PV sched supports the vCPU preemption check to enhance lock performance on overcommitted hosts
Zengruan Ye (5): KVM: arm64: Document PV-sched interface KVM: arm64: Implement PV_SCHED_FEATURES call KVM: arm64: Support pvsched preempted via shared structure KVM: arm64: Add interface to support vCPU preempted check KVM: arm64: Support the vCPU preemption check
Documentation/virt/kvm/arm/pvsched.rst | 58 ++++++++++++++ arch/arm64/Kconfig | 11 +++ arch/arm64/configs/openeuler_defconfig | 1 + arch/arm64/include/asm/kvm_host.h | 32 ++++++++ arch/arm64/include/asm/paravirt.h | 11 +++ arch/arm64/include/asm/pvsched-abi.h | 16 ++++ arch/arm64/include/asm/spinlock.h | 8 ++ arch/arm64/kernel/Makefile | 2 +- arch/arm64/kernel/paravirt-spinlocks.c | 16 ++++ arch/arm64/kernel/paravirt.c | 107 +++++++++++++++++++++++++ arch/arm64/kvm/Makefile | 2 +- arch/arm64/kvm/arm.c | 11 +++ arch/arm64/kvm/hypercalls.c | 17 ++++ arch/arm64/kvm/pvsched.c | 54 +++++++++++++ include/linux/arm-smccc.h | 19 +++++ include/linux/cpuhotplug.h | 1 + 16 files changed, 364 insertions(+), 2 deletions(-) create mode 100644 Documentation/virt/kvm/arm/pvsched.rst create mode 100644 arch/arm64/include/asm/pvsched-abi.h create mode 100644 arch/arm64/kernel/paravirt-spinlocks.c create mode 100644 arch/arm64/kvm/pvsched.c