meson: Remove cpu == x86 tests

The 32-bit x86 host is no longer supported.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

configure

@@ -447,13 +447,6 @@ case "$cpu" in
     linux_arch=arm64
     ;;
 
-  i386|i486|i586|i686)
-    cpu="i386"
-    host_arch=i386
-    linux_arch=x86
-    CPU_CFLAGS="-m32"
-    ;;
-
   loongarch*)
     cpu=loongarch64
     host_arch=loongarch64
@@ -1944,14 +1937,7 @@ if test "$skip_meson" = no; then
   if test "$cross_compile" = "yes"; then
     echo "[host_machine]" >> $cross
     echo "system = '$host_os'" >> $cross
-    case "$cpu" in
-        i386)
-            echo "cpu_family = 'x86'" >> $cross
-            ;;
-        *)
-            echo "cpu_family = '$cpu'" >> $cross
-            ;;
-    esac
+    echo "cpu_family = '$cpu'" >> $cross
     echo "cpu = '$cpu'" >> $cross
     if test "$bigendian" = "yes" ; then
         echo "endian = 'big'" >> $cross

meson.build

@@ -50,7 +50,7 @@ qapi_trace_events = []
 
 bsd_oses = ['gnu/kfreebsd', 'freebsd', 'netbsd', 'openbsd', 'dragonfly', 'darwin']
 supported_oses = ['windows', 'freebsd', 'netbsd', 'openbsd', 'darwin', 'sunos', 'linux', 'emscripten']
-supported_cpus = ['ppc', 'ppc64', 's390x', 'riscv32', 'riscv64', 'x86', 'x86_64',
+supported_cpus = ['ppc', 'ppc64', 's390x', 'riscv32', 'riscv64', 'x86_64',
   'aarch64', 'loongarch64', 'mips64', 'sparc64', 'wasm64']
 
 cpu = host_machine.cpu_family()
@@ -265,8 +265,6 @@ enable_modules = get_option('modules') \
 
 if cpu not in supported_cpus
   host_arch = 'unknown'
-elif cpu == 'x86'
-  host_arch = 'i386'
 elif cpu == 'mips64'
   host_arch = 'mips'
 elif cpu in ['riscv32', 'riscv64']
@@ -275,9 +273,7 @@ else
   host_arch = cpu
 endif
 
-if cpu == 'x86'
-  kvm_targets = ['i386-softmmu']
-elif cpu == 'x86_64'
+if cpu == 'x86_64'
   kvm_targets = ['i386-softmmu', 'x86_64-softmmu']
 elif cpu == 'aarch64'
   kvm_targets = ['aarch64-softmmu']
@@ -300,9 +296,7 @@ else
 endif
 accelerator_targets = { 'CONFIG_KVM': kvm_targets }
 
-if cpu == 'x86'
-  xen_targets = ['i386-softmmu']
-elif cpu == 'x86_64'
+if cpu == 'x86_64'
   xen_targets = ['i386-softmmu', 'x86_64-softmmu']
 elif cpu == 'aarch64'
   # i386 emulator provides xenpv machine type for multiple architectures
@@ -391,40 +385,17 @@ endif
 
 qemu_isa_flags = []
 
-# __sync_fetch_and_and requires at least -march=i486. Many toolchains
-# use i686 as default anyway, but for those that don't, an explicit
-# specification is necessary
-if host_arch == 'i386' and not cc.links('''
-  static int sfaa(int *ptr)
-  {
-    return __sync_fetch_and_and(ptr, 0);
-  }
-
-  int main(void)
-  {
-    int val = 42;
-    val = __sync_val_compare_and_swap(&val, 0, 1);
-    sfaa(&val);
-    return val;
-  }''')
-  qemu_isa_flags += ['-march=i486']
-endif
-
 # Pick x86-64 baseline version
-if host_arch in ['i386', 'x86_64']
-  if get_option('x86_version') == '0' and host_arch == 'x86_64'
+if host_arch == 'x86_64'
+  if get_option('x86_version') == '0'
     error('x86_64-v1 required for x86-64 hosts')
   endif
 
   # add flags for individual instruction set extensions
   if get_option('x86_version') >= '1'
-    if host_arch == 'i386'
-      qemu_common_flags = ['-mfpmath=sse'] + qemu_common_flags
-    else
-      # present on basically all processors but technically not part of
-      # x86-64-v1, so only include -mneeded for x86-64 version 2 and above
-      qemu_isa_flags += ['-mcx16']
-    endif
+    # present on basically all processors but technically not part of
+    # x86-64-v1, so only include -mneeded for x86-64 version 2 and above
+    qemu_isa_flags += ['-mcx16']
   endif
   if get_option('x86_version') >= '2'
     qemu_isa_flags += ['-mpopcnt']
@@ -1040,7 +1011,7 @@ have_xen_pci_passthrough = get_option('xen_pci_passthrough') \
            error_message: 'Xen PCI passthrough requested but Xen not enabled') \
   .require(host_os == 'linux',
            error_message: 'Xen PCI passthrough not available on this platform') \
-  .require(cpu == 'x86'  or cpu == 'x86_64',
+  .require(cpu == 'x86_64',
            error_message: 'Xen PCI passthrough not available on this platform') \
   .allowed()
 
@@ -4564,7 +4535,7 @@ if have_tools
                               libcap_ng, mpathpersist],
                install: true)
 
-    if cpu in ['x86', 'x86_64']
+    if cpu == 'x86_64'
       executable('qemu-vmsr-helper', files('tools/i386/qemu-vmsr-helper.c'),
                dependencies: [authz, crypto, io, qom, qemuutil,
                               libcap_ng, mpathpersist],