From: Eric Auger <eric.auger@redhat.com>
To: eric.auger.pro@gmail.com, eric.auger@redhat.com,
qemu-devel@nongnu.org, qemu-arm@nongnu.org,
peter.maydell@linaro.org
Cc: yuzenghui@huawei.com, maz@kernel.org
Subject: [PATCH v4 0/3] KVM/ARM: Fix >256 vcpus
Date: Thu, 3 Oct 2019 17:46:37 +0200 [thread overview]
Message-ID: <20191003154640.22451-1-eric.auger@redhat.com> (raw)
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
next reply other threads:[~2019-10-03 15:47 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-03 15:46 Eric Auger [this message]
2019-10-03 15:46 ` [PATCH v4 1/3] linux headers: update against v5.4-rc1 Eric Auger
2019-10-03 15:46 ` [PATCH v4 2/3] intc/arm_gic: Support IRQ injection for more than 256 vpus Eric Auger
2019-10-03 15:46 ` [PATCH v4 3/3] ARM: KVM: Check KVM_CAP_ARM_IRQ_LINE_LAYOUT_2 for smp_cpus > 256 Eric Auger
2019-10-03 17:43 ` [PATCH v4 0/3] KVM/ARM: Fix >256 vcpus Marc Zyngier
2019-10-14 12:48 ` Peter Maydell
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