[Qemu-devel] [PATCH 08/17] ppc: Add placeholder SPRs for DPDES and DHDES on P8

[Cédric Le Goater]

From: Benjamin Herrenschmidt <address@hidden>

We still need to eventually implement doorbells but at least this
makes us not crash when the SPRs are accessed.

Signed-off-by: Benjamin Herrenschmidt <address@hidden>
---
 target-ppc/cpu.h            |  2 ++
 target-ppc/translate_init.c | 17 +++++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h
index 02aed6427ade..779cb57bd700 100644
--- a/target-ppc/cpu.h
+++ b/target-ppc/cpu.h
@@ -1394,6 +1394,8 @@ static inline int cpu_mmu_index (CPUPPCState *env, bool 
ifetch)
 #define SPR_MPC_ICTRL         (0x09E)
 #define SPR_MPC_BAR           (0x09F)
 #define SPR_PSPB              (0x09F)
+#define SPR_DHDES             (0x0B1)
+#define SPR_DPDES             (0x0B0)
 #define SPR_DAWR              (0x0B4)
 #define SPR_RPR               (0x0BA)
 #define SPR_DAWRX             (0x0BC)
diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
index 59a68de0bce8..7a399b97bc6f 100644
--- a/target-ppc/translate_init.c
+++ b/target-ppc/translate_init.c
@@ -8036,6 +8036,22 @@ static void gen_spr_power8_rpr(CPUPPCState *env)
 #endif
 }
 
+static void gen_spr_power8_dbell(CPUPPCState *env)
+{
+#if !defined(CONFIG_USER_ONLY)
+    spr_register_hv(env, SPR_DPDES, "DPDES",
+                    SPR_NOACCESS, SPR_NOACCESS,
+                    &spr_read_generic, SPR_NOACCESS,
+                    &spr_read_generic, &spr_write_generic,
+                    0);
+    spr_register_hv(env, SPR_DHDES, "DHDES",
+                    SPR_NOACCESS, SPR_NOACCESS,
+                    SPR_NOACCESS, 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);
@@ -8089,6 +8105,7 @@ static void init_proc_book3s_64(CPUPPCState *env, int 
version)
         gen_spr_power8_pspb(env);
         gen_spr_vtb(env);
         gen_spr_power8_rpr(env);
+        gen_spr_power8_dbell(env);
     }
     if (version < BOOK3S_CPU_POWER8) {
         gen_spr_book3s_dbg(env);
-- 
2.1.4