target/openrisc/sys_helper.c
+++ b/target/openrisc/sys_helper.c
@@ -20,7 +20,7 @@ 
 
 #include "qemu/osdep.h"
 #include "cpu.h"
-#include "exec/exec-all.h"
+#include "exec/translate-all.h"
 #include "exec/helper-proto.h"
 #include "exception.h"
 #ifndef CONFIG_USER_ONLY
@@ -219,7 +219,6 @@  target_ulong HELPER(mfspr)(CPUOpenRISCState *env, target_ulong rd,
 #ifndef CONFIG_USER_ONLY
     uint64_t data[TARGET_INSN_START_WORDS];
     MachineState *ms = MACHINE(qdev_get_machine());
-    CPUState *cs = env_cpu(env);
     int idx;
 #endif
 
@@ -260,7 +259,7 @@  target_ulong HELPER(mfspr)(CPUOpenRISCState *env, target_ulong rd,
         return env->evbar;
 
     case TO_SPR(0, 16): /* NPC (equals PC) */
-        if (cpu_unwind_state_data(cs, GETPC(), data)) {
+        if (cpu_unwind_state_data(GETPC(), data)) {
             return data[0];
         }
         return env->pc;
@@ -269,7 +268,7 @@  target_ulong HELPER(mfspr)(CPUOpenRISCState *env, target_ulong rd,
         return cpu_get_sr(env);
 
     case TO_SPR(0, 18): /* PPC */
-        if (cpu_unwind_state_data(cs, GETPC(), data)) {
+        if (cpu_unwind_state_data(GETPC(), data)) {
             if (data[1] & 2) {
                 return data[0] - 4;
             }