On Sat, 13 May 2023 00:31:25 +0100, Sean Christopherson <seanjc@xxxxxxxxxx> wrote: > > Fix a bug where enabling hardware virtualization can race with a forced > reboot, e.g. `reboot -f`, and result in virt hardware being enabled when > the reboot is attempted, and thus hanging the reboot. > > Found by inspection, confirmed by hacking the reboot flow to wait until > KVM loads (the problematic window is ridiculously small). > > Fully tested only on x86, compile tested on other architectures. > > v2: > - Rename KVM's callback to kvm_shutdown() to match the hook. [Marc] > - Don't add a spurious newline. [Marc] > > v1: https://lore.kernel.org/all/20230310221414.811690-1-seanjc@xxxxxxxxxx > > Sean Christopherson (2): > KVM: Use syscore_ops instead of reboot_notifier to hook > restart/shutdown > KVM: Don't enable hardware after a restart/shutdown is initiated > > virt/kvm/kvm_main.c | 43 +++++++++++++++++++++++++++---------------- > 1 file changed, 27 insertions(+), 16 deletions(-) Acked-by: Marc Zyngier <maz@xxxxxxxxxx> M. -- Without deviation from the norm, progress is not possible.
