Introduce vcpu_setup_user_mode() to support vcpu run in user mode.
Signed-off-by: Zeng Guang guang.zeng@intel.com --- .../selftests/kvm/include/x86_64/processor.h | 1 + .../selftests/kvm/lib/x86_64/processor.c | 19 +++++++++++++++++++ 2 files changed, 20 insertions(+)
diff --git a/tools/testing/selftests/kvm/include/x86_64/processor.h b/tools/testing/selftests/kvm/include/x86_64/processor.h index 9c8224c80664..2534bdf8aa71 100644 --- a/tools/testing/selftests/kvm/include/x86_64/processor.h +++ b/tools/testing/selftests/kvm/include/x86_64/processor.h @@ -800,6 +800,7 @@ static inline void cpu_relax(void) struct kvm_x86_state *vcpu_save_state(struct kvm_vcpu *vcpu); void vcpu_load_state(struct kvm_vcpu *vcpu, struct kvm_x86_state *state); void kvm_x86_state_cleanup(struct kvm_x86_state *state); +void vcpu_setup_user_mode(struct kvm_vcpu *vcpu, void *guest_code);
const struct kvm_msr_list *kvm_get_msr_index_list(void); const struct kvm_msr_list *kvm_get_feature_msr_index_list(void); diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c index 7647c3755ca2..c84292b35f2d 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c @@ -1071,6 +1071,25 @@ void vcpu_load_state(struct kvm_vcpu *vcpu, struct kvm_x86_state *state) vcpu_nested_state_set(vcpu, &state->nested); }
+void vcpu_setup_user_mode(struct kvm_vcpu *vcpu, void *guest_code) +{ + struct kvm_sregs sregs; + struct kvm_regs regs; + struct kvm_vm *vm = vcpu->vm; + + vcpu_sregs_get(vcpu, &sregs); + kvm_seg_set_code_64bit(vm, USER_CODE_SELECTOR, &sregs.cs); + kvm_seg_set_data_64bit(vm, USER_DATA_SELECTOR, &sregs.ds); + kvm_seg_set_data_64bit(vm, USER_DATA_SELECTOR, &sregs.es); + kvm_seg_set_data_64bit(vm, USER_DATA_SELECTOR, &sregs.ss); + vcpu_sregs_set(vcpu, &sregs); + + vcpu_regs_get(vcpu, ®s); + regs.rsp = vcpu->stack_vaddr - (DEFAULT_STACK_PGS >> 1) * getpagesize(); + regs.rip = (unsigned long) guest_code; + vcpu_regs_set(vcpu, ®s); +} + void kvm_x86_state_cleanup(struct kvm_x86_state *state) { free(state->xsave);