[Qemu-devel] [PULL 01/42] exec: [tcg] Track which vCPU is performing translation and execution

[Stefan Hajnoczi <stefanha@redhat.com>]

From: Lluís Vilanova <vilanova@ac.upc.edu>

Information is tracked inside the TCGContext structure, and later used
by tracing events with the 'tcg' and 'vcpu' properties.

The 'cpu' field is used to check tracing of translation-time
events ("*_trans"). The 'tcg_env' field is used to pass it to
execution-time events ("*_exec").

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 146549350162.18437.3033661139638458143.stgit@fimbulvetr.bsc.es
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 target-alpha/translate.c      | 1 +
 target-arm/translate.c        | 1 +
 target-cris/translate.c       | 1 +
 target-cris/translate_v10.c   | 1 +
 target-i386/translate.c       | 1 +
 target-lm32/translate.c       | 1 +
 target-m68k/translate.c       | 1 +
 target-microblaze/translate.c | 1 +
 target-mips/translate.c       | 1 +
 target-moxie/translate.c      | 1 +
 target-openrisc/translate.c   | 1 +
 target-ppc/translate.c        | 1 +
 target-s390x/translate.c      | 1 +
 target-sh4/translate.c        | 1 +
 target-sparc/translate.c      | 1 +
 target-tilegx/translate.c     | 1 +
 target-tricore/translate.c    | 1 +
 target-unicore32/translate.c  | 1 +
 target-xtensa/translate.c     | 1 +
 tcg/tcg.h                     | 4 ++++
 translate-all.c               | 2 ++
 21 files changed, 25 insertions(+)

diff --git a/target-alpha/translate.c b/target-alpha/translate.c
index f9b2426..243567b 100644
--- a/target-alpha/translate.c
+++ b/target-alpha/translate.c
@@ -151,6 +151,7 @@ void alpha_translate_init(void)
     done_init = 1;
 
     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+    tcg_ctx.tcg_env = cpu_env;
 
     for (i = 0; i < 31; i++) {
         cpu_std_ir[i] = tcg_global_mem_new_i64(cpu_env,
diff --git a/target-arm/translate.c b/target-arm/translate.c
index 3e71467..bd5d5cb 100644
--- a/target-arm/translate.c
+++ b/target-arm/translate.c
@@ -85,6 +85,7 @@ void arm_translate_init(void)
     int i;
 
     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+    tcg_ctx.tcg_env = cpu_env;
 
     for (i = 0; i < 16; i++) {
         cpu_R[i] = tcg_global_mem_new_i32(cpu_env,
diff --git a/target-cris/translate.c b/target-cris/translate.c
index cc51569..f4a8d7d 100644
--- a/target-cris/translate.c
+++ b/target-cris/translate.c
@@ -3374,6 +3374,7 @@ void cris_initialize_tcg(void)
     int i;
 
     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+    tcg_ctx.tcg_env = cpu_env;
     cc_x = tcg_global_mem_new(cpu_env,
                               offsetof(CPUCRISState, cc_x), "cc_x");
     cc_src = tcg_global_mem_new(cpu_env,
diff --git a/target-cris/translate_v10.c b/target-cris/translate_v10.c
index 06ba1ef..4707a18 100644
--- a/target-cris/translate_v10.c
+++ b/target-cris/translate_v10.c
@@ -1250,6 +1250,7 @@ void cris_initialize_crisv10_tcg(void)
     int i;
 
     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+    tcg_ctx.tcg_env = cpu_env;
     cc_x = tcg_global_mem_new(cpu_env,
                               offsetof(CPUCRISState, cc_x), "cc_x");
     cc_src = tcg_global_mem_new(cpu_env,
diff --git a/target-i386/translate.c b/target-i386/translate.c
index f010022..7dea18b 100644
--- a/target-i386/translate.c
+++ b/target-i386/translate.c
@@ -8152,6 +8152,7 @@ void tcg_x86_init(void)
     initialized = true;
 
     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+    tcg_ctx.tcg_env = cpu_env;
     cpu_cc_op = tcg_global_mem_new_i32(cpu_env,
                                        offsetof(CPUX86State, cc_op), "cc_op");
     cpu_cc_dst = tcg_global_mem_new(cpu_env, offsetof(CPUX86State, cc_dst),
diff --git a/target-lm32/translate.c b/target-lm32/translate.c
index 526b437..2d8caeb 100644
--- a/target-lm32/translate.c
+++ b/target-lm32/translate.c
@@ -1202,6 +1202,7 @@ void lm32_translate_init(void)
     int i;
 
     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+    tcg_ctx.tcg_env = cpu_env;
 
     for (i = 0; i < ARRAY_SIZE(cpu_R); i++) {
         cpu_R[i] = tcg_global_mem_new(cpu_env,
diff --git a/target-m68k/translate.c b/target-m68k/translate.c
index 83db42a..ecd5e5c 100644
--- a/target-m68k/translate.c
+++ b/target-m68k/translate.c
@@ -78,6 +78,7 @@ void m68k_tcg_init(void)
     int i;
 
     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+    tcg_ctx.tcg_env = cpu_env;
 
 #define DEFO32(name, offset) \
     QREG_##name = tcg_global_mem_new_i32(cpu_env, \
diff --git a/target-microblaze/translate.c b/target-microblaze/translate.c
index c54304a..80098ec 100644
--- a/target-microblaze/translate.c
+++ b/target-microblaze/translate.c
@@ -1878,6 +1878,7 @@ void mb_tcg_init(void)
     int i;
 
     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+    tcg_ctx.tcg_env = cpu_env;
 
     env_debug = tcg_global_mem_new(cpu_env,
                     offsetof(CPUMBState, debug),
diff --git a/target-mips/translate.c b/target-mips/translate.c
index f420680..aaa1d02 100644
--- a/target-mips/translate.c
+++ b/target-mips/translate.c
@@ -20005,6 +20005,7 @@ void mips_tcg_init(void)
         return;
 
     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+    tcg_ctx.tcg_env = cpu_env;
 
     TCGV_UNUSED(cpu_gpr[0]);
     for (i = 1; i < 32; i++)
diff --git a/target-moxie/translate.c b/target-moxie/translate.c
index 58200c2..0660b44 100644
--- a/target-moxie/translate.c
+++ b/target-moxie/translate.c
@@ -106,6 +106,7 @@ void moxie_translate_init(void)
         return;
     }
     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+    tcg_ctx.tcg_env = cpu_env;
     cpu_pc = tcg_global_mem_new_i32(cpu_env,
                                     offsetof(CPUMoxieState, pc), "$pc");
     for (i = 0; i < 16; i++)
diff --git a/target-openrisc/translate.c b/target-openrisc/translate.c
index c08876b..28c9446 100644
--- a/target-openrisc/translate.c
+++ b/target-openrisc/translate.c
@@ -78,6 +78,7 @@ void openrisc_translate_init(void)
     int i;
 
     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+    tcg_ctx.tcg_env = cpu_env;
     cpu_sr = tcg_global_mem_new(cpu_env,
                                 offsetof(CPUOpenRISCState, sr), "sr");
     env_flags = tcg_global_mem_new_i32(cpu_env,
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index b689475..1280184 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -88,6 +88,7 @@ void ppc_translate_init(void)
         return;
 
     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+    tcg_ctx.tcg_env = cpu_env;
 
     p = cpu_reg_names;
     cpu_reg_names_size = sizeof(cpu_reg_names);
diff --git a/target-s390x/translate.c b/target-s390x/translate.c
index ce5db5d..3c3487a 100644
--- a/target-s390x/translate.c
+++ b/target-s390x/translate.c
@@ -169,6 +169,7 @@ void s390x_translate_init(void)
     int i;
 
     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+    tcg_ctx.tcg_env = cpu_env;
     psw_addr = tcg_global_mem_new_i64(cpu_env,
                                       offsetof(CPUS390XState, psw.addr),
                                       "psw_addr");
diff --git a/target-sh4/translate.c b/target-sh4/translate.c
index 7518eb5..ca80cf7 100644
--- a/target-sh4/translate.c
+++ b/target-sh4/translate.c
@@ -101,6 +101,7 @@ void sh4_translate_init(void)
         return;
 
     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+    tcg_ctx.tcg_env = cpu_env;
 
     for (i = 0; i < 24; i++)
         cpu_gregs[i] = tcg_global_mem_new_i32(cpu_env,
diff --git a/target-sparc/translate.c b/target-sparc/translate.c
index afd306f..afd46b8 100644
--- a/target-sparc/translate.c
+++ b/target-sparc/translate.c
@@ -5404,6 +5404,7 @@ void gen_intermediate_code_init(CPUSPARCState *env)
     inited = 1;
 
     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+    tcg_ctx.tcg_env = cpu_env;
 
     cpu_regwptr = tcg_global_mem_new_ptr(cpu_env,
                                          offsetof(CPUSPARCState, regwptr),
diff --git a/target-tilegx/translate.c b/target-tilegx/translate.c
index bdea673..11c9732 100644
--- a/target-tilegx/translate.c
+++ b/target-tilegx/translate.c
@@ -2443,6 +2443,7 @@ void tilegx_tcg_init(void)
     int i;
 
     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+    tcg_ctx.tcg_env = cpu_env;
     cpu_pc = tcg_global_mem_new_i64(cpu_env, offsetof(CPUTLGState, pc), "pc");
     for (i = 0; i < TILEGX_R_COUNT; i++) {
         cpu_regs[i] = tcg_global_mem_new_i64(cpu_env,
diff --git a/target-tricore/translate.c b/target-tricore/translate.c
index eb3deac..9a50df9 100644
--- a/target-tricore/translate.c
+++ b/target-tricore/translate.c
@@ -8835,6 +8835,7 @@ void tricore_tcg_init(void)
         return;
     }
     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+    tcg_ctx.tcg_env = cpu_env;
     /* reg init */
     for (i = 0 ; i < 16 ; i++) {
         cpu_gpr_a[i] = tcg_global_mem_new(cpu_env,
diff --git a/target-unicore32/translate.c b/target-unicore32/translate.c
index c4d45fa..09354f9 100644
--- a/target-unicore32/translate.c
+++ b/target-unicore32/translate.c
@@ -70,6 +70,7 @@ void uc32_translate_init(void)
     int i;
 
     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+    tcg_ctx.tcg_env = cpu_env;
 
     for (i = 0; i < 32; i++) {
         cpu_R[i] = tcg_global_mem_new_i32(cpu_env,
diff --git a/target-xtensa/translate.c b/target-xtensa/translate.c
index 2a8e5c5..4c1e487 100644
--- a/target-xtensa/translate.c
+++ b/target-xtensa/translate.c
@@ -219,6 +219,7 @@ void xtensa_translate_init(void)
     int i;
 
     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+    tcg_ctx.tcg_env = cpu_env;
     cpu_pc = tcg_global_mem_new_i32(cpu_env,
             offsetof(CPUXtensaState, pc), "pc");
 
diff --git a/tcg/tcg.h b/tcg/tcg.h
index 909db3f..66d7fc0 100644
--- a/tcg/tcg.h
+++ b/tcg/tcg.h
@@ -599,6 +599,10 @@ struct TCGContext {
 
     TBContext tb_ctx;
 
+    /* Track which vCPU triggers events */
+    CPUState *cpu;                      /* *_trans */
+    TCGv_env tcg_env;                   /* *_exec  */
+
     /* The TCGBackendData structure is private to tcg-target.inc.c.  */
     struct TCGBackendData *be;
 
diff --git a/translate-all.c b/translate-all.c
index 3f402df..eaa95e4 100644
--- a/translate-all.c
+++ b/translate-all.c
@@ -1182,7 +1182,9 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
 
     tcg_func_start(&tcg_ctx);
 
+    tcg_ctx.cpu = ENV_GET_CPU(env);
     gen_intermediate_code(env, tb);
+    tcg_ctx.cpu = NULL;
 
     trace_translate_block(tb, tb->pc, tb->tc_ptr);
 
-- 
2.5.5