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charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::330; envelope-from=alex.bennee@linaro.org; helo=mail-wm1-x330.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Huth , Richard Henderson , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Wainer dos Santos Moschetta , qemu-devel@nongnu.org, Willian Rampazzo , Alexandre Iooss , Paolo Bonzini , Mahmoud Mandour , =?UTF-8?q?Alex=20Benn=C3=A9e?= Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1626093442475100001 Aside from a minor bloat to file size the ability to have TCG plugins has no real impact on performance unless a plugin is actively loaded. Even then the libempty.so plugin shows only a minor degradation in performance caused by the extra book keeping the TCG has to do to keep track of instructions. As it's a useful feature lets just enable it by default and reduce our testing matrix a little. We need to move our linker testing earlier so we can be sure we can enable the loader module required. As we have ruled out static & plugins in an earlier patch we can also reduce the indent a little. Signed-off-by: Alex Benn=C3=A9e Reviewed-by: Thomas Huth Reviewed-by: Richard Henderson Cc: Paolo Bonzini Message-Id: <20210709143005.1554-33-alex.bennee@linaro.org> diff --git a/docs/devel/tcg-plugins.rst b/docs/devel/tcg-plugins.rst index 18c6581d85..0cd77c77d2 100644 --- a/docs/devel/tcg-plugins.rst +++ b/docs/devel/tcg-plugins.rst @@ -71,7 +71,8 @@ API Usage =3D=3D=3D=3D=3D =20 -The QEMU binary needs to be compiled for plugin support:: +Any QEMU binary with TCG support has plugins enabled by default. +Earlier releases needed to be explicitly enabled with:: =20 configure --enable-plugins =20 diff --git a/configure b/configure index 97ea6e6629..60358529fd 100755 --- a/configure +++ b/configure @@ -429,7 +429,7 @@ libxml2=3D"auto" debug_mutex=3D"no" libpmem=3D"auto" default_devices=3D"true" -plugins=3D"no" +plugins=3D"$default_feature" fuzzing=3D"no" rng_none=3D"no" secret_keyring=3D"$default_feature" @@ -2196,6 +2196,8 @@ if test "$static" =3D "yes" ; then fi if test "$plugins" =3D "yes"; then error_exit "static and plugins are mutually incompatible" + else + plugins=3D"no" fi fi =20 @@ -3089,6 +3091,69 @@ for drv in $audio_drv_list; do esac done =20 +########################################## +# plugin linker support probe + +if test "$plugins" !=3D "no"; then + + ######################################### + # See if --dynamic-list is supported by the linker + + ld_dynamic_list=3D"no" + cat > $TMPTXT < $TMPC < +void foo(void); + +void foo(void) +{ + printf("foo\n"); +} + +int main(void) +{ + foo(); + return 0; +} +EOF + + if compile_prog "" "-Wl,--dynamic-list=3D$TMPTXT" ; then + ld_dynamic_list=3D"yes" + fi + + ######################################### + # See if -exported_symbols_list is supported by the linker + + ld_exported_symbols_list=3D"no" + cat > $TMPTXT < $TMPTXT < $TMPC < -void foo(void); - -void foo(void) -{ - printf("foo\n"); -} - -int main(void) -{ - foo(); - return 0; -} -EOF - - if compile_prog "" "-Wl,--dynamic-list=3D$TMPTXT" ; then - ld_dynamic_list=3D"yes" - fi -fi - -######################################### -# See if -exported_symbols_list is supported by the linker - -ld_exported_symbols_list=3D"no" -if test "$static" =3D "no" ; then - cat > $TMPTXT <