Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20181018' into staging

Queued tcg patches.

# gpg: Signature made Fri 19 Oct 2018 07:03:20 BST
# gpg:                using RSA key 64DF38E8AF7E215F
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>"
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* remotes/rth/tags/pull-tcg-20181018: (21 commits)
  cputlb: read CPUTLBEntry.addr_write atomically
  target/s390x: Check HAVE_ATOMIC128 and HAVE_CMPXCHG128 at translate
  target/s390x: Skip wout, cout helpers if op helper does not return
  target/s390x: Split do_cdsg, do_lpq, do_stpq
  target/s390x: Convert to HAVE_CMPXCHG128 and HAVE_ATOMIC128
  target/ppc: Convert to HAVE_CMPXCHG128 and HAVE_ATOMIC128
  target/arm: Check HAVE_CMPXCHG128 at translate time
  target/arm: Convert to HAVE_CMPXCHG128
  target/i386: Convert to HAVE_CMPXCHG128
  tcg: Split CONFIG_ATOMIC128
  tcg: Add tlb_index and tlb_entry helpers
  cputlb: serialize tlb updates with env->tlb_lock
  cputlb: fix assert_cpu_is_self macro
  exec: introduce tlb_init
  target/unicore32: remove tlb_flush from uc32_init_fn
  target/alpha: remove tlb_flush from alpha_cpu_initfn
  tcg: distribute tcg_time into TCG contexts
  tcg: plug holes in struct TCGProfile
  tcg: fix use of uninitialized variable under CONFIG_PROFILER
  tcg: access cpu->icount_decr.u16.high with atomics
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

4 files changed, 50 insertions, 16 deletions

diff --git a/include/exec/cpu-defs.h b/include/exec/cpu-defs.h
index a171ffc..4ff62f3 100644
--- a/include/exec/cpu-defs.h
+++ b/include/exec/cpu-defs.h
@@ -24,6 +24,7 @@
 #endif
 
 #include "qemu/host-utils.h"
+#include "qemu/thread.h"
 #include "qemu/queue.h"
 #ifdef CONFIG_TCG
 #include "tcg-target.h"
@@ -142,6 +143,8 @@ typedef struct CPUIOTLBEntry {
 
 #define CPU_COMMON_TLB \
     /* The meaning of the MMU modes is defined in the target code. */   \
+    /* tlb_lock serializes updates to tlb_table and tlb_v_table */      \
+    QemuSpin tlb_lock;                                                  \
     CPUTLBEntry tlb_table[NB_MMU_MODES][CPU_TLB_SIZE];                  \
     CPUTLBEntry tlb_v_table[NB_MMU_MODES][CPU_VTLB_SIZE];               \
     CPUIOTLBEntry iotlb[NB_MMU_MODES][CPU_TLB_SIZE];                    \
diff --git a/include/exec/cpu_ldst.h b/include/exec/cpu_ldst.h
index 41ed052..9590684 100644
--- a/include/exec/cpu_ldst.h
+++ b/include/exec/cpu_ldst.h
@@ -126,6 +126,29 @@ extern __thread uintptr_t helper_retaddr;
 /* The memory helpers for tcg-generated code need tcg_target_long etc.  */
 #include "tcg.h"
 
+static inline target_ulong tlb_addr_write(const CPUTLBEntry *entry)
+{
+#if TCG_OVERSIZED_GUEST
+    return entry->addr_write;
+#else
+    return atomic_read(&entry->addr_write);
+#endif
+}
+
+/* Find the TLB index corresponding to the mmu_idx + address pair.  */
+static inline uintptr_t tlb_index(CPUArchState *env, uintptr_t mmu_idx,
+                                  target_ulong addr)
+{
+    return (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
+}
+
+/* Find the TLB entry corresponding to the mmu_idx + address pair.  */
+static inline CPUTLBEntry *tlb_entry(CPUArchState *env, uintptr_t mmu_idx,
+                                     target_ulong addr)
+{
+    return &env->tlb_table[mmu_idx][tlb_index(env, mmu_idx, addr)];
+}
+
 #ifdef MMU_MODE0_SUFFIX
 #define CPU_MMU_INDEX 0
 #define MEMSUFFIX MMU_MODE0_SUFFIX
@@ -416,8 +439,7 @@ static inline void *tlb_vaddr_to_host(CPUArchState *env, abi_ptr addr,
 #if defined(CONFIG_USER_ONLY)
     return g2h(addr);
 #else
-    int index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
-    CPUTLBEntry *tlbentry = &env->tlb_table[mmu_idx][index];
+    CPUTLBEntry *tlbentry = tlb_entry(env, mmu_idx, addr);
     abi_ptr tlb_addr;
     uintptr_t haddr;
 
@@ -426,7 +448,7 @@ static inline void *tlb_vaddr_to_host(CPUArchState *env, abi_ptr addr,
         tlb_addr = tlbentry->addr_read;
         break;
     case 1:
-        tlb_addr = tlbentry->addr_write;
+        tlb_addr = tlb_addr_write(tlbentry);
         break;
     case 2:
         tlb_addr = tlbentry->addr_code;
@@ -445,7 +467,7 @@ static inline void *tlb_vaddr_to_host(CPUArchState *env, abi_ptr addr,
         return NULL;
     }
 
-    haddr = addr + env->tlb_table[mmu_idx][index].addend;
+    haddr = addr + tlbentry->addend;
     return (void *)haddr;
 #endif /* defined(CONFIG_USER_ONLY) */
 }
diff --git a/include/exec/cpu_ldst_template.h b/include/exec/cpu_ldst_template.h
index 4db2302..0f061d4 100644
--- a/include/exec/cpu_ldst_template.h
+++ b/include/exec/cpu_ldst_template.h
@@ -81,7 +81,7 @@ glue(glue(glue(cpu_ld, USUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
                                                   target_ulong ptr,
                                                   uintptr_t retaddr)
 {
-    int page_index;
+    CPUTLBEntry *entry;
     RES_TYPE res;
     target_ulong addr;
     int mmu_idx;
@@ -94,15 +94,15 @@ glue(glue(glue(cpu_ld, USUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
 #endif
 
     addr = ptr;
-    page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
     mmu_idx = CPU_MMU_INDEX;
-    if (unlikely(env->tlb_table[mmu_idx][page_index].ADDR_READ !=
+    entry = tlb_entry(env, mmu_idx, addr);
+    if (unlikely(entry->ADDR_READ !=
                  (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))))) {
         oi = make_memop_idx(SHIFT, mmu_idx);
         res = glue(glue(helper_ret_ld, URETSUFFIX), MMUSUFFIX)(env, addr,
                                                             oi, retaddr);
     } else {
-        uintptr_t hostaddr = addr + env->tlb_table[mmu_idx][page_index].addend;
+        uintptr_t hostaddr = addr + entry->addend;
         res = glue(glue(ld, USUFFIX), _p)((uint8_t *)hostaddr);
     }
     return res;
@@ -120,7 +120,8 @@ glue(glue(glue(cpu_lds, SUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
                                                   target_ulong ptr,
                                                   uintptr_t retaddr)
 {
-    int res, page_index;
+    CPUTLBEntry *entry;
+    int res;
     target_ulong addr;
     int mmu_idx;
     TCGMemOpIdx oi;
@@ -132,15 +133,15 @@ glue(glue(glue(cpu_lds, SUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
 #endif
 
     addr = ptr;
-    page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
     mmu_idx = CPU_MMU_INDEX;
-    if (unlikely(env->tlb_table[mmu_idx][page_index].ADDR_READ !=
+    entry = tlb_entry(env, mmu_idx, addr);
+    if (unlikely(entry->ADDR_READ !=
                  (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))))) {
         oi = make_memop_idx(SHIFT, mmu_idx);
         res = (DATA_STYPE)glue(glue(helper_ret_ld, SRETSUFFIX),
                                MMUSUFFIX)(env, addr, oi, retaddr);
     } else {
-        uintptr_t hostaddr = addr + env->tlb_table[mmu_idx][page_index].addend;
+        uintptr_t hostaddr = addr + entry->addend;
         res = glue(glue(lds, SUFFIX), _p)((uint8_t *)hostaddr);
     }
     return res;
@@ -162,7 +163,7 @@ glue(glue(glue(cpu_st, SUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
                                                  target_ulong ptr,
                                                  RES_TYPE v, uintptr_t retaddr)
 {
-    int page_index;
+    CPUTLBEntry *entry;
     target_ulong addr;
     int mmu_idx;
     TCGMemOpIdx oi;
@@ -174,15 +175,15 @@ glue(glue(glue(cpu_st, SUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
 #endif
 
     addr = ptr;
-    page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
     mmu_idx = CPU_MMU_INDEX;
-    if (unlikely(env->tlb_table[mmu_idx][page_index].addr_write !=
+    entry = tlb_entry(env, mmu_idx, addr);
+    if (unlikely(tlb_addr_write(entry) !=
                  (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))))) {
         oi = make_memop_idx(SHIFT, mmu_idx);
         glue(glue(helper_ret_st, SUFFIX), MMUSUFFIX)(env, addr, v, oi,
                                                      retaddr);
     } else {
-        uintptr_t hostaddr = addr + env->tlb_table[mmu_idx][page_index].addend;
+        uintptr_t hostaddr = addr + entry->addend;
         glue(glue(st, SUFFIX), _p)((uint8_t *)hostaddr, v);
     }
 }
diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h
index 5f78125..815e5b1 100644
--- a/include/exec/exec-all.h
+++ b/include/exec/exec-all.h
@@ -100,6 +100,11 @@ void cpu_address_space_init(CPUState *cpu, int asidx,
 #if !defined(CONFIG_USER_ONLY) && defined(CONFIG_TCG)
 /* cputlb.c */
 /**
+ * tlb_init - initialize a CPU's TLB
+ * @cpu: CPU whose TLB should be initialized
+ */
+void tlb_init(CPUState *cpu);
+/**
  * tlb_flush_page:
  * @cpu: CPU whose TLB should be flushed
  * @addr: virtual address of page to be flushed
@@ -258,6 +263,9 @@ void tlb_set_page(CPUState *cpu, target_ulong vaddr,
 void probe_write(CPUArchState *env, target_ulong addr, int size, int mmu_idx,
                  uintptr_t retaddr);
 #else
+static inline void tlb_init(CPUState *cpu)
+{
+}
 static inline void tlb_flush_page(CPUState *cpu, target_ulong addr)
 {
 }