[Qemu-devel] [PATCH 15/17] ppc: Add dummy POWER8 MPPR register

[Cédric Le Goater]

From: Benjamin Herrenschmidt <address@hidden>

Controls the micropartition prefetch, this is pretty much meaningless
in full emulation (used for priming the caches on real HW).

Signed-off-by: Benjamin Herrenschmidt <address@hidden>
---
 target-ppc/cpu.h            |  1 +
 target-ppc/translate_init.c | 13 +++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h
index 81a3e6b5ed29..5203cc6a3bfb 100644
--- a/target-ppc/cpu.h
+++ b/target-ppc/cpu.h
@@ -1398,6 +1398,7 @@ static inline int cpu_mmu_index (CPUPPCState *env, bool 
ifetch)
 #define SPR_DHDES             (0x0B1)
 #define SPR_DPDES             (0x0B0)
 #define SPR_DAWR              (0x0B4)
+#define SPR_MPPR              (0x0B8)
 #define SPR_RPR               (0x0BA)
 #define SPR_DAWRX             (0x0BC)
 #define SPR_HFSCR             (0x0BE)
diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
index 28a9c2e73156..cfb1bc088950 100644
--- a/target-ppc/translate_init.c
+++ b/target-ppc/translate_init.c
@@ -8161,6 +8161,18 @@ static void gen_spr_power8_ic(CPUPPCState *env)
 #endif
 }
 
+static void gen_spr_power8_book4(CPUPPCState *env)
+{
+    /* Add a number of P8 book4 registers */
+#if !defined(CONFIG_USER_ONLY)
+    spr_register_hv(env, SPR_MPPR, "MPPR",
+                    SPR_NOACCESS, SPR_NOACCESS,
+                    &spr_read_generic, SPR_NOACCESS,
+                    &spr_read_generic, &spr_write_generic,
+                    0);
+#endif
+}
+
 static void init_proc_book3s_64(CPUPPCState *env, int version)
 {
     gen_spr_ne_601(env);
@@ -8216,6 +8228,7 @@ static void init_proc_book3s_64(CPUPPCState *env, int 
version)
         gen_spr_power8_rpr(env);
         gen_spr_power8_dbell(env);
         gen_spr_power8_ic(env);
+        gen_spr_power8_book4(env);
     }
     if (version < BOOK3S_CPU_POWER8) {
         gen_spr_book3s_dbg(env);
-- 
2.1.4