[PATCH 1/2] hw/core: Add bql_interrupt flag to CPUClass

[Robert Foley <robert.foley@linaro.org>]

The new flag bql_interrupt, allows the CPUClass to
determine if the BQL should be held during calls to
cpu_exec_interrupt or do_interrupt.

This is being added in preparation for changes in
cpu_handle_interrupt, which will use this flag.

Signed-off-by: Robert Foley <robert.foley@linaro.org>
---
 hw/core/cpu.c         | 1 +
 include/hw/core/cpu.h | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/hw/core/cpu.c b/hw/core/cpu.c
index 8707ce2c34..7ab88caa97 100644
--- a/hw/core/cpu.c
+++ b/hw/core/cpu.c
@@ -425,6 +425,7 @@ static void cpu_class_init(ObjectClass *klass, void *data)
     k->cpu_exec_exit = cpu_common_noop;
     k->cpu_exec_interrupt = cpu_common_exec_interrupt;
     k->adjust_watchpoint_address = cpu_adjust_watchpoint_address;
+    k->bql_interrupt = true;
     set_bit(DEVICE_CATEGORY_CPU, dc->categories);
     dc->realize = cpu_common_realizefn;
     dc->unrealize = cpu_common_unrealizefn;
diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h
index 6a2c77682f..d2c426ee5d 100644
--- a/include/hw/core/cpu.h
+++ b/include/hw/core/cpu.h
@@ -157,6 +157,8 @@ struct TranslationBlock;
  * @disas_set_info: Setup architecture specific components of disassembly info
  * @adjust_watchpoint_address: Perform a target-specific adjustment to an
  * address before attempting to match it against watchpoints.
+ * @bql_interrupt: Hold BQL while performing the cpu_exec_interrupt
+ *                 or do_interrupt call.
  *
  * Represents a CPU family or model.
  */
@@ -227,6 +229,7 @@ typedef struct CPUClass {
     /* Keep non-pointer data at the end to minimize holes.  */
     int gdb_num_core_regs;
     bool gdb_stop_before_watchpoint;
+    bool bql_interrupt;
 } CPUClass;
 
 /*
@@ -589,6 +592,11 @@ static inline void cpu_tb_jmp_cache_clear(CPUState *cpu)
     }
 }
 
+static inline void cpu_class_enable_bql_interrupt(CPUClass *cc)
+{
+    cc->bql_interrupt = true;
+}
+
 /**
  * qemu_tcg_mttcg_enabled:
  * Check whether we are running MultiThread TCG or not.
-- 
2.17.1