<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> <style type="text/css" style="display:none;"></style> </head> <body dir="ltr"> <div id="divtagdefaultwrapper" style="font-size:12pt;color:#000000;font-family:Calibri,Helvetica,sans-serif;" dir="ltr"> See: <a href="https://bugs.freedesktop.org/show_bug.cgi?id=109487" class="OWAAutoLink" id="LPlnk459832" previewremoved="true">https://bugs.freedesktop.org/show_bug.cgi?id=109487</a> </div> <hr style="display:inline-block;width:98%" tabindex="-1"> <div id="divRplyFwdMsg" dir="ltr">From: amd-gfx <amd-gfx-bounces@lists.freedesktop.org> on behalf of StDenis, Tom <Tom.StDenis@amd.com> Sent: Tuesday, January 29, 2019 8:44:03 AM To: Wentland, Harry; amd-gfx mailing list Cc: Deucher, Alexander Subject: regression in dcn linked to -msse2 <div> </div> </div> <div class="BodyFragment"> <div class="PlainText">Testing with the new 5.0.0-rc1 amd-staging-drm-next branch results in this commit causing the attached lockup on init with my Raven + Polaris system: 10117450735c7a7c0858095fb46a860e7037cb9a is the first bad commit commit 10117450735c7a7c0858095fb46a860e7037cb9a Author: ndesaulniers@google.com <ndesaulniers@google.com> Date: Thu Jan 24 16:52:59 2019 -0800 drm/amd/display: add -msse2 to prevent Clang from emitting libcalls to undefined SW FP routines arch/x86/Makefile disables SSE and SSE2 for the whole kernel. The AMDGPU drivers modified in this patch re-enable SSE but not SSE2. Turn on SSE2 to support emitting double precision floating point instructions rather than calls to non-existent (usually available from gcc_s or compiler_rt) floating point helper routines. Link: <a href="https://gcc.gnu.org/onlinedocs/gccint/Soft-float-library-routines.html">https://gcc.gnu.org/onlinedocs/gccint/Soft-float-library-routines.html</a> Link: <a href="https://github.com/ClangBuiltLinux/linux/issues/327">https://github.com/ClangBuiltLinux/linux/issues/327</a> Cc: stable@vger.kernel.org # 4.19 Reported-by: S, Shirish <Shirish.S@amd.com> Reported-by: Matthias Kaehlcke <mka@google.com> Suggested-by: James Y Knight <jyknight@google.com> Suggested-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Guenter Roeck <linux@roeck-us.net> Tested-by: Matthias Kaehlcke <mka@chromium.org> Tested-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> :040000 040000 39f89ea177b8a69a3a2aa098aef8b1a7e58056b9 71edb262be0608ffae0996253f47492b2e714b5c M drivers Cheers, Tom </div> </div> </body> </html>