From: Alexandru Elisei Date: Mon, 11 Oct 2021 15:38:35 +0000 (+0100) Subject: Documentation: admin-guide: Document side effects when pKVM is enabled X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=53e8ce137f7b34bd7a54429d18e0d0e5f56f54e8;p=linux.git Documentation: admin-guide: Document side effects when pKVM is enabled Recent changes to KVM for arm64 has made it impossible for the host to hibernate or use kexec when protected mode is enabled via the kernel command line. There are people who rely on kexec (for example, developers who use kexec as a quick way to test a new kernel), let's document this change in behaviour, so it doesn't catch them by surprise and we have a place to point people to if it does. Signed-off-by: Alexandru Elisei Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20211011153835.291147-1-alexandru.elisei@arm.com --- diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 91ba391f9b328..741e33fd444ae 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -2372,7 +2372,9 @@ state is kept private from the host. Not valid if the kernel is running in EL2. - Defaults to VHE/nVHE based on hardware support. + Defaults to VHE/nVHE based on hardware support. Setting + mode to "protected" will disable kexec and hibernation + for the host. kvm-arm.vgic_v3_group0_trap= [KVM,ARM] Trap guest accesses to GICv3 group-0