docs/about/deprecated: Mark HAXM in QEMU as deprecated

The HAXM project has been retired (see https://github.com/intel/haxm#status

),
so we should mark the code in QEMU as deprecated (and finally remove it
unless somebody else picks the project up again - which is quite unlikely
since there are now whpx and hvf on these operating systems, too).

Message-Id: <20230126121034.1035138-1-thuth@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

docs/about/deprecated.rst

@@ -93,6 +93,12 @@ form is preferred.
 The HPET setting has been turned into a machine property.
 Use ``-machine hpet=off`` instead.
 
+``-accel hax`` (since 8.0)
+''''''''''''''''''''''''''
+
+The HAXM project has been retired (see https://github.com/intel/haxm#status).
+Use "whpx" (on Windows) or "hvf" (on macOS) instead.
+
 
 QEMU Machine Protocol (QMP) commands
 ------------------------------------

target/i386/hax/hax-all.c

@@ -357,6 +357,9 @@ static int hax_accel_init(MachineState *ms)
         fprintf(stdout, "HAX is %s and emulator runs in %s mode.\n",
                 !ret ? "working" : "not working",
                 !ret ? "fast virt" : "emulation");
+        fprintf(stdout,
+                "NOTE: HAX is deprecated and will be removed in a future release.\n"
+                "      Use 'whpx' (on Windows) or 'hvf' (on macOS) instead.\n");
     }
     return ret;
 }