softmmu: remove deprecated --enable-fips option

Users requiring FIPS support must build QEMU with either the libgcrypt
or gnutls libraries as the crytography backend.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

docs/about/deprecated.rst

@@ -67,18 +67,6 @@ and will cause a warning.
 The replacement for the ``nodelay`` short-form boolean option is ``nodelay=on``
 rather than ``delay=off``.
 
-``--enable-fips`` (since 6.0)
-'''''''''''''''''''''''''''''
-
-This option restricts usage of certain cryptographic algorithms when
-the host is operating in FIPS mode.
-
-If FIPS compliance is required, QEMU should be built with the ``libgcrypt``
-library enabled as a cryptography provider.
-
-Neither the ``nettle`` library, or the built-in cryptography provider are
-supported on FIPS enabled hosts.
-
 ``-writeconfig`` (since 6.0)
 '''''''''''''''''''''''''''''
 

docs/about/removed-features.rst

@@ -336,6 +336,17 @@ for the RISC-V ``virt`` machine and ``sifive_u`` machine.
 The ``-no-quit`` was a synonym for ``-display ...,window-close=off`` which
 should be used instead.
 
+``--enable-fips`` (removed in 7.1)
+''''''''''''''''''''''''''''''''''
+
+This option restricted usage of certain cryptographic algorithms when
+the host is operating in FIPS mode.
+
+If FIPS compliance is required, QEMU should be built with the ``libgcrypt``
+or ``gnutls`` library enabled as a cryptography provider.
+
+Neither the ``nettle`` library, or the built-in cryptography provider are
+supported on FIPS enabled hosts.
 
 QEMU Machine Protocol (QMP) commands
 ------------------------------------

include/qemu/osdep.h

@@ -553,9 +553,6 @@ int qemu_pipe(int pipefd[2]);
 
 void qemu_set_cloexec(int fd);
 
-void fips_set_state(bool requested);
-bool fips_get_state(void);
-
 /* Return a dynamically allocated directory path that is appropriate for storing
  * local state.
  *

os-posix.c

@@ -150,14 +150,6 @@ int os_parse_cmd_args(int index, const char *optarg)
     case QEMU_OPTION_daemonize:
         daemonize = 1;
         break;
-#if defined(CONFIG_LINUX)
-    case QEMU_OPTION_enablefips:
-        warn_report("-enable-fips is deprecated, please build QEMU with "
-                    "the `libgcrypt` library as the cryptography provider "
-                    "to enable FIPS compliance");
-        fips_set_state(true);
-        break;
-#endif
     default:
         return -1;
     }

qemu-options.hx

@@ -4673,16 +4673,6 @@ HXCOMM Internal use
 DEF("qtest", HAS_ARG, QEMU_OPTION_qtest, "", QEMU_ARCH_ALL)
 DEF("qtest-log", HAS_ARG, QEMU_OPTION_qtest_log, "", QEMU_ARCH_ALL)
 
-#ifdef __linux__
-DEF("enable-fips", 0, QEMU_OPTION_enablefips,
-    "-enable-fips    enable FIPS 140-2 compliance\n",
-    QEMU_ARCH_ALL)
-#endif
-SRST
-``-enable-fips``
-    Enable FIPS 140-2 compliance mode.
-ERST
-
 DEF("msg", HAS_ARG, QEMU_OPTION_msg,
     "-msg [timestamp[=on|off]][,guest-name=[on|off]]\n"
     "                control error message format\n"

ui/vnc.c

@@ -4059,13 +4059,6 @@ void vnc_display_open(const char *id, Error **errp)
         password = qemu_opt_get_bool(opts, "password", false);
     }
     if (password) {
-        if (fips_get_state()) {
-            error_setg(errp,
-                       "VNC password auth disabled due to FIPS mode, "
-                       "consider using the VeNCrypt or SASL authentication "
-                       "methods as an alternative");
-            goto fail;
-        }
         if (!qcrypto_cipher_supports(
                 QCRYPTO_CIPHER_ALG_DES, QCRYPTO_CIPHER_MODE_ECB)) {
             error_setg(errp,

util/osdep.c

@@ -31,8 +31,6 @@
 #include "qemu/hw-version.h"
 #include "monitor/monitor.h"
 
-static bool fips_enabled = false;
-
 static const char *hw_version = QEMU_HW_VERSION;
 
 int socket_set_cork(int fd, int v)
@@ -514,32 +512,6 @@ const char *qemu_hw_version(void)
     return hw_version;
 }
 
-void fips_set_state(bool requested)
-{
-#ifdef __linux__
-    if (requested) {
-        FILE *fds = fopen("/proc/sys/crypto/fips_enabled", "r");
-        if (fds != NULL) {
-            fips_enabled = (fgetc(fds) == '1');
-            fclose(fds);
-        }
-    }
-#else
-    fips_enabled = false;
-#endif /* __linux__ */
-
-#ifdef _FIPS_DEBUG
-    fprintf(stderr, "FIPS mode %s (requested %s)\n",
-            (fips_enabled ? "enabled" : "disabled"),
-            (requested ? "enabled" : "disabled"));
-#endif
-}
-
-bool fips_get_state(void)
-{
-    return fips_enabled;
-}
-
 #ifdef _WIN32
 static void socket_cleanup(void)
 {