diff options
| author | Steffen Eiden <seiden@linux.ibm.com> | 2023-08-15 17:14:13 +0200 |
|---|---|---|
| committer | Janosch Frank <frankja@linux.ibm.com> | 2023-08-28 09:27:55 +0000 |
| commit | 59a881402cc89788652fa2c2ce7421d14f131c34 (patch) | |
| tree | b6a1e233fbadcddeb920cd325bb95dc561637ab2 /arch/s390/include | |
| parent | b1e428615f154c87a94267b67e819644b50948f8 (diff) | |
s390/uv: UV feature check utility
Introduces a function to check the existence of an UV feature.
Refactor feature bit checks to use the new function.
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Michael Mueller <mimu@linux.ibm.com>
Link: https://lore.kernel.org/r/20230815151415.379760-3-seiden@linux.ibm.com
Message-Id: <20230815151415.379760-3-seiden@linux.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/uv.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/s390/include/asm/uv.h b/arch/s390/include/asm/uv.h index d2cd42bb2c26..823adfff7315 100644 --- a/arch/s390/include/asm/uv.h +++ b/arch/s390/include/asm/uv.h @@ -397,6 +397,13 @@ struct uv_info { extern struct uv_info uv_info; +static inline bool uv_has_feature(u8 feature_bit) +{ + if (feature_bit >= sizeof(uv_info.uv_feature_indications) * 8) + return false; + return test_bit_inv(feature_bit, &uv_info.uv_feature_indications); +} + #ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST extern int prot_virt_guest; |