diff options
| author | Andrew Jones <ajones@ventanamicro.com> | 2023-12-20 19:00:24 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2023-12-30 08:56:43 +0300 |
| commit | 945d880d6be0fd19bbc77d80d113bd2ca74c74f8 (patch) | |
| tree | 3bf303d123003aed86dfb6292f24e59748f993c1 /tools/testing/selftests/kvm/lib | |
| parent | 0dcab5c4762ac166aa7e635ae4b6d649e15717e2 (diff) | |
| download | linux-945d880d6be0fd19bbc77d80d113bd2ca74c74f8.tar.xz | |
RISC-V: KVM: selftests: Add guest_sbi_probe_extension
Add guest_sbi_probe_extension(), allowing guest code to probe for
SBI extensions. As guest_sbi_probe_extension() needs
SBI_ERR_NOT_SUPPORTED, take the opportunity to bring in all SBI
error codes. We don't bring in all current extension IDs or base
extension function IDs though, even though we need one of each,
because we'd prefer to bring those in as necessary.
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
Diffstat (limited to 'tools/testing/selftests/kvm/lib')
| -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; +} |