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