This patch series add LSX,LASX support for LoongArch KVM. There will be LSX,LASX exception in KVM when guest use the LSX,LASX instructions. KVM will enable LSX,LASX and restore the vector registers for guest then return to guest to continue running. Changes for v4: 1. Supplement vcpu features checking when cpucfg2 is passed from user space. (1) The LLFTP must be set, as guest must has a constant timer. (2) Single and double float point must both be set when enable FP. (3) FP should be set when enable LSX. (4) LSX,FP should be set when enable LASX. Changes for v3: 1. Use KVM_GET_DEVICE_ATTR interface to return CPUCFG2 features which are supported by KVM to user space. 2. Remove version checking in kvm_check_cpucfg. Changes for v2: 1. Add interface to return CPUCFG2 features which have been supported by current KVM to user space. So that user space can get CPU features such as FPU,LSX,LASX whether support by KVM. 2. Add CPUCFG2 checking interface to check that if the value which is passed from user space has any errors. 3. Export both _restore_lsx_upper and _restore_lasx_upper to keep consistency. 4. Use "jr ra" instruction to repalce "jirl zero, ra, 0". Changes for v1: 1. Add LSX support for LoongArch KVM. 2. Add LASX support for LoongArch KVM. Tianrui Zhao (2): LoongArch: KVM: Add LSX support LoongArch: KVM: Add LASX support arch/loongarch/include/asm/kvm_host.h | 17 ++ arch/loongarch/include/asm/kvm_vcpu.h | 22 +++ arch/loongarch/include/uapi/asm/kvm.h | 1 + arch/loongarch/kernel/fpu.S | 2 + arch/loongarch/kvm/exit.c | 37 ++++ arch/loongarch/kvm/switch.S | 36 ++++ arch/loongarch/kvm/trace.h | 6 +- arch/loongarch/kvm/vcpu.c | 271 +++++++++++++++++++++++++- 8 files changed, 386 insertions(+), 6 deletions(-) -- 2.39.1
