Loongson Binary Translation (LBT) is used to accelerate binary translation, which contains 4 scratch registers (scr0 to scr3), x86/ARM eflags (eflags) and x87 fpu stack pointer (ftop). Like FPU extension, here late enabling method is used for LBT. LBT context is saved/restored on vcpu context switch path. Also this patch set BT capability detection, and BT register get/set interface for userspace vmm, so that vm supports migration with BT extension. Bibo Mao (3): LoongArch: KVM: Add HW Binary Translation extension support LoongArch: KVM: Add LBT feature detection with cpucfg LoongArch: KVM: Add vm migration support for LBT feature arch/loongarch/include/asm/kvm_host.h | 8 ++ arch/loongarch/include/asm/kvm_vcpu.h | 10 ++ arch/loongarch/include/uapi/asm/kvm.h | 7 ++ arch/loongarch/kvm/exit.c | 9 ++ arch/loongarch/kvm/vcpu.c | 168 +++++++++++++++++++++++++- 5 files changed, 201 insertions(+), 1 deletion(-) base-commit: f4345f05c0dfc73c617e66f3b809edb8ddd41075 -- 2.39.3
