On Wed, 2025-04-30 at 16:23 -0400, Maxim Levitsky wrote: > This is a continuation of my 'extract > lock_all_vcpus/unlock_all_vcpus' > patch series. > > Implement the suggestion of using lockdep's "nest_lock" feature > when locking all KVM vCPUs by adding mutex_trylock_nest_lock() and > mutex_lock_killable_nest_lock() and use these functions in the > implementation of the > kvm_trylock_all_vcpus()/kvm_lock_all_vcpus()/kvm_unlock_all_vcpus(). > > Those changes allow removal of a custom workaround that was needed to > silence the lockdep warning in the SEV code and also stop lockdep > from > complaining in case of ARM and RISC-V code which doesn't include the > above > mentioned workaround. > > Finally, it's worth noting that this patch series removes a fair > amount of duplicate code by implementing the logic in one place. > > Best regards, > Maxim Levitsky > > Maxim Levitsky (4): > arm64: KVM: use mutex_trylock_nest_lock when locking all vCPUs > RISC-V: KVM: switch to kvm_lock/unlock_all_vcpus > locking/mutex: implement mutex_lock_killable_nest_lock > x86: KVM: SEV: implement kvm_lock_all_vcpus and use it > > arch/arm64/include/asm/kvm_host.h | 3 -- > arch/arm64/kvm/arch_timer.c | 4 +- > arch/arm64/kvm/arm.c | 43 ---------------- > arch/arm64/kvm/vgic/vgic-init.c | 4 +- > arch/arm64/kvm/vgic/vgic-its.c | 8 +-- > arch/arm64/kvm/vgic/vgic-kvm-device.c | 12 ++--- > arch/riscv/kvm/aia_device.c | 34 +------------ > arch/x86/kvm/svm/sev.c | 72 ++----------------------- > -- > include/linux/kvm_host.h | 4 ++ > include/linux/mutex.h | 17 +++++-- > kernel/locking/mutex.c | 7 +-- > virt/kvm/kvm_main.c | 59 ++++++++++++++++++++++ > 12 files changed, 100 insertions(+), 167 deletions(-) > > -- > 2.46.0 > > I forgot to send first patch in the series, resending. Best regards, Maxim Levitsky
