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

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* 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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# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [unknown]
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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>
This commit is contained in:
Richard Henderson
2025-08-31 09:08:09 +10:00
parent e101d33792 83bd8e65bc
commit 91589bcd9f
44 changed files with 490 additions and 319 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/hw/core/cpu.h
+23
View File
@@ -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.
@@ -942,6 +943,28 @@ 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.
include/system/memory.h
+12
View File
@@ -833,6 +833,7 @@ struct MemoryRegion {
bool nonvolatile;
bool rom_device;
bool flush_coalesced_mmio;
bool lockless_io;
bool unmergeable;
uint8_t dirty_log_mask;
bool is_iommu;
@@ -2341,6 +2342,17 @@ void memory_region_set_flush_coalesced(MemoryRegion *mr);
*/
void memory_region_clear_flush_coalesced(MemoryRegion *mr);
/**
* memory_region_enable_lockless_io: Enable lockless (BQL free) acceess.
*
* Enable BQL-free access for devices that are well prepared to handle
* locking during I/O themselves: either by doing fine grained locking or
* by providing lock-free I/O schemes.
*
* @mr: the memory region to be updated.
*/
void memory_region_enable_lockless_io(MemoryRegion *mr);
/**
* memory_region_add_eventfd: Request an eventfd to be triggered when a word
* is written to a location.