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([2a02:908:1252:fb60:7140:364b:3af8:f004]) by smtp.gmail.com with ESMTPSA id d9sm1237820wrb.36.2021.09.09.01.04.59 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 09 Sep 2021 01:05:00 -0700 (PDT) Subject: Re: [PATCH 0/4] Fix stack usage of DML To: Harry Wentland , amd-gfx@lists.freedesktop.org Cc: ndesaulniers@google.com, torvalds@linux-foundation.org, linux-kernel@vger.kernel.org, arnd@kernel.org, sunpeng.li@amd.com, alexander.deucher@amd.com, christian.koenig@amd.com, Xinhui.Pan@amd.com, nathan@kernel.org, linux@roeck-us.net, llvm@lists.linux.dev References: <20210909010023.29110-1-harry.wentland@amd.com> From: =?UTF-8?Q?Christian_K=c3=b6nig?= Message-ID: <76749a45-64e9-c478-cf93-ac7a26b48cd8@gmail.com> Date: Thu, 9 Sep 2021 10:04:58 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 MIME-Version: 1.0 In-Reply-To: <20210909010023.29110-1-harry.wentland@amd.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" It's nice to see at least some of them addressed, feel free to add an Acked-by: Christian König Regards, Christian. Am 09.09.21 um 03:00 schrieb Harry Wentland: > With the '-Werror' enablement patch the amdgpu build was failing > on clang builds because a bunch of functions were blowing past > the 1024 byte stack frame default. Due to this we also noticed > that a lot of functions were passing large structs by value > instead of by pointer. > > This series attempts to fix this. > > There is still one remaining function that blows the 1024 limit by 40 bytes: > > drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn21/display_mode_vba_21.c:3397:6: > > error: stack frame size of 1064 bytes in function > 'dml21_ModeSupportAndSystemConfigurationFull' [-Werror,-Wframe-larger-than=] > > This will be a slightly more challenging fix but I'll see if we can get it > below 1024 by breaking it into smaller functions. > > With this series I can build amdgpu with CC=clang and a stack frame limit of > 1064. > > This series boots on a Radeon RX 5500 XT. > > Harry Wentland (4): > drm/amd/display: Pass display_pipe_params_st as const in DML > drm/amd/display: Pass all structs in display_rq_dlg_helpers by pointer > drm/amd/display: Fix rest of pass-by-value structs in DML > drm/amd/display: Allocate structs needed by dcn_bw_calc_rq_dlg_ttu in > pipe_ctx > > .../gpu/drm/amd/display/dc/calcs/dcn_calcs.c | 55 ++-- > .../drm/amd/display/dc/dcn20/dcn20_resource.c | 2 +- > .../dc/dml/dcn20/display_rq_dlg_calc_20.c | 158 +++++------ > .../dc/dml/dcn20/display_rq_dlg_calc_20.h | 4 +- > .../dc/dml/dcn20/display_rq_dlg_calc_20v2.c | 156 +++++------ > .../dc/dml/dcn20/display_rq_dlg_calc_20v2.h | 4 +- > .../dc/dml/dcn21/display_rq_dlg_calc_21.c | 156 +++++------ > .../dc/dml/dcn21/display_rq_dlg_calc_21.h | 4 +- > .../dc/dml/dcn30/display_rq_dlg_calc_30.c | 132 ++++----- > .../dc/dml/dcn30/display_rq_dlg_calc_30.h | 4 +- > .../dc/dml/dcn31/display_rq_dlg_calc_31.c | 166 ++++++------ > .../dc/dml/dcn31/display_rq_dlg_calc_31.h | 4 +- > .../drm/amd/display/dc/dml/display_mode_lib.h | 4 +- > .../display/dc/dml/display_rq_dlg_helpers.c | 256 +++++++++--------- > .../display/dc/dml/display_rq_dlg_helpers.h | 20 +- > .../display/dc/dml/dml1_display_rq_dlg_calc.c | 246 ++++++++--------- > .../display/dc/dml/dml1_display_rq_dlg_calc.h | 10 +- > .../gpu/drm/amd/display/dc/inc/core_types.h | 3 + > 18 files changed, 695 insertions(+), 689 deletions(-) >