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From: amd-gfx <amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> on behalf of StDenis, Tom <Tom.StDenis@xxxxxxx>
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 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@xxxxxxxxxx <ndesaulniers@xxxxxxxxxx> 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: https://gcc.gnu.org/onlinedocs/gccint/Soft-float-library-routines.html Link: https://github.com/ClangBuiltLinux/linux/issues/327 Cc: stable@xxxxxxxxxxxxxxx # 4.19 Reported-by: S, Shirish <Shirish.S@xxxxxxx> Reported-by: Matthias Kaehlcke <mka@xxxxxxxxxx> Suggested-by: James Y Knight <jyknight@xxxxxxxxxx> Suggested-by: Nathan Chancellor <natechancellor@xxxxxxxxx> Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx> Tested-by: Guenter Roeck <linux@xxxxxxxxxxxx> Tested-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx> Tested-by: Nathan Chancellor <natechancellor@xxxxxxxxx> Reviewed-by: Harry Wentland <harry.wentland@xxxxxxx> Signed-off-by: Harry Wentland <harry.wentland@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> :040000 040000 39f89ea177b8a69a3a2aa098aef8b1a7e58056b9 71edb262be0608ffae0996253f47492b2e714b5c M drivers Cheers, Tom |
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