diff options
| author |   Fenghua Yu <fenghua.yu@intel.com> | 2022-02-07 15:02:46 -0800 |
|---|---|---|
| committer |   Borislav Petkov <bp@suse.de> | 2022-02-14 19:41:39 +0100 |
| commit | 7a5fbc9bcba5325a45297a4ba00091f39a63a1ed (patch) | |
| tree | c723c6ba5b9da209e94577a9c5e363c3b550cc34 | |
| parent | mm: Change CONFIG option for mm->pasid field (diff) | |
| download | linux-dev-7a5fbc9bcba5325a45297a4ba00091f39a63a1ed.tar.xz linux-dev-7a5fbc9bcba5325a45297a4ba00091f39a63a1ed.zip | |
iommu/ioasid: Introduce a helper to check for valid PASIDs
Define a pasid_valid() helper to check if a given PASID is valid.
[ bp: Massage commit message. ]
Suggested-by: Ashok Raj <ashok.raj@intel.com>
Suggested-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20220207230254.3342514-4-fenghua.yu@intel.com
| -rw-r--r-- | include/linux/ioasid.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/ioasid.h b/include/linux/ioasid.h index e9dacd4b9f6b..2237f64dbaae 100644 --- a/include/linux/ioasid.h +++ b/include/linux/ioasid.h @@ -41,6 +41,10 @@ void *ioasid_find(struct ioasid_set *set, ioasid_t ioasid, int ioasid_register_allocator(struct ioasid_allocator_ops *allocator); void ioasid_unregister_allocator(struct ioasid_allocator_ops *allocator); int ioasid_set_data(ioasid_t ioasid, void *data); +static inline bool pasid_valid(ioasid_t ioasid) +{ + return ioasid != INVALID_IOASID; +} #else /* !CONFIG_IOASID */ static inline ioasid_t ioasid_alloc(struct ioasid_set *set, ioasid_t min, @@ -78,5 +82,10 @@ static inline int ioasid_set_data(ioasid_t ioasid, void *data) return -ENOTSUPP; } +static inline bool pasid_valid(ioasid_t ioasid) +{ + return false; +} + #endif /* CONFIG_IOASID */ #endif /* __LINUX_IOASID_H */ |