On 11/4/22 04:29, Coiby Xu wrote:
> + if (kexec_crash_image->luks_volume_key_addr) {
> + start = kexec_crash_image->luks_volume_key_addr;
> + end = start + kexec_crash_image->luks_volume_key_sz - 1;
> + page = pfn_to_page(start >> PAGE_SHIFT);
> + nr_pages = (end >> PAGE_SHIFT) - (start >> PAGE_SHIFT) + 1;
> + set_memory_np((unsigned long)page_address(page), nr_pages);
> + }
Why does this go pfn -> page -> vaddr? What good does having the page
do? Can you just do phys_to_virt() on the start address? Maybe:
start_paddr = kexec_crash_image->luks_volume_key_addr;
end_paddr = start_paddr + kexec_crash_image->luks_volume_key_sz - 1;
nr_pages = (PAGE_ALIGN(end_paddr) - PAGE_ALIGN_DOWN(start_paddr))/
PAGE_SIZE;
set_memory_np((unsigned long)phys_to_virt(start_paddr), nr_pages);
Also, if you resend this, please just cc the x86 folks on the series.
The other patches and cover letter have desperately needed context
around this.
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