Since 4.18, KVM/ARM exposes a KVM_MAX_VCPUS equal to 512. However it was reported [1] that a VM with more than 256 vcpus cannot be launched. 5.4 fixes the situation with 2 patches: - one upgrade of the KVM_IRQ_LINE API [2] supporting a vcpu id encoded on 12 bits, - the reduction of KVM IO devices consumed by each GICv3 redistributor [3]
This series uses the new KVM_IRQ_LINE API and also checks the associated capability (KVM_CAP_ARM_IRQ_LINE_LAYOUT_2) in machvirt. Without the series, as soon as the -smp arguments exceeds 256, QEMU exits with "kvm_set_irq: Invalid argument". Best Regards Eric This series can be found at: https://github.com/eauger/qemu/tree/v4.1.0-256fix-patch-v4 History: v3 -> v4: - headers update against v5.4-rc1 - moved to patch as the kernel dependencies are resolved in 5.4 - Added Richard and Drew's R-b v2 -> v3: - simplifications in kvm_arm_gic_set_irq - Implement KVM_CAP_ARM_IRQ_LINE_LAYOUT_2 check in kvm_arch_init v1 -> v2: - New layout set for kvm_arm_gic_set_irq and arm_cpu_kvm_set_irq through kvm_arm_set_irq - Introduced kvm_arm_irq_line_layout_mismatch() Eric Auger (3): linux headers: update against v5.4-rc1 intc/arm_gic: Support IRQ injection for more than 256 vpus ARM: KVM: Check KVM_CAP_ARM_IRQ_LINE_LAYOUT_2 for smp_cpus > 256 hw/intc/arm_gic_kvm.c | 7 +- include/standard-headers/asm-x86/bootparam.h | 2 + include/standard-headers/asm-x86/kvm_para.h | 1 + include/standard-headers/linux/ethtool.h | 24 +++ include/standard-headers/linux/pci_regs.h | 19 +- include/standard-headers/linux/virtio_fs.h | 19 ++ include/standard-headers/linux/virtio_ids.h | 2 + include/standard-headers/linux/virtio_iommu.h | 165 ++++++++++++++++++ include/standard-headers/linux/virtio_pmem.h | 6 +- linux-headers/asm-arm/kvm.h | 16 +- linux-headers/asm-arm/unistd-common.h | 2 + linux-headers/asm-arm64/kvm.h | 21 ++- linux-headers/asm-generic/mman-common.h | 18 +- linux-headers/asm-generic/mman.h | 10 +- linux-headers/asm-generic/unistd.h | 10 +- linux-headers/asm-mips/mman.h | 3 + linux-headers/asm-mips/unistd_n32.h | 1 + linux-headers/asm-mips/unistd_n64.h | 1 + linux-headers/asm-mips/unistd_o32.h | 1 + linux-headers/asm-powerpc/mman.h | 6 +- linux-headers/asm-powerpc/unistd_32.h | 2 + linux-headers/asm-powerpc/unistd_64.h | 2 + linux-headers/asm-s390/kvm.h | 6 + linux-headers/asm-s390/unistd_32.h | 2 + linux-headers/asm-s390/unistd_64.h | 2 + linux-headers/asm-x86/kvm.h | 28 ++- linux-headers/asm-x86/unistd.h | 2 +- linux-headers/asm-x86/unistd_32.h | 2 + linux-headers/asm-x86/unistd_64.h | 2 + linux-headers/asm-x86/unistd_x32.h | 2 + linux-headers/linux/kvm.h | 12 +- linux-headers/linux/psp-sev.h | 5 +- linux-headers/linux/vfio.h | 71 +++++--- target/arm/cpu.c | 10 +- target/arm/kvm.c | 22 ++- target/arm/kvm_arm.h | 1 + 36 files changed, 434 insertions(+), 71 deletions(-) create mode 100644 include/standard-headers/linux/virtio_fs.h create mode 100644 include/standard-headers/linux/virtio_iommu.h -- 2.20.1
