diff options
Diffstat (limited to 'drivers/iommu/intel/cap_audit.c')
| -rw-r--r-- | drivers/iommu/intel/cap_audit.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/iommu/intel/cap_audit.c b/drivers/iommu/intel/cap_audit.c index b12e421a2f1a..71596fc62822 100644 --- a/drivers/iommu/intel/cap_audit.c +++ b/drivers/iommu/intel/cap_audit.c @@ -144,6 +144,7 @@ static int cap_audit_static(struct intel_iommu *iommu, enum cap_audit_type type) { struct dmar_drhd_unit *d; struct intel_iommu *i; + int rc = 0; rcu_read_lock(); if (list_empty(&dmar_drhd_units)) @@ -163,9 +164,17 @@ 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()) + rc = -EOPNOTSUPP; + out: rcu_read_unlock(); - return 0; + return rc; } int intel_cap_audit(enum cap_audit_type type, struct intel_iommu *iommu) @@ -203,3 +212,8 @@ 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); +} |