Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* hw/i386: split isapc from PCI boards
* cpu-exec, accel: remove BQL usage for interrupt_request != 0
* memory, hpet, pmtimer: introduce BQL-free PIO/MMIO

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* tag 'for-upstream' of https://gitlab.com/bonzini/qemu: (28 commits)
  tcg: move interrupt caching and single step masking closer to user
  kvm: i386: irqchip: take BQL only if there is an interrupt
  hpet: make main counter read lock-less
  hpet: move out main counter read into a separate block
  hpet: switch to fine-grained device locking
  acpi: mark PMTIMER as unlocked
  memory: reintroduce BQL-free fine-grained PIO/MMIO
  add cpu_test_interrupt()/cpu_set_interrupt() helpers and use them tree wide
  user-exec: ensure interrupt_request is not used
  hw/i386/isapc.c: replace rom_memory with system_memory
  hw/i386/pc_piix.c: replace rom_memory with pci_memory
  hw/i386/pc_piix.c: remove unused headers after isapc machine split
  hw/i386: move isapc machine to separate isapc.c file
  hw/i386/pc_piix.c: assume pcmc->pci_enabled is always true in pc_init1()
  hw/i386/pc_piix.c: always initialise ISA IDE drives in pc_init_isa()
  hw/i386/pc_piix.c: remove pc_system_flash_cleanup_unused() from pc_init_isa()
  hw/i386/pc_piix.c: hardcode hole64_size to 0 in pc_init_isa()
  hw/i386/pc_piix.c: simplify RAM size logic in pc_init_isa()
  hw/i386/pc_piix.c: remove nvdimm initialisation from pc_init_isa()
  hw/i386/pc_piix.c: remove SGX initialisation from pc_init_isa()
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 23 insertions, 0 deletions

diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h
index 5eaf41a566..b01a0cffd6 100644
--- a/include/hw/core/cpu.h
+++ b/include/hw/core/cpu.h
@@ -423,6 +423,7 @@ struct qemu_work_item;
  * @created: Indicates whether the CPU thread has been successfully created.
  * @halt_cond: condition variable sleeping threads can wait on.
  * @interrupt_request: Indicates a pending interrupt request.
+ *   Only used by system emulation.
  * @halted: Nonzero if the CPU is in suspended state.
  * @stop: Indicates a pending stop request.
  * @stopped: Indicates the CPU has been artificially stopped.
@@ -943,6 +944,28 @@ CPUState *cpu_by_arch_id(int64_t id);
 void cpu_interrupt(CPUState *cpu, int mask);
 
 /**
+ * cpu_test_interrupt:
+ * @cpu: The CPU to check interrupt(s) on.
+ * @mask: The interrupts to check.
+ *
+ * Checks if any of interrupts in @mask are pending on @cpu.
+ */
+static inline bool cpu_test_interrupt(CPUState *cpu, int mask)
+{
+    return qatomic_load_acquire(&cpu->interrupt_request) & mask;
+}
+
+/**
+ * cpu_set_interrupt:
+ * @cpu: The CPU to set pending interrupt(s) on.
+ * @mask: The interrupts to set.
+ *
+ * Sets interrupts in @mask as pending on @cpu.  Unlike @cpu_interrupt,
+ * this does not kick the vCPU.
+ */
+void cpu_set_interrupt(CPUState *cpu, int mask);
+
+/**
  * cpu_set_pc:
  * @cpu: The CPU to set the program counter for.
  * @addr: Program counter value.