From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EE0B73D988 for ; Sat, 24 Feb 2024 12:16:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708776972; cv=none; b=u053Gdx03//Pn+CAwXaD/8As7D5f8RbJhi9V6uZWDxMdF/llzqTgPeQaEk8b1VhF84nwvGk5XbM2OEsntGuZCONqfc1x+v274HW6V49X2/4sKY+8dimIM+zf2ORlLZnc8z3mMw0DTxaC4vOOjFmIyA/O2rxE+TN+VS12AmSJDMU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708776972; c=relaxed/simple; bh=FVqwkjBGiGZ+FrnuOmvhnP6hzKLmcnGCY/w4xZTohpY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=sPS4YZx5U3/C4eZezkzkXOzPNXZZxGuYqulaUwEbB//1N8OdY088lDtCqqGKKt0MvE3qYjv4bsmK+QeTCyQDrSeAhdyURXEM5KevY4rCIc1ioW5HJqfetPuV0Mqz1AOeHQQGg4iBuCXEj5Wkf/Lekegz2RxpP0TWnfqNwS9aI1g= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XjL/ME58; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="XjL/ME58" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C6462C433F1; Sat, 24 Feb 2024 12:16:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1708776971; bh=FVqwkjBGiGZ+FrnuOmvhnP6hzKLmcnGCY/w4xZTohpY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XjL/ME582gBj+PnpaYTcAJdRjWCltO0ujLpFGlmYasM9RQuSkdzve0IpVw+2qvHrb 4oqTU1S+Iep91HOzIAgIb+hHbKAhsa9/b3uTFbcowMuARdI3FpC4SAwzG/DR+zo3CV aPrwkUhUDsQrdBsTyE5lAkwd3Rp5jpwNDIcIfx1X7WaWscenCVj97SVKk16zJe3L5U KF8z9/nNbY+1dQFiuJEnfp/+cJnxufDun68bUW1FNO2I8JVGO3cbkJ12p3x1s3Az1S IjrNd3LUfFkHv4PjvnnH+cDfNE5fHimeCIxJu5w8by24eFIaNEYMXmosPgkoyqsmSS MrYuj+UrUAwKQ== From: Arnd Bergmann To: Lucas De Marchi , Oded Gabbay , =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= Cc: Arnd Bergmann , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Rodrigo Vivi , Matt Roper , Matthew Brost , Himal Prasad Ghimiray , Francois Dugast , Dave Airlie , intel-xe@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/3] drm/xe/xe2: fix 64-bit division in pte_update_size Date: Sat, 24 Feb 2024 13:15:01 +0100 Message-Id: <20240224121528.1972719-3-arnd@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240224121528.1972719-1-arnd@kernel.org> References: <20240224121528.1972719-1-arnd@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Arnd Bergmann This function does not build on 32-bit targets when the compiler fails to reduce DIV_ROUND_UP() into a shift: ld.lld: error: undefined symbol: __aeabi_uldivmod >>> referenced by xe_migrate.c >>> drivers/gpu/drm/xe/xe_migrate.o:(pte_update_size) in archive vmlinux.a There are two instances in this function. Change the first to use an open-coded shift with the same behavior, and the second one to a 32-bit calculation, which is sufficient here as the size is never more than 2^32 pages (16TB). Fixes: ea97a66a2218 ("drm/xe: Disable 32bits build") Signed-off-by: Arnd Bergmann --- drivers/gpu/drm/xe/xe_migrate.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/xe/xe_migrate.c b/drivers/gpu/drm/xe/xe_migrate.c index a66fdf2d2991..ee1bb938c493 100644 --- a/drivers/gpu/drm/xe/xe_migrate.c +++ b/drivers/gpu/drm/xe/xe_migrate.c @@ -462,7 +462,7 @@ static u32 pte_update_size(struct xe_migrate *m, } else { /* Clip L0 to available size */ u64 size = min(*L0, (u64)avail_pts * SZ_2M); - u64 num_4k_pages = DIV_ROUND_UP(size, XE_PAGE_SIZE); + u32 num_4k_pages = (size + XE_PAGE_SIZE - 1) >> XE_PTE_SHIFT; *L0 = size; *L0_ofs = xe_migrate_vm_addr(pt_ofs, 0); -- 2.39.2