[Qemu-devel] [PATCH RFC] target-ppc: tlbie should have global effect

[Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>]

tlbie (and H_REMOVE for pseries) should have a global effect. This is
achieved by iterating and setting tlb_need_flush in all the CPUs.

Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>

--

Note: Haven't changed following POWERPC_MMU_32B and POWERPC_MMU_601 yet.
As I am not sure about it.
---
 target-ppc/cpu.h         |  3 ++-
 target-ppc/helper.h      |  1 +
 target-ppc/helper_regs.h | 13 +++++++++----
 target-ppc/mmu-hash64.c  | 16 ++++++++++------
 target-ppc/mmu_helper.c  | 29 +++++++++++++++++++++++------
 target-ppc/translate.c   |  2 +-
 6 files changed, 46 insertions(+), 18 deletions(-)

diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h
index 1e808c8..59889f8 100644
--- a/target-ppc/cpu.h
+++ b/target-ppc/cpu.h
@@ -1251,7 +1251,8 @@ void store_40x_sler (CPUPPCState *env, uint32_t val);
 void store_booke_tcr (CPUPPCState *env, target_ulong val);
 void store_booke_tsr (CPUPPCState *env, target_ulong val);
 void ppc_tlb_invalidate_all (CPUPPCState *env);
-void ppc_tlb_invalidate_one (CPUPPCState *env, target_ulong addr);
+void ppc_tlb_invalidate_one(CPUPPCState *env, target_ulong addr,
+                            unsigned int global);
 void cpu_ppc_set_papr(PowerPCCPU *cpu);
 #endif
 #endif
diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index dcf3f95..79fb688 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -561,6 +561,7 @@ DEF_HELPER_2(74xx_tlbd, void, env, tl)
 DEF_HELPER_2(74xx_tlbi, void, env, tl)
 DEF_HELPER_FLAGS_1(tlbia, TCG_CALL_NO_RWG, void, env)
 DEF_HELPER_FLAGS_2(tlbie, TCG_CALL_NO_RWG, void, env, tl)
+DEF_HELPER_FLAGS_2(tlbiel, TCG_CALL_NO_RWG, void, env, tl)
 DEF_HELPER_FLAGS_2(tlbiva, TCG_CALL_NO_RWG, void, env, tl)
 #if defined(TARGET_PPC64)
 DEF_HELPER_FLAGS_3(store_slb, TCG_CALL_NO_RWG, void, env, tl, tl)
diff --git a/target-ppc/helper_regs.h b/target-ppc/helper_regs.h
index 3d279f1..f3eb21d 100644
--- a/target-ppc/helper_regs.h
+++ b/target-ppc/helper_regs.h
@@ -156,10 +156,15 @@ static inline int hreg_store_msr(CPUPPCState *env, target_ulong value,
 #if !defined(CONFIG_USER_ONLY)
 static inline void check_tlb_flush(CPUPPCState *env)
 {
-    CPUState *cs = CPU(ppc_env_get_cpu(env));
-    if (env->tlb_need_flush) {
-        env->tlb_need_flush = 0;
-        tlb_flush(cs, 1);
+    CPUState *cs;
+
+    CPU_FOREACH(cs) {
+        PowerPCCPU *cpu = POWERPC_CPU(cs);
+        CPUPPCState *env = &cpu->env;
+        if (env->tlb_need_flush) {
+            env->tlb_need_flush = 0;
+            tlb_flush(cs, 1);
+        }
     }
 }
 #else
diff --git a/target-ppc/mmu-hash64.c b/target-ppc/mmu-hash64.c
index 8118143..a76c92b 100644
--- a/target-ppc/mmu-hash64.c
+++ b/target-ppc/mmu-hash64.c
@@ -907,12 +907,16 @@ void ppc_hash64_tlb_flush_hpte(PowerPCCPU *cpu,
                                target_ulong pte_index,
                                target_ulong pte0, target_ulong pte1)
 {
-    /*
-     * XXX: given the fact that there are too many segments to
-     * invalidate, and we still don't have a tlb_flush_mask(env, n,
-     * mask) in QEMU, we just invalidate all TLBs
-     */
-    tlb_flush(CPU(cpu), 1);
+    CPUState *cs;
+
+    CPU_FOREACH(cs) {
+        /*
+         * XXX: given the fact that there are too many segments to
+         * invalidate, and we still don't have a tlb_flush_mask(env, n,
+         * mask) in QEMU, we just invalidate all TLBs
+         */
+        tlb_flush(cs, 1);
+    }
 }
 
 void ppc_hash64_update_rmls(CPUPPCState *env)
diff --git a/target-ppc/mmu_helper.c b/target-ppc/mmu_helper.c
index 696bb03..1923f1b 100644
--- a/target-ppc/mmu_helper.c
+++ b/target-ppc/mmu_helper.c
@@ -1946,7 +1946,8 @@ void ppc_tlb_invalidate_all(CPUPPCState *env)
     }
 }
 
-void ppc_tlb_invalidate_one(CPUPPCState *env, target_ulong addr)
+void ppc_tlb_invalidate_one(CPUPPCState *env, target_ulong addr,
+                            unsigned int global)
 {
 #if !defined(FLUSH_ALL_TLBS)
     addr &= TARGET_PAGE_MASK;
@@ -1979,7 +1980,14 @@ void ppc_tlb_invalidate_one(CPUPPCState *env, target_ulong addr)
          *      and we still don't have a tlb_flush_mask(env, n, mask) in QEMU,
          *      we just invalidate all TLBs
          */
-        env->tlb_need_flush = 1;
+        if (!global) {
+            env->tlb_need_flush = 1;
+        } else {
+            CPUState *other_cs;
+            CPU_FOREACH(other_cs) {
+                env->tlb_need_flush = 1;
+            }
+        }
         break;
 #endif /* defined(TARGET_PPC64) */
     default:
@@ -2078,7 +2086,12 @@ void helper_tlbia(CPUPPCState *env)
 
 void helper_tlbie(CPUPPCState *env, target_ulong addr)
 {
-    ppc_tlb_invalidate_one(env, addr);
+    ppc_tlb_invalidate_one(env, addr, 1);
+}
+
+void helper_tlbiel(CPUPPCState *env, target_ulong addr)
+{
+    ppc_tlb_invalidate_one(env, addr, 0);
 }
 
 void helper_tlbiva(CPUPPCState *env, target_ulong addr)
@@ -2757,7 +2770,7 @@ static inline void booke206_invalidate_ea_tlb(CPUPPCState *env, int tlbn,
 
 void helper_booke206_tlbivax(CPUPPCState *env, target_ulong address)
 {
-    PowerPCCPU *cpu = ppc_env_get_cpu(env);
+    CPUState *cs;
 
     if (address & 0x4) {
         /* flush all entries */
@@ -2774,11 +2787,15 @@ void helper_booke206_tlbivax(CPUPPCState *env, target_ulong address)
     if (address & 0x8) {
         /* flush TLB1 entries */
         booke206_invalidate_ea_tlb(env, 1, address);
-        tlb_flush(CPU(cpu), 1);
+        CPU_FOREACH(cs) {
+            tlb_flush(cs, 1);
+        }
     } else {
         /* flush TLB0 entries */
         booke206_invalidate_ea_tlb(env, 0, address);
-        tlb_flush_page(CPU(cpu), address & MAS2_EPN_MASK);
+        CPU_FOREACH(cs) {
+            tlb_flush_page(cs, address & MAS2_EPN_MASK);
+        }
     }
 }
 
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index 618334a..86a8fb6 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -4432,7 +4432,7 @@ static void gen_tlbiel(DisasContext *ctx)
 #else
     CHK_SV;
 
-    gen_helper_tlbie(cpu_env, cpu_gpr[rB(ctx->opcode)]);
+    gen_helper_tlbiel(cpu_env, cpu_gpr[rB(ctx->opcode)]);
 #endif /* defined(CONFIG_USER_ONLY) */
 }
 
-- 
2.7.4