Baoquan He <b...@redhat.com> writes: > On 01/30/19 at 05:40pm, Julian Stecklina wrote: >> diff --git a/arch/x86/boot/compressed/kaslr.c >> b/arch/x86/boot/compressed/kaslr.c >> index 9ed9709..5657e34 100644 >> --- a/arch/x86/boot/compressed/kaslr.c >> +++ b/arch/x86/boot/compressed/kaslr.c >> @@ -155,6 +155,12 @@ parse_memmap(char *p, unsigned long long *start, >> unsigned long long *size) >> case '#': >> case '$': >> case '!': >> + /* >> + * % would need some more complex parsing, because regions might >> + * actually become usable for KASLR, but the simple way of >> + * ignoring anything that is mentioned in % works for now. >> + */ > > This seems to make thing more complicated even though have to. One > concern is whether we need to check the oldtype|newtype , e.g > oldtype=reserverd, newtype=RAM, is it possible to set like that?
With the above patch the boot code will avoid using any region targeted by % for KASLR. This does mean regions that are changed to be usable via % are not taken into account. Julian
