Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20190510' into staging

Add CPUClass::tlb_fill.
Improve tlb_vaddr_to_host for use by ARM SVE no-fault loads.

# gpg: Signature made Fri 10 May 2019 19:48:37 BST
# gpg:                using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
# gpg:                issuer "richard.henderson@linaro.org"
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [full]
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* remotes/rth/tags/pull-tcg-20190510: (27 commits)
  tcg: Use tlb_fill probe from tlb_vaddr_to_host
  tcg: Remove CPUClass::handle_mmu_fault
  tcg: Use CPUClass::tlb_fill in cputlb.c
  target/xtensa: Convert to CPUClass::tlb_fill
  target/unicore32: Convert to CPUClass::tlb_fill
  target/tricore: Convert to CPUClass::tlb_fill
  target/tilegx: Convert to CPUClass::tlb_fill
  target/sparc: Convert to CPUClass::tlb_fill
  target/sh4: Convert to CPUClass::tlb_fill
  target/s390x: Convert to CPUClass::tlb_fill
  target/riscv: Convert to CPUClass::tlb_fill
  target/ppc: Convert to CPUClass::tlb_fill
  target/openrisc: Convert to CPUClass::tlb_fill
  target/nios2: Convert to CPUClass::tlb_fill
  target/moxie: Convert to CPUClass::tlb_fill
  target/mips: Convert to CPUClass::tlb_fill
  target/mips: Tidy control flow in mips_cpu_handle_mmu_fault
  target/mips: Pass a valid error to raise_mmu_exception for user-only
  target/microblaze: Convert to CPUClass::tlb_fill
  target/m68k: Convert to CPUClass::tlb_fill
  ...

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

3 files changed, 25 insertions, 35 deletions

diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 1bcf4ea..b767570 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -355,14 +355,13 @@ static void riscv_cpu_class_init(ObjectClass *c, void *data)
 #endif
     cc->gdb_stop_before_watchpoint = true;
     cc->disas_set_info = riscv_cpu_disas_set_info;
-#ifdef CONFIG_USER_ONLY
-    cc->handle_mmu_fault = riscv_cpu_handle_mmu_fault;
-#else
+#ifndef CONFIG_USER_ONLY
     cc->do_unaligned_access = riscv_cpu_do_unaligned_access;
     cc->get_phys_page_debug = riscv_cpu_get_phys_page_debug;
 #endif
 #ifdef CONFIG_TCG
     cc->tcg_initialize = riscv_translate_init;
+    cc->tlb_fill = riscv_cpu_tlb_fill;
 #endif
     /* For now, mark unmigratable: */
     cc->vmsd = &vmstate_riscv_cpu;
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 7d9f489..c17184f 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -261,8 +261,9 @@ hwaddr riscv_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
 void  riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
                                     MMUAccessType access_type, int mmu_idx,
                                     uintptr_t retaddr);
-int riscv_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int size,
-                              int rw, int mmu_idx);
+bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
+                        MMUAccessType access_type, int mmu_idx,
+                        bool probe, uintptr_t retaddr);
 char *riscv_isa_string(RISCVCPU *cpu);
 void riscv_cpu_list(void);
 
diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index b17f169..41d6db4 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -378,54 +378,44 @@ void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
     env->badaddr = addr;
     riscv_raise_exception(env, cs->exception_index, retaddr);
 }
-
-/* called by qemu's softmmu to fill the qemu tlb */
-void tlb_fill(CPUState *cs, target_ulong addr, int size,
-        MMUAccessType access_type, int mmu_idx, uintptr_t retaddr)
-{
-    int ret;
-    ret = riscv_cpu_handle_mmu_fault(cs, addr, size, access_type, mmu_idx);
-    if (ret == TRANSLATE_FAIL) {
-        RISCVCPU *cpu = RISCV_CPU(cs);
-        CPURISCVState *env = &cpu->env;
-        riscv_raise_exception(env, cs->exception_index, retaddr);
-    }
-}
-
 #endif
 
-int riscv_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int size,
-        int rw, int mmu_idx)
+bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
+                        MMUAccessType access_type, int mmu_idx,
+                        bool probe, uintptr_t retaddr)
 {
+#ifndef CONFIG_USER_ONLY
     RISCVCPU *cpu = RISCV_CPU(cs);
     CPURISCVState *env = &cpu->env;
-#if !defined(CONFIG_USER_ONLY)
     hwaddr pa = 0;
     int prot;
-#endif
     int ret = TRANSLATE_FAIL;
 
-    qemu_log_mask(CPU_LOG_MMU,
-            "%s pc " TARGET_FMT_lx " ad %" VADDR_PRIx " rw %d mmu_idx \
-             %d\n", __func__, env->pc, address, rw, mmu_idx);
+    qemu_log_mask(CPU_LOG_MMU, "%s ad %" VADDR_PRIx " rw %d mmu_idx %d\n",
+                  __func__, address, access_type, mmu_idx);
+
+    ret = get_physical_address(env, &pa, &prot, address, access_type, mmu_idx);
 
-#if !defined(CONFIG_USER_ONLY)
-    ret = get_physical_address(env, &pa, &prot, address, rw, mmu_idx);
     qemu_log_mask(CPU_LOG_MMU,
-            "%s address=%" VADDR_PRIx " ret %d physical " TARGET_FMT_plx
-             " prot %d\n", __func__, address, ret, pa, prot);
+                  "%s address=%" VADDR_PRIx " ret %d physical " TARGET_FMT_plx
+                  " prot %d\n", __func__, address, ret, pa, prot);
+
     if (riscv_feature(env, RISCV_FEATURE_PMP) &&
-        !pmp_hart_has_privs(env, pa, TARGET_PAGE_SIZE, 1 << rw)) {
+        !pmp_hart_has_privs(env, pa, TARGET_PAGE_SIZE, 1 << access_type)) {
         ret = TRANSLATE_FAIL;
     }
     if (ret == TRANSLATE_SUCCESS) {
         tlb_set_page(cs, address & TARGET_PAGE_MASK, pa & TARGET_PAGE_MASK,
                      prot, mmu_idx, TARGET_PAGE_SIZE);
-    } else if (ret == TRANSLATE_FAIL) {
-        raise_mmu_exception(env, address, rw);
+        return true;
+    } else if (probe) {
+        return false;
+    } else {
+        raise_mmu_exception(env, address, access_type);
+        riscv_raise_exception(env, cs->exception_index, retaddr);
     }
 #else
-    switch (rw) {
+    switch (access_type) {
     case MMU_INST_FETCH:
         cs->exception_index = RISCV_EXCP_INST_PAGE_FAULT;
         break;
@@ -436,8 +426,8 @@ int riscv_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int size,
         cs->exception_index = RISCV_EXCP_STORE_PAGE_FAULT;
         break;
     }
+    cpu_loop_exit_restore(cs, retaddr);
 #endif
-    return ret;
 }
 
 /*