Messages in this thread | | | From | Mark-PK Tsai <> | Subject | remoteproc: rproc_va_to_pa returns invalid physical address when using sparse memory model | Date | Mon, 8 Nov 2021 17:48:08 +0800 |
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On my arm platform with CONFIG_SPARSEMEM=y, when the virtual address comes from ioremap, which map to a reserved memory region, rproc_va_to_pa returns a invalid address. (no iommu)
It's because the corresponding struct page and section not present. And then __page_to_pfn read the page->flags in the returned page which is actually an invalid address. (When CONFIG_SPARSMEM=y && CONFIG_SPARSEMEM_VMEMMAP=n, kernel get the section the page belong to in flags field.)
I'm looking for suggestion to properly fix this problem. Could you please give us some suggestion?
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