On Tue, Apr 09, 2024 at 10:25:33PM +0000, Luck, Tony wrote: > >> I forgot to mention that this makes it trivial for any machine that doesn't > >> clear memory on soft-reboot, to enable console ramoops (to have access to > >> the last boot dmesg without needing serial). > >> > >> I tested this on a couple of my test boxes and on QEMU, and it works rather > >> well. > > > > I've long wanted a "stable for this machine and kernel" memory region > > like this for pstore. It would make testing much easier. > > Which systems does this work on? I'd assume that servers (and anything > else with ECC memory) would nuke contents while resetting ECC to clean > state. Do ECC servers wipe their RAM by default? I know that if you build with CONFIG_RESET_ATTACK_MITIGATION=y on an EFI system that supports the MemoryOverwriteRequestControl EFI variable you'll get a RAM wipe... -- Kees Cook
