[Qemu-ppc] [PATCH v4 27/29] target-ppc: Enable DABRX SPR and limit it to <=POWER7

[Alexey Kardashevskiy]

This adds DABRX SPR.

As DABR(X) are present in POWER CPUs till POWER7 only and POWER8 does not
have them (as it implements more powerful facility instead), this limits
DABR/DABRX registration by POWER7 (inclusive).

Signed-off-by: Alexey Kardashevskiy <address@hidden>
---
 target-ppc/translate_init.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
index 237074d..2c076b0 100644
--- a/target-ppc/translate_init.c
+++ b/target-ppc/translate_init.c
@@ -7415,6 +7415,11 @@ static void gen_spr_book3s_dbg(CPUPPCState *env)
                      SPR_NOACCESS, SPR_NOACCESS,
                      &spr_read_generic, &spr_write_generic,
                      KVM_REG_PPC_DABR, 0x00000000);
+
+    spr_register_kvm(env, SPR_DABRX, "DABRX",
+                     SPR_NOACCESS, SPR_NOACCESS,
+                     SPR_NOACCESS, SPR_NOACCESS,
+                     KVM_REG_PPC_DABRX, 0x00000000);
 }
 
 static void gen_spr_970_dbg(CPUPPCState *env)
@@ -7784,7 +7789,6 @@ static void init_proc_book3s_64(CPUPPCState *env, int 
version)
     gen_spr_book3s_altivec(env);
     gen_spr_book3s_pmu_hypv(env);
     gen_spr_book3s_pmu_user(env);
-    gen_spr_book3s_dbg(env);
     gen_spr_book3s_common(env);
 
     switch (version) {
@@ -7827,6 +7831,9 @@ static void init_proc_book3s_64(CPUPPCState *env, int 
version)
         gen_spr_power8_pmu_user(env);
         gen_spr_power8_tm(env);
     }
+    if (version < BOOK3S_CPU_POWER8) {
+        gen_spr_book3s_dbg(env);
+    }
 #if !defined(CONFIG_USER_ONLY)
     switch (version) {
     case BOOK3S_CPU_970:
-- 
2.0.0