From: Xiang Chen <chenxiang66@hisilicon.com> virt inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/IBPH85 ------------------------------------------------------------------------ Before IPIV feature, it gets mpidr from vcpu id, but after the feature, we need to know if IPIV mode is enabled. And new IPIV modes may be added later. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: Jinqian Yang <yangjinqian1@huawei.com> --- arch/arm64/kvm/arm.c | 8 ++++++++ include/uapi/linux/kvm.h | 2 ++ 2 files changed, 10 insertions(+) diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 5ba336d1efad..996a7117d709 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -312,6 +312,8 @@ void kvm_arch_destroy_vm(struct kvm *kvm) #endif } +extern struct static_key_false ipiv_enable; + int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) { int r; @@ -436,6 +438,12 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) r = static_key_enabled(&virtcca_cvm_is_available); break; #endif + case KVM_CAP_ARM_IPIV_MODE: + if (static_branch_unlikely(&ipiv_enable)) + r = 1; + else + r = 0; + break; default: r = 0; } diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 1f67e4d6ff7b..870be8fcfacf 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -1201,6 +1201,8 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_ARM_EAGER_SPLIT_CHUNK_SIZE 228 #define KVM_CAP_ARM_SUPPORTED_BLOCK_SIZES 229 +#define KVM_CAP_ARM_IPIV_MODE 301 /* ipiv mode */ + #define KVM_CAP_SEV_ES_GHCB 500 #define KVM_CAP_HYGON_COCO_EXT 501 /* support userspace to request firmware to build CSV3 guest's memory space */ -- 2.33.0