diff options
Diffstat (limited to 'tools/testing/selftests/kvm/lib/ucall_common.c')
| -rw-r--r-- | tools/testing/selftests/kvm/lib/ucall_common.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/lib/ucall_common.c b/tools/testing/selftests/kvm/lib/ucall_common.c index 2395c7f1d543..ced480860746 100644 --- a/tools/testing/selftests/kvm/lib/ucall_common.c +++ b/tools/testing/selftests/kvm/lib/ucall_common.c @@ -18,3 +18,22 @@ void ucall(uint64_t cmd, int nargs, ...) ucall_arch_do_ucall((vm_vaddr_t)&uc); } + +uint64_t get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc) +{ + struct ucall ucall; + void *addr; + + if (!uc) + uc = &ucall; + + addr = ucall_arch_get_ucall(vcpu); + if (addr) { + memcpy(uc, addr, sizeof(*uc)); + vcpu_run_complete_io(vcpu); + } else { + memset(uc, 0, sizeof(*uc)); + } + + return uc->cmd; +} |