[PULL 22/41] target/ppc: Move sleep & friends to decodetree

[Harsh Prateek Bora <harshpb@linux.ibm.com>]

From: Ojaswin Mujoo <ojaswin@linux.ibm.com>

Convert the following instructions to decode tree specification:

doze
nap
sleep
rvwinkle
stop

The functionality was tested by comparing the qemu -D log -d op,in_asm
output as well as single stepping gdb to confirm behavior was not
changed for ISA3.x (stop) as well as ISA206 (doze, nap, sleep,
rvwinkle).

Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Reviewed-by: Glenn Miles <milesg@linux.ibm.com>
Reviewed-by: Amit Machhiwal <amachhiw@linux.ibm.com>
Signed-off-by: Chinmay Rath <rathc@linux.ibm.com>
Tested-by: Aniket Sahu <asahu1x@linux.ibm.com>
Link: https://lore.kernel.org/qemu-devel/20260827133010.278889-19-rathc@linux.ibm.com
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
---
 target/ppc/insn32.decode                      |   8 ++
 target/ppc/translate.c                        |  85 ---------------
 .../ppc/translate/processor-ctrl-impl.c.inc   | 100 ++++++++++++++++++
 3 files changed, 108 insertions(+), 85 deletions(-)

diff --git a/target/ppc/insn32.decode b/target/ppc/insn32.decode
index da32ac1d28..b833244932 100644
--- a/target/ppc/insn32.decode
+++ b/target/ppc/insn32.decode
@@ -913,6 +913,14 @@ VPERMR          000100 ..... ..... ..... ..... 111011   @VA
 
 VSEL            000100 ..... ..... ..... ..... 101010   @VA
 
+## Power Management Instructions
+
+DOZE            010011 ----- ----- ----- 0110010010 -
+NAP             010011 ----- ----- ----- 0110110010 -
+SLEEP           010011 ----- ----- ----- 0111010010 -
+RVWINKLE        010011 ----- ----- ----- 0111110010 -
+STOP            010011 ----- ----- ----- 0101110010 -
+
 ## Vector Integer Shift Instruction
 
 VSLB            000100 ..... ..... ..... 00100000100    @VX
diff --git a/target/ppc/translate.c b/target/ppc/translate.c
index e5ed4d2cc4..9d9823f92d 100644
--- a/target/ppc/translate.c
+++ b/target/ppc/translate.c
@@ -2728,86 +2728,6 @@ static inline void gen_check_tlb_flush(DisasContext *ctx, bool global) { }
 #endif
 
 #if defined(TARGET_PPC64)
-static void gen_doze(DisasContext *ctx)
-{
-#if defined(CONFIG_USER_ONLY)
-    GEN_PRIV(ctx);
-#else
-    TCGv_i32 t;
-
-    CHK_HV(ctx);
-    translator_io_start(&ctx->base);
-    t = tcg_constant_i32(PPC_PM_DOZE);
-    gen_helper_pminsn(tcg_env, t);
-    /* Stop translation, as the CPU is supposed to sleep from now */
-    gen_exception_nip(ctx, EXCP_HLT, ctx->base.pc_next);
-#endif /* defined(CONFIG_USER_ONLY) */
-}
-
-static void gen_nap(DisasContext *ctx)
-{
-#if defined(CONFIG_USER_ONLY)
-    GEN_PRIV(ctx);
-#else
-    TCGv_i32 t;
-
-    CHK_HV(ctx);
-    translator_io_start(&ctx->base);
-    t = tcg_constant_i32(PPC_PM_NAP);
-    gen_helper_pminsn(tcg_env, t);
-    /* Stop translation, as the CPU is supposed to sleep from now */
-    gen_exception_nip(ctx, EXCP_HLT, ctx->base.pc_next);
-#endif /* defined(CONFIG_USER_ONLY) */
-}
-
-static void gen_stop(DisasContext *ctx)
-{
-#if defined(CONFIG_USER_ONLY)
-    GEN_PRIV(ctx);
-#else
-    TCGv_i32 t;
-
-    CHK_HV(ctx);
-    translator_io_start(&ctx->base);
-    t = tcg_constant_i32(PPC_PM_STOP);
-    gen_helper_pminsn(tcg_env, t);
-    /* Stop translation, as the CPU is supposed to sleep from now */
-    gen_exception_nip(ctx, EXCP_HLT, ctx->base.pc_next);
-#endif /* defined(CONFIG_USER_ONLY) */
-}
-
-static void gen_sleep(DisasContext *ctx)
-{
-#if defined(CONFIG_USER_ONLY)
-    GEN_PRIV(ctx);
-#else
-    TCGv_i32 t;
-
-    CHK_HV(ctx);
-    translator_io_start(&ctx->base);
-    t = tcg_constant_i32(PPC_PM_SLEEP);
-    gen_helper_pminsn(tcg_env, t);
-    /* Stop translation, as the CPU is supposed to sleep from now */
-    gen_exception_nip(ctx, EXCP_HLT, ctx->base.pc_next);
-#endif /* defined(CONFIG_USER_ONLY) */
-}
-
-static void gen_rvwinkle(DisasContext *ctx)
-{
-#if defined(CONFIG_USER_ONLY)
-    GEN_PRIV(ctx);
-#else
-    TCGv_i32 t;
-
-    CHK_HV(ctx);
-    translator_io_start(&ctx->base);
-    t = tcg_constant_i32(PPC_PM_RVWINKLE);
-    gen_helper_pminsn(tcg_env, t);
-    /* Stop translation, as the CPU is supposed to sleep from now */
-    gen_exception_nip(ctx, EXCP_HLT, ctx->base.pc_next);
-#endif /* defined(CONFIG_USER_ONLY) */
-}
-
 static inline TCGv gen_write_bhrb(TCGv_ptr base, TCGv offset, TCGv mask, TCGv value)
 {
     TCGv_ptr tmp = tcg_temp_new_ptr();
@@ -5104,11 +5024,6 @@ GEN_HANDLER_E(scv, 0x11, 0x10, 0xFF, 0x03FFF01E, PPC_NONE, PPC2_ISA300),
 GEN_HANDLER_E(scv, 0x11, 0x00, 0xFF, 0x03FFF01E, PPC_NONE, PPC2_ISA300),
 GEN_HANDLER_E(rfscv, 0x13, 0x12, 0x02, 0x03FF8001, PPC_NONE, PPC2_ISA300),
 #endif
-GEN_HANDLER_E(stop, 0x13, 0x12, 0x0b, 0x03FFF801, PPC_NONE, PPC2_ISA300),
-GEN_HANDLER_E(doze, 0x13, 0x12, 0x0c, 0x03FFF801, PPC_NONE, PPC2_PM_ISA206),
-GEN_HANDLER_E(nap, 0x13, 0x12, 0x0d, 0x03FFF801, PPC_NONE, PPC2_PM_ISA206),
-GEN_HANDLER_E(sleep, 0x13, 0x12, 0x0e, 0x03FFF801, PPC_NONE, PPC2_PM_ISA206),
-GEN_HANDLER_E(rvwinkle, 0x13, 0x12, 0x0f, 0x03FFF801, PPC_NONE, PPC2_PM_ISA206),
 GEN_HANDLER(hrfid, 0x13, 0x12, 0x08, 0x03FF8001, PPC_64H),
 #endif
 /* Top bit of opc2 corresponds with low bit of LEV, so use two handlers */
diff --git a/target/ppc/translate/processor-ctrl-impl.c.inc b/target/ppc/translate/processor-ctrl-impl.c.inc
index 8abbb89630..a96c9c87ce 100644
--- a/target/ppc/translate/processor-ctrl-impl.c.inc
+++ b/target/ppc/translate/processor-ctrl-impl.c.inc
@@ -103,3 +103,103 @@ static bool trans_MSGSYNC(DisasContext *ctx, arg_MSGSYNC *a)
     /* interpreted as no-op */
     return true;
 }
+
+static bool do_doze(DisasContext *ctx, arg_DOZE *a)
+{
+    REQUIRE_64BIT(ctx);
+
+#if defined(CONFIG_USER_ONLY)
+    gen_priv_opc(ctx);
+#else
+    TCGv_i32 t;
+
+    REQUIRE_HV(ctx);
+    translator_io_start(&ctx->base);
+    t = tcg_constant_i32(PPC_PM_DOZE);
+    gen_helper_pminsn(tcg_env, t);
+    /* Stop translation, as the CPU is supposed to sleep from now */
+    gen_exception_nip(ctx, EXCP_HLT, ctx->base.pc_next);
+#endif /* defined(CONFIG_USER_ONLY) */
+    return true;
+}
+TRANS_FLAGS2(PM_ISA206, DOZE, do_doze);
+
+static bool do_nap(DisasContext *ctx, arg_NAP *a)
+{
+    REQUIRE_64BIT(ctx);
+
+#if defined(CONFIG_USER_ONLY)
+    gen_priv_opc(ctx);
+#else
+    TCGv_i32 t;
+
+    REQUIRE_HV(ctx);
+    translator_io_start(&ctx->base);
+    t = tcg_constant_i32(PPC_PM_NAP);
+    gen_helper_pminsn(tcg_env, t);
+    /* Stop translation, as the CPU is supposed to sleep from now */
+    gen_exception_nip(ctx, EXCP_HLT, ctx->base.pc_next);
+#endif /* defined(CONFIG_USER_ONLY) */
+    return true;
+}
+TRANS_FLAGS2(PM_ISA206, NAP, do_nap);
+
+static bool do_sleep(DisasContext *ctx, arg_SLEEP *a)
+{
+    REQUIRE_64BIT(ctx);
+
+#if defined(CONFIG_USER_ONLY)
+    gen_priv_opc(ctx);
+#else
+    TCGv_i32 t;
+
+    REQUIRE_HV(ctx);
+    translator_io_start(&ctx->base);
+    t = tcg_constant_i32(PPC_PM_SLEEP);
+    gen_helper_pminsn(tcg_env, t);
+    /* Stop translation, as the CPU is supposed to sleep from now */
+    gen_exception_nip(ctx, EXCP_HLT, ctx->base.pc_next);
+#endif /* defined(CONFIG_USER_ONLY) */
+    return true;
+}
+TRANS_FLAGS2(PM_ISA206, SLEEP, do_sleep);
+
+static bool do_rvwinkle(DisasContext *ctx, arg_RVWINKLE *a)
+{
+    REQUIRE_64BIT(ctx);
+
+#if defined(CONFIG_USER_ONLY)
+    gen_priv_opc(ctx);
+#else
+    TCGv_i32 t;
+
+    REQUIRE_HV(ctx);
+    translator_io_start(&ctx->base);
+    t = tcg_constant_i32(PPC_PM_RVWINKLE);
+    gen_helper_pminsn(tcg_env, t);
+    /* Stop translation, as the CPU is supposed to sleep from now */
+    gen_exception_nip(ctx, EXCP_HLT, ctx->base.pc_next);
+#endif /* defined(CONFIG_USER_ONLY) */
+    return true;
+}
+TRANS_FLAGS2(PM_ISA206, RVWINKLE, do_rvwinkle);
+
+static bool do_stop(DisasContext *ctx, arg_STOP *a)
+{
+    REQUIRE_64BIT(ctx);
+
+#if defined(CONFIG_USER_ONLY)
+    gen_priv_opc(ctx);
+#else
+    TCGv_i32 t;
+
+    REQUIRE_HV(ctx);
+    translator_io_start(&ctx->base);
+    t = tcg_constant_i32(PPC_PM_STOP);
+    gen_helper_pminsn(tcg_env, t);
+    /* Stop translation, as the CPU is supposed to sleep from now */
+    gen_exception_nip(ctx, EXCP_HLT, ctx->base.pc_next);
+#endif /* defined(CONFIG_USER_ONLY) */
+    return true;
+}
+TRANS_FLAGS2(ISA300, STOP, do_stop);
-- 
2.52.0