[Qemu-devel] [PATCH 69/77] ppc: Add dummy POWER8 PSPB SPR

[Benjamin Herrenschmidt]

On real hardware it allows temporary thread priority boosts, we don't
do threads and implementing it would be fairly tricky, so we just dummy
it or now.

Signed-off-by: Benjamin Herrenschmidt <address@hidden>
---
 target-ppc/cpu.h            |  1 +
 target-ppc/translate_init.c | 11 +++++++++++
 2 files changed, 12 insertions(+)

diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h
index 253d04b..334fcfe 100644
--- a/target-ppc/cpu.h
+++ b/target-ppc/cpu.h
@@ -1396,6 +1396,7 @@ static inline int cpu_mmu_index (CPUPPCState *env, bool 
ifetch)
 #define SPR_UAMOR             (0x09D)
 #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)
diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
index a178696..b1eba73 100644
--- a/target-ppc/translate_init.c
+++ b/target-ppc/translate_init.c
@@ -8224,6 +8224,16 @@ static void gen_spr_power8_book4(CPUPPCState *env)
 #endif
 }
 
+static void gen_spr_power8_pspb(CPUPPCState *env)
+{
+#if !defined(CONFIG_USER_ONLY)
+    spr_register(env, SPR_PSPB, "PSPB",
+                 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);
@@ -8278,6 +8288,7 @@ 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_pspb(env);
         gen_spr_power8_book4(env);
     }
     if (version < BOOK3S_CPU_POWER8) {
-- 
2.5.0