Merge tag 'accel-20260706' of https://github.com/philmd/qemu into staging

Accelerators patches queue

- Various cleanups around debugging APIs
- Correctly check singlestep flag enabled in CPUState
- Fix possible memory corruption with MSHV (CID 1660876)

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* tag 'accel-20260706' of https://github.com/philmd/qemu: (32 commits)
  cpu: Only check SSTEP_ENABLE flag in cpu_single_stepping()
  cpu: Rename CPUState @singlestep_enabled -> @singlestep_flags
  cpu: Introduce cpu_single_stepping() helper
  cpu: Better name cpu_single_step() trace event
  accel/tcg: Improve docstrings around TCGCPUOps::*watchpoint* handlers
  target/ppc: Ensure TCG is used in ppc_update_daw()
  target/arm: Inline check_watchpoints() in arm_debug_check_watchpoint()
  accel: Use GdbBreakpointType enum
  gdbstub: Introduce GdbBreakpointType enumerator
  gdbstub: Reduce @type variable scope
  gdbstub/user: Directly call gdb_breakpoint_remove_all() in user mode
  accel: Remove unnecessary 'inline' qualifier in remove_all_breakpoints
  cpu: Move BREAKPOINT definitions to 'exec/breakpoint.h'
  cpu: Move cpu_breakpoint_test out of line
  accel: Remove AccelOpsClass::supports_guest_debug
  accel: Hold @can_reverse information in AccelGdbConfig
  gdbstub: Make default replay_mode value explicit in stubs
  accel: Have each implementation return their AccelGdbConfig
  gdbstub: Move supported_sstep_flags in AccelGdbConfig structure
  gdbstub: Reduce gdb_supports_guest_debug() scope
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

docs/system/gdb.rst

@@ -54,7 +54,7 @@ While GDB can always fall back to inserting breakpoints into memory
 accelerator. For TCG system emulation we advertise an infinite number
 of hardware assisted breakpoints and watchpoints. For other
 accelerators it will depend on if support has been added (see
-supports_guest_debug and related hooks in AccelOpsClass).
+the AccelGdbConfig structure).
 
 As TCG cannot track all memory accesses in user-mode there is no
 support for watchpoints.