Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752024AbaKKSoH (ORCPT ); Tue, 11 Nov 2014 13:44:07 -0500 Received: from mga01.intel.com ([192.55.52.88]:15362 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751678AbaKKSoA (ORCPT ); Tue, 11 Nov 2014 13:44:00 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,862,1389772800"; d="scan'208";a="414941173" From: Ross Zwisler To: linux-kernel@vger.kernel.org Cc: Ross Zwisler , H Peter Anvin , Ingo Molnar , Thomas Gleixner , David Airlie , dri-devel@lists.freedesktop.org, x86@kernel.org Subject: [PATCH 6/6] x86: Use clwb in drm_clflush_virt_range Date: Tue, 11 Nov 2014 11:43:16 -0700 Message-Id: <1415731396-19364-7-git-send-email-ross.zwisler@linux.intel.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1415731396-19364-1-git-send-email-ross.zwisler@linux.intel.com> References: <1415731396-19364-1-git-send-email-ross.zwisler@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If clwb is available on the system, use it in drm_clflush_virt_range. If clwb is not available, fall back to clflushopt if you can. If clflushopt is not supported, fall all the way back to clflush. Signed-off-by: Ross Zwisler Cc: H Peter Anvin Cc: Ingo Molnar Cc: Thomas Gleixner Cc: David Airlie Cc: dri-devel@lists.freedesktop.org Cc: x86@kernel.org --- drivers/gpu/drm/drm_cache.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/drm_cache.c b/drivers/gpu/drm/drm_cache.c index aad9d82..84e9a04 100644 --- a/drivers/gpu/drm/drm_cache.c +++ b/drivers/gpu/drm/drm_cache.c @@ -138,8 +138,8 @@ drm_clflush_virt_range(void *addr, unsigned long length) void *end = addr + length; mb(); for (; addr < end; addr += boot_cpu_data.x86_clflush_size) - clflushopt(addr); - clflushopt(end - 1); + clwb(addr); + clwb(end - 1); mb(); return; } -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/