diff options
Diffstat (limited to 'drivers/iommu/intel/cap_audit.h')
| -rw-r--r-- | drivers/iommu/intel/cap_audit.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/drivers/iommu/intel/cap_audit.h b/drivers/iommu/intel/cap_audit.h new file mode 100644 index 000000000..d07b75938 --- /dev/null +++ b/drivers/iommu/intel/cap_audit.h @@ -0,0 +1,131 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * cap_audit.h - audit iommu capabilities header + * + * Copyright (C) 2021 Intel Corporation + * + * Author: Kyung Min Park <kyung.min.park@intel.com> + */ + +/* + * Capability Register Mask + */ +#define CAP_FL5LP_MASK BIT_ULL(60) +#define CAP_PI_MASK BIT_ULL(59) +#define CAP_FL1GP_MASK BIT_ULL(56) +#define CAP_RD_MASK BIT_ULL(55) +#define CAP_WD_MASK BIT_ULL(54) +#define CAP_MAMV_MASK GENMASK_ULL(53, 48) +#define CAP_NFR_MASK GENMASK_ULL(47, 40) +#define CAP_PSI_MASK BIT_ULL(39) +#define CAP_SLLPS_MASK GENMASK_ULL(37, 34) +#define CAP_FRO_MASK GENMASK_ULL(33, 24) +#define CAP_ZLR_MASK BIT_ULL(22) +#define CAP_MGAW_MASK GENMASK_ULL(21, 16) +#define CAP_SAGAW_MASK GENMASK_ULL(12, 8) +#define CAP_CM_MASK BIT_ULL(7) +#define CAP_PHMR_MASK BIT_ULL(6) +#define CAP_PLMR_MASK BIT_ULL(5) +#define CAP_RWBF_MASK BIT_ULL(4) +#define CAP_AFL_MASK BIT_ULL(3) +#define CAP_NDOMS_MASK GENMASK_ULL(2, 0) + +/* + * Extended Capability Register Mask + */ +#define ECAP_RPS_MASK BIT_ULL(49) +#define ECAP_SMPWC_MASK BIT_ULL(48) +#define ECAP_FLTS_MASK BIT_ULL(47) +#define ECAP_SLTS_MASK BIT_ULL(46) +#define ECAP_SLADS_MASK BIT_ULL(45) +#define ECAP_VCS_MASK BIT_ULL(44) +#define ECAP_SMTS_MASK BIT_ULL(43) +#define ECAP_PDS_MASK BIT_ULL(42) +#define ECAP_DIT_MASK BIT_ULL(41) +#define ECAP_PASID_MASK BIT_ULL(40) +#define ECAP_PSS_MASK GENMASK_ULL(39, 35) +#define ECAP_EAFS_MASK BIT_ULL(34) +#define ECAP_NWFS_MASK BIT_ULL(33) +#define ECAP_SRS_MASK BIT_ULL(31) +#define ECAP_ERS_MASK BIT_ULL(30) +#define ECAP_PRS_MASK BIT_ULL(29) +#define ECAP_NEST_MASK BIT_ULL(26) +#define ECAP_MTS_MASK BIT_ULL(25) +#define ECAP_MHMV_MASK GENMASK_ULL(23, 20) +#define ECAP_IRO_MASK GENMASK_ULL(17, 8) +#define ECAP_SC_MASK BIT_ULL(7) +#define ECAP_PT_MASK BIT_ULL(6) +#define ECAP_EIM_MASK BIT_ULL(4) +#define ECAP_DT_MASK BIT_ULL(2) +#define ECAP_QI_MASK BIT_ULL(1) +#define ECAP_C_MASK BIT_ULL(0) + +/* + * u64 intel_iommu_cap_sanity, intel_iommu_ecap_sanity will be adjusted as each + * IOMMU gets audited. + */ +#define DO_CHECK_FEATURE_MISMATCH(a, b, cap, feature, MASK) \ +do { \ + if (cap##_##feature(a) != cap##_##feature(b)) { \ + intel_iommu_##cap##_sanity &= ~(MASK); \ + pr_info("IOMMU feature %s inconsistent", #feature); \ + } \ +} while (0) + +#define CHECK_FEATURE_MISMATCH(a, b, cap, feature, MASK) \ + DO_CHECK_FEATURE_MISMATCH((a)->cap, (b)->cap, cap, feature, MASK) + +#define CHECK_FEATURE_MISMATCH_HOTPLUG(b, cap, feature, MASK) \ +do { \ + if (cap##_##feature(intel_iommu_##cap##_sanity)) \ + DO_CHECK_FEATURE_MISMATCH(intel_iommu_##cap##_sanity, \ + (b)->cap, cap, feature, MASK); \ +} while (0) + +#define MINIMAL_FEATURE_IOMMU(iommu, cap, MASK) \ +do { \ + u64 min_feature = intel_iommu_##cap##_sanity & (MASK); \ + min_feature = min_t(u64, min_feature, (iommu)->cap & (MASK)); \ + intel_iommu_##cap##_sanity = (intel_iommu_##cap##_sanity & ~(MASK)) | \ + min_feature; \ +} while (0) + +#define MINIMAL_FEATURE_HOTPLUG(iommu, cap, feature, MASK, mismatch) \ +do { \ + if ((intel_iommu_##cap##_sanity & (MASK)) > \ + (cap##_##feature((iommu)->cap))) \ + mismatch = true; \ + else \ + (iommu)->cap = ((iommu)->cap & ~(MASK)) | \ + (intel_iommu_##cap##_sanity & (MASK)); \ +} while (0) + +enum cap_audit_type { + CAP_AUDIT_STATIC_DMAR, + CAP_AUDIT_STATIC_IRQR, + CAP_AUDIT_HOTPLUG_DMAR, + CAP_AUDIT_HOTPLUG_IRQR, +}; + +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) +{ + return (intel_iommu_sm && intel_cap_smts_sanity()); +} + +static inline bool pasid_mode_support(void) +{ + return scalable_mode_support() && intel_cap_pasid_sanity(); +} + +static inline bool nested_mode_support(void) +{ + return scalable_mode_support() && intel_cap_nest_sanity(); +} + +int intel_cap_audit(enum cap_audit_type type, struct intel_iommu *iommu); |