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205 lines
7.8 KiB
205 lines
7.8 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* cap_audit.c - audit iommu capabilities for boot time and hot plug |
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* |
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* Copyright (C) 2021 Intel Corporation |
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* |
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* Author: Kyung Min Park <[email protected]> |
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* Lu Baolu <[email protected]> |
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*/ |
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#define pr_fmt(fmt) "DMAR: " fmt |
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#include <linux/intel-iommu.h> |
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#include "cap_audit.h" |
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static u64 intel_iommu_cap_sanity; |
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static u64 intel_iommu_ecap_sanity; |
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static inline void check_irq_capabilities(struct intel_iommu *a, |
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struct intel_iommu *b) |
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{ |
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CHECK_FEATURE_MISMATCH(a, b, cap, pi_support, CAP_PI_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, eim_support, ECAP_EIM_MASK); |
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} |
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static inline void check_dmar_capabilities(struct intel_iommu *a, |
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struct intel_iommu *b) |
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{ |
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MINIMAL_FEATURE_IOMMU(b, cap, CAP_MAMV_MASK); |
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MINIMAL_FEATURE_IOMMU(b, cap, CAP_NFR_MASK); |
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MINIMAL_FEATURE_IOMMU(b, cap, CAP_SLLPS_MASK); |
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MINIMAL_FEATURE_IOMMU(b, cap, CAP_FRO_MASK); |
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MINIMAL_FEATURE_IOMMU(b, cap, CAP_MGAW_MASK); |
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MINIMAL_FEATURE_IOMMU(b, cap, CAP_SAGAW_MASK); |
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MINIMAL_FEATURE_IOMMU(b, cap, CAP_NDOMS_MASK); |
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MINIMAL_FEATURE_IOMMU(b, ecap, ECAP_PSS_MASK); |
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MINIMAL_FEATURE_IOMMU(b, ecap, ECAP_MHMV_MASK); |
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MINIMAL_FEATURE_IOMMU(b, ecap, ECAP_IRO_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, cap, 5lp_support, CAP_FL5LP_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, cap, fl1gp_support, CAP_FL1GP_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, cap, read_drain, CAP_RD_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, cap, write_drain, CAP_WD_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, cap, pgsel_inv, CAP_PSI_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, cap, zlr, CAP_ZLR_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, cap, caching_mode, CAP_CM_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, cap, phmr, CAP_PHMR_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, cap, plmr, CAP_PLMR_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, cap, rwbf, CAP_RWBF_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, cap, afl, CAP_AFL_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, rps, ECAP_RPS_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, smpwc, ECAP_SMPWC_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, flts, ECAP_FLTS_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, slts, ECAP_SLTS_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, nwfs, ECAP_NWFS_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, slads, ECAP_SLADS_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, vcs, ECAP_VCS_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, smts, ECAP_SMTS_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, pds, ECAP_PDS_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, dit, ECAP_DIT_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, pasid, ECAP_PASID_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, eafs, ECAP_EAFS_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, srs, ECAP_SRS_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, ers, ECAP_ERS_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, prs, ECAP_PRS_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, nest, ECAP_NEST_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, mts, ECAP_MTS_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, sc_support, ECAP_SC_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, pass_through, ECAP_PT_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, dev_iotlb_support, ECAP_DT_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, qis, ECAP_QI_MASK); |
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CHECK_FEATURE_MISMATCH(a, b, ecap, coherent, ECAP_C_MASK); |
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} |
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static int cap_audit_hotplug(struct intel_iommu *iommu, enum cap_audit_type type) |
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{ |
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bool mismatch = false; |
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u64 old_cap = intel_iommu_cap_sanity; |
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u64 old_ecap = intel_iommu_ecap_sanity; |
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if (type == CAP_AUDIT_HOTPLUG_IRQR) { |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, pi_support, CAP_PI_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, eim_support, ECAP_EIM_MASK); |
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goto out; |
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} |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, 5lp_support, CAP_FL5LP_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, fl1gp_support, CAP_FL1GP_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, read_drain, CAP_RD_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, write_drain, CAP_WD_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, pgsel_inv, CAP_PSI_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, zlr, CAP_ZLR_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, caching_mode, CAP_CM_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, phmr, CAP_PHMR_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, plmr, CAP_PLMR_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, rwbf, CAP_RWBF_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, afl, CAP_AFL_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, rps, ECAP_RPS_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, smpwc, ECAP_SMPWC_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, flts, ECAP_FLTS_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, slts, ECAP_SLTS_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, nwfs, ECAP_NWFS_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, slads, ECAP_SLADS_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, vcs, ECAP_VCS_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, smts, ECAP_SMTS_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, pds, ECAP_PDS_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, dit, ECAP_DIT_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, pasid, ECAP_PASID_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, eafs, ECAP_EAFS_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, srs, ECAP_SRS_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, ers, ECAP_ERS_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, prs, ECAP_PRS_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, nest, ECAP_NEST_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, mts, ECAP_MTS_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, sc_support, ECAP_SC_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, pass_through, ECAP_PT_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, dev_iotlb_support, ECAP_DT_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, qis, ECAP_QI_MASK); |
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CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, coherent, ECAP_C_MASK); |
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/* Abort hot plug if the hot plug iommu feature is smaller than global */ |
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MINIMAL_FEATURE_HOTPLUG(iommu, cap, max_amask_val, CAP_MAMV_MASK, mismatch); |
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MINIMAL_FEATURE_HOTPLUG(iommu, cap, num_fault_regs, CAP_NFR_MASK, mismatch); |
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MINIMAL_FEATURE_HOTPLUG(iommu, cap, super_page_val, CAP_SLLPS_MASK, mismatch); |
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MINIMAL_FEATURE_HOTPLUG(iommu, cap, fault_reg_offset, CAP_FRO_MASK, mismatch); |
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MINIMAL_FEATURE_HOTPLUG(iommu, cap, mgaw, CAP_MGAW_MASK, mismatch); |
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MINIMAL_FEATURE_HOTPLUG(iommu, cap, sagaw, CAP_SAGAW_MASK, mismatch); |
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MINIMAL_FEATURE_HOTPLUG(iommu, cap, ndoms, CAP_NDOMS_MASK, mismatch); |
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MINIMAL_FEATURE_HOTPLUG(iommu, ecap, pss, ECAP_PSS_MASK, mismatch); |
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MINIMAL_FEATURE_HOTPLUG(iommu, ecap, max_handle_mask, ECAP_MHMV_MASK, mismatch); |
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MINIMAL_FEATURE_HOTPLUG(iommu, ecap, iotlb_offset, ECAP_IRO_MASK, mismatch); |
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out: |
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if (mismatch) { |
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intel_iommu_cap_sanity = old_cap; |
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intel_iommu_ecap_sanity = old_ecap; |
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return -EFAULT; |
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} |
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return 0; |
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} |
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static int cap_audit_static(struct intel_iommu *iommu, enum cap_audit_type type) |
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{ |
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struct dmar_drhd_unit *d; |
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struct intel_iommu *i; |
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rcu_read_lock(); |
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if (list_empty(&dmar_drhd_units)) |
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goto out; |
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for_each_active_iommu(i, d) { |
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if (!iommu) { |
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intel_iommu_ecap_sanity = i->ecap; |
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intel_iommu_cap_sanity = i->cap; |
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iommu = i; |
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continue; |
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} |
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if (type == CAP_AUDIT_STATIC_DMAR) |
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check_dmar_capabilities(iommu, i); |
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else |
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check_irq_capabilities(iommu, i); |
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} |
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out: |
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rcu_read_unlock(); |
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return 0; |
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} |
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int intel_cap_audit(enum cap_audit_type type, struct intel_iommu *iommu) |
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{ |
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switch (type) { |
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case CAP_AUDIT_STATIC_DMAR: |
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case CAP_AUDIT_STATIC_IRQR: |
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return cap_audit_static(iommu, type); |
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case CAP_AUDIT_HOTPLUG_DMAR: |
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case CAP_AUDIT_HOTPLUG_IRQR: |
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return cap_audit_hotplug(iommu, type); |
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default: |
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break; |
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} |
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return -EFAULT; |
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} |
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bool intel_cap_smts_sanity(void) |
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{ |
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return ecap_smts(intel_iommu_ecap_sanity); |
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} |
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bool intel_cap_pasid_sanity(void) |
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{ |
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return ecap_pasid(intel_iommu_ecap_sanity); |
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} |
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bool intel_cap_nest_sanity(void) |
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{ |
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return ecap_nest(intel_iommu_ecap_sanity); |
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} |
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bool intel_cap_flts_sanity(void) |
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{ |
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return ecap_flts(intel_iommu_ecap_sanity); |
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}
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