diff options
Diffstat (limited to 'tools/testing/selftests/kvm/lib/riscv/processor.c')
-rw-r--r-- | tools/testing/selftests/kvm/lib/riscv/processor.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/lib/riscv/processor.c b/tools/testing/selftests/kvm/lib/riscv/processor.c index 6905a4348380..7ca736fb4194 100644 --- a/tools/testing/selftests/kvm/lib/riscv/processor.c +++ b/tools/testing/selftests/kvm/lib/riscv/processor.c @@ -393,3 +393,22 @@ struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0, return ret; } + +bool guest_sbi_probe_extension(int extid, long *out_val) +{ + struct sbiret ret; + + ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_PROBE_EXT, extid, + 0, 0, 0, 0, 0); + + __GUEST_ASSERT(!ret.error || ret.error == SBI_ERR_NOT_SUPPORTED, + "ret.error=%ld, ret.value=%ld\n", ret.error, ret.value); + + if (ret.error == SBI_ERR_NOT_SUPPORTED) + return false; + + if (out_val) + *out_val = ret.value; + + return true; +} |