702 lines
16 KiB
C
702 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* intel-pasid.c - PASID idr, table and entry manipulation
|
|
*
|
|
* Copyright (C) 2018 Intel Corporation
|
|
*
|
|
* Author: Lu Baolu <baolu.lu@linux.intel.com>
|
|
*/
|
|
|
|
#define pr_fmt(fmt) "DMAR: " fmt
|
|
|
|
#include <linux/bitops.h>
|
|
#include <linux/cpufeature.h>
|
|
#include <linux/dmar.h>
|
|
#include <linux/intel-iommu.h>
|
|
#include <linux/iommu.h>
|
|
#include <linux/memory.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/pci-ats.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
#include "pasid.h"
|
|
|
|
/*
|
|
* Intel IOMMU system wide PASID name space:
|
|
*/
|
|
u32 intel_pasid_max_id = PASID_MAX;
|
|
|
|
int vcmd_alloc_pasid(struct intel_iommu *iommu, u32 *pasid)
|
|
{
|
|
unsigned long flags;
|
|
u8 status_code;
|
|
int ret = 0;
|
|
u64 res;
|
|
|
|
raw_spin_lock_irqsave(&iommu->register_lock, flags);
|
|
dmar_writeq(iommu->reg + DMAR_VCMD_REG, VCMD_CMD_ALLOC);
|
|
IOMMU_WAIT_OP(iommu, DMAR_VCRSP_REG, dmar_readq,
|
|
!(res & VCMD_VRSP_IP), res);
|
|
raw_spin_unlock_irqrestore(&iommu->register_lock, flags);
|
|
|
|
status_code = VCMD_VRSP_SC(res);
|
|
switch (status_code) {
|
|
case VCMD_VRSP_SC_SUCCESS:
|
|
*pasid = VCMD_VRSP_RESULT_PASID(res);
|
|
break;
|
|
case VCMD_VRSP_SC_NO_PASID_AVAIL:
|
|
pr_info("IOMMU: %s: No PASID available\n", iommu->name);
|
|
ret = -ENOSPC;
|
|
break;
|
|
default:
|
|
ret = -ENODEV;
|
|
pr_warn("IOMMU: %s: Unexpected error code %d\n",
|
|
iommu->name, status_code);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
void vcmd_free_pasid(struct intel_iommu *iommu, u32 pasid)
|
|
{
|
|
unsigned long flags;
|
|
u8 status_code;
|
|
u64 res;
|
|
|
|
raw_spin_lock_irqsave(&iommu->register_lock, flags);
|
|
dmar_writeq(iommu->reg + DMAR_VCMD_REG,
|
|
VCMD_CMD_OPERAND(pasid) | VCMD_CMD_FREE);
|
|
IOMMU_WAIT_OP(iommu, DMAR_VCRSP_REG, dmar_readq,
|
|
!(res & VCMD_VRSP_IP), res);
|
|
raw_spin_unlock_irqrestore(&iommu->register_lock, flags);
|
|
|
|
status_code = VCMD_VRSP_SC(res);
|
|
switch (status_code) {
|
|
case VCMD_VRSP_SC_SUCCESS:
|
|
break;
|
|
case VCMD_VRSP_SC_INVALID_PASID:
|
|
pr_info("IOMMU: %s: Invalid PASID\n", iommu->name);
|
|
break;
|
|
default:
|
|
pr_warn("IOMMU: %s: Unexpected error code %d\n",
|
|
iommu->name, status_code);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Per device pasid table management:
|
|
*/
|
|
|
|
/*
|
|
* Allocate a pasid table for @dev. It should be called in a
|
|
* single-thread context.
|
|
*/
|
|
int intel_pasid_alloc_table(struct device *dev)
|
|
{
|
|
struct device_domain_info *info;
|
|
struct pasid_table *pasid_table;
|
|
struct page *pages;
|
|
u32 max_pasid = 0;
|
|
int order, size;
|
|
|
|
might_sleep();
|
|
info = dev_iommu_priv_get(dev);
|
|
if (WARN_ON(!info || !dev_is_pci(dev) || info->pasid_table))
|
|
return -EINVAL;
|
|
|
|
pasid_table = kzalloc(sizeof(*pasid_table), GFP_KERNEL);
|
|
if (!pasid_table)
|
|
return -ENOMEM;
|
|
|
|
if (info->pasid_supported)
|
|
max_pasid = min_t(u32, pci_max_pasids(to_pci_dev(dev)),
|
|
intel_pasid_max_id);
|
|
|
|
size = max_pasid >> (PASID_PDE_SHIFT - 3);
|
|
order = size ? get_order(size) : 0;
|
|
pages = alloc_pages_node(info->iommu->node,
|
|
GFP_KERNEL | __GFP_ZERO, order);
|
|
if (!pages) {
|
|
kfree(pasid_table);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
pasid_table->table = page_address(pages);
|
|
pasid_table->order = order;
|
|
pasid_table->max_pasid = 1 << (order + PAGE_SHIFT + 3);
|
|
info->pasid_table = pasid_table;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void intel_pasid_free_table(struct device *dev)
|
|
{
|
|
struct device_domain_info *info;
|
|
struct pasid_table *pasid_table;
|
|
struct pasid_dir_entry *dir;
|
|
struct pasid_entry *table;
|
|
int i, max_pde;
|
|
|
|
info = dev_iommu_priv_get(dev);
|
|
if (!info || !dev_is_pci(dev) || !info->pasid_table)
|
|
return;
|
|
|
|
pasid_table = info->pasid_table;
|
|
info->pasid_table = NULL;
|
|
|
|
/* Free scalable mode PASID directory tables: */
|
|
dir = pasid_table->table;
|
|
max_pde = pasid_table->max_pasid >> PASID_PDE_SHIFT;
|
|
for (i = 0; i < max_pde; i++) {
|
|
table = get_pasid_table_from_pde(&dir[i]);
|
|
free_pgtable_page(table);
|
|
}
|
|
|
|
free_pages((unsigned long)pasid_table->table, pasid_table->order);
|
|
kfree(pasid_table);
|
|
}
|
|
|
|
struct pasid_table *intel_pasid_get_table(struct device *dev)
|
|
{
|
|
struct device_domain_info *info;
|
|
|
|
info = dev_iommu_priv_get(dev);
|
|
if (!info)
|
|
return NULL;
|
|
|
|
return info->pasid_table;
|
|
}
|
|
|
|
static int intel_pasid_get_dev_max_id(struct device *dev)
|
|
{
|
|
struct device_domain_info *info;
|
|
|
|
info = dev_iommu_priv_get(dev);
|
|
if (!info || !info->pasid_table)
|
|
return 0;
|
|
|
|
return info->pasid_table->max_pasid;
|
|
}
|
|
|
|
static struct pasid_entry *intel_pasid_get_entry(struct device *dev, u32 pasid)
|
|
{
|
|
struct device_domain_info *info;
|
|
struct pasid_table *pasid_table;
|
|
struct pasid_dir_entry *dir;
|
|
struct pasid_entry *entries;
|
|
int dir_index, index;
|
|
|
|
pasid_table = intel_pasid_get_table(dev);
|
|
if (WARN_ON(!pasid_table || pasid >= intel_pasid_get_dev_max_id(dev)))
|
|
return NULL;
|
|
|
|
dir = pasid_table->table;
|
|
info = dev_iommu_priv_get(dev);
|
|
dir_index = pasid >> PASID_PDE_SHIFT;
|
|
index = pasid & PASID_PTE_MASK;
|
|
|
|
retry:
|
|
entries = get_pasid_table_from_pde(&dir[dir_index]);
|
|
if (!entries) {
|
|
entries = alloc_pgtable_page(info->iommu->node);
|
|
if (!entries)
|
|
return NULL;
|
|
|
|
/*
|
|
* The pasid directory table entry won't be freed after
|
|
* allocation. No worry about the race with free and
|
|
* clear. However, this entry might be populated by others
|
|
* while we are preparing it. Use theirs with a retry.
|
|
*/
|
|
if (cmpxchg64(&dir[dir_index].val, 0ULL,
|
|
(u64)virt_to_phys(entries) | PASID_PTE_PRESENT)) {
|
|
free_pgtable_page(entries);
|
|
goto retry;
|
|
}
|
|
}
|
|
|
|
return &entries[index];
|
|
}
|
|
|
|
/*
|
|
* Interfaces for PASID table entry manipulation:
|
|
*/
|
|
static inline void pasid_clear_entry(struct pasid_entry *pe)
|
|
{
|
|
WRITE_ONCE(pe->val[0], 0);
|
|
WRITE_ONCE(pe->val[1], 0);
|
|
WRITE_ONCE(pe->val[2], 0);
|
|
WRITE_ONCE(pe->val[3], 0);
|
|
WRITE_ONCE(pe->val[4], 0);
|
|
WRITE_ONCE(pe->val[5], 0);
|
|
WRITE_ONCE(pe->val[6], 0);
|
|
WRITE_ONCE(pe->val[7], 0);
|
|
}
|
|
|
|
static inline void pasid_clear_entry_with_fpd(struct pasid_entry *pe)
|
|
{
|
|
WRITE_ONCE(pe->val[0], PASID_PTE_FPD);
|
|
WRITE_ONCE(pe->val[1], 0);
|
|
WRITE_ONCE(pe->val[2], 0);
|
|
WRITE_ONCE(pe->val[3], 0);
|
|
WRITE_ONCE(pe->val[4], 0);
|
|
WRITE_ONCE(pe->val[5], 0);
|
|
WRITE_ONCE(pe->val[6], 0);
|
|
WRITE_ONCE(pe->val[7], 0);
|
|
}
|
|
|
|
static void
|
|
intel_pasid_clear_entry(struct device *dev, u32 pasid, bool fault_ignore)
|
|
{
|
|
struct pasid_entry *pe;
|
|
|
|
pe = intel_pasid_get_entry(dev, pasid);
|
|
if (WARN_ON(!pe))
|
|
return;
|
|
|
|
if (fault_ignore && pasid_pte_is_present(pe))
|
|
pasid_clear_entry_with_fpd(pe);
|
|
else
|
|
pasid_clear_entry(pe);
|
|
}
|
|
|
|
static inline void pasid_set_bits(u64 *ptr, u64 mask, u64 bits)
|
|
{
|
|
u64 old;
|
|
|
|
old = READ_ONCE(*ptr);
|
|
WRITE_ONCE(*ptr, (old & ~mask) | bits);
|
|
}
|
|
|
|
/*
|
|
* Setup the DID(Domain Identifier) field (Bit 64~79) of scalable mode
|
|
* PASID entry.
|
|
*/
|
|
static inline void
|
|
pasid_set_domain_id(struct pasid_entry *pe, u64 value)
|
|
{
|
|
pasid_set_bits(&pe->val[1], GENMASK_ULL(15, 0), value);
|
|
}
|
|
|
|
/*
|
|
* Get domain ID value of a scalable mode PASID entry.
|
|
*/
|
|
static inline u16
|
|
pasid_get_domain_id(struct pasid_entry *pe)
|
|
{
|
|
return (u16)(READ_ONCE(pe->val[1]) & GENMASK_ULL(15, 0));
|
|
}
|
|
|
|
/*
|
|
* Setup the SLPTPTR(Second Level Page Table Pointer) field (Bit 12~63)
|
|
* of a scalable mode PASID entry.
|
|
*/
|
|
static inline void
|
|
pasid_set_slptr(struct pasid_entry *pe, u64 value)
|
|
{
|
|
pasid_set_bits(&pe->val[0], VTD_PAGE_MASK, value);
|
|
}
|
|
|
|
/*
|
|
* Setup the AW(Address Width) field (Bit 2~4) of a scalable mode PASID
|
|
* entry.
|
|
*/
|
|
static inline void
|
|
pasid_set_address_width(struct pasid_entry *pe, u64 value)
|
|
{
|
|
pasid_set_bits(&pe->val[0], GENMASK_ULL(4, 2), value << 2);
|
|
}
|
|
|
|
/*
|
|
* Setup the PGTT(PASID Granular Translation Type) field (Bit 6~8)
|
|
* of a scalable mode PASID entry.
|
|
*/
|
|
static inline void
|
|
pasid_set_translation_type(struct pasid_entry *pe, u64 value)
|
|
{
|
|
pasid_set_bits(&pe->val[0], GENMASK_ULL(8, 6), value << 6);
|
|
}
|
|
|
|
/*
|
|
* Enable fault processing by clearing the FPD(Fault Processing
|
|
* Disable) field (Bit 1) of a scalable mode PASID entry.
|
|
*/
|
|
static inline void pasid_set_fault_enable(struct pasid_entry *pe)
|
|
{
|
|
pasid_set_bits(&pe->val[0], 1 << 1, 0);
|
|
}
|
|
|
|
/*
|
|
* Setup the SRE(Supervisor Request Enable) field (Bit 128) of a
|
|
* scalable mode PASID entry.
|
|
*/
|
|
static inline void pasid_set_sre(struct pasid_entry *pe)
|
|
{
|
|
pasid_set_bits(&pe->val[2], 1 << 0, 1);
|
|
}
|
|
|
|
/*
|
|
* Setup the WPE(Write Protect Enable) field (Bit 132) of a
|
|
* scalable mode PASID entry.
|
|
*/
|
|
static inline void pasid_set_wpe(struct pasid_entry *pe)
|
|
{
|
|
pasid_set_bits(&pe->val[2], 1 << 4, 1 << 4);
|
|
}
|
|
|
|
/*
|
|
* Setup the P(Present) field (Bit 0) of a scalable mode PASID
|
|
* entry.
|
|
*/
|
|
static inline void pasid_set_present(struct pasid_entry *pe)
|
|
{
|
|
pasid_set_bits(&pe->val[0], 1 << 0, 1);
|
|
}
|
|
|
|
/*
|
|
* Setup Page Walk Snoop bit (Bit 87) of a scalable mode PASID
|
|
* entry.
|
|
*/
|
|
static inline void pasid_set_page_snoop(struct pasid_entry *pe, bool value)
|
|
{
|
|
pasid_set_bits(&pe->val[1], 1 << 23, value << 23);
|
|
}
|
|
|
|
/*
|
|
* Setup the Page Snoop (PGSNP) field (Bit 88) of a scalable mode
|
|
* PASID entry.
|
|
*/
|
|
static inline void
|
|
pasid_set_pgsnp(struct pasid_entry *pe)
|
|
{
|
|
pasid_set_bits(&pe->val[1], 1ULL << 24, 1ULL << 24);
|
|
}
|
|
|
|
/*
|
|
* Setup the First Level Page table Pointer field (Bit 140~191)
|
|
* of a scalable mode PASID entry.
|
|
*/
|
|
static inline void
|
|
pasid_set_flptr(struct pasid_entry *pe, u64 value)
|
|
{
|
|
pasid_set_bits(&pe->val[2], VTD_PAGE_MASK, value);
|
|
}
|
|
|
|
/*
|
|
* Setup the First Level Paging Mode field (Bit 130~131) of a
|
|
* scalable mode PASID entry.
|
|
*/
|
|
static inline void
|
|
pasid_set_flpm(struct pasid_entry *pe, u64 value)
|
|
{
|
|
pasid_set_bits(&pe->val[2], GENMASK_ULL(3, 2), value << 2);
|
|
}
|
|
|
|
/*
|
|
* Setup the Extended Access Flag Enable (EAFE) field (Bit 135)
|
|
* of a scalable mode PASID entry.
|
|
*/
|
|
static inline void
|
|
pasid_set_eafe(struct pasid_entry *pe)
|
|
{
|
|
pasid_set_bits(&pe->val[2], 1 << 7, 1 << 7);
|
|
}
|
|
|
|
static void
|
|
pasid_cache_invalidation_with_pasid(struct intel_iommu *iommu,
|
|
u16 did, u32 pasid)
|
|
{
|
|
struct qi_desc desc;
|
|
|
|
desc.qw0 = QI_PC_DID(did) | QI_PC_GRAN(QI_PC_PASID_SEL) |
|
|
QI_PC_PASID(pasid) | QI_PC_TYPE;
|
|
desc.qw1 = 0;
|
|
desc.qw2 = 0;
|
|
desc.qw3 = 0;
|
|
|
|
qi_submit_sync(iommu, &desc, 1, 0);
|
|
}
|
|
|
|
static void
|
|
devtlb_invalidation_with_pasid(struct intel_iommu *iommu,
|
|
struct device *dev, u32 pasid)
|
|
{
|
|
struct device_domain_info *info;
|
|
u16 sid, qdep, pfsid;
|
|
|
|
info = dev_iommu_priv_get(dev);
|
|
if (!info || !info->ats_enabled)
|
|
return;
|
|
|
|
sid = info->bus << 8 | info->devfn;
|
|
qdep = info->ats_qdep;
|
|
pfsid = info->pfsid;
|
|
|
|
/*
|
|
* When PASID 0 is used, it indicates RID2PASID(DMA request w/o PASID),
|
|
* devTLB flush w/o PASID should be used. For non-zero PASID under
|
|
* SVA usage, device could do DMA with multiple PASIDs. It is more
|
|
* efficient to flush devTLB specific to the PASID.
|
|
*/
|
|
if (pasid == PASID_RID2PASID)
|
|
qi_flush_dev_iotlb(iommu, sid, pfsid, qdep, 0, 64 - VTD_PAGE_SHIFT);
|
|
else
|
|
qi_flush_dev_iotlb_pasid(iommu, sid, pfsid, pasid, qdep, 0, 64 - VTD_PAGE_SHIFT);
|
|
}
|
|
|
|
void intel_pasid_tear_down_entry(struct intel_iommu *iommu, struct device *dev,
|
|
u32 pasid, bool fault_ignore)
|
|
{
|
|
struct pasid_entry *pte;
|
|
u16 did, pgtt;
|
|
|
|
pte = intel_pasid_get_entry(dev, pasid);
|
|
if (WARN_ON(!pte))
|
|
return;
|
|
|
|
if (!pasid_pte_is_present(pte))
|
|
return;
|
|
|
|
did = pasid_get_domain_id(pte);
|
|
pgtt = pasid_pte_get_pgtt(pte);
|
|
|
|
intel_pasid_clear_entry(dev, pasid, fault_ignore);
|
|
|
|
if (!ecap_coherent(iommu->ecap))
|
|
clflush_cache_range(pte, sizeof(*pte));
|
|
|
|
pasid_cache_invalidation_with_pasid(iommu, did, pasid);
|
|
|
|
if (pgtt == PASID_ENTRY_PGTT_PT || pgtt == PASID_ENTRY_PGTT_FL_ONLY)
|
|
qi_flush_piotlb(iommu, did, pasid, 0, -1, 0);
|
|
else
|
|
iommu->flush.flush_iotlb(iommu, did, 0, 0, DMA_TLB_DSI_FLUSH);
|
|
|
|
/* Device IOTLB doesn't need to be flushed in caching mode. */
|
|
if (!cap_caching_mode(iommu->cap))
|
|
devtlb_invalidation_with_pasid(iommu, dev, pasid);
|
|
}
|
|
|
|
/*
|
|
* This function flushes cache for a newly setup pasid table entry.
|
|
* Caller of it should not modify the in-use pasid table entries.
|
|
*/
|
|
static void pasid_flush_caches(struct intel_iommu *iommu,
|
|
struct pasid_entry *pte,
|
|
u32 pasid, u16 did)
|
|
{
|
|
if (!ecap_coherent(iommu->ecap))
|
|
clflush_cache_range(pte, sizeof(*pte));
|
|
|
|
if (cap_caching_mode(iommu->cap)) {
|
|
pasid_cache_invalidation_with_pasid(iommu, did, pasid);
|
|
qi_flush_piotlb(iommu, did, pasid, 0, -1, 0);
|
|
} else {
|
|
iommu_flush_write_buffer(iommu);
|
|
}
|
|
}
|
|
|
|
static inline int pasid_enable_wpe(struct pasid_entry *pte)
|
|
{
|
|
#ifdef CONFIG_X86
|
|
unsigned long cr0 = read_cr0();
|
|
|
|
/* CR0.WP is normally set but just to be sure */
|
|
if (unlikely(!(cr0 & X86_CR0_WP))) {
|
|
pr_err_ratelimited("No CPU write protect!\n");
|
|
return -EINVAL;
|
|
}
|
|
#endif
|
|
pasid_set_wpe(pte);
|
|
|
|
return 0;
|
|
};
|
|
|
|
/*
|
|
* Set up the scalable mode pasid table entry for first only
|
|
* translation type.
|
|
*/
|
|
int intel_pasid_setup_first_level(struct intel_iommu *iommu,
|
|
struct device *dev, pgd_t *pgd,
|
|
u32 pasid, u16 did, int flags)
|
|
{
|
|
struct pasid_entry *pte;
|
|
|
|
if (!ecap_flts(iommu->ecap)) {
|
|
pr_err("No first level translation support on %s\n",
|
|
iommu->name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
pte = intel_pasid_get_entry(dev, pasid);
|
|
if (WARN_ON(!pte))
|
|
return -EINVAL;
|
|
|
|
/* Caller must ensure PASID entry is not in use. */
|
|
if (pasid_pte_is_present(pte))
|
|
return -EBUSY;
|
|
|
|
pasid_clear_entry(pte);
|
|
|
|
/* Setup the first level page table pointer: */
|
|
pasid_set_flptr(pte, (u64)__pa(pgd));
|
|
if (flags & PASID_FLAG_SUPERVISOR_MODE) {
|
|
if (!ecap_srs(iommu->ecap)) {
|
|
pr_err("No supervisor request support on %s\n",
|
|
iommu->name);
|
|
return -EINVAL;
|
|
}
|
|
pasid_set_sre(pte);
|
|
if (pasid_enable_wpe(pte))
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
if (flags & PASID_FLAG_FL5LP) {
|
|
if (cap_5lp_support(iommu->cap)) {
|
|
pasid_set_flpm(pte, 1);
|
|
} else {
|
|
pr_err("No 5-level paging support for first-level\n");
|
|
pasid_clear_entry(pte);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
if (flags & PASID_FLAG_PAGE_SNOOP)
|
|
pasid_set_pgsnp(pte);
|
|
|
|
pasid_set_domain_id(pte, did);
|
|
pasid_set_address_width(pte, iommu->agaw);
|
|
pasid_set_page_snoop(pte, !!ecap_smpwc(iommu->ecap));
|
|
|
|
/* Setup Present and PASID Granular Transfer Type: */
|
|
pasid_set_translation_type(pte, PASID_ENTRY_PGTT_FL_ONLY);
|
|
pasid_set_present(pte);
|
|
pasid_flush_caches(iommu, pte, pasid, did);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Skip top levels of page tables for iommu which has less agaw
|
|
* than default. Unnecessary for PT mode.
|
|
*/
|
|
static inline int iommu_skip_agaw(struct dmar_domain *domain,
|
|
struct intel_iommu *iommu,
|
|
struct dma_pte **pgd)
|
|
{
|
|
int agaw;
|
|
|
|
for (agaw = domain->agaw; agaw > iommu->agaw; agaw--) {
|
|
*pgd = phys_to_virt(dma_pte_addr(*pgd));
|
|
if (!dma_pte_present(*pgd))
|
|
return -EINVAL;
|
|
}
|
|
|
|
return agaw;
|
|
}
|
|
|
|
/*
|
|
* Set up the scalable mode pasid entry for second only translation type.
|
|
*/
|
|
int intel_pasid_setup_second_level(struct intel_iommu *iommu,
|
|
struct dmar_domain *domain,
|
|
struct device *dev, u32 pasid)
|
|
{
|
|
struct pasid_entry *pte;
|
|
struct dma_pte *pgd;
|
|
u64 pgd_val;
|
|
int agaw;
|
|
u16 did;
|
|
|
|
/*
|
|
* If hardware advertises no support for second level
|
|
* translation, return directly.
|
|
*/
|
|
if (!ecap_slts(iommu->ecap)) {
|
|
pr_err("No second level translation support on %s\n",
|
|
iommu->name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
pgd = domain->pgd;
|
|
agaw = iommu_skip_agaw(domain, iommu, &pgd);
|
|
if (agaw < 0) {
|
|
dev_err(dev, "Invalid domain page table\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
pgd_val = virt_to_phys(pgd);
|
|
did = domain->iommu_did[iommu->seq_id];
|
|
|
|
pte = intel_pasid_get_entry(dev, pasid);
|
|
if (!pte) {
|
|
dev_err(dev, "Failed to get pasid entry of PASID %d\n", pasid);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Caller must ensure PASID entry is not in use. */
|
|
if (pasid_pte_is_present(pte))
|
|
return -EBUSY;
|
|
|
|
pasid_clear_entry(pte);
|
|
pasid_set_domain_id(pte, did);
|
|
pasid_set_slptr(pte, pgd_val);
|
|
pasid_set_address_width(pte, agaw);
|
|
pasid_set_translation_type(pte, PASID_ENTRY_PGTT_SL_ONLY);
|
|
pasid_set_fault_enable(pte);
|
|
pasid_set_page_snoop(pte, !!ecap_smpwc(iommu->ecap));
|
|
|
|
if (domain->domain.type == IOMMU_DOMAIN_UNMANAGED)
|
|
pasid_set_pgsnp(pte);
|
|
|
|
/*
|
|
* Since it is a second level only translation setup, we should
|
|
* set SRE bit as well (addresses are expected to be GPAs).
|
|
*/
|
|
if (pasid != PASID_RID2PASID)
|
|
pasid_set_sre(pte);
|
|
pasid_set_present(pte);
|
|
pasid_flush_caches(iommu, pte, pasid, did);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Set up the scalable mode pasid entry for passthrough translation type.
|
|
*/
|
|
int intel_pasid_setup_pass_through(struct intel_iommu *iommu,
|
|
struct dmar_domain *domain,
|
|
struct device *dev, u32 pasid)
|
|
{
|
|
u16 did = FLPT_DEFAULT_DID;
|
|
struct pasid_entry *pte;
|
|
|
|
pte = intel_pasid_get_entry(dev, pasid);
|
|
if (!pte) {
|
|
dev_err(dev, "Failed to get pasid entry of PASID %d\n", pasid);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Caller must ensure PASID entry is not in use. */
|
|
if (pasid_pte_is_present(pte))
|
|
return -EBUSY;
|
|
|
|
pasid_clear_entry(pte);
|
|
pasid_set_domain_id(pte, did);
|
|
pasid_set_address_width(pte, iommu->agaw);
|
|
pasid_set_translation_type(pte, PASID_ENTRY_PGTT_PT);
|
|
pasid_set_fault_enable(pte);
|
|
pasid_set_page_snoop(pte, !!ecap_smpwc(iommu->ecap));
|
|
|
|
/*
|
|
* We should set SRE bit as well since the addresses are expected
|
|
* to be GPAs.
|
|
*/
|
|
pasid_set_sre(pte);
|
|
pasid_set_present(pte);
|
|
pasid_flush_caches(iommu, pte, pasid, did);
|
|
|
|
return 0;
|
|
}
|