Commit 7a5fbc9b authored by Fenghua Yu's avatar Fenghua Yu Committed by Borislav Petkov
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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: default avatarAshok Raj <ashok.raj@intel.com>
Suggested-by: default avatarJacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: default avatarFenghua Yu <fenghua.yu@intel.com>
Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
Reviewed-by: default avatarTony Luck <tony.luck@intel.com>
Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
Reviewed-by: default avatarLu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20220207230254.3342514-4-fenghua.yu@intel.com
parent 7a853c2d

include/linux/ioasid.h

+9 −0
Original line number Diff line number Diff line
@@ -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 */