Borislav Petkov <bp@xxxxxxxxx> writes: > On Mon, Sep 13, 2021 at 05:55:52PM +0200, Joerg Roedel wrote: >> From: Joerg Roedel <jroedel@xxxxxxx> >> >> Allow a runtime opt-out of kexec support for architecture code in case >> the kernel is running in an environment where kexec is not properly >> supported yet. >> >> This will be used on x86 when the kernel is running as an SEV-ES >> guest. SEV-ES guests need special handling for kexec to hand over all >> CPUs to the new kernel. This requires special hypervisor support and >> handling code in the guest which is not yet implemented. >> >> Cc: stable@xxxxxxxxxxxxxxx # v5.10+ >> Signed-off-by: Joerg Roedel <jroedel@xxxxxxx> >> --- >> include/linux/kexec.h | 1 + >> kernel/kexec.c | 14 ++++++++++++++ >> kernel/kexec_file.c | 9 +++++++++ >> 3 files changed, 24 insertions(+) > > I guess I can take this through the tip tree along with the next one. I seem to remember the consensus when this was reviewed that it was unnecessary and there is already support for doing something like this at a more fine grained level so we don't need a new kexec hook. Eric
