target/nios2: Remove the deprecated Nios II target

The Nios II target is deprecated since v8.2 in commit 9997771
("target/nios2: Deprecate the Nios II architecture").

Remove:
- Buildsys / CI infra
- User emulation
- System emulation (10m50-ghrd & nios2-generic-nommu machines)
- Tests

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Marek Vasut <marex@denx.de>
Message-Id: <20240327144806.11319-3-philmd@linaro.org>

.gitlab-ci.d/buildtest.yml

@@ -164,7 +164,7 @@ build-system-centos:
     CONFIGURE_ARGS: --disable-nettle --enable-gcrypt --enable-vfio-user-server
       --enable-modules --enable-trace-backends=dtrace --enable-docs
     TARGETS: ppc64-softmmu or1k-softmmu s390x-softmmu
-      x86_64-softmmu rx-softmmu sh4-softmmu nios2-softmmu
+      x86_64-softmmu rx-softmmu sh4-softmmu
     MAKE_CHECK_ARGS: check-build
 
 # Previous QEMU release. Used for cross-version migration tests.
@@ -254,7 +254,7 @@ avocado-system-centos:
     IMAGE: centos8
     MAKE_CHECK_ARGS: check-avocado
     AVOCADO_TAGS: arch:ppc64 arch:or1k arch:s390x arch:x86_64 arch:rx
-      arch:sh4 arch:nios2
+      arch:sh4
 
 build-system-opensuse:
   extends:

.gitlab-ci.d/crossbuild-template.yml

@@ -72,7 +72,7 @@
     - ../configure --enable-werror --disable-docs $QEMU_CONFIGURE_OPTS
         --disable-system --target-list-exclude="aarch64_be-linux-user
           alpha-linux-user cris-linux-user m68k-linux-user microblazeel-linux-user
-          nios2-linux-user or1k-linux-user ppc-linux-user sparc-linux-user
+          or1k-linux-user ppc-linux-user sparc-linux-user
           xtensa-linux-user $CROSS_SKIP_TARGETS"
     - make -j$(expr $(nproc) + 1) all check-build $MAKE_CHECK_ARGS
 

.gitlab-ci.d/crossbuilds.yml

@@ -167,7 +167,7 @@ cross-win64-system:
     IMAGE: fedora-win64-cross
     EXTRA_CONFIGURE_OPTS: --enable-fdt=internal --disable-plugins
     CROSS_SKIP_TARGETS: alpha-softmmu avr-softmmu hppa-softmmu
-                        m68k-softmmu microblazeel-softmmu nios2-softmmu
+                        m68k-softmmu microblazeel-softmmu
                         or1k-softmmu rx-softmmu sh4eb-softmmu sparc64-softmmu
                         tricore-softmmu xtensaeb-softmmu
   artifacts:

MAINTAINERS

@@ -291,19 +291,6 @@ F: disas/*mips.c
 F: docs/system/cpu-models-mips.rst.inc
 F: tests/tcg/mips/
 
-NiosII TCG CPUs
-R: Chris Wulff <crwulff@gmail.com>
-R: Marek Vasut <marex@denx.de>
-S: Orphan
-F: target/nios2/
-F: hw/nios2/
-F: hw/intc/nios2_vic.c
-F: disas/nios2.c
-F: include/hw/intc/nios2_vic.h
-F: configs/devices/nios2-softmmu/default.mak
-F: tests/docker/dockerfiles/debian-nios2-cross.d/build-toolchain.sh
-F: tests/tcg/nios2/
-
 OpenRISC TCG CPUs
 M: Stafford Horne <shorne@gmail.com>
 S: Odd Fixes

configure

@@ -1169,7 +1169,6 @@ fi
 : ${cross_prefix_mips64="mips64-linux-gnuabi64-"}
 : ${cross_prefix_mipsel="mipsel-linux-gnu-"}
 : ${cross_prefix_mips="mips-linux-gnu-"}
-: ${cross_prefix_nios2="nios2-linux-gnu-"}
 : ${cross_prefix_ppc="powerpc-linux-gnu-"}
 : ${cross_prefix_ppc64="powerpc64-linux-gnu-"}
 : ${cross_prefix_ppc64le="$cross_prefix_ppc64"}
@@ -1258,7 +1257,6 @@ probe_target_compiler() {
     mips64) container_hosts=x86_64 ;;
     mipsel) container_hosts=x86_64 ;;
     mips) container_hosts=x86_64 ;;
-    nios2) container_hosts=x86_64 ;;
     ppc) container_hosts=x86_64 ;;
     ppc64|ppc64le) container_hosts=x86_64 ;;
     riscv64) container_hosts=x86_64 ;;

disas/meson.build

@@ -5,7 +5,6 @@ common_ss.add(when: 'CONFIG_HPPA_DIS', if_true: files('hppa.c'))
 common_ss.add(when: 'CONFIG_M68K_DIS', if_true: files('m68k.c'))
 common_ss.add(when: 'CONFIG_MICROBLAZE_DIS', if_true: files('microblaze.c'))
 common_ss.add(when: 'CONFIG_MIPS_DIS', if_true: files('mips.c', 'nanomips.c'))
-common_ss.add(when: 'CONFIG_NIOS2_DIS', if_true: files('nios2.c'))
 common_ss.add(when: 'CONFIG_RISCV_DIS', if_true: files(
     'riscv.c',
     'riscv-xthead.c',