On Tue, Jun 30, 2015 at 12:46:19PM -0700, Bjorn Andersson wrote:
<snip>
> While adding the 64 bit interface it might be of interest to extract the dma
> allocation in __qcom_scm_pas_init_image() into the common code and pass the
> physical pointer to instead, but I haven't looked at the differences to the 64
> bit interface.
I am currently delving into this. I'll take this patch and see what needs to be
done.
<snip>
> +int __qcom_scm_pas_init_image(u32 peripheral, const void *metadata, size_t size)
> +{
> + dma_addr_t mdata_phys;
> + void *mdata_buf;
> + u32 scm_ret;
> + int ret;
> + struct pas_init_image_req {
> + u32 proc;
> + u32 image_addr;
> + } request;
> +
> + /*
> + * During the scm call memory protection will be enabled for the meta
> + * data blob, so make sure it's physically contiguous, 4K aligned and
> + * non-cachable to avoid XPU violations.
> + */
> + mdata_buf = dma_alloc_coherent(NULL, size, &mdata_phys, GFP_KERNEL);
Not sure this gives you a 4k aligned buffer every time.
<snip>
Otherwise everything looks fine to me.
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