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ef61f8a340
Add a more versatile memmap= operator, which -- in addition to all the things that were possible before -- allows you to: - redeclare existing ranges -- before, you were limited to adding ranges; - drop any range -- like a mem= for any location; - use any e820 memory type -- not just some predefined ones. The syntax is: memmap=<size>%<offset>-<oldtype>+<newtype> Size and offset work as usual. The "-<oldtype>" and "+<newtype>" are optional and their existence determine the behavior: The command works on the specified range of memory limited to type <oldtype> (if specified). This memory is then configured to show up as <newtype>. If <newtype> is not specified, the memory is removed from the e820 map. Signed-off-by: Jan H. Schönherr <jschoenh@amazon.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: Andy Shevchenko <andy.shevchenko@gmail.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20180202231020.15608-1-jschoenh@amazon.de Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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