tcg: Remove TCGContext.tlb_fast_offset

Now that there is no padding between CPUNegativeOffsetState and CPUArchState, this value is constant across all targets. Reviewed-by: Anton Johansson <anjo@rev.ng> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
qemu · Oct 3, 2023 · 59e9243 · 59e9243
1 parent 2709e69
commit 59e9243
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Showing 3 changed files with 9 additions and 9 deletions.
diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c
@@ -344,8 +344,6 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
     tcg_ctx->page_bits = TARGET_PAGE_BITS;
     tcg_ctx->page_mask = TARGET_PAGE_MASK;
     tcg_ctx->tlb_dyn_max_bits = CPU_TLB_DYN_MAX_BITS;
-    tcg_ctx->tlb_fast_offset = (int)offsetof(ArchCPU, parent_obj.neg.tlb.f)
-                             - (int)offsetof(ArchCPU, env);
 #endif
     tcg_ctx->insn_start_words = TARGET_INSN_START_WORDS;
 #ifdef TCG_GUEST_DEFAULT_MO

diff --git a/include/tcg/tcg.h b/include/tcg/tcg.h
@@ -489,7 +489,6 @@ struct TCGContext {
     TCGType addr_type;            /* TCG_TYPE_I32 or TCG_TYPE_I64 */
 
 #ifdef CONFIG_SOFTMMU
-    int tlb_fast_offset;
     int page_mask;
     uint8_t page_bits;
     uint8_t tlb_dyn_max_bits;

diff --git a/tcg/tcg.c b/tcg/tcg.c
@@ -406,7 +406,8 @@ static uintptr_t G_GNUC_UNUSED get_jmp_target_addr(TCGContext *s, int which)
 #if defined(CONFIG_SOFTMMU) && !defined(CONFIG_TCG_INTERPRETER)
 static int tlb_mask_table_ofs(TCGContext *s, int which)
 {
-    return s->tlb_fast_offset + which * sizeof(CPUTLBDescFast);
+    return (offsetof(CPUNegativeOffsetState, tlb.f[which]) -
+            sizeof(CPUNegativeOffsetState));
 }
 #endif
 
@@ -734,6 +735,13 @@ static const TCGTargetOpDef constraint_sets[] = {
 
 #include "tcg-target.c.inc"
 
+#ifndef CONFIG_TCG_INTERPRETER
+/* Validate CPUTLBDescFast placement. */
+QEMU_BUILD_BUG_ON((int)(offsetof(CPUNegativeOffsetState, tlb.f[0]) -
+                        sizeof(CPUNegativeOffsetState))
+                  < MIN_TLB_MASK_TABLE_OFS);
+#endif
+
 static void alloc_tcg_plugin_context(TCGContext *s)
 {
 #ifdef CONFIG_PLUGIN
@@ -1497,11 +1505,6 @@ void tcg_func_start(TCGContext *s)
     tcg_debug_assert(s->addr_type == TCG_TYPE_I32 ||
                      s->addr_type == TCG_TYPE_I64);
 
-#if defined(CONFIG_SOFTMMU) && !defined(CONFIG_TCG_INTERPRETER)
-    tcg_debug_assert(s->tlb_fast_offset < 0);
-    tcg_debug_assert(s->tlb_fast_offset >= MIN_TLB_MASK_TABLE_OFS);
-#endif
-
     tcg_debug_assert(s->insn_start_words > 0);
 }