From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:58810) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bGNnq-0000fm-4i for qemu-devel@nongnu.org; Fri, 24 Jun 2016 05:53:38 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bGNno-0003IU-3v for qemu-devel@nongnu.org; Fri, 24 Jun 2016 05:53:33 -0400 Received: from mail-lf0-x22c.google.com ([2a00:1450:4010:c07::22c]:35390) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bGNnn-0003HO-SD for qemu-devel@nongnu.org; Fri, 24 Jun 2016 05:53:32 -0400 Received: by mail-lf0-x22c.google.com with SMTP id l188so111651288lfe.2 for ; Fri, 24 Jun 2016 02:53:31 -0700 (PDT) From: riku.voipio@linaro.org Date: Fri, 24 Jun 2016 12:53:01 +0300 Message-Id: In-Reply-To: References: Subject: [Qemu-devel] [PULL 06/24] configure: Don't allow user-only targets for unknown CPU architectures List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Peter Maydell From: Peter Maydell For the user-only targets, we need to know something about the host CPU architecture even if we are using the TCI interpreter rather than TCG. (In particular user-exec.c has code for handling signals that needs to know about that host's context structures.) Specifically forbid building the user-only targets on unknown CPU architectures, rather than allowing them to configure but then fail when building user-exec.c. This change drops supports for two configurations which were theoretically possible before: * linux-user targets on M68K hosts using TCI * linux-user targets on HPPA hosts using TCI We don't think anybody is actually trying to use these in practice, though: * interpreted TCG on a slow host CPU would be unusably slow * the m68k user-exec.c support is missing is_write detection so guest code which writes to the same page it is executing from was broken (will include any guest program using signals) * HPPA TCG backend support was dropped two and a half years ago with no complaints Signed-off-by: Peter Maydell Reviewed-by: Laurent Vivier Reviewed-by: Richard Henderson Signed-off-by: Riku Voipio --- configure | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/configure b/configure index 6696316..dce20f0 100755 --- a/configure +++ b/configure @@ -1216,6 +1216,13 @@ esac QEMU_CFLAGS="$CPU_CFLAGS $QEMU_CFLAGS" EXTRA_CFLAGS="$CPU_CFLAGS $EXTRA_CFLAGS" +# For user-mode emulation the host arch has to be one we explicitly +# support, even if we're using TCI. +if [ "$ARCH" = "unknown" ]; then + bsd_user="no" + linux_user="no" +fi + default_target_list="" mak_wilds="" -- 2.1.4