+Adrian On Tue, Apr 08, 2025, Maxim Levitsky wrote: > Implement Paolo's suggestion of reusing Ha! I *knew* this felt familiar when I suggested extracting (un)lock_all_vcpus() to common code in the context of the TDX series. https://lore.kernel.org/all/Z-V0qyTn2bXdrPF7@xxxxxxxxxx > sev_lock/unlock_vcpus_for_migration in arm and riscv code > for the purpose of taking vcpu->mutex of all vcpus of a VM. > > Because sev_lock/unlock_vcpus_for_migration already have a workaround > for lockdep max lock depth, this fixes the lockdep warnings on arm > which were the inspiration for this refactoring. > > This patch series was only compile tested on all 3 architectures. > > V2: added trylock option to kvm_lock_all_vcpus to be better compatible > with the orginal code. > > Best regards, > Maxim Levitsky > > Maxim Levitsky (4): > locking/mutex: implement mutex_trylock_nested > KVM: x86: move sev_lock/unlock_vcpus_for_migration to kvm_main.c > KVM: arm64: switch to using kvm_lock/unlock_all_vcpus > RISC-V: KVM: switch to kvm_lock/unlock_all_vcpus > > 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 | 65 ++---------------------- > include/linux/kvm_host.h | 6 +++ > include/linux/mutex.h | 8 +++ > kernel/locking/mutex.c | 14 ++++-- > virt/kvm/kvm_main.c | 71 +++++++++++++++++++++++++++ > 12 files changed, 116 insertions(+), 156 deletions(-) > > -- > 2.26.3 > >
