soc: qcom: smem: Use write-combine remap for SMEM

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 <bjorn.andersson@linaro.org>
Reviewed-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

diff --git a/drivers/soc/qcom/smem.c b/drivers/soc/qcom/smem.c
index 19019aa092e86d76ad5a24b80f34616b9e38e320..2e1aa9f130f4d860ea7c57994ba3f1302c2e7072 100644 (file)
--- 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;