From: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxx> This patchset adds API for saving and restoring of VGICv3 registers to support live migration with new vgic feature. This API definition is as per version of VGICv3 specification http://lists.infradead.org/pipermail/linux-arm-kernel/2016-July/445611.html To test live migration with QEMU, use below patch series https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg01444.html The patch 3 & 4 are picked from the Pavel's previous implementation. http://www.spinics.net/lists/kvm/msg122040.html v2 => v3: - Implemented separate API for ISPENDR and ICPENDR to read soft_pending instead of pending for level triggerred interrupts - Implemented ioctl KVM_DEV_ARM_VGIC_GRP_LEVEL_INFO to access line level - Rebased on top of Christoffer's patch set http://www.spinics.net/lists/kvm/msg136840.html NOTE: GICD_STATUSR and GICR_STATUSR are implemented as RAZ/WI. v1 => v2: - The init sequence change patch is no more required. Fixed in patch 2 by using static vgic_io_dev regions structure instead of using dynamic allocation pointer. - Updated commit message of patch 4. - Dropped usage of union to manage 32-bit and 64-bit access in patch 1. Used local variable for 32-bit access. - Updated macro __ARM64_SYS_REG and ARM64_SYS_REG in arch/arm64/include/uapi/asm/kvm.h as per qemu requirements. Vijaya Kumar K (5): arm/arm64: vgic-new: Implement support for userspace access arm/arm64: vgic-new: Add distributor and redistributor access arm/arm64: vgic-new: Introduce find_reg_by_id() arm/arm64: vgic-new: Implement VGICv3 CPU interface access arm/arm64: vgic-new: Implement KVM_DEV_ARM_VGIC_GRP_LEVEL_INFO ioctl arch/arm64/include/uapi/asm/kvm.h | 24 +++- arch/arm64/kvm/Makefile | 1 + arch/arm64/kvm/sys_regs.c | 22 ++-- arch/arm64/kvm/sys_regs.h | 4 + include/linux/irqchip/arm-gic-v3.h | 4 + virt/kvm/arm/vgic/vgic-kvm-device.c | 198 ++++++++++++++++++++++++++++++++- virt/kvm/arm/vgic/vgic-mmio-v2.c | 9 +- virt/kvm/arm/vgic/vgic-mmio-v3.c | 178 ++++++++++++++++++++++++++++-- virt/kvm/arm/vgic/vgic-mmio.c | 123 +++++++++++++++++++-- virt/kvm/arm/vgic/vgic-mmio.h | 31 ++++++ virt/kvm/arm/vgic/vgic-sys-reg-v3.c | 211 ++++++++++++++++++++++++++++++++++++ virt/kvm/arm/vgic/vgic.h | 17 +++ 12 files changed, 789 insertions(+), 33 deletions(-) create mode 100644 virt/kvm/arm/vgic/vgic-sys-reg-v3.c -- 1.9.1 _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
