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

* cpu-exec: more cleanups to CPU loop exits
* python: bump bundled Meson to 1.9.0
* rust: require Rust 1.83.0
* rust: temporarily remove from Ubuntu CI
* rust: vmstate: convert to use builder pattern
* rust: split "qemu-api" crate
* rust: rename qemu_api_macros -> qemu_macros
* rust: re-export qemu macros from other crates
* x86: fix functional test failure for Xen emulation
* x86: cleanups

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# gpg:                using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
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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: (60 commits)
  accel/kvm: Set guest_memfd_offset to non-zero value only when guest_memfd is valid
  accel/kvm: Zero out mem explicitly in kvm_set_user_memory_region()
  accel/kvm: Switch to check KVM_CAP_GUEST_MEMFD and KVM_CAP_USER_MEMORY2 on VM
  i386/kvm: Drop KVM_CAP_X86_SMM check in kvm_arch_init()
  multiboot: Fix the split lock
  target/i386: Define enum X86ASIdx for x86's address spaces
  i386/cpu: Enable SMM cpu address space under KVM
  hpet: guard IRQ handling with BQL
  rust: do not inline do_init_io
  rust: meson: remove unnecessary complication in device crates
  docs: update rust.rst
  rust: re-export qemu macros from common/qom/hwcore
  rust: re-export qemu_macros internal helper in "bits"
  rust: repurpose qemu_api -> tests
  rust/pl011: drop dependency on qemu_api
  rust/hpet: drop now unneeded qemu_api dep
  rust: rename qemu_api_macros -> qemu_macros
  rust: split "hwcore" crate
  rust: split "system" crate
  rust: split "chardev" crate
  ...

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

1 files changed, 8 insertions, 7 deletions

diff --git a/system/cpus.c b/system/cpus.c
index 437848b5eb..aa7bfcf56e 100644
--- a/system/cpus.c
+++ b/system/cpus.c
@@ -257,8 +257,7 @@ int64_t cpus_get_elapsed_ticks(void)
 void cpu_set_interrupt(CPUState *cpu, int mask)
 {
     /* Pairs with cpu_test_interrupt(). */
-    qatomic_store_release(&cpu->interrupt_request,
-        cpu->interrupt_request | mask);
+    qatomic_or(&cpu->interrupt_request, mask);
 }
 
 void generic_handle_interrupt(CPUState *cpu, int mask)
@@ -451,7 +450,7 @@ static void qemu_cpu_stop(CPUState *cpu, bool exit)
     qemu_cond_broadcast(&qemu_pause_cond);
 }
 
-void qemu_wait_io_event_common(CPUState *cpu)
+void qemu_process_cpu_events_common(CPUState *cpu)
 {
     qatomic_set_mb(&cpu->thread_kicked, false);
     if (cpu->stop) {
@@ -460,10 +459,11 @@ void qemu_wait_io_event_common(CPUState *cpu)
     process_queued_cpu_work(cpu);
 }
 
-void qemu_wait_io_event(CPUState *cpu)
+void qemu_process_cpu_events(CPUState *cpu)
 {
     bool slept = false;
 
+    qatomic_set(&cpu->exit_request, false);
     while (cpu_thread_is_idle(cpu)) {
         if (!slept) {
             slept = true;
@@ -475,7 +475,7 @@ void qemu_wait_io_event(CPUState *cpu)
         qemu_plugin_vcpu_resume_cb(cpu);
     }
 
-    qemu_wait_io_event_common(cpu);
+    qemu_process_cpu_events_common(cpu);
 }
 
 void cpus_kick_thread(CPUState *cpu)
@@ -605,7 +605,7 @@ void cpu_pause(CPUState *cpu)
         qemu_cpu_stop(cpu, true);
     } else {
         cpu->stop = true;
-        qemu_cpu_kick(cpu);
+        cpu_exit(cpu);
     }
 }
 
@@ -645,6 +645,7 @@ void pause_all_vcpus(void)
 
     while (!all_vcpus_paused()) {
         qemu_cond_wait(&qemu_pause_cond, &bql);
+        /* FIXME: is this needed? */
         CPU_FOREACH(cpu) {
             qemu_cpu_kick(cpu);
         }
@@ -673,7 +674,7 @@ void cpu_remove_sync(CPUState *cpu)
 {
     cpu->stop = true;
     cpu->unplug = true;
-    qemu_cpu_kick(cpu);
+    cpu_exit(cpu);
     bql_unlock();
     qemu_thread_join(cpu->thread);
     bql_lock();