From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bjorn Andersson Subject: [PATCH 2/5] soc: qcom: smem: Use write-combine remap for SMEM Date: Mon, 28 Mar 2016 21:35:23 -0700 Message-ID: <1459226126-16725-2-git-send-email-bjorn.andersson@linaro.org> References: <1459226126-16725-1-git-send-email-bjorn.andersson@linaro.org> Return-path: Received: from mail-pf0-f182.google.com ([209.85.192.182]:35915 "EHLO mail-pf0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751141AbcC2Efa (ORCPT ); Tue, 29 Mar 2016 00:35:30 -0400 Received: by mail-pf0-f182.google.com with SMTP id u190so4833630pfb.3 for ; Mon, 28 Mar 2016 21:35:30 -0700 (PDT) In-Reply-To: <1459226126-16725-1-git-send-email-bjorn.andersson@linaro.org> Sender: linux-arm-msm-owner@vger.kernel.org List-Id: linux-arm-msm@vger.kernel.org To: Andy Gross Cc: linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org, linux-kernel@vger.kernel.org Mapping the SMEM region as write combine makes the contiguous writes in SMD perform better and also allows us to do unaligned read and writes on ARM64. Signed-off-by: Bjorn Andersson --- drivers/soc/qcom/smem.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/soc/qcom/smem.c b/drivers/soc/qcom/smem.c index 19019aa092e8..2e1aa9f130f4 100644 --- a/drivers/soc/qcom/smem.c +++ b/drivers/soc/qcom/smem.c @@ -684,8 +684,7 @@ static int qcom_smem_map_memory(struct qcom_smem *smem, struct device *dev, smem->regions[i].aux_base = (u32)r.start; smem->regions[i].size = resource_size(&r); - smem->regions[i].virt_base = devm_ioremap_nocache(dev, r.start, - resource_size(&r)); + smem->regions[i].virt_base = devm_ioremap_wc(dev, r.start, resource_size(&r)); if (!smem->regions[i].virt_base) return -ENOMEM; -- 2.5.0