[Qemu-devel] [PATCH v4 1/9] trace: Add support for vCPU pointers in trace events

["Lluís Vilanova" <vilanova@ac.upc.edu>]

The tracing infrastructure later needs to differentiate between regular
pointers and pointers to vCPUs.

Also changes all targets to use the new 'TCGv_cpu' type instead of the
generic 'TCGv_ptr'. As of now, the change is merely cosmetic ('TCGv_cpu'
translates into 'TCGv_ptr'), but that could change in the future to
enforce the difference.

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
---
 include/qemu/typedefs.h        |    1 +
 scripts/tracetool/transform.py |    9 ++++++++-
 target-alpha/translate.c       |    2 +-
 target-arm/translate.c         |    2 +-
 target-arm/translate.h         |    2 +-
 target-cris/translate.c        |    2 +-
 target-i386/translate.c        |    2 +-
 target-lm32/translate.c        |    2 +-
 target-m68k/translate.c        |    2 +-
 target-microblaze/translate.c  |    2 +-
 target-mips/translate.c        |    2 +-
 target-moxie/translate.c       |    2 +-
 target-openrisc/translate.c    |    2 +-
 target-ppc/translate.c         |    2 +-
 target-s390x/translate.c       |    2 +-
 target-sh4/translate.c         |    2 +-
 target-sparc/translate.c       |    5 +++--
 target-tilegx/translate.c      |    2 +-
 target-tricore/translate.c     |    2 +-
 target-unicore32/translate.c   |    2 +-
 target-xtensa/translate.c      |    2 +-
 tcg/tcg-op.h                   |    2 --
 tcg/tcg.h                      |    6 ++++++
 trace/control.h                |    3 ++-
 24 files changed, 38 insertions(+), 24 deletions(-)

diff --git a/include/qemu/typedefs.h b/include/qemu/typedefs.h
index 78fe6e8..efbc8a9 100644
--- a/include/qemu/typedefs.h
+++ b/include/qemu/typedefs.h
@@ -18,6 +18,7 @@ typedef struct BusState BusState;
 typedef struct CharDriverState CharDriverState;
 typedef struct CompatProperty CompatProperty;
 typedef struct CPUAddressSpace CPUAddressSpace;
+typedef struct CPUState CPUState;
 typedef struct DeviceListener DeviceListener;
 typedef struct DeviceState DeviceState;
 typedef struct DisplayChangeListener DisplayChangeListener;
diff --git a/scripts/tracetool/transform.py b/scripts/tracetool/transform.py
index fc5e679..8a43a4e 100644
--- a/scripts/tracetool/transform.py
+++ b/scripts/tracetool/transform.py
@@ -6,7 +6,7 @@ Type-transformation rules.
 """
 
 __author__     = "Lluís Vilanova <vilanova@ac.upc.edu>"
-__copyright__  = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
+__copyright__  = "Copyright 2012-2016, Lluís Vilanova <vilanova@ac.upc.edu>"
 __license__    = "GPL version 2 or (at your option) any later version"
 
 __maintainer__ = "Stefan Hajnoczi"
@@ -74,6 +74,7 @@ TCG_2_HOST = {
     "TCGv_i32": "uint32_t",
     "TCGv_i64": "uint64_t",
     "TCGv_ptr": "void *",
+    "TCGv_cpu": "CPUState *",
     None: _tcg_2_host,
     }
 
@@ -98,6 +99,7 @@ HOST_2_TCG = {
     "uint32_t": "TCGv_i32",
     "uint64_t": "TCGv_i64",
     "void *"  : "TCGv_ptr",
+    "CPUState *": "TCGv_cpu",
     None: _host_2_tcg,
     }
 
@@ -115,6 +117,8 @@ TCG_2_TCG_HELPER_DEF = {
     "TCGv_i32": "uint32_t",
     "TCGv_i64": "uint64_t",
     "TCGv_ptr": "void *",
+    "TCGv_cpu": "void *",
+    "CPUState *": "void *",
     None: _tcg_2_helper_def,
     }
 
@@ -130,6 +134,7 @@ TCG_2_TCG_HELPER_DECL = {
     "TCGv_ptr": "ptr",
     "TCGv_i32": "i32",
     "TCGv_i64": "i64",
+    "TCGv_cpu": "ptr",
     None: _tcg_2_tcg_helper_decl_error,
     }
 
@@ -146,6 +151,7 @@ HOST_2_TCG_TMP_NEW = {
     "uint32_t": "tcg_const_i32",
     "uint64_t": "tcg_const_i64",
     "void *"  : "tcg_const_ptr",
+    "CPUState *": "tcg_const_ptr",
     None: _host_2_tcg_tmp_new,
     }
 
@@ -162,5 +168,6 @@ HOST_2_TCG_TMP_FREE = {
     "uint32_t": "tcg_temp_free_i32",
     "uint64_t": "tcg_temp_free_i64",
     "void *"  : "tcg_temp_free_ptr",
+    "CPUState *": "tcg_temp_free_ptr",
     None: _host_2_tcg_tmp_free,
     }
diff --git a/target-alpha/translate.c b/target-alpha/translate.c
index 9909c70..d631f74 100644
--- a/target-alpha/translate.c
+++ b/target-alpha/translate.c
@@ -91,7 +91,7 @@ typedef enum {
 } ExitStatus;
 
 /* global register indexes */
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
 static TCGv cpu_std_ir[31];
 static TCGv cpu_fir[31];
 static TCGv cpu_pc;
diff --git a/target-arm/translate.c b/target-arm/translate.c
index d485e7d..b90b932 100644
--- a/target-arm/translate.c
+++ b/target-arm/translate.c
@@ -59,7 +59,7 @@
 #define IS_USER(s) (s->user)
 #endif
 
-TCGv_ptr cpu_env;
+TCGv_cpu cpu_env;
 /* We reuse the same 64-bit temporaries for efficiency.  */
 static TCGv_i64 cpu_V0, cpu_V1, cpu_M0;
 static TCGv_i32 cpu_R[16];
diff --git a/target-arm/translate.h b/target-arm/translate.h
index 53ef971..6e8eb7d 100644
--- a/target-arm/translate.h
+++ b/target-arm/translate.h
@@ -70,7 +70,7 @@ typedef struct DisasCompare {
 } DisasCompare;
 
 /* Share the TCG temporaries common between 32 and 64 bit modes.  */
-extern TCGv_ptr cpu_env;
+extern TCGv_cpu cpu_env;
 extern TCGv_i32 cpu_NF, cpu_ZF, cpu_CF, cpu_VF;
 extern TCGv_i64 cpu_exclusive_addr;
 extern TCGv_i64 cpu_exclusive_val;
diff --git a/target-cris/translate.c b/target-cris/translate.c
index 2429931..5ce5c58 100644
--- a/target-cris/translate.c
+++ b/target-cris/translate.c
@@ -58,7 +58,7 @@
 #define CC_MASK_NZVC 0xf
 #define CC_MASK_RNZV 0x10e
 
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
 static TCGv cpu_R[16];
 static TCGv cpu_PR[16];
 static TCGv cc_x;
diff --git a/target-i386/translate.c b/target-i386/translate.c
index a3dd167..53a09f8 100644
--- a/target-i386/translate.c
+++ b/target-i386/translate.c
@@ -62,7 +62,7 @@
 //#define MACRO_TEST   1
 
 /* global register indexes */
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
 static TCGv cpu_A0;
 static TCGv cpu_cc_dst, cpu_cc_src, cpu_cc_src2, cpu_cc_srcT;
 static TCGv_i32 cpu_cc_op;
diff --git a/target-lm32/translate.c b/target-lm32/translate.c
index fa5b0b9..a333fc6 100644
--- a/target-lm32/translate.c
+++ b/target-lm32/translate.c
@@ -42,7 +42,7 @@
 
 #define MEM_INDEX 0
 
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
 static TCGv cpu_R[32];
 static TCGv cpu_pc;
 static TCGv cpu_ie;
diff --git a/target-m68k/translate.c b/target-m68k/translate.c
index 41ae2c6..d68d615 100644
--- a/target-m68k/translate.c
+++ b/target-m68k/translate.c
@@ -48,7 +48,7 @@
 static TCGv_i32 cpu_halted;
 static TCGv_i32 cpu_exception_index;
 
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
 
 static char cpu_reg_names[3*8*3 + 5*4];
 static TCGv cpu_dregs[8];
diff --git a/target-microblaze/translate.c b/target-microblaze/translate.c
index 9e52011..3e3a49d 100644
--- a/target-microblaze/translate.c
+++ b/target-microblaze/translate.c
@@ -44,7 +44,7 @@
             (((src) >> start) & ((1 << (end - start + 1)) - 1))
 
 static TCGv env_debug;
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
 static TCGv cpu_R[32];
 static TCGv cpu_SR[18];
 static TCGv env_imm;
diff --git a/target-mips/translate.c b/target-mips/translate.c
index 5626647..610ed7c 100644
--- a/target-mips/translate.c
+++ b/target-mips/translate.c
@@ -1351,7 +1351,7 @@ enum {
 };
 
 /* global register indices */
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
 static TCGv cpu_gpr[32], cpu_PC;
 static TCGv cpu_HI[MIPS_DSP_ACC], cpu_LO[MIPS_DSP_ACC];
 static TCGv cpu_dspctrl, btarget, bcond;
diff --git a/target-moxie/translate.c b/target-moxie/translate.c
index 6dedcb7..ab8f6a7 100644
--- a/target-moxie/translate.c
+++ b/target-moxie/translate.c
@@ -59,7 +59,7 @@ enum {
 
 static TCGv cpu_pc;
 static TCGv cpu_gregs[16];
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
 static TCGv cc_a, cc_b;
 
 #include "exec/gen-icount.h"
diff --git a/target-openrisc/translate.c b/target-openrisc/translate.c
index 606490a..3d29369 100644
--- a/target-openrisc/translate.c
+++ b/target-openrisc/translate.c
@@ -52,7 +52,7 @@ typedef struct DisasContext {
     uint32_t delayed_branch;
 } DisasContext;
 
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
 static TCGv cpu_sr;
 static TCGv cpu_R[32];
 static TCGv cpu_pc;
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index 4be7eaa..204cb3a 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -47,7 +47,7 @@
 /* Code translation helpers                                                  */
 
 /* global register indexes */
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
 static char cpu_reg_names[10*3 + 22*4 /* GPR */
     + 10*4 + 22*5 /* SPE GPRh */
     + 10*4 + 22*5 /* FPR */
diff --git a/target-s390x/translate.c b/target-s390x/translate.c
index c79a2cb..262da89 100644
--- a/target-s390x/translate.c
+++ b/target-s390x/translate.c
@@ -36,7 +36,7 @@
 #include "exec/cpu_ldst.h"
 
 /* global register indexes */
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
 
 #include "exec/gen-icount.h"
 #include "exec/helper-proto.h"
diff --git a/target-sh4/translate.c b/target-sh4/translate.c
index 7bc6216..c3a8fbd 100644
--- a/target-sh4/translate.c
+++ b/target-sh4/translate.c
@@ -59,7 +59,7 @@ enum {
 };
 
 /* global register indexes */
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
 static TCGv cpu_gregs[24];
 static TCGv cpu_sr, cpu_sr_m, cpu_sr_q, cpu_sr_t;
 static TCGv cpu_pc, cpu_ssr, cpu_spc, cpu_gbr;
diff --git a/target-sparc/translate.c b/target-sparc/translate.c
index f99ceed..44fdff8 100644
--- a/target-sparc/translate.c
+++ b/target-sparc/translate.c
@@ -42,7 +42,8 @@
                          according to jump_pc[T2] */
 
 /* global register indexes */
-static TCGv_ptr cpu_env, cpu_regwptr;
+static TCGv_cpu cpu_env;
+static TCGv_ptr cpu_regwptr;
 static TCGv cpu_cc_src, cpu_cc_src2, cpu_cc_dst;
 static TCGv_i32 cpu_cc_op;
 static TCGv_i32 cpu_psr;
@@ -2294,7 +2295,7 @@ static void gen_fmovq(DisasContext *dc, DisasCompare *cmp, int rd, int rs)
 }
 
 #ifndef CONFIG_USER_ONLY
-static inline void gen_load_trap_state_at_tl(TCGv_ptr r_tsptr, TCGv_ptr cpu_env)
+static inline void gen_load_trap_state_at_tl(TCGv_ptr r_tsptr, TCGv_cpu cpu_env)
 {
     TCGv_i32 r_tl = tcg_temp_new_i32();
 
diff --git a/target-tilegx/translate.c b/target-tilegx/translate.c
index 354f25a..fb5413a 100644
--- a/target-tilegx/translate.c
+++ b/target-tilegx/translate.c
@@ -30,7 +30,7 @@
 
 #define FMT64X                          "%016" PRIx64
 
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
 static TCGv cpu_pc;
 static TCGv cpu_regs[TILEGX_R_COUNT];
 
diff --git a/target-tricore/translate.c b/target-tricore/translate.c
index 135c583..655db75 100644
--- a/target-tricore/translate.c
+++ b/target-tricore/translate.c
@@ -45,7 +45,7 @@ static TCGv cpu_PSW_SV;
 static TCGv cpu_PSW_AV;
 static TCGv cpu_PSW_SAV;
 /* CPU env */
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
 
 #include "exec/gen-icount.h"
 
diff --git a/target-unicore32/translate.c b/target-unicore32/translate.c
index d2f92f0..29c22f5 100644
--- a/target-unicore32/translate.c
+++ b/target-unicore32/translate.c
@@ -51,7 +51,7 @@ typedef struct DisasContext {
    conditional executions state has been updated.  */
 #define DISAS_SYSCALL 5
 
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
 static TCGv_i32 cpu_R[32];
 
 /* FIXME:  These should be removed.  */
diff --git a/target-xtensa/translate.c b/target-xtensa/translate.c
index fbcec94..ce0f717 100644
--- a/target-xtensa/translate.c
+++ b/target-xtensa/translate.c
@@ -73,7 +73,7 @@ typedef struct DisasContext {
     unsigned cpenable;
 } DisasContext;
 
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
 static TCGv_i32 cpu_pc;
 static TCGv_i32 cpu_R[16];
 static TCGv_i32 cpu_FR[16];
diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h
index 6966672..8669d0b 100644
--- a/tcg/tcg-op.h
+++ b/tcg/tcg-op.h
@@ -756,7 +756,6 @@ static inline void tcg_gen_exit_tb(uintptr_t val)
 void tcg_gen_goto_tb(unsigned idx);
 
 #if TARGET_LONG_BITS == 32
-#define TCGv TCGv_i32
 #define TCGv_promise TCGv_promise_i32
 #define tcg_temp_new() tcg_temp_new_i32()
 #define tcg_global_reg_new tcg_global_reg_new_i32
@@ -769,7 +768,6 @@ void tcg_gen_goto_tb(unsigned idx);
 #define tcg_gen_qemu_ld_tl tcg_gen_qemu_ld_i32
 #define tcg_gen_qemu_st_tl tcg_gen_qemu_st_i32
 #else
-#define TCGv TCGv_i64
 #define TCGv_promise TCGv_promise_i64
 #define tcg_temp_new() tcg_temp_new_i64()
 #define tcg_global_reg_new tcg_global_reg_new_i64
diff --git a/tcg/tcg.h b/tcg/tcg.h
index 79e83c8..8bed171 100644
--- a/tcg/tcg.h
+++ b/tcg/tcg.h
@@ -311,6 +311,12 @@ typedef struct TCGv_ptr_d *TCGv_ptr;
 typedef struct TCGv_promise_i32_d *TCGv_promise_i32;
 typedef struct TCGv_promise_i64_d *TCGv_promise_i64;
 typedef struct TCGv_promise_ptr_d *TCGv_promise_ptr;
+typedef TCGv_ptr TCGv_cpu;
+#if TARGET_LONG_BITS == 32
+typedef TCGv_i32 TCGv;
+#else  /* TARGET_LONG_BITS == 64 */
+typedef TCGv_i64 TCGv;
+#endif
 
 static inline TCGv_i32 QEMU_ARTIFICIAL MAKE_TCGV_I32(intptr_t i)
 {
diff --git a/trace/control.h b/trace/control.h
index da9bb6b..766fdad 100644
--- a/trace/control.h
+++ b/trace/control.h
@@ -1,7 +1,7 @@
 /*
  * Interface for configuring and controlling the state of tracing events.
  *
- * Copyright (C) 2011-2014 Lluís Vilanova <vilanova@ac.upc.edu>
+ * Copyright (C) 2011-2016 Lluís Vilanova <vilanova@ac.upc.edu>
  *
  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  * See the COPYING file in the top-level directory.
@@ -11,6 +11,7 @@
 #define TRACE__CONTROL_H
 
 #include "qemu-common.h"
+#include "qemu/typedefs.h"
 #include "trace/generated-events.h"