KVM_FEATURE_VIRT_EXTIOI is paravirt feature defined with EXTIOI interrupt controller, it can route interrupt to 256 CPUs and cpu interface IP0-IP7. Now irqchip is emulated in user space rather than kernel space, here interface is provide for VMM to pass it to KVM hyperviso. Also interface is provide to VMM to detect and enable/disable paravirt features provided in KVM hypervisor. --- v2 ... v3: 1. Add interface to detect and enable/disable paravirt features in KVM hypervisor. 2. Implement function kvm_arch_para_features() for device driver in VM side to detected supported paravirt features. v1 ... v2: 1. Update changelog suggested by WangXuerui. 2. Fix typo issue in function kvm_loongarch_cpucfg_set_attr(), usr_features should be assigned directly, also suggested by WangXueRui. --- Bibo Mao (2): LoongArch: KVM: Enable paravirt feature control from VMM LoongArch: KVM: Implement function kvm_arch_para_features arch/loongarch/include/asm/kvm_host.h | 9 +++++ arch/loongarch/include/asm/kvm_para.h | 11 ++++++ arch/loongarch/include/asm/loongarch.h | 13 ------- arch/loongarch/include/uapi/asm/Kbuild | 2 -- arch/loongarch/include/uapi/asm/kvm.h | 2 ++ arch/loongarch/include/uapi/asm/kvm_para.h | 24 +++++++++++++ arch/loongarch/kernel/paravirt.c | 22 ++++++++---- arch/loongarch/kvm/exit.c | 4 +-- arch/loongarch/kvm/vcpu.c | 41 +++++++++++++++++++--- arch/loongarch/kvm/vm.c | 12 +++++++ 10 files changed, 111 insertions(+), 29 deletions(-) create mode 100644 arch/loongarch/include/uapi/asm/kvm_para.h base-commit: c33ffdb70cc6df4105160f991288e7d2567d7ffa -- 2.39.3
