diff options
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/intel/cap_audit.c | 13 | ||||
| -rw-r--r-- | drivers/iommu/intel/cap_audit.h | 1 |
2 files changed, 14 insertions, 0 deletions
diff --git a/drivers/iommu/intel/cap_audit.c b/drivers/iommu/intel/cap_audit.c index b12e421a2f1a..b39d223926a4 100644 --- a/drivers/iommu/intel/cap_audit.c +++ b/drivers/iommu/intel/cap_audit.c @@ -163,6 +163,14 @@ static int cap_audit_static(struct intel_iommu *iommu, enum cap_audit_type type) check_irq_capabilities(iommu, i); } + /* + * If the system is sane to support scalable mode, either SL or FL + * should be sane. + */ + if (intel_cap_smts_sanity() && + !intel_cap_flts_sanity() && !intel_cap_slts_sanity()) + return -EOPNOTSUPP; + out: rcu_read_unlock(); return 0; @@ -203,3 +211,8 @@ bool intel_cap_flts_sanity(void) { return ecap_flts(intel_iommu_ecap_sanity); } + +bool intel_cap_slts_sanity(void) +{ + return ecap_slts(intel_iommu_ecap_sanity); +} diff --git a/drivers/iommu/intel/cap_audit.h b/drivers/iommu/intel/cap_audit.h index 74cfccae0e81..d07b75938961 100644 --- a/drivers/iommu/intel/cap_audit.h +++ b/drivers/iommu/intel/cap_audit.h @@ -111,6 +111,7 @@ bool intel_cap_smts_sanity(void); bool intel_cap_pasid_sanity(void); bool intel_cap_nest_sanity(void); bool intel_cap_flts_sanity(void); +bool intel_cap_slts_sanity(void); static inline bool scalable_mode_support(void) { |