On Mon, Jan 23, 2023 at 11:51:35AM +0100, Alexandre Ghiti wrote: > Add 2 early command line parameters that allow to downgrade satp mode > (using the same naming as x86): > - "no5lvl": use a 4-level page table (down from sv57 to sv48) > - "no4lvl": use a 3-level page table (down from sv57/sv48 to sv39) > > Note that going through the device tree to get the kernel command line > works with ACPI too since the efi stub creates a device tree anyway with > the command line. > > Also, as those params are treated very early in the boot process and we > use standard device tree functions that may be kasan instrumented, we > only enable them for !KASAN configurations. > > Reviewed-by: Björn Töpel <bjorn@xxxxxxxxxx> > Signed-off-by: Alexandre Ghiti <alexghiti@xxxxxxxxxxxx> > --- > > v3: > - Massage commit log to make no4lvl clearer, as asked by Conor > - Add a note to kernel-parameters.txt regarding the impossibility to use > those parameters when KASAN is enabled, as suggested by Conor For the improved descriptions & commit message: Reviewed-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx> Apologies for complaining about the missing changelog earlier! Conor.
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