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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Cc: "Luis Pires" <luis.pires@eldorado.org.br>,
	"Alex Bennée" <alex.bennee@linaro.org>,
	"Philippe Mathieu-Daudé" <f4bug@amsat.org>
Subject: [PULL 15/34] tcg: Introduce tcg_max_ctxs
Date: Fri, 11 Jun 2021 16:41:25 -0700	[thread overview]
Message-ID: <20210611234144.653682-16-richard.henderson@linaro.org> (raw)
In-Reply-To: <20210611234144.653682-1-richard.henderson@linaro.org>

Finish the divorce of tcg/ from hw/, and do not take
the max cpu value from MachineState; just remember what
we were passed in tcg_init.

Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/tcg-internal.h |  3 ++-
 tcg/region.c       |  6 +++---
 tcg/tcg.c          | 23 ++++++++++-------------
 3 files changed, 15 insertions(+), 17 deletions(-)

diff --git a/tcg/tcg-internal.h b/tcg/tcg-internal.h
index fcfeca232f..f9906523da 100644
--- a/tcg/tcg-internal.h
+++ b/tcg/tcg-internal.h
@@ -28,7 +28,8 @@
 #define TCG_HIGHWATER 1024
 
 extern TCGContext **tcg_ctxs;
-extern unsigned int n_tcg_ctxs;
+extern unsigned int tcg_cur_ctxs;
+extern unsigned int tcg_max_ctxs;
 
 void tcg_region_init(size_t tb_size, int splitwx, unsigned max_cpus);
 bool tcg_region_alloc(TCGContext *s);
diff --git a/tcg/region.c b/tcg/region.c
index 877baf16f5..57069a38ff 100644
--- a/tcg/region.c
+++ b/tcg/region.c
@@ -347,7 +347,7 @@ void tcg_region_initial_alloc(TCGContext *s)
 /* Call from a safe-work context */
 void tcg_region_reset_all(void)
 {
-    unsigned int n_ctxs = qatomic_read(&n_tcg_ctxs);
+    unsigned int n_ctxs = qatomic_read(&tcg_cur_ctxs);
     unsigned int i;
 
     qemu_mutex_lock(&region.lock);
@@ -934,7 +934,7 @@ void tcg_region_prologue_set(TCGContext *s)
  */
 size_t tcg_code_size(void)
 {
-    unsigned int n_ctxs = qatomic_read(&n_tcg_ctxs);
+    unsigned int n_ctxs = qatomic_read(&tcg_cur_ctxs);
     unsigned int i;
     size_t total;
 
@@ -970,7 +970,7 @@ size_t tcg_code_capacity(void)
 
 size_t tcg_tb_phys_invalidate_count(void)
 {
-    unsigned int n_ctxs = qatomic_read(&n_tcg_ctxs);
+    unsigned int n_ctxs = qatomic_read(&tcg_cur_ctxs);
     unsigned int i;
     size_t total = 0;
 
diff --git a/tcg/tcg.c b/tcg/tcg.c
index 5cc384e205..9880d5205e 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -43,11 +43,6 @@
 #define NO_CPU_IO_DEFS
 
 #include "exec/exec-all.h"
-
-#if !defined(CONFIG_USER_ONLY)
-#include "hw/boards.h"
-#endif
-
 #include "tcg/tcg-op.h"
 
 #if UINTPTR_MAX == UINT32_MAX
@@ -155,7 +150,8 @@ static int tcg_out_ldst_finalize(TCGContext *s);
 #endif
 
 TCGContext **tcg_ctxs;
-unsigned int n_tcg_ctxs;
+unsigned int tcg_cur_ctxs;
+unsigned int tcg_max_ctxs;
 TCGv_env cpu_env = 0;
 const void *tcg_code_gen_epilogue;
 uintptr_t tcg_splitwx_diff;
@@ -475,7 +471,6 @@ void tcg_register_thread(void)
 #else
 void tcg_register_thread(void)
 {
-    MachineState *ms = MACHINE(qdev_get_machine());
     TCGContext *s = g_malloc(sizeof(*s));
     unsigned int i, n;
 
@@ -491,8 +486,8 @@ void tcg_register_thread(void)
     }
 
     /* Claim an entry in tcg_ctxs */
-    n = qatomic_fetch_inc(&n_tcg_ctxs);
-    g_assert(n < ms->smp.max_cpus);
+    n = qatomic_fetch_inc(&tcg_cur_ctxs);
+    g_assert(n < tcg_max_ctxs);
     qatomic_set(&tcg_ctxs[n], s);
 
     if (n > 0) {
@@ -643,9 +638,11 @@ static void tcg_context_init(unsigned max_cpus)
      */
 #ifdef CONFIG_USER_ONLY
     tcg_ctxs = &tcg_ctx;
-    n_tcg_ctxs = 1;
+    tcg_cur_ctxs = 1;
+    tcg_max_ctxs = 1;
 #else
-    tcg_ctxs = g_new(TCGContext *, max_cpus);
+    tcg_max_ctxs = max_cpus;
+    tcg_ctxs = g_new0(TCGContext *, max_cpus);
 #endif
 
     tcg_debug_assert(!tcg_regset_test_reg(s->reserved_regs, TCG_AREG0));
@@ -3937,7 +3934,7 @@ static void tcg_reg_alloc_call(TCGContext *s, TCGOp *op)
 static inline
 void tcg_profile_snapshot(TCGProfile *prof, bool counters, bool table)
 {
-    unsigned int n_ctxs = qatomic_read(&n_tcg_ctxs);
+    unsigned int n_ctxs = qatomic_read(&tcg_cur_ctxs);
     unsigned int i;
 
     for (i = 0; i < n_ctxs; i++) {
@@ -4000,7 +3997,7 @@ void tcg_dump_op_count(void)
 
 int64_t tcg_cpu_exec_time(void)
 {
-    unsigned int n_ctxs = qatomic_read(&n_tcg_ctxs);
+    unsigned int n_ctxs = qatomic_read(&tcg_cur_ctxs);
     unsigned int i;
     int64_t ret = 0;
 
-- 
2.25.1



  parent reply	other threads:[~2021-06-11 23:50 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-11 23:41 [PULL 00/34] tcg patch queue Richard Henderson
2021-06-11 23:41 ` [PULL 01/34] meson: Split out tcg/meson.build Richard Henderson
2021-06-11 23:41 ` [PULL 02/34] meson: Split out fpu/meson.build Richard Henderson
2021-06-11 23:41 ` [PULL 03/34] tcg: Re-order tcg_region_init vs tcg_prologue_init Richard Henderson
2021-06-14 14:36   ` Christian Borntraeger
2021-06-11 23:41 ` [PULL 04/34] tcg: Remove error return from tcg_region_initial_alloc__locked Richard Henderson
2021-06-11 23:41 ` [PULL 05/34] tcg: Split out tcg_region_initial_alloc Richard Henderson
2021-06-11 23:41 ` [PULL 06/34] tcg: Split out tcg_region_prologue_set Richard Henderson
2021-06-11 23:41 ` [PULL 07/34] tcg: Split out region.c Richard Henderson
2021-06-11 23:41 ` [PULL 08/34] accel/tcg: Inline cpu_gen_init Richard Henderson
2021-06-11 23:41 ` [PULL 09/34] accel/tcg: Move alloc_code_gen_buffer to tcg/region.c Richard Henderson
2021-06-11 23:41 ` [PULL 10/34] accel/tcg: Rename tcg_init to tcg_init_machine Richard Henderson
2021-06-11 23:41 ` [PULL 11/34] tcg: Create tcg_init Richard Henderson
2021-06-11 23:41 ` [PULL 12/34] accel/tcg: Merge tcg_exec_init into tcg_init_machine Richard Henderson
2021-06-11 23:41 ` [PULL 13/34] accel/tcg: Use MiB in tcg_init_machine Richard Henderson
2021-06-11 23:41 ` [PULL 14/34] accel/tcg: Pass down max_cpus to tcg_init Richard Henderson
2021-06-11 23:41 ` Richard Henderson [this message]
2021-06-11 23:41 ` [PULL 16/34] tcg: Move MAX_CODE_GEN_BUFFER_SIZE to tcg-target.h Richard Henderson
2021-06-11 23:41 ` [PULL 17/34] tcg: Replace region.end with region.total_size Richard Henderson
2021-06-11 23:41 ` [PULL 18/34] tcg: Rename region.start to region.after_prologue Richard Henderson
2021-06-11 23:41 ` [PULL 19/34] tcg: Tidy tcg_n_regions Richard Henderson
2021-06-11 23:41 ` [PULL 20/34] tcg: Tidy split_cross_256mb Richard Henderson
2021-06-11 23:41 ` [PULL 21/34] tcg: Move in_code_gen_buffer and tests to region.c Richard Henderson
2021-06-11 23:41 ` [PULL 22/34] tcg: Allocate code_gen_buffer into struct tcg_region_state Richard Henderson
2021-06-11 23:41 ` [PULL 23/34] tcg: Return the map protection from alloc_code_gen_buffer Richard Henderson
2021-06-11 23:41 ` [PULL 24/34] tcg: Sink qemu_madvise call to common code Richard Henderson
2021-06-11 23:41 ` [PULL 25/34] util/osdep: Add qemu_mprotect_rw Richard Henderson
2021-06-11 23:41 ` [PULL 26/34] tcg: Round the tb_size default from qemu_get_host_physmem Richard Henderson
2021-06-11 23:41 ` [PULL 27/34] tcg: Merge buffer protection and guard page protection Richard Henderson
2021-06-11 23:41 ` [PULL 28/34] tcg: When allocating for !splitwx, begin with PROT_NONE Richard Henderson
2021-06-11 23:41 ` [PULL 29/34] tcg: Move tcg_init_ctx and tcg_ctx from accel/tcg/ Richard Henderson
2021-06-11 23:41 ` [PULL 30/34] tcg: Introduce tcg_remove_ops_after Richard Henderson
2021-06-11 23:41 ` [PULL 31/34] tcg: Fix documentation for tcg_constant_* vs tcg_temp_free_* Richard Henderson
2021-06-11 23:41 ` [PULL 32/34] tcg/arm: Fix tcg_out_op function signature Richard Henderson
2021-06-11 23:41 ` [PULL 33/34] softfloat: Fix tp init in float32_exp2 Richard Henderson
2021-06-11 23:41 ` [PULL 34/34] docs/devel: Explain in more detail the TB chaining mechanisms Richard Henderson
2021-06-13 15:13 ` [PULL 00/34] tcg patch queue Peter Maydell
2021-06-13 17:10   ` Peter Maydell
2021-06-14  1:37     ` Richard Henderson
2021-06-14  9:28       ` Peter Maydell
2021-06-14  9:35       ` Alex Bennée
2021-06-14 15:00         ` Philippe Mathieu-Daudé

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