[PATCH 21/26] target/ppc: add helper to write per-LPAR SPRs

[Nicholas Piggin]

An SPR can be either per-thread, per-core, or per-LPAR. Per-LPAR means
per-thread or per-core, depending on 1LPAR mode.

Signed-off-by: Nicholas Piggin <npig...@gmail.com>
---
 target/ppc/spr_common.h |  2 ++
 target/ppc/translate.c  | 26 ++++++++++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/target/ppc/spr_common.h b/target/ppc/spr_common.h
index 9e40b3b608..85f73b860b 100644
--- a/target/ppc/spr_common.h
+++ b/target/ppc/spr_common.h
@@ -83,6 +83,8 @@ void spr_read_generic(DisasContext *ctx, int gprn, int sprn);
 void spr_write_generic(DisasContext *ctx, int sprn, int gprn);
 void spr_write_generic32(DisasContext *ctx, int sprn, int gprn);
 void spr_core_write_generic(DisasContext *ctx, int sprn, int gprn);
+void spr_core_write_generic32(DisasContext *ctx, int sprn, int gprn);
+void spr_core_lpar_write_generic(DisasContext *ctx, int sprn, int gprn);
 void spr_write_MMCR0(DisasContext *ctx, int sprn, int gprn);
 void spr_write_MMCR1(DisasContext *ctx, int sprn, int gprn);
 void spr_write_MMCRA(DisasContext *ctx, int sprn, int gprn);
diff --git a/target/ppc/translate.c b/target/ppc/translate.c
index c5089f90f6..e7749d9b32 100644
--- a/target/ppc/translate.c
+++ b/target/ppc/translate.c
@@ -472,6 +472,32 @@ void spr_core_write_generic(DisasContext *ctx, int sprn, 
int gprn)
     spr_store_dump_spr(sprn);
 }
 
+void spr_core_write_generic32(DisasContext *ctx, int sprn, int gprn)
+{
+    TCGv t0 = tcg_temp_new();
+    if (!(ctx->flags & POWERPC_FLAG_SMT)) {
+        spr_write_generic32(ctx, sprn, gprn);
+        return;
+    }
+
+    if (!gen_serialize(ctx)) {
+        return;
+    }
+
+    tcg_gen_ext32u_tl(t0, cpu_gpr[gprn]);
+    gen_helper_spr_core_write_generic(tcg_env, tcg_constant_i32(sprn), t0);
+    spr_store_dump_spr(sprn);
+}
+
+void spr_core_lpar_write_generic(DisasContext *ctx, int sprn, int gprn)
+{
+    if (ctx->flags & POWERPC_FLAG_SMT_1LPAR) {
+        spr_core_write_generic(ctx, sprn, gprn);
+    } else {
+        spr_write_generic(ctx, sprn, gprn);
+    }
+}
+
 static void spr_write_CTRL_ST(DisasContext *ctx, int sprn, int gprn)
 {
     /* This does not implement >1 thread */
-- 
2.42.0