KVM_FEATURE_VIRT_EXTIOI is paravirt feature defined with EXTIOI interrupt controller, it can route interrupt to 256 CPUs and cpu Interrupt Pin 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. --- v3 ... v4: 1. Implement function kvm_para_has_feature() on LoongArch platform, and redefine feature with normal number rather than bitmap number, since function kvm_para_has_feature() requires this. 2. Add extioi virt extension support in this patch set. 3. Update extioi virt extension support patch with review comments, including documentation, using kvm_para_has_feature() to detect features etc. 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 (3): LoongArch: KVM: Enable paravirt feature control from VMM LoongArch: KVM: Implement function kvm_para_has_feature irqchip/loongson-eiointc: Add extioi virt extension support .../arch/loongarch/irq-chip-model.rst | 64 ++++++++++ .../zh_CN/arch/loongarch/irq-chip-model.rst | 55 +++++++++ arch/loongarch/include/asm/irq.h | 1 + arch/loongarch/include/asm/kvm_host.h | 7 ++ 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 | 5 + arch/loongarch/include/uapi/asm/kvm_para.h | 24 ++++ arch/loongarch/kernel/paravirt.c | 32 ++--- arch/loongarch/kvm/exit.c | 6 +- arch/loongarch/kvm/vcpu.c | 41 ++++++- arch/loongarch/kvm/vm.c | 43 ++++++- drivers/irqchip/irq-loongson-eiointc.c | 109 ++++++++++++++---- 14 files changed, 355 insertions(+), 58 deletions(-) create mode 100644 arch/loongarch/include/uapi/asm/kvm_para.h base-commit: 8400291e289ee6b2bf9779ff1c83a291501f017b -- 2.39.3
