[Qemu-ppc] [PATCH 06/10] target/ppc: Add POWER9 exception model

[Cédric Le Goater]

From: Benjamin Herrenschmidt <address@hidden>

And use it to get the correct HILE bit in HID0

Signed-off-by: Benjamin Herrenschmidt <address@hidden>
Signed-off-by: Cédric Le Goater <address@hidden>
Reviewed-by: David Gibson <address@hidden>
---
 target/ppc/cpu-qom.h            |  2 ++
 target/ppc/excp_helper.c        | 17 +++++++++++++----
 target/ppc/translate.c          |  3 ++-
 target/ppc/translate_init.inc.c |  2 +-
 4 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/target/ppc/cpu-qom.h b/target/ppc/cpu-qom.h
index e9cb15842387..904ee694ac40 100644
--- a/target/ppc/cpu-qom.h
+++ b/target/ppc/cpu-qom.h
@@ -113,6 +113,8 @@ enum powerpc_excp_t {
     POWERPC_EXCP_POWER7,
     /* POWER8 exception model           */
     POWERPC_EXCP_POWER8,
+    /* POWER9 exception model           */
+    POWERPC_EXCP_POWER9,
 };
 
 /*****************************************************************************/
diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c
index 7536620a4133..37546bb0f0fe 100644
--- a/target/ppc/excp_helper.c
+++ b/target/ppc/excp_helper.c
@@ -147,7 +147,7 @@ static inline void powerpc_excp(PowerPCCPU *cpu, int 
excp_model, int excp)
 
     /* Exception targetting modifiers
      *
-     * LPES0 is supported on POWER7/8
+     * LPES0 is supported on POWER7/8/9
      * LPES1 is not supported (old iSeries mode)
      *
      * On anything else, we behave as if LPES0 is 1
@@ -158,9 +158,10 @@ static inline void powerpc_excp(PowerPCCPU *cpu, int 
excp_model, int excp)
      */
 #if defined(TARGET_PPC64)
     if (excp_model == POWERPC_EXCP_POWER7 ||
-        excp_model == POWERPC_EXCP_POWER8) {
+        excp_model == POWERPC_EXCP_POWER8 ||
+        excp_model == POWERPC_EXCP_POWER9) {
         lpes0 = !!(env->spr[SPR_LPCR] & LPCR_LPES0);
-        if (excp_model == POWERPC_EXCP_POWER8) {
+        if (excp_model != POWERPC_EXCP_POWER7) {
             ail = (env->spr[SPR_LPCR] & LPCR_AIL) >> LPCR_AIL_SHIFT;
         } else {
             ail = 0;
@@ -662,7 +663,15 @@ static inline void powerpc_excp(PowerPCCPU *cpu, int 
excp_model, int excp)
         }
     } else if (excp_model == POWERPC_EXCP_POWER8) {
         if (new_msr & MSR_HVB) {
-            if (env->spr[SPR_HID0] & (HID0_HILE | HID0_POWER9_HILE)) {
+            if (env->spr[SPR_HID0] & HID0_HILE) {
+                new_msr |= (target_ulong)1 << MSR_LE;
+            }
+        } else if (env->spr[SPR_LPCR] & LPCR_ILE) {
+            new_msr |= (target_ulong)1 << MSR_LE;
+        }
+    } else if (excp_model == POWERPC_EXCP_POWER9) {
+        if (new_msr & MSR_HVB) {
+            if (env->spr[SPR_HID0] & HID0_POWER9_HILE) {
                 new_msr |= (target_ulong)1 << MSR_LE;
             }
         } else if (env->spr[SPR_LPCR] & LPCR_ILE) {
diff --git a/target/ppc/translate.c b/target/ppc/translate.c
index 75d170d1594f..106c43695252 100644
--- a/target/ppc/translate.c
+++ b/target/ppc/translate.c
@@ -7480,7 +7480,8 @@ void ppc_cpu_dump_state(CPUState *cs, FILE *f, 
fprintf_function cpu_fprintf,
 
 #if defined(TARGET_PPC64)
     if (env->excp_model == POWERPC_EXCP_POWER7 ||
-        env->excp_model == POWERPC_EXCP_POWER8) {
+        env->excp_model == POWERPC_EXCP_POWER8 ||
+        env->excp_model == POWERPC_EXCP_POWER9)  {
         cpu_fprintf(f, "HSRR0 " TARGET_FMT_lx " HSRR1 " TARGET_FMT_lx "\n",
                     env->spr[SPR_HSRR0], env->spr[SPR_HSRR1]);
     }
diff --git a/target/ppc/translate_init.inc.c b/target/ppc/translate_init.inc.c
index 1cfb70aced12..f8a780e323f2 100644
--- a/target/ppc/translate_init.inc.c
+++ b/target/ppc/translate_init.inc.c
@@ -8905,7 +8905,7 @@ POWERPC_FAMILY(POWER9)(ObjectClass *oc, void *data)
     pcc->hash64_opts = &ppc_hash64_opts_POWER7;
     pcc->radix_page_info = &POWER9_radix_page_info;
 #endif
-    pcc->excp_model = POWERPC_EXCP_POWER8;
+    pcc->excp_model = POWERPC_EXCP_POWER9;
     pcc->bus_model = PPC_FLAGS_INPUT_POWER7;
     pcc->bfd_mach = bfd_mach_ppc64;
     pcc->flags = POWERPC_FLAG_VRE | POWERPC_FLAG_SE |
-- 
2.20.1