Hey Alex, On Sat, Jul 22, 2023 at 02:38:45PM +0200, Alexandre Ghiti wrote: > The following KASLR implementation allows to randomize the kernel mapping: > > - virtually: we expect the bootloader to provide a seed in the device-tree > - physically: only implemented in the EFI stub, it relies on the firmware to > provide a seed using EFI_RNG_PROTOCOL. arm64 has a similar implementation > hence the patch 3 factorizes KASLR related functions for riscv to take > advantage. > > The new virtual kernel location is limited by the early page table that only > has one PUD and with the PMD alignment constraint, the kernel can only take > < 512 positions. I gave this all a go today, it seems to do what it it says on the tin, and crashing my kernel does dump out an offset etc. Tested-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx> I'll hopefully get some time later in the week to go through the code. Cheers, Conor.
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