Merge tag 'pull-misc-20250924' of https://gitlab.com/rth7680/qemu into staging

hw/pci-host/{dino,astro}: Don't call pci_register_root_bus() in init
target/sparc: Loosen various decode for v7
linux-user: Add syscall dispatch support
tcg/optimize: Fix folding of vector bitsel
include/hw/core/cpu: Introduce MMUIdxMap
include/hw/core/cpu: Introduce cpu_tlb_fast
include/hw/core/cpu: Invert the indexing into CPUTLBDescFast
accel/tcg: Remove dead mmap_unlock() call in invalidate_phys_page_range
accel/tcg: Remove cpu_loop_exit_restore() stub
accel/tcg: Properly unlink a TB linked to itself
accel/tcg: Introduce and use tb_flush__exclusive_or_serial

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# gpg: Signature made Wed 24 Sep 2025 11:59:31 AM PDT
# gpg:                using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
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# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [ultimate]

* tag 'pull-misc-20250924' of https://gitlab.com/rth7680/qemu: (32 commits)
  accel/tcg: Remove cpu_loop_exit_restore() stub
  accel/tcg: Remove dead mmap_unlock() call in invalidate_phys_page_range
  accel/tcg: Improve buffer overflow in tb_gen_code
  accel/tcg: Create queue_tb_flush from tb_flush
  linux-user: Split out begin_parallel_context
  plugins: Use tb_flush__exclusive_or_serial
  accel/tcg: Move post-load tb_flush to vm_change_state hook
  accel/tcg: Split out tb_flush__exclusive_or_serial
  hw/ppc/spapr: Use tb_invalidate_phys_range in h_page_init
  target/riscv: Record misa_ext in TCGTBCPUState.cs_base
  target/alpha: Simplify call_pal implementation
  gdbstub: Remove tb_flush uses
  tests/tcg/multiarch: Add tb-link test
  accel/tcg: Properly unlink a TB linked to itself
  target/hppa: Adjust mmu indexes to begin with 0
  include/hw/core/cpu: Invert the indexing into CPUTLBDescFast
  include/hw/core/cpu: Introduce cpu_tlb_fast
  include/hw/core/cpu: Introduce MMUIdxMap
  tcg/optimize: Fix folding of vector bitsel
  hw/pci-host/astro: Don't call pci_regsiter_root_bus() in init
  ...

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

1 files changed, 20 insertions, 10 deletions

diff --git a/include/exec/tb-flush.h b/include/exec/tb-flush.h
index 142c240d94..e971d4ba6d 100644
--- a/include/exec/tb-flush.h
+++ b/include/exec/tb-flush.h
@@ -9,19 +9,29 @@
 #define _TB_FLUSH_H_
 
 /**
- * tb_flush() - flush all translation blocks
- * @cs: CPUState (must be valid, but treated as anonymous pointer)
+ * tb_flush__exclusive_or_serial()
  *
- * Used to flush all the translation blocks in the system. Sometimes
- * it is simpler to flush everything than work out which individual
- * translations are now invalid and ensure they are not called
- * anymore.
+ * Used to flush all the translation blocks in the system.  Mostly this is
+ * used to empty the code generation buffer after it is full.  Sometimes it
+ * is used when it is simpler to flush everything than work out which
+ * individual translations are now invalid.
  *
- * tb_flush() takes care of running the flush in an exclusive context
- * if it is not already running in one. This means no guest code will
- * run until this complete.
+ * Must be called from an exclusive or serial context, e.g. start_exclusive,
+ * vm_stop, or when there is only one vcpu.  Note that start_exclusive cannot
+ * be called from within the cpu run loop, so this cannot be called from
+ * within target code.
  */
-void tb_flush(CPUState *cs);
+void tb_flush__exclusive_or_serial(void);
+
+/**
+ * queue_tb_flush() - add flush to the cpu work queue
+ * @cs: CPUState
+ *
+ * Flush all translation blocks the next time @cs processes the work queue.
+ * This should generally be followed by cpu_loop_exit(), so that the work
+ * queue is processed promptly.
+ */
+void queue_tb_flush(CPUState *cs);
 
 void tcg_flush_jmp_cache(CPUState *cs);