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Re: [PATCH 2/2] bulk: Prefer fast cpu_env() over slower CPU QOM cast mac


From: Thomas Huth
Subject: Re: [PATCH 2/2] bulk: Prefer fast cpu_env() over slower CPU QOM cast macro
Date: Fri, 26 Jan 2024 18:09:08 +0100
User-agent: Mozilla Thunderbird

On 25/01/2024 17.56, Philippe Mathieu-Daudé wrote:
Mechanical patch produced running the command documented
in scripts/coccinelle/cpu_env.cocci_template header.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
  target/i386/hvf/vmx.h                   |  9 +++----
  hw/i386/vmmouse.c                       |  6 ++---
  hw/i386/xen/xen-hvm.c                   |  3 +--
  hw/intc/arm_gicv3_cpuif_common.c        |  3 +--
  hw/ppc/mpc8544_guts.c                   |  3 +--
  hw/ppc/pnv.c                            |  3 +--
  hw/ppc/pnv_xscom.c                      |  3 +--
  hw/ppc/ppce500_spin.c                   |  3 +--
  hw/ppc/spapr.c                          |  3 +--
  hw/ppc/spapr_caps.c                     |  6 ++---
  target/alpha/cpu.c                      | 21 +++++----------
  target/alpha/gdbstub.c                  |  6 ++---
  target/alpha/helper.c                   | 12 +++------
  target/alpha/mem_helper.c               |  9 +++----
  target/arm/cpu.c                        | 15 ++++-------
  target/arm/debug_helper.c               |  6 ++---
  target/arm/gdbstub.c                    |  6 ++---
  target/arm/gdbstub64.c                  |  6 ++---
  target/arm/helper.c                     |  9 +++----
  target/arm/hvf/hvf.c                    | 12 +++------
  target/arm/kvm.c                        |  3 +--
  target/arm/ptw.c                        |  3 +--
  target/arm/tcg/cpu32.c                  |  3 +--
  target/avr/cpu.c                        | 21 +++++----------
  target/avr/gdbstub.c                    |  6 ++---
  target/avr/helper.c                     |  9 +++----
  target/cris/cpu.c                       |  3 +--
  target/cris/gdbstub.c                   |  9 +++----
  target/cris/helper.c                    | 12 +++------
  target/cris/translate.c                 |  3 +--
  target/hppa/cpu.c                       |  6 ++---
  target/hppa/int_helper.c                |  6 ++---
  target/hppa/mem_helper.c                |  3 +--
  target/i386/arch_memory_mapping.c       |  3 +--
  target/i386/cpu-dump.c                  |  3 +--
  target/i386/cpu.c                       | 36 +++++++++----------------
  target/i386/helper.c                    | 30 +++++++--------------
  target/i386/hvf/hvf.c                   |  6 ++---
  target/i386/hvf/x86.c                   |  3 +--
  target/i386/hvf/x86_emu.c               |  6 ++---
  target/i386/hvf/x86_task.c              | 10 +++----
  target/i386/hvf/x86hvf.c                |  6 ++---
  target/i386/kvm/kvm.c                   |  6 ++---
  target/i386/kvm/xen-emu.c               | 30 +++++++--------------
  target/i386/tcg/sysemu/bpt_helper.c     |  3 +--
  target/i386/tcg/tcg-cpu.c               | 12 +++------
  target/i386/tcg/user/excp_helper.c      |  3 +--
  target/i386/tcg/user/seg_helper.c       |  3 +--
  target/m68k/cpu.c                       | 30 +++++++--------------
  target/m68k/gdbstub.c                   |  6 ++---
  target/m68k/helper.c                    |  3 +--
  target/m68k/m68k-semi.c                 |  6 ++---
  target/m68k/op_helper.c                 |  9 +++----
  target/m68k/translate.c                 |  3 +--
  target/microblaze/helper.c              |  3 +--
  target/microblaze/translate.c           |  3 +--
  target/mips/cpu.c                       |  9 +++----
  target/mips/gdbstub.c                   |  6 ++---
  target/mips/kvm.c                       | 27 +++++++------------
  target/mips/sysemu/physaddr.c           |  3 +--
  target/mips/tcg/exception.c             |  3 +--
  target/mips/tcg/op_helper.c             |  3 +--
  target/mips/tcg/sysemu/special_helper.c |  3 +--
  target/mips/tcg/sysemu/tlb_helper.c     |  6 ++---
  target/mips/tcg/translate.c             |  3 +--
  target/nios2/cpu.c                      |  9 +++----
  target/nios2/helper.c                   |  3 +--
  target/nios2/nios2-semi.c               |  6 ++---
  target/openrisc/gdbstub.c               |  3 +--
  target/openrisc/interrupt.c             |  6 ++---
  target/openrisc/translate.c             |  3 +--
  target/ppc/cpu_init.c                   |  9 +++----
  target/ppc/excp_helper.c                |  3 +--
  target/ppc/gdbstub.c                    | 12 +++------
  target/ppc/kvm.c                        |  6 ++---
  target/ppc/ppc-qmp-cmds.c               |  3 +--
  target/ppc/user_only_helper.c           |  3 +--
  target/riscv/arch_dump.c                |  6 ++---
  target/riscv/cpu.c                      | 15 ++++-------
  target/riscv/cpu_helper.c               | 13 +++------
  target/riscv/debug.c                    |  9 +++----
  target/riscv/gdbstub.c                  |  6 ++---
  target/riscv/kvm/kvm-cpu.c              |  6 ++---
  target/riscv/tcg/tcg-cpu.c              |  9 +++----
  target/riscv/translate.c                |  3 +--
  target/rx/gdbstub.c                     |  6 ++---
  target/rx/helper.c                      |  6 ++---
  target/rx/translate.c                   |  3 +--
  target/s390x/cpu-dump.c                 |  3 +--
  target/s390x/gdbstub.c                  |  6 ++---
  target/s390x/helper.c                   |  3 +--
  target/s390x/kvm/kvm.c                  |  6 ++---
  target/s390x/tcg/excp_helper.c          |  9 +++----
  target/s390x/tcg/translate.c            |  3 +--
  target/sh4/cpu.c                        | 15 ++++-------
  target/sh4/gdbstub.c                    |  6 ++---
  target/sh4/helper.c                     |  9 +++----
  target/sh4/translate.c                  |  3 +--
  target/sparc/cpu.c                      | 12 +++------
  target/sparc/gdbstub.c                  |  3 +--
  target/sparc/int32_helper.c             |  3 +--
  target/sparc/int64_helper.c             |  3 +--
  target/sparc/ldst_helper.c              |  6 ++---
  target/sparc/mmu_helper.c               | 15 ++++-------
  target/sparc/translate.c                |  3 +--
  target/tricore/cpu.c                    | 12 +++------
  target/tricore/gdbstub.c                |  6 ++---
  target/tricore/helper.c                 |  3 +--
  target/tricore/translate.c              |  3 +--
  target/xtensa/dbg_helper.c              |  3 +--
  target/xtensa/exc_helper.c              |  3 +--
  target/xtensa/gdbstub.c                 |  6 ++---
  target/xtensa/helper.c                  |  9 +++----
  target/xtensa/translate.c               |  3 +--
  114 files changed, 273 insertions(+), 548 deletions(-)

A huge patch ... I wonder whether it would make sense to split it up by target architecture to ease the review?

...
diff --git a/hw/i386/vmmouse.c b/hw/i386/vmmouse.c
index a8d014d09a..eb0613bfbe 100644
--- a/hw/i386/vmmouse.c
+++ b/hw/i386/vmmouse.c
@@ -74,8 +74,7 @@ struct VMMouseState {
static void vmmouse_get_data(uint32_t *data)
  {
-    X86CPU *cpu = X86_CPU(current_cpu);
-    CPUX86State *env = &cpu->env;
+    CPUX86State *env = cpu_env(CPU(current_cpu));

No need for the CPU() cast here, current_cpu is already
of type "CPUState *".

data[0] = env->regs[R_EAX]; data[1] = env->regs[R_EBX];
      data[2] = env->regs[R_ECX]; data[3] = env->regs[R_EDX];
@@ -84,8 +83,7 @@ static void vmmouse_get_data(uint32_t *data)
static void vmmouse_set_data(const uint32_t *data)
  {
-    X86CPU *cpu = X86_CPU(current_cpu);
-    CPUX86State *env = &cpu->env;
+    CPUX86State *env = cpu_env(CPU(current_cpu));

dito.

      env->regs[R_EAX] = data[0]; env->regs[R_EBX] = data[1];
      env->regs[R_ECX] = data[2]; env->regs[R_EDX] = data[3];
diff --git a/hw/i386/xen/xen-hvm.c b/hw/i386/xen/xen-hvm.c
index f42621e674..3d3ae49be5 100644
--- a/hw/i386/xen/xen-hvm.c
+++ b/hw/i386/xen/xen-hvm.c
@@ -487,8 +487,7 @@ static void regs_to_cpu(vmware_regs_t *vmport_regs, ioreq_t 
*req)
static void regs_from_cpu(vmware_regs_t *vmport_regs)
  {
-    X86CPU *cpu = X86_CPU(current_cpu);
-    CPUX86State *env = &cpu->env;
+    CPUX86State *env = cpu_env(CPU(current_cpu));

dito.

      vmport_regs->ebx = env->regs[R_EBX];
      vmport_regs->ecx = env->regs[R_ECX];
...
diff --git a/hw/ppc/mpc8544_guts.c b/hw/ppc/mpc8544_guts.c
index a26e83d048..3c6a852ad4 100644
--- a/hw/ppc/mpc8544_guts.c
+++ b/hw/ppc/mpc8544_guts.c
@@ -71,8 +71,7 @@ static uint64_t mpc8544_guts_read(void *opaque, hwaddr addr,
                                    unsigned size)
  {
      uint32_t value = 0;
-    PowerPCCPU *cpu = POWERPC_CPU(current_cpu);
-    CPUPPCState *env = &cpu->env;
+    CPUPPCState *env = cpu_env(CPU(current_cpu));

dito ...

I'll stop here, please respin with the cpu_env(CPU(current_cpu)) fixed to
cpu_env(current_cpu), and please split the patch by target CPU types.

 Thanks,
  Thomas




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