Hi, While testing KVM running on PREEMPT_RT, starting guest could simply freeze the machine. This is because we are using spinlocks for VGIC locks, which is invalid in the VGIC case since the locks must be take with interrupts disabled. The solution is to use raw_spinlock instead of spinlocks. Changes since v2[1]: - Rebase on v5.0-rc1 - Remove first patch from series as it has been applied Changes since v1[2]: - Rebase on v4.20-rc4 - Add Christoffer's Acked-by - Fix potential lock up when waiting for vcpus to halt [1] https://lkml.org/lkml/2018/11/27/20 [2] https://lkml.org/lkml/2018/11/19/776 Cheers, Julien --> Julien Thierry (3): KVM: arm/arm64: vgic: Make vgic_irq->irq_lock a raw_spinlock KVM: arm/arm64: vgic: Make vgic_dist->lpi_list_lock a raw_spinlock KVM: arm/arm64: vgic: Make vgic_cpu->ap_list_lock a raw_spinlock include/kvm/arm_vgic.h | 6 +- virt/kvm/arm/vgic/vgic-debug.c | 4 +- virt/kvm/arm/vgic/vgic-init.c | 8 +-- virt/kvm/arm/vgic/vgic-its.c | 22 ++++---- virt/kvm/arm/vgic/vgic-mmio-v2.c | 14 ++--- virt/kvm/arm/vgic/vgic-mmio-v3.c | 12 ++-- virt/kvm/arm/vgic/vgic-mmio.c | 34 +++++------ virt/kvm/arm/vgic/vgic-v2.c | 4 +- virt/kvm/arm/vgic/vgic-v3.c | 8 +-- virt/kvm/arm/vgic/vgic.c | 118 +++++++++++++++++++-------------------- 10 files changed, 115 insertions(+), 115 deletions(-) -- 1.9.1 _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
