Merge tag 'pull-for-8.2-fixes-231123-1' of https://gitlab.com/stsquad/qemu into staging

various random fixes for 8.2

  - replace fedora-i386 cross compiler with debian
  - update cirrus MacOS image to Ventura
  - merge debian-native and debian-amd64 docker images
  - fix compile of plugins on Windows mingw cross
  - add some doc notes on semihosting READC
  - add some doc notes on gdbstub
  - skip loading debug symbols if we have failed
  - enable arm-softmmu TCG tests
  - don't attempt to use native cross builds for linux-user
  - clean up registers gdb test case (ppc64/s390x)

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* tag 'pull-for-8.2-fixes-231123-1' of https://gitlab.com/stsquad/qemu:
  tests/tcg: finesse the registers check for "hidden" regs
  configure: don't try a "native" cross for linux-user
  tests/tcg: enable semiconsole test for Arm
  tests/tcg: enable arm softmmu tests
  testing: move arm system tests into their own folder
  hw/core: skip loading debug on all failures
  docs/system: clarify limits of using gdbstub in system emulation
  docs/emulation: expand warning about semihosting
  tests/tcg: fixup Aarch64 semiconsole test
  target/nios2: Deprecate the Nios II architecture
  plugins: fix win plugin tests on cross compile
  tests/docker: merge debian-native with debian-amd64
  .gitlab-ci.d/cirrus: Upgrade macOS to 13 (Ventura)
  tests/docker: replace fedora-i386 with debian-i686

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

3 files changed, 30 insertions, 3 deletions

diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst
index 6c84db90b5..2e15040246 100644
--- a/docs/about/deprecated.rst
+++ b/docs/about/deprecated.rst
@@ -236,6 +236,16 @@ it. Since all recent x86 hardware from the past >10 years is capable of the
 64-bit x86 extensions, a corresponding 64-bit OS should be used instead.
 
 
+System emulator CPUs
+--------------------
+
+Nios II CPU (since 8.2)
+'''''''''''''''''''''''
+
+The Nios II architecture is orphan. The ``nios2`` guest CPU support is
+deprecated and will be removed in a future version of QEMU.
+
+
 System emulator machines
 ------------------------
 
@@ -254,6 +264,11 @@ These old machine types are quite neglected nowadays and thus might have
 various pitfalls with regards to live migration. Use a newer machine type
 instead.
 
+Nios II ``10m50-ghrd`` and ``nios2-generic-nommu`` machines (since 8.2)
+'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
+
+The Nios II architecture is orphan.
+
 
 Backend options
 ---------------
diff --git a/docs/about/emulation.rst b/docs/about/emulation.rst
index 0ad0b86f0d..a2eefe3f3f 100644
--- a/docs/about/emulation.rst
+++ b/docs/about/emulation.rst
@@ -129,8 +129,9 @@ causing most hypervisors to trap and fault on them.
 .. warning::
    Semihosting inherently bypasses any isolation there may be between
    the guest and the host. As a result a program using semihosting can
-   happily trash your host system. You should only ever run trusted
-   code with semihosting enabled.
+   happily trash your host system. Some semihosting calls (e.g.
+   ``SYS_READC``) can block execution indefinitely. You should only
+   ever run trusted code with semihosting enabled.
 
 Redirection
 ~~~~~~~~~~~
diff --git a/docs/system/gdb.rst b/docs/system/gdb.rst
index 9906991b84..4228cb56bb 100644
--- a/docs/system/gdb.rst
+++ b/docs/system/gdb.rst
@@ -60,7 +60,7 @@ As TCG cannot track all memory accesses in user-mode there is no
 support for watchpoints.
 
 Relocating code
----------------
+===============
 
 On modern kernels confusion can be caused by code being relocated by
 features such as address space layout randomisation. To avoid
@@ -68,6 +68,17 @@ confusion when debugging such things you either need to update gdb's
 view of where things are in memory or perhaps more trivially disable
 ASLR when booting the system.
 
+Debugging user-space in system emulation
+========================================
+
+While it is technically possible to debug a user-space program running
+inside a system image, it does present challenges. Kernel preemption
+and execution mode changes between kernel and user mode can make it
+hard to follow what's going on. Unless you are specifically trying to
+debug some interaction between kernel and user-space you are better
+off running your guest program with gdb either in the guest or using
+a gdbserver exposed via a port to the outside world.
+
 Debugging multicore machines
 ============================