[Qemu-devel] [PATCH 22/35] target/ppc: access cpu->interrupt_request with atomics

[Emilio G. Cota]

From: Paolo Bonzini <pbonz...@redhat.com>

Cc: David Gibson <da...@gibson.dropbear.id.au>
Cc: Alexander Graf <ag...@suse.de>
Cc: qemu-...@nongnu.org
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
Signed-off-by: Emilio G. Cota <c...@braap.org>
---
 hw/ppc/ppc.c                    |  2 +-
 target/ppc/excp_helper.c        |  3 ++-
 target/ppc/kvm.c                |  4 ++--
 target/ppc/translate_init.inc.c | 17 ++++++++++-------
 4 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/hw/ppc/ppc.c b/hw/ppc/ppc.c
index ec4be25f49..ad0cfb2f7c 100644
--- a/hw/ppc/ppc.c
+++ b/hw/ppc/ppc.c
@@ -91,7 +91,7 @@ void ppc_set_irq(PowerPCCPU *cpu, int n_IRQ, int level)
 
     LOG_IRQ("%s: %p n_IRQ %d level %d => pending %08" PRIx32
                 "req %08x\n", __func__, env, n_IRQ, level,
-                env->pending_interrupts, CPU(cpu)->interrupt_request);
+            env->pending_interrupts, 
atomic_read(&CPU(cpu)->interrupt_request));
 
     if (locked) {
         qemu_mutex_unlock_iothread();
diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c
index 6ffa762033..70ac10e23b 100644
--- a/target/ppc/excp_helper.c
+++ b/target/ppc/excp_helper.c
@@ -753,7 +753,8 @@ static void ppc_hw_interrupt(CPUPPCState *env)
 
     qemu_log_mask(CPU_LOG_INT, "%s: %p pending %08x req %08x me %d ee %d\n",
                   __func__, env, env->pending_interrupts,
-                  cs->interrupt_request, (int)msr_me, (int)msr_ee);
+                  atomic_read(&cs->interrupt_request),
+                  (int)msr_me, (int)msr_ee);
 #endif
     /* External reset */
     if (env->pending_interrupts & (1 << PPC_INTERRUPT_RESET)) {
diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
index 9211ee2ee1..8214738c20 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -1336,7 +1336,7 @@ void kvm_arch_pre_run(CPUState *cs, struct kvm_run *run)
      * interrupt, reset, etc) in PPC-specific env->irq_input_state. */
     if (!cap_interrupt_level &&
         run->ready_for_interrupt_injection &&
-        (cs->interrupt_request & CPU_INTERRUPT_HARD) &&
+        (atomic_read(&cs->interrupt_request) & CPU_INTERRUPT_HARD) &&
         (env->irq_input_state & (1<<PPC_INPUT_INT)))
     {
         /* For now KVM disregards the 'irq' argument. However, in the
@@ -1378,7 +1378,7 @@ static int kvmppc_handle_halt(PowerPCCPU *cpu)
     CPUState *cs = CPU(cpu);
     CPUPPCState *env = &cpu->env;
 
-    if (!(cs->interrupt_request & CPU_INTERRUPT_HARD) && (msr_ee)) {
+    if (!(atomic_read(&cs->interrupt_request) & CPU_INTERRUPT_HARD) && msr_ee) 
{
         cs->halted = 1;
         cs->exception_index = EXCP_HLT;
     }
diff --git a/target/ppc/translate_init.inc.c b/target/ppc/translate_init.inc.c
index d920d3e538..3ed8298bc7 100644
--- a/target/ppc/translate_init.inc.c
+++ b/target/ppc/translate_init.inc.c
@@ -8442,11 +8442,12 @@ static bool ppc_pvr_match_power7(PowerPCCPUClass *pcc, 
uint32_t pvr)
 
 static bool cpu_has_work_POWER7(CPUState *cs)
 {
+    uint32_t interrupt_request = atomic_read(&cs->interrupt_request);
     PowerPCCPU *cpu = POWERPC_CPU(cs);
     CPUPPCState *env = &cpu->env;
 
     if (cs->halted) {
-        if (!(cs->interrupt_request & CPU_INTERRUPT_HARD)) {
+        if (!(interrupt_request & CPU_INTERRUPT_HARD)) {
             return false;
         }
         if ((env->pending_interrupts & (1u << PPC_INTERRUPT_EXT)) &&
@@ -8470,7 +8471,7 @@ static bool cpu_has_work_POWER7(CPUState *cs)
         }
         return false;
     } else {
-        return msr_ee && (cs->interrupt_request & CPU_INTERRUPT_HARD);
+        return msr_ee && (interrupt_request & CPU_INTERRUPT_HARD);
     }
 }
 
@@ -8596,11 +8597,12 @@ static bool ppc_pvr_match_power8(PowerPCCPUClass *pcc, 
uint32_t pvr)
 
 static bool cpu_has_work_POWER8(CPUState *cs)
 {
+    uint32_t interrupt_request = atomic_read(&cs->interrupt_request);
     PowerPCCPU *cpu = POWERPC_CPU(cs);
     CPUPPCState *env = &cpu->env;
 
     if (cs->halted) {
-        if (!(cs->interrupt_request & CPU_INTERRUPT_HARD)) {
+        if (!(interrupt_request & CPU_INTERRUPT_HARD)) {
             return false;
         }
         if ((env->pending_interrupts & (1u << PPC_INTERRUPT_EXT)) &&
@@ -8632,7 +8634,7 @@ static bool cpu_has_work_POWER8(CPUState *cs)
         }
         return false;
     } else {
-        return msr_ee && (cs->interrupt_request & CPU_INTERRUPT_HARD);
+        return msr_ee && (interrupt_request & CPU_INTERRUPT_HARD);
     }
 }
 
@@ -8788,11 +8790,12 @@ static bool ppc_pvr_match_power9(PowerPCCPUClass *pcc, 
uint32_t pvr)
 
 static bool cpu_has_work_POWER9(CPUState *cs)
 {
+    uint32_t interrupt_request = atomic_read(&cs->interrupt_request);
     PowerPCCPU *cpu = POWERPC_CPU(cs);
     CPUPPCState *env = &cpu->env;
 
     if (cs->halted) {
-        if (!(cs->interrupt_request & CPU_INTERRUPT_HARD)) {
+        if (!(interrupt_request & CPU_INTERRUPT_HARD)) {
             return false;
         }
         /* External Exception */
@@ -8825,7 +8828,7 @@ static bool cpu_has_work_POWER9(CPUState *cs)
         }
         return false;
     } else {
-        return msr_ee && (cs->interrupt_request & CPU_INTERRUPT_HARD);
+        return msr_ee && (interrupt_request & CPU_INTERRUPT_HARD);
     }
 }
 
@@ -10269,7 +10272,7 @@ static bool ppc_cpu_has_work(CPUState *cs)
     PowerPCCPU *cpu = POWERPC_CPU(cs);
     CPUPPCState *env = &cpu->env;
 
-    return msr_ee && (cs->interrupt_request & CPU_INTERRUPT_HARD);
+    return msr_ee && (atomic_read(&cs->interrupt_request) & 
CPU_INTERRUPT_HARD);
 }
 
 /* CPUClass::reset() */
-- 
2.17.1