1ad3d1902SKyung Min Park // SPDX-License-Identifier: GPL-2.0
2ad3d1902SKyung Min Park /*
3ad3d1902SKyung Min Park * cap_audit.c - audit iommu capabilities for boot time and hot plug
4ad3d1902SKyung Min Park *
5ad3d1902SKyung Min Park * Copyright (C) 2021 Intel Corporation
6ad3d1902SKyung Min Park *
7ad3d1902SKyung Min Park * Author: Kyung Min Park <kyung.min.park@intel.com>
8ad3d1902SKyung Min Park * Lu Baolu <baolu.lu@linux.intel.com>
9ad3d1902SKyung Min Park */
10ad3d1902SKyung Min Park
11ad3d1902SKyung Min Park #define pr_fmt(fmt) "DMAR: " fmt
12ad3d1902SKyung Min Park
132585a279SLu Baolu #include "iommu.h"
14ad3d1902SKyung Min Park #include "cap_audit.h"
15ad3d1902SKyung Min Park
16ad3d1902SKyung Min Park static u64 intel_iommu_cap_sanity;
17ad3d1902SKyung Min Park static u64 intel_iommu_ecap_sanity;
18ad3d1902SKyung Min Park
check_irq_capabilities(struct intel_iommu * a,struct intel_iommu * b)19ad3d1902SKyung Min Park static inline void check_irq_capabilities(struct intel_iommu *a,
20ad3d1902SKyung Min Park struct intel_iommu *b)
21ad3d1902SKyung Min Park {
22ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, cap, pi_support, CAP_PI_MASK);
23ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, eim_support, ECAP_EIM_MASK);
24ad3d1902SKyung Min Park }
25ad3d1902SKyung Min Park
check_dmar_capabilities(struct intel_iommu * a,struct intel_iommu * b)26ad3d1902SKyung Min Park static inline void check_dmar_capabilities(struct intel_iommu *a,
27ad3d1902SKyung Min Park struct intel_iommu *b)
28ad3d1902SKyung Min Park {
29ad3d1902SKyung Min Park MINIMAL_FEATURE_IOMMU(b, cap, CAP_MAMV_MASK);
30ad3d1902SKyung Min Park MINIMAL_FEATURE_IOMMU(b, cap, CAP_NFR_MASK);
31ad3d1902SKyung Min Park MINIMAL_FEATURE_IOMMU(b, cap, CAP_SLLPS_MASK);
32ad3d1902SKyung Min Park MINIMAL_FEATURE_IOMMU(b, cap, CAP_FRO_MASK);
33ad3d1902SKyung Min Park MINIMAL_FEATURE_IOMMU(b, cap, CAP_MGAW_MASK);
34ad3d1902SKyung Min Park MINIMAL_FEATURE_IOMMU(b, cap, CAP_SAGAW_MASK);
35ad3d1902SKyung Min Park MINIMAL_FEATURE_IOMMU(b, cap, CAP_NDOMS_MASK);
36ad3d1902SKyung Min Park MINIMAL_FEATURE_IOMMU(b, ecap, ECAP_PSS_MASK);
37ad3d1902SKyung Min Park MINIMAL_FEATURE_IOMMU(b, ecap, ECAP_MHMV_MASK);
38ad3d1902SKyung Min Park MINIMAL_FEATURE_IOMMU(b, ecap, ECAP_IRO_MASK);
39ad3d1902SKyung Min Park
40*b722cb32SYi Liu CHECK_FEATURE_MISMATCH(a, b, cap, fl5lp_support, CAP_FL5LP_MASK);
41ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, cap, fl1gp_support, CAP_FL1GP_MASK);
42ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, cap, read_drain, CAP_RD_MASK);
43ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, cap, write_drain, CAP_WD_MASK);
44ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, cap, pgsel_inv, CAP_PSI_MASK);
45ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, cap, zlr, CAP_ZLR_MASK);
46ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, cap, caching_mode, CAP_CM_MASK);
47ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, cap, phmr, CAP_PHMR_MASK);
48ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, cap, plmr, CAP_PLMR_MASK);
49ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, cap, rwbf, CAP_RWBF_MASK);
50ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, cap, afl, CAP_AFL_MASK);
51ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, rps, ECAP_RPS_MASK);
52ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, smpwc, ECAP_SMPWC_MASK);
53ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, flts, ECAP_FLTS_MASK);
54ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, slts, ECAP_SLTS_MASK);
55ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, nwfs, ECAP_NWFS_MASK);
56ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, slads, ECAP_SLADS_MASK);
57ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, smts, ECAP_SMTS_MASK);
58ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, pds, ECAP_PDS_MASK);
59ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, dit, ECAP_DIT_MASK);
60ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, pasid, ECAP_PASID_MASK);
61ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, eafs, ECAP_EAFS_MASK);
62ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, srs, ECAP_SRS_MASK);
63ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, ers, ECAP_ERS_MASK);
64ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, prs, ECAP_PRS_MASK);
65ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, nest, ECAP_NEST_MASK);
66ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, mts, ECAP_MTS_MASK);
67ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, sc_support, ECAP_SC_MASK);
68ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, pass_through, ECAP_PT_MASK);
69ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, dev_iotlb_support, ECAP_DT_MASK);
70ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, qis, ECAP_QI_MASK);
71ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH(a, b, ecap, coherent, ECAP_C_MASK);
72ad3d1902SKyung Min Park }
73ad3d1902SKyung Min Park
cap_audit_hotplug(struct intel_iommu * iommu,enum cap_audit_type type)74ad3d1902SKyung Min Park static int cap_audit_hotplug(struct intel_iommu *iommu, enum cap_audit_type type)
75ad3d1902SKyung Min Park {
76ad3d1902SKyung Min Park bool mismatch = false;
77ad3d1902SKyung Min Park u64 old_cap = intel_iommu_cap_sanity;
78ad3d1902SKyung Min Park u64 old_ecap = intel_iommu_ecap_sanity;
79ad3d1902SKyung Min Park
80ad3d1902SKyung Min Park if (type == CAP_AUDIT_HOTPLUG_IRQR) {
81ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, pi_support, CAP_PI_MASK);
82ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, eim_support, ECAP_EIM_MASK);
83ad3d1902SKyung Min Park goto out;
84ad3d1902SKyung Min Park }
85ad3d1902SKyung Min Park
86*b722cb32SYi Liu CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, fl5lp_support, CAP_FL5LP_MASK);
87ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, fl1gp_support, CAP_FL1GP_MASK);
88ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, read_drain, CAP_RD_MASK);
89ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, write_drain, CAP_WD_MASK);
90ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, pgsel_inv, CAP_PSI_MASK);
91ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, zlr, CAP_ZLR_MASK);
92ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, caching_mode, CAP_CM_MASK);
93ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, phmr, CAP_PHMR_MASK);
94ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, plmr, CAP_PLMR_MASK);
95ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, rwbf, CAP_RWBF_MASK);
96ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, cap, afl, CAP_AFL_MASK);
97ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, rps, ECAP_RPS_MASK);
98ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, smpwc, ECAP_SMPWC_MASK);
99ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, flts, ECAP_FLTS_MASK);
100ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, slts, ECAP_SLTS_MASK);
101ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, nwfs, ECAP_NWFS_MASK);
102ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, slads, ECAP_SLADS_MASK);
103ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, smts, ECAP_SMTS_MASK);
104ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, pds, ECAP_PDS_MASK);
105ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, dit, ECAP_DIT_MASK);
106ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, pasid, ECAP_PASID_MASK);
107ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, eafs, ECAP_EAFS_MASK);
108ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, srs, ECAP_SRS_MASK);
109ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, ers, ECAP_ERS_MASK);
110ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, prs, ECAP_PRS_MASK);
111ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, nest, ECAP_NEST_MASK);
112ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, mts, ECAP_MTS_MASK);
113ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, sc_support, ECAP_SC_MASK);
114ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, pass_through, ECAP_PT_MASK);
115ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, dev_iotlb_support, ECAP_DT_MASK);
116ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, qis, ECAP_QI_MASK);
117ad3d1902SKyung Min Park CHECK_FEATURE_MISMATCH_HOTPLUG(iommu, ecap, coherent, ECAP_C_MASK);
118ad3d1902SKyung Min Park
119ad3d1902SKyung Min Park /* Abort hot plug if the hot plug iommu feature is smaller than global */
120ad3d1902SKyung Min Park MINIMAL_FEATURE_HOTPLUG(iommu, cap, max_amask_val, CAP_MAMV_MASK, mismatch);
121ad3d1902SKyung Min Park MINIMAL_FEATURE_HOTPLUG(iommu, cap, num_fault_regs, CAP_NFR_MASK, mismatch);
122ad3d1902SKyung Min Park MINIMAL_FEATURE_HOTPLUG(iommu, cap, super_page_val, CAP_SLLPS_MASK, mismatch);
123ad3d1902SKyung Min Park MINIMAL_FEATURE_HOTPLUG(iommu, cap, fault_reg_offset, CAP_FRO_MASK, mismatch);
124ad3d1902SKyung Min Park MINIMAL_FEATURE_HOTPLUG(iommu, cap, mgaw, CAP_MGAW_MASK, mismatch);
125ad3d1902SKyung Min Park MINIMAL_FEATURE_HOTPLUG(iommu, cap, sagaw, CAP_SAGAW_MASK, mismatch);
126ad3d1902SKyung Min Park MINIMAL_FEATURE_HOTPLUG(iommu, cap, ndoms, CAP_NDOMS_MASK, mismatch);
127ad3d1902SKyung Min Park MINIMAL_FEATURE_HOTPLUG(iommu, ecap, pss, ECAP_PSS_MASK, mismatch);
128ad3d1902SKyung Min Park MINIMAL_FEATURE_HOTPLUG(iommu, ecap, max_handle_mask, ECAP_MHMV_MASK, mismatch);
129ad3d1902SKyung Min Park MINIMAL_FEATURE_HOTPLUG(iommu, ecap, iotlb_offset, ECAP_IRO_MASK, mismatch);
130ad3d1902SKyung Min Park
131ad3d1902SKyung Min Park out:
132ad3d1902SKyung Min Park if (mismatch) {
133ad3d1902SKyung Min Park intel_iommu_cap_sanity = old_cap;
134ad3d1902SKyung Min Park intel_iommu_ecap_sanity = old_ecap;
135ad3d1902SKyung Min Park return -EFAULT;
136ad3d1902SKyung Min Park }
137ad3d1902SKyung Min Park
138ad3d1902SKyung Min Park return 0;
139ad3d1902SKyung Min Park }
140ad3d1902SKyung Min Park
cap_audit_static(struct intel_iommu * iommu,enum cap_audit_type type)141ad3d1902SKyung Min Park static int cap_audit_static(struct intel_iommu *iommu, enum cap_audit_type type)
142ad3d1902SKyung Min Park {
143ad3d1902SKyung Min Park struct dmar_drhd_unit *d;
144ad3d1902SKyung Min Park struct intel_iommu *i;
1454e5973ddSChristophe JAILLET int rc = 0;
146ad3d1902SKyung Min Park
147ad3d1902SKyung Min Park rcu_read_lock();
148ad3d1902SKyung Min Park if (list_empty(&dmar_drhd_units))
149ad3d1902SKyung Min Park goto out;
150ad3d1902SKyung Min Park
151ad3d1902SKyung Min Park for_each_active_iommu(i, d) {
152ad3d1902SKyung Min Park if (!iommu) {
153ad3d1902SKyung Min Park intel_iommu_ecap_sanity = i->ecap;
154ad3d1902SKyung Min Park intel_iommu_cap_sanity = i->cap;
155ad3d1902SKyung Min Park iommu = i;
156ad3d1902SKyung Min Park continue;
157ad3d1902SKyung Min Park }
158ad3d1902SKyung Min Park
159ad3d1902SKyung Min Park if (type == CAP_AUDIT_STATIC_DMAR)
160ad3d1902SKyung Min Park check_dmar_capabilities(iommu, i);
161ad3d1902SKyung Min Park else
162ad3d1902SKyung Min Park check_irq_capabilities(iommu, i);
163ad3d1902SKyung Min Park }
164ad3d1902SKyung Min Park
1657afd7f6aSLu Baolu /*
1667afd7f6aSLu Baolu * If the system is sane to support scalable mode, either SL or FL
1677afd7f6aSLu Baolu * should be sane.
1687afd7f6aSLu Baolu */
1697afd7f6aSLu Baolu if (intel_cap_smts_sanity() &&
1707afd7f6aSLu Baolu !intel_cap_flts_sanity() && !intel_cap_slts_sanity())
1714e5973ddSChristophe JAILLET rc = -EOPNOTSUPP;
1727afd7f6aSLu Baolu
173ad3d1902SKyung Min Park out:
174ad3d1902SKyung Min Park rcu_read_unlock();
1754e5973ddSChristophe JAILLET return rc;
176ad3d1902SKyung Min Park }
177ad3d1902SKyung Min Park
intel_cap_audit(enum cap_audit_type type,struct intel_iommu * iommu)178ad3d1902SKyung Min Park int intel_cap_audit(enum cap_audit_type type, struct intel_iommu *iommu)
179ad3d1902SKyung Min Park {
180ad3d1902SKyung Min Park switch (type) {
181ad3d1902SKyung Min Park case CAP_AUDIT_STATIC_DMAR:
182ad3d1902SKyung Min Park case CAP_AUDIT_STATIC_IRQR:
183ad3d1902SKyung Min Park return cap_audit_static(iommu, type);
184ad3d1902SKyung Min Park case CAP_AUDIT_HOTPLUG_DMAR:
185ad3d1902SKyung Min Park case CAP_AUDIT_HOTPLUG_IRQR:
186ad3d1902SKyung Min Park return cap_audit_hotplug(iommu, type);
187ad3d1902SKyung Min Park default:
188ad3d1902SKyung Min Park break;
189ad3d1902SKyung Min Park }
190ad3d1902SKyung Min Park
191ad3d1902SKyung Min Park return -EFAULT;
192ad3d1902SKyung Min Park }
193010bf565SKyung Min Park
intel_cap_smts_sanity(void)194010bf565SKyung Min Park bool intel_cap_smts_sanity(void)
195010bf565SKyung Min Park {
196010bf565SKyung Min Park return ecap_smts(intel_iommu_ecap_sanity);
197010bf565SKyung Min Park }
198010bf565SKyung Min Park
intel_cap_pasid_sanity(void)199010bf565SKyung Min Park bool intel_cap_pasid_sanity(void)
200010bf565SKyung Min Park {
201010bf565SKyung Min Park return ecap_pasid(intel_iommu_ecap_sanity);
202010bf565SKyung Min Park }
203010bf565SKyung Min Park
intel_cap_nest_sanity(void)204010bf565SKyung Min Park bool intel_cap_nest_sanity(void)
205010bf565SKyung Min Park {
206010bf565SKyung Min Park return ecap_nest(intel_iommu_ecap_sanity);
207010bf565SKyung Min Park }
208010bf565SKyung Min Park
intel_cap_flts_sanity(void)209010bf565SKyung Min Park bool intel_cap_flts_sanity(void)
210010bf565SKyung Min Park {
211010bf565SKyung Min Park return ecap_flts(intel_iommu_ecap_sanity);
212010bf565SKyung Min Park }
2137afd7f6aSLu Baolu
intel_cap_slts_sanity(void)2147afd7f6aSLu Baolu bool intel_cap_slts_sanity(void)
2157afd7f6aSLu Baolu {
2167afd7f6aSLu Baolu return ecap_slts(intel_iommu_ecap_sanity);
2177afd7f6aSLu Baolu }
218