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Merge branch 'memory-observability' into x86/amd

Browse Source
This commit is contained in:
Joerg Roedel 2024-04-26 12:54:13 +02:00
commit 5dc72c8a14
24 changed files with 360 additions and 202 deletions
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2
Documentation/admin-guide/cgroup-v2.rst
View File

@ -1432,7 +1432,7 @@ PAGE_SIZE multiple when read back.
sec_pagetables
Amount of memory allocated for secondary page tables,
this currently includes KVM mmu allocations on x86
and arm64.
and arm64 and IOMMU page tables.
percpu (npn)
Amount of memory used for storing per-cpu kernel

4
Documentation/filesystems/proc.rst
View File

@ -1110,8 +1110,8 @@ KernelStack
PageTables
Memory consumed by userspace page tables
SecPageTables
Memory consumed by secondary page tables, this currently
currently includes KVM mmu allocations on x86 and arm64.
Memory consumed by secondary page tables, this currently includes
KVM mmu and IOMMU allocations on x86 and arm64.
NFS_Unstable
Always zero. Previous counted pages which had been written to
the server, but has not been committed to stable storage.

8
drivers/iommu/amd/amd_iommu.h
View File

@ -162,14 +162,6 @@ static inline int get_pci_sbdf_id(struct pci_dev *pdev)
return PCI_SEG_DEVID_TO_SBDF(seg, devid);
}
static inline void *alloc_pgtable_page(int nid, gfp_t gfp)
{
struct page *page;
page = alloc_pages_node(nid, gfp | __GFP_ZERO, 0);
return page ? page_address(page) : NULL;
}
/*
* This must be called after device probe completes. During probe
* use rlookup_amd_iommu() get the iommu.

86
drivers/iommu/amd/init.c
View File

@ -36,6 +36,7 @@
#include "amd_iommu.h"
#include "../irq_remapping.h"
#include "../iommu-pages.h"
/*
* definitions for the ACPI scanning code
@ -649,8 +650,8 @@ static int __init find_last_devid_acpi(struct acpi_table_header *table, u16 pci_
/* Allocate per PCI segment device table */
static inline int __init alloc_dev_table(struct amd_iommu_pci_seg *pci_seg)
{
pci_seg->dev_table = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO | GFP_DMA32,
get_order(pci_seg->dev_table_size));
pci_seg->dev_table = iommu_alloc_pages(GFP_KERNEL | GFP_DMA32,
get_order(pci_seg->dev_table_size));
if (!pci_seg->dev_table)
return -ENOMEM;
@ -659,17 +660,16 @@ static inline int __init alloc_dev_table(struct amd_iommu_pci_seg *pci_seg)
static inline void free_dev_table(struct amd_iommu_pci_seg *pci_seg)
{
free_pages((unsigned long)pci_seg->dev_table,
get_order(pci_seg->dev_table_size));
iommu_free_pages(pci_seg->dev_table,
get_order(pci_seg->dev_table_size));
pci_seg->dev_table = NULL;
}
/* Allocate per PCI segment IOMMU rlookup table. */
static inline int __init alloc_rlookup_table(struct amd_iommu_pci_seg *pci_seg)
{
pci_seg->rlookup_table = (void *)__get_free_pages(
GFP_KERNEL | __GFP_ZERO,
get_order(pci_seg->rlookup_table_size));
pci_seg->rlookup_table = iommu_alloc_pages(GFP_KERNEL,
get_order(pci_seg->rlookup_table_size));
if (pci_seg->rlookup_table == NULL)
return -ENOMEM;
@ -678,16 +678,15 @@ static inline int __init alloc_rlookup_table(struct amd_iommu_pci_seg *pci_seg)
static inline void free_rlookup_table(struct amd_iommu_pci_seg *pci_seg)
{
free_pages((unsigned long)pci_seg->rlookup_table,
get_order(pci_seg->rlookup_table_size));
iommu_free_pages(pci_seg->rlookup_table,
get_order(pci_seg->rlookup_table_size));
pci_seg->rlookup_table = NULL;
}
static inline int __init alloc_irq_lookup_table(struct amd_iommu_pci_seg *pci_seg)
{
pci_seg->irq_lookup_table = (void *)__get_free_pages(
GFP_KERNEL | __GFP_ZERO,
get_order(pci_seg->rlookup_table_size));
pci_seg->irq_lookup_table = iommu_alloc_pages(GFP_KERNEL,
get_order(pci_seg->rlookup_table_size));
kmemleak_alloc(pci_seg->irq_lookup_table,
pci_seg->rlookup_table_size, 1, GFP_KERNEL);
if (pci_seg->irq_lookup_table == NULL)
@ -699,8 +698,8 @@ static inline int __init alloc_irq_lookup_table(struct amd_iommu_pci_seg *pci_se
static inline void free_irq_lookup_table(struct amd_iommu_pci_seg *pci_seg)
{
kmemleak_free(pci_seg->irq_lookup_table);
free_pages((unsigned long)pci_seg->irq_lookup_table,
get_order(pci_seg->rlookup_table_size));
iommu_free_pages(pci_seg->irq_lookup_table,
get_order(pci_seg->rlookup_table_size));
pci_seg->irq_lookup_table = NULL;
}
@ -708,8 +707,8 @@ static int __init alloc_alias_table(struct amd_iommu_pci_seg *pci_seg)
{
int i;
pci_seg->alias_table = (void *)__get_free_pages(GFP_KERNEL,
get_order(pci_seg->alias_table_size));
pci_seg->alias_table = iommu_alloc_pages(GFP_KERNEL,
get_order(pci_seg->alias_table_size));
if (!pci_seg->alias_table)
return -ENOMEM;
@ -724,8 +723,8 @@ static int __init alloc_alias_table(struct amd_iommu_pci_seg *pci_seg)
static void __init free_alias_table(struct amd_iommu_pci_seg *pci_seg)
{
free_pages((unsigned long)pci_seg->alias_table,
get_order(pci_seg->alias_table_size));
iommu_free_pages(pci_seg->alias_table,
get_order(pci_seg->alias_table_size));
pci_seg->alias_table = NULL;
}
@ -736,8 +735,8 @@ static void __init free_alias_table(struct amd_iommu_pci_seg *pci_seg)
*/
static int __init alloc_command_buffer(struct amd_iommu *iommu)
{
iommu->cmd_buf = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
get_order(CMD_BUFFER_SIZE));
iommu->cmd_buf = iommu_alloc_pages(GFP_KERNEL,
get_order(CMD_BUFFER_SIZE));
return iommu->cmd_buf ? 0 : -ENOMEM;
}
@ -834,19 +833,19 @@ static void iommu_disable_command_buffer(struct amd_iommu *iommu)
static void __init free_command_buffer(struct amd_iommu *iommu)
{
free_pages((unsigned long)iommu->cmd_buf, get_order(CMD_BUFFER_SIZE));
iommu_free_pages(iommu->cmd_buf, get_order(CMD_BUFFER_SIZE));
}
void *__init iommu_alloc_4k_pages(struct amd_iommu *iommu, gfp_t gfp,
size_t size)
{
int order = get_order(size);
void *buf = (void *)__get_free_pages(gfp, order);
void *buf = iommu_alloc_pages(gfp, order);
if (buf &&
check_feature(FEATURE_SNP) &&
set_memory_4k((unsigned long)buf, (1 << order))) {
free_pages((unsigned long)buf, order);
iommu_free_pages(buf, order);
buf = NULL;
}
@ -856,7 +855,7 @@ void *__init iommu_alloc_4k_pages(struct amd_iommu *iommu, gfp_t gfp,
/* allocates the memory where the IOMMU will log its events to */
static int __init alloc_event_buffer(struct amd_iommu *iommu)
{
iommu->evt_buf = iommu_alloc_4k_pages(iommu, GFP_KERNEL | __GFP_ZERO,
iommu->evt_buf = iommu_alloc_4k_pages(iommu, GFP_KERNEL,
EVT_BUFFER_SIZE);
return iommu->evt_buf ? 0 : -ENOMEM;
@ -890,14 +889,14 @@ static void iommu_disable_event_buffer(struct amd_iommu *iommu)
static void __init free_event_buffer(struct amd_iommu *iommu)
{
free_pages((unsigned long)iommu->evt_buf, get_order(EVT_BUFFER_SIZE));
iommu_free_pages(iommu->evt_buf, get_order(EVT_BUFFER_SIZE));
}
static void free_ga_log(struct amd_iommu *iommu)
{
#ifdef CONFIG_IRQ_REMAP
free_pages((unsigned long)iommu->ga_log, get_order(GA_LOG_SIZE));
free_pages((unsigned long)iommu->ga_log_tail, get_order(8));
iommu_free_pages(iommu->ga_log, get_order(GA_LOG_SIZE));
iommu_free_pages(iommu->ga_log_tail, get_order(8));
#endif
}
@ -942,13 +941,11 @@ static int iommu_init_ga_log(struct amd_iommu *iommu)
if (!AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir))
return 0;
iommu->ga_log = (u8 *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
get_order(GA_LOG_SIZE));
iommu->ga_log = iommu_alloc_pages(GFP_KERNEL, get_order(GA_LOG_SIZE));
if (!iommu->ga_log)
goto err_out;
iommu->ga_log_tail = (u8 *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
get_order(8));
iommu->ga_log_tail = iommu_alloc_pages(GFP_KERNEL, get_order(8));
if (!iommu->ga_log_tail)
goto err_out;
@ -961,7 +958,7 @@ err_out:
static int __init alloc_cwwb_sem(struct amd_iommu *iommu)
{
iommu->cmd_sem = iommu_alloc_4k_pages(iommu, GFP_KERNEL | __GFP_ZERO, 1);
iommu->cmd_sem = iommu_alloc_4k_pages(iommu, GFP_KERNEL, 1);
return iommu->cmd_sem ? 0 : -ENOMEM;
}
@ -969,7 +966,7 @@ static int __init alloc_cwwb_sem(struct amd_iommu *iommu)
static void __init free_cwwb_sem(struct amd_iommu *iommu)
{
if (iommu->cmd_sem)
free_page((unsigned long)iommu->cmd_sem);
iommu_free_page((void *)iommu->cmd_sem);
}
static void iommu_enable_xt(struct amd_iommu *iommu)
@ -1034,7 +1031,6 @@ static bool __copy_device_table(struct amd_iommu *iommu)
u32 lo, hi, devid, old_devtb_size;
phys_addr_t old_devtb_phys;
u16 dom_id, dte_v, irq_v;
gfp_t gfp_flag;
u64 tmp;
/* Each IOMMU use separate device table with the same size */
@ -1068,9 +1064,8 @@ static bool __copy_device_table(struct amd_iommu *iommu)
if (!old_devtb)
return false;
gfp_flag = GFP_KERNEL | __GFP_ZERO | GFP_DMA32;
pci_seg->old_dev_tbl_cpy = (void *)__get_free_pages(gfp_flag,
get_order(pci_seg->dev_table_size));
pci_seg->old_dev_tbl_cpy = iommu_alloc_pages(GFP_KERNEL | GFP_DMA32,
get_order(pci_seg->dev_table_size));
if (pci_seg->old_dev_tbl_cpy == NULL) {
pr_err("Failed to allocate memory for copying old device table!\n");
memunmap(old_devtb);
@ -2769,8 +2764,8 @@ static void early_enable_iommus(void)
for_each_pci_segment(pci_seg) {
if (pci_seg->old_dev_tbl_cpy != NULL) {
free_pages((unsigned long)pci_seg->old_dev_tbl_cpy,
get_order(pci_seg->dev_table_size));
iommu_free_pages(pci_seg->old_dev_tbl_cpy,
get_order(pci_seg->dev_table_size));
pci_seg->old_dev_tbl_cpy = NULL;
}
}
@ -2783,8 +2778,8 @@ static void early_enable_iommus(void)
pr_info("Copied DEV table from previous kernel.\n");
for_each_pci_segment(pci_seg) {
free_pages((unsigned long)pci_seg->dev_table,
get_order(pci_seg->dev_table_size));
iommu_free_pages(pci_seg->dev_table,
get_order(pci_seg->dev_table_size));
pci_seg->dev_table = pci_seg->old_dev_tbl_cpy;
}
@ -2989,8 +2984,8 @@ static bool __init check_ioapic_information(void)
static void __init free_dma_resources(void)
{
free_pages((unsigned long)amd_iommu_pd_alloc_bitmap,
get_order(MAX_DOMAIN_ID/8));
iommu_free_pages(amd_iommu_pd_alloc_bitmap,
get_order(MAX_DOMAIN_ID / 8));
amd_iommu_pd_alloc_bitmap = NULL;
free_unity_maps();
@ -3062,9 +3057,8 @@ static int __init early_amd_iommu_init(void)
/* Device table - directly used by all IOMMUs */
ret = -ENOMEM;
amd_iommu_pd_alloc_bitmap = (void *)__get_free_pages(
GFP_KERNEL | __GFP_ZERO,
get_order(MAX_DOMAIN_ID/8));
amd_iommu_pd_alloc_bitmap = iommu_alloc_pages(GFP_KERNEL,
get_order(MAX_DOMAIN_ID / 8));
if (amd_iommu_pd_alloc_bitmap == NULL)
goto out;

13
drivers/iommu/amd/io_pgtable.c
View File

@ -22,6 +22,7 @@
#include "amd_iommu_types.h"
#include "amd_iommu.h"
#include "../iommu-pages.h"
static void v1_tlb_flush_all(void *cookie)
{
@ -156,7 +157,7 @@ static bool increase_address_space(struct protection_domain *domain,
bool ret = true;
u64 *pte;
pte = alloc_pgtable_page(domain->nid, gfp);
pte = iommu_alloc_page_node(domain->nid, gfp);
if (!pte)
return false;
@ -187,7 +188,7 @@ static bool increase_address_space(struct protection_domain *domain,
out:
spin_unlock_irqrestore(&domain->lock, flags);
free_page((unsigned long)pte);
iommu_free_page(pte);
return ret;
}
@ -250,7 +251,7 @@ static u64 *alloc_pte(struct protection_domain *domain,
if (!IOMMU_PTE_PRESENT(__pte) ||
pte_level == PAGE_MODE_NONE) {
page = alloc_pgtable_page(domain->nid, gfp);
page = iommu_alloc_page_node(domain->nid, gfp);
if (!page)
return NULL;
@ -259,7 +260,7 @@ static u64 *alloc_pte(struct protection_domain *domain,
/* pte could have been changed somewhere. */
if (!try_cmpxchg64(pte, &__pte, __npte))
free_page((unsigned long)page);
iommu_free_page(page);
else if (IOMMU_PTE_PRESENT(__pte))
*updated = true;
@ -431,7 +432,7 @@ out:
}
/* Everything flushed out, free pages now */
put_pages_list(&freelist);
iommu_put_pages_list(&freelist);
return ret;
}
@ -580,7 +581,7 @@ static void v1_free_pgtable(struct io_pgtable *iop)
/* Make changes visible to IOMMUs */
amd_iommu_domain_update(dom);
put_pages_list(&freelist);
iommu_put_pages_list(&freelist);
}
static struct io_pgtable *v1_alloc_pgtable(struct io_pgtable_cfg *cfg, void *cookie)

18
drivers/iommu/amd/io_pgtable_v2.c
View File

@ -18,6 +18,7 @@
#include "amd_iommu_types.h"
#include "amd_iommu.h"
#include "../iommu-pages.h"
#define IOMMU_PAGE_PRESENT BIT_ULL(0) /* Is present */
#define IOMMU_PAGE_RW BIT_ULL(1) /* Writeable */
@ -99,11 +100,6 @@ static inline int page_size_to_level(u64 pg_size)
return PAGE_MODE_1_LEVEL;
}
static inline void free_pgtable_page(u64 *pt)
{
free_page((unsigned long)pt);
}
static void free_pgtable(u64 *pt, int level)
{
u64 *p;
@ -125,10 +121,10 @@ static void free_pgtable(u64 *pt, int level)
if (level > 2)
free_pgtable(p, level - 1);
else
free_pgtable_page(p);
iommu_free_page(p);
}
free_pgtable_page(pt);
iommu_free_page(pt);
}
/* Allocate page table */
@ -156,14 +152,14 @@ static u64 *v2_alloc_pte(int nid, u64 *pgd, unsigned long iova,
}
if (!IOMMU_PTE_PRESENT(__pte)) {
page = alloc_pgtable_page(nid, gfp);
page = iommu_alloc_page_node(nid, gfp);
if (!page)
return NULL;
__npte = set_pgtable_attr(page);
/* pte could have been changed somewhere. */
if (cmpxchg64(pte, __pte, __npte) != __pte)
free_pgtable_page(page);
iommu_free_page(page);
else if (IOMMU_PTE_PRESENT(__pte))
*updated = true;
@ -185,7 +181,7 @@ static u64 *v2_alloc_pte(int nid, u64 *pgd, unsigned long iova,
if (pg_size == IOMMU_PAGE_SIZE_1G)
free_pgtable(__pte, end_level - 1);
else if (pg_size == IOMMU_PAGE_SIZE_2M)
free_pgtable_page(__pte);
iommu_free_page(__pte);
}
return pte;
@ -366,7 +362,7 @@ static struct io_pgtable *v2_alloc_pgtable(struct io_pgtable_cfg *cfg, void *coo
struct protection_domain *pdom = (struct protection_domain *)cookie;
int ias = IOMMU_IN_ADDR_BIT_SIZE;
pgtable->pgd = alloc_pgtable_page(pdom->nid, GFP_ATOMIC);
pgtable->pgd = iommu_alloc_page_node(pdom->nid, GFP_ATOMIC);
if (!pgtable->pgd)
return NULL;

11
drivers/iommu/amd/iommu.c
View File

@ -42,6 +42,7 @@
#include "amd_iommu.h"
#include "../dma-iommu.h"
#include "../irq_remapping.h"
#include "../iommu-pages.h"
#define CMD_SET_TYPE(cmd, t) ((cmd)->data[1] |= ((t) << 28))
@ -1686,7 +1687,7 @@ static void free_gcr3_tbl_level1(u64 *tbl)
ptr = iommu_phys_to_virt(tbl[i] & PAGE_MASK);
free_page((unsigned long)ptr);
iommu_free_page(ptr);
}
}
@ -1719,7 +1720,7 @@ static void free_gcr3_table(struct gcr3_tbl_info *gcr3_info)
/* Free per device domain ID */
domain_id_free(gcr3_info->domid);
free_page((unsigned long)gcr3_info->gcr3_tbl);
iommu_free_page(gcr3_info->gcr3_tbl);
gcr3_info->gcr3_tbl = NULL;
}
@ -1754,7 +1755,7 @@ static int setup_gcr3_table(struct gcr3_tbl_info *gcr3_info,
/* Allocate per device domain ID */
gcr3_info->domid = domain_id_alloc();
gcr3_info->gcr3_tbl = alloc_pgtable_page(nid, GFP_ATOMIC);
gcr3_info->gcr3_tbl = iommu_alloc_page_node(nid, GFP_ATOMIC);
if (gcr3_info->gcr3_tbl == NULL) {
domain_id_free(gcr3_info->domid);
return -ENOMEM;
@ -2289,7 +2290,7 @@ void protection_domain_free(struct protection_domain *domain)
free_io_pgtable_ops(&domain->iop.iop.ops);
if (domain->iop.root)
free_page((unsigned long)domain->iop.root);
iommu_free_page(domain->iop.root);
if (domain->id)
domain_id_free(domain->id);
@ -2304,7 +2305,7 @@ static int protection_domain_init_v1(struct protection_domain *domain, int mode)
BUG_ON(mode < PAGE_MODE_NONE || mode > PAGE_MODE_6_LEVEL);
if (mode != PAGE_MODE_NONE) {
pt_root = (void *)get_zeroed_page(GFP_KERNEL);
pt_root = iommu_alloc_page(GFP_KERNEL);
if (!pt_root)
return -ENOMEM;
}

4
drivers/iommu/amd/ppr.c
View File

@ -15,6 +15,8 @@
#include "amd_iommu.h"
#include "amd_iommu_types.h"
#include "../iommu-pages.h"
int __init amd_iommu_alloc_ppr_log(struct amd_iommu *iommu)
{
iommu->ppr_log = iommu_alloc_4k_pages(iommu, GFP_KERNEL | __GFP_ZERO,
@ -46,7 +48,7 @@ void amd_iommu_enable_ppr_log(struct amd_iommu *iommu)
void __init amd_iommu_free_ppr_log(struct amd_iommu *iommu)
{
free_pages((unsigned long)iommu->ppr_log, get_order(PPR_LOG_SIZE));
iommu_free_pages(iommu->ppr_log, get_order(PPR_LOG_SIZE));
}
/*

7
drivers/iommu/dma-iommu.c
View File

@ -32,6 +32,7 @@
#include <trace/events/swiotlb.h>
#include "dma-iommu.h"
#include "iommu-pages.h"
struct iommu_dma_msi_page {
struct list_head list;
@ -156,7 +157,7 @@ static void fq_ring_free_locked(struct iommu_dma_cookie *cookie, struct iova_fq
if (fq->entries[idx].counter >= counter)
break;
put_pages_list(&fq->entries[idx].freelist);
iommu_put_pages_list(&fq->entries[idx].freelist);
free_iova_fast(&cookie->iovad,
fq->entries[idx].iova_pfn,
fq->entries[idx].pages);
@ -254,7 +255,7 @@ static void iommu_dma_free_fq_single(struct iova_fq *fq)
int idx;
fq_ring_for_each(idx, fq)
put_pages_list(&fq->entries[idx].freelist);
iommu_put_pages_list(&fq->entries[idx].freelist);
vfree(fq);
}
@ -267,7 +268,7 @@ static void iommu_dma_free_fq_percpu(struct iova_fq __percpu *percpu_fq)
struct iova_fq *fq = per_cpu_ptr(percpu_fq, cpu);
fq_ring_for_each(idx, fq)
put_pages_list(&fq->entries[idx].freelist);
iommu_put_pages_list(&fq->entries[idx].freelist);
}
free_percpu(percpu_fq);

14
drivers/iommu/exynos-iommu.c
View File

@ -22,6 +22,8 @@
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include "iommu-pages.h"
typedef u32 sysmmu_iova_t;
typedef u32 sysmmu_pte_t;
static struct iommu_domain exynos_identity_domain;
@ -900,11 +902,11 @@ static struct iommu_domain *exynos_iommu_domain_alloc_paging(struct device *dev)
if (!domain)
return NULL;
domain->pgtable = (sysmmu_pte_t *)__get_free_pages(GFP_KERNEL, 2);
domain->pgtable = iommu_alloc_pages(GFP_KERNEL, 2);
if (!domain->pgtable)
goto err_pgtable;
domain->lv2entcnt = (short *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 1);
domain->lv2entcnt = iommu_alloc_pages(GFP_KERNEL, 1);
if (!domain->lv2entcnt)
goto err_counter;
@ -930,9 +932,9 @@ static struct iommu_domain *exynos_iommu_domain_alloc_paging(struct device *dev)
return &domain->domain;
err_lv2ent:
free_pages((unsigned long)domain->lv2entcnt, 1);
iommu_free_pages(domain->lv2entcnt, 1);
err_counter:
free_pages((unsigned long)domain->pgtable, 2);
iommu_free_pages(domain->pgtable, 2);
err_pgtable:
kfree(domain);
return NULL;
@ -973,8 +975,8 @@ static void exynos_iommu_domain_free(struct iommu_domain *iommu_domain)
phys_to_virt(base));
}
free_pages((unsigned long)domain->pgtable, 2);
free_pages((unsigned long)domain->lv2entcnt, 1);
iommu_free_pages(domain->pgtable, 2);
iommu_free_pages(domain->lv2entcnt, 1);
kfree(domain);
}

16
drivers/iommu/intel/dmar.c
View File

@ -32,6 +32,7 @@
#include "iommu.h"
#include "../irq_remapping.h"
#include "../iommu-pages.h"
#include "perf.h"
#include "trace.h"
#include "perfmon.h"
@ -1187,7 +1188,7 @@ static void free_iommu(struct intel_iommu *iommu)
}
if (iommu->qi) {
free_page((unsigned long)iommu->qi->desc);
iommu_free_page(iommu->qi->desc);
kfree(iommu->qi->desc_status);
kfree(iommu->qi);
}
@ -1755,7 +1756,8 @@ static void __dmar_enable_qi(struct intel_iommu *iommu)
int dmar_enable_qi(struct intel_iommu *iommu)
{
struct q_inval *qi;
struct page *desc_page;
void *desc;
int order;
if (!ecap_qis(iommu->ecap))
return -ENOENT;
@ -1776,19 +1778,19 @@ int dmar_enable_qi(struct intel_iommu *iommu)
* Need two pages to accommodate 256 descriptors of 256 bits each
* if the remapping hardware supports scalable mode translation.
*/
desc_page = alloc_pages_node(iommu->node, GFP_ATOMIC | __GFP_ZERO,
!!ecap_smts(iommu->ecap));
if (!desc_page) {
order = ecap_smts(iommu->ecap) ? 1 : 0;
desc = iommu_alloc_pages_node(iommu->node, GFP_ATOMIC, order);
if (!desc) {
kfree(qi);
iommu->qi = NULL;
return -ENOMEM;
}
qi->desc = page_address(desc_page);
qi->desc = desc;
qi->desc_status = kcalloc(QI_LENGTH, sizeof(int), GFP_ATOMIC);
if (!qi->desc_status) {
free_page((unsigned long) qi->desc);
iommu_free_page(qi->desc);
kfree(qi);
iommu->qi = NULL;
return -ENOMEM;

47
drivers/iommu/intel/iommu.c
View File

@ -27,6 +27,7 @@
#include "iommu.h"
#include "../dma-iommu.h"
#include "../irq_remapping.h"
#include "../iommu-pages.h"
#include "pasid.h"
#include "cap_audit.h"
#include "perfmon.h"
@ -298,22 +299,6 @@ static int __init intel_iommu_setup(char *str)
}
__setup("intel_iommu=", intel_iommu_setup);
void *alloc_pgtable_page(int node, gfp_t gfp)
{
struct page *page;
void *vaddr = NULL;
page = alloc_pages_node(node, gfp | __GFP_ZERO, 0);
if (page)
vaddr = page_address(page);
return vaddr;
}
void free_pgtable_page(void *vaddr)
{
free_page((unsigned long)vaddr);
}
static int domain_type_is_si(struct dmar_domain *domain)
{
return domain->domain.type == IOMMU_DOMAIN_IDENTITY;
@ -545,7 +530,7 @@ struct context_entry *iommu_context_addr(struct intel_iommu *iommu, u8 bus,
if (!alloc)
return NULL;
context = alloc_pgtable_page(iommu->node, GFP_ATOMIC);
context = iommu_alloc_page_node(iommu->node, GFP_ATOMIC);
if (!context)
return NULL;
@ -719,17 +704,17 @@ static void free_context_table(struct intel_iommu *iommu)
for (i = 0; i < ROOT_ENTRY_NR; i++) {
context = iommu_context_addr(iommu, i, 0, 0);
if (context)
free_pgtable_page(context);
iommu_free_page(context);
if (!sm_supported(iommu))
continue;
context = iommu_context_addr(iommu, i, 0x80, 0);
if (context)
free_pgtable_page(context);
iommu_free_page(context);
}
free_pgtable_page(iommu->root_entry);
iommu_free_page(iommu->root_entry);
iommu->root_entry = NULL;
}
@ -867,7 +852,7 @@ static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain,
if (!dma_pte_present(pte)) {
uint64_t pteval;
tmp_page = alloc_pgtable_page(domain->nid, gfp);
tmp_page = iommu_alloc_page_node(domain->nid, gfp);
if (!tmp_page)
return NULL;
@ -879,7 +864,7 @@ static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain,
if (cmpxchg64(&pte->val, 0ULL, pteval))
/* Someone else set it while we were thinking; use theirs. */
free_pgtable_page(tmp_page);
iommu_free_page(tmp_page);
else
domain_flush_cache(domain, pte, sizeof(*pte));
}
@ -992,7 +977,7 @@ static void dma_pte_free_level(struct dmar_domain *domain, int level,
last_pfn < level_pfn + level_size(level) - 1)) {
dma_clear_pte(pte);
domain_flush_cache(domain, pte, sizeof(*pte));
free_pgtable_page(level_pte);
iommu_free_page(level_pte);
}
next:
pfn += level_size(level);
@ -1016,7 +1001,7 @@ static void dma_pte_free_pagetable(struct dmar_domain *domain,
/* free pgd */
if (start_pfn == 0 && last_pfn == DOMAIN_MAX_PFN(domain->gaw)) {
free_pgtable_page(domain->pgd);
iommu_free_page(domain->pgd);
domain->pgd = NULL;
}
}
@ -1118,7 +1103,7 @@ static int iommu_alloc_root_entry(struct intel_iommu *iommu)
{
struct root_entry *root;
root = alloc_pgtable_page(iommu->node, GFP_ATOMIC);
root = iommu_alloc_page_node(iommu->node, GFP_ATOMIC);
if (!root) {
pr_err("Allocating root entry for %s failed\n",
iommu->name);
@ -1841,7 +1826,7 @@ static void domain_exit(struct dmar_domain *domain)
LIST_HEAD(freelist);
domain_unmap(domain, 0, DOMAIN_MAX_PFN(domain->gaw), &freelist);
put_pages_list(&freelist);
iommu_put_pages_list(&freelist);
}
if (WARN_ON(!list_empty(&domain->devices)))
@ -2497,7 +2482,7 @@ static int copy_context_table(struct intel_iommu *iommu,
if (!old_ce)
goto out;
new_ce = alloc_pgtable_page(iommu->node, GFP_KERNEL);
new_ce = iommu_alloc_page_node(iommu->node, GFP_KERNEL);
if (!new_ce)
goto out_unmap;
@ -3426,7 +3411,7 @@ static int intel_iommu_memory_notifier(struct notifier_block *nb,
start_vpfn, mhp->nr_pages,
list_empty(&freelist), 0);
rcu_read_unlock();
put_pages_list(&freelist);
iommu_put_pages_list(&freelist);
}
break;
}
@ -3833,7 +3818,7 @@ static int md_domain_init(struct dmar_domain *domain, int guest_width)
domain->max_addr = 0;
/* always allocate the top pgd */
domain->pgd = alloc_pgtable_page(domain->nid, GFP_ATOMIC);
domain->pgd = iommu_alloc_page_node(domain->nid, GFP_ATOMIC);
if (!domain->pgd)
return -ENOMEM;
domain_flush_cache(domain, domain->pgd, PAGE_SIZE);
@ -3987,7 +3972,7 @@ int prepare_domain_attach_device(struct iommu_domain *domain,
pte = dmar_domain->pgd;
if (dma_pte_present(pte)) {
dmar_domain->pgd = phys_to_virt(dma_pte_addr(pte));
free_pgtable_page(pte);
iommu_free_page(pte);
}
dmar_domain->agaw--;
}
@ -4141,7 +4126,7 @@ static void intel_iommu_tlb_sync(struct iommu_domain *domain,
if (dmar_domain->nested_parent)
parent_domain_flush(dmar_domain, start_pfn, nrpages,
list_empty(&gather->freelist));
put_pages_list(&gather->freelist);
iommu_put_pages_list(&gather->freelist);
}
static phys_addr_t intel_iommu_iova_to_phys(struct iommu_domain *domain,

2
drivers/iommu/intel/iommu.h
View File

@ -1085,8 +1085,6 @@ void domain_update_iommu_cap(struct dmar_domain *domain);
int dmar_ir_support(void);
void *alloc_pgtable_page(int node, gfp_t gfp);
void free_pgtable_page(void *vaddr);
void iommu_flush_write_buffer(struct intel_iommu *iommu);
struct iommu_domain *intel_nested_domain_alloc(struct iommu_domain *parent,
const struct iommu_user_data *user_data);

16
drivers/iommu/intel/irq_remapping.c
View File

@ -22,6 +22,7 @@
#include "iommu.h"
#include "../irq_remapping.h"
#include "../iommu-pages.h"
#include "cap_audit.h"
enum irq_mode {
@ -527,7 +528,7 @@ static int intel_setup_irq_remapping(struct intel_iommu *iommu)
struct ir_table *ir_table;
struct fwnode_handle *fn;
unsigned long *bitmap;
struct page *pages;
void *ir_table_base;
if (iommu->ir_table)
return 0;
@ -536,9 +537,9 @@ static int intel_setup_irq_remapping(struct intel_iommu *iommu)
if (!ir_table)
return -ENOMEM;
pages = alloc_pages_node(iommu->node, GFP_KERNEL | __GFP_ZERO,
INTR_REMAP_PAGE_ORDER);
if (!pages) {
ir_table_base = iommu_alloc_pages_node(iommu->node, GFP_KERNEL,
INTR_REMAP_PAGE_ORDER);
if (!ir_table_base) {
pr_err("IR%d: failed to allocate pages of order %d\n",
iommu->seq_id, INTR_REMAP_PAGE_ORDER);
goto out_free_table;
@ -573,7 +574,7 @@ static int intel_setup_irq_remapping(struct intel_iommu *iommu)
else
iommu->ir_domain->msi_parent_ops = &dmar_msi_parent_ops;
ir_table->base = page_address(pages);
ir_table->base = ir_table_base;
ir_table->bitmap = bitmap;
iommu->ir_table = ir_table;
@ -622,7 +623,7 @@ out_free_fwnode:
out_free_bitmap:
bitmap_free(bitmap);
out_free_pages:
__free_pages(pages, INTR_REMAP_PAGE_ORDER);
iommu_free_pages(ir_table_base, INTR_REMAP_PAGE_ORDER);
out_free_table:
kfree(ir_table);
@ -643,8 +644,7 @@ static void intel_teardown_irq_remapping(struct intel_iommu *iommu)
irq_domain_free_fwnode(fn);
iommu->ir_domain = NULL;
}
free_pages((unsigned long)iommu->ir_table->base,
INTR_REMAP_PAGE_ORDER);
iommu_free_pages(iommu->ir_table->base, INTR_REMAP_PAGE_ORDER);
bitmap_free(iommu->ir_table->bitmap);
kfree(iommu->ir_table);
iommu->ir_table = NULL;

18
drivers/iommu/intel/pasid.c
View File

@ -20,6 +20,7 @@
#include "iommu.h"
#include "pasid.h"
#include "../iommu-pages.h"
/*
* Intel IOMMU system wide PASID name space:
@ -38,7 +39,7 @@ int intel_pasid_alloc_table(struct device *dev)
{
struct device_domain_info *info;
struct pasid_table *pasid_table;
struct page *pages;
struct pasid_dir_entry *dir;
u32 max_pasid = 0;
int order, size;
@ -59,14 +60,13 @@ int intel_pasid_alloc_table(struct device *dev)
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) {
dir = iommu_alloc_pages_node(info->iommu->node, GFP_KERNEL, order);
if (!dir) {
kfree(pasid_table);
return -ENOMEM;
}
pasid_table->table = page_address(pages);
pasid_table->table = dir;
pasid_table->order = order;
pasid_table->max_pasid = 1 << (order + PAGE_SHIFT + 3);
info->pasid_table = pasid_table;
@ -97,10 +97,10 @@ void intel_pasid_free_table(struct device *dev)
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);
iommu_free_page(table);
}
free_pages((unsigned long)pasid_table->table, pasid_table->order);
iommu_free_pages(pasid_table->table, pasid_table->order);
kfree(pasid_table);
}
@ -146,7 +146,7 @@ static struct pasid_entry *intel_pasid_get_entry(struct device *dev, u32 pasid)
retry:
entries = get_pasid_table_from_pde(&dir[dir_index]);
if (!entries) {
entries = alloc_pgtable_page(info->iommu->node, GFP_ATOMIC);
entries = iommu_alloc_page_node(info->iommu->node, GFP_ATOMIC);
if (!entries)
return NULL;
@ -158,7 +158,7 @@ retry:
*/
if (cmpxchg64(&dir[dir_index].val, 0ULL,
(u64)virt_to_phys(entries) | PASID_PTE_PRESENT)) {
free_pgtable_page(entries);
iommu_free_page(entries);
goto retry;
}
if (!ecap_coherent(info->iommu->ecap)) {

11
drivers/iommu/intel/svm.c
View File

@ -22,6 +22,7 @@
#include "iommu.h"
#include "pasid.h"
#include "perf.h"
#include "../iommu-pages.h"
#include "trace.h"
static irqreturn_t prq_event_thread(int irq, void *d);
@ -63,16 +64,14 @@ svm_lookup_device_by_dev(struct intel_svm *svm, struct device *dev)
int intel_svm_enable_prq(struct intel_iommu *iommu)
{
struct iopf_queue *iopfq;
struct page *pages;
int irq, ret;
pages = alloc_pages_node(iommu->node, GFP_KERNEL | __GFP_ZERO, PRQ_ORDER);
if (!pages) {
iommu->prq = iommu_alloc_pages_node(iommu->node, GFP_KERNEL, PRQ_ORDER);
if (!iommu->prq) {
pr_warn("IOMMU: %s: Failed to allocate page request queue\n",
iommu->name);
return -ENOMEM;
}
iommu->prq = page_address(pages);
irq = dmar_alloc_hwirq(IOMMU_IRQ_ID_OFFSET_PRQ + iommu->seq_id, iommu->node, iommu);
if (irq <= 0) {
@ -117,7 +116,7 @@ free_hwirq:
dmar_free_hwirq(irq);
iommu->pr_irq = 0;
free_prq:
free_pages((unsigned long)iommu->prq, PRQ_ORDER);
iommu_free_pages(iommu->prq, PRQ_ORDER);
iommu->prq = NULL;
return ret;
@ -140,7 +139,7 @@ int intel_svm_finish_prq(struct intel_iommu *iommu)
iommu->iopf_queue = NULL;
}
free_pages((unsigned long)iommu->prq, PRQ_ORDER);
iommu_free_pages(iommu->prq, PRQ_ORDER);
iommu->prq = NULL;
return 0;

15
drivers/iommu/io-pgtable-arm.c
View File

@ -21,6 +21,7 @@
#include <asm/barrier.h>
#include "io-pgtable-arm.h"
#include "iommu-pages.h"
#define ARM_LPAE_MAX_ADDR_BITS 52
#define ARM_LPAE_S2_MAX_CONCAT_PAGES 16
@ -198,14 +199,10 @@ static void *__arm_lpae_alloc_pages(size_t size, gfp_t gfp,
VM_BUG_ON((gfp & __GFP_HIGHMEM));
if (cfg->alloc) {
if (cfg->alloc)
pages = cfg->alloc(cookie, size, gfp);
} else {
struct page *p;
p = alloc_pages_node(dev_to_node(dev), gfp | __GFP_ZERO, order);
pages = p ? page_address(p) : NULL;
}
else
pages = iommu_alloc_pages_node(dev_to_node(dev), gfp, order);
if (!pages)
return NULL;
@ -233,7 +230,7 @@ out_free:
if (cfg->free)
cfg->free(cookie, pages, size);
else
free_pages((unsigned long)pages, order);
iommu_free_pages(pages, order);
return NULL;
}
@ -249,7 +246,7 @@ static void __arm_lpae_free_pages(void *pages, size_t size,
if (cfg->free)
cfg->free(cookie, pages, size);
else
free_pages((unsigned long)pages, get_order(size));
iommu_free_pages(pages, get_order(size));
}
static void __arm_lpae_sync_pte(arm_lpae_iopte *ptep, int num_entries,

37
drivers/iommu/io-pgtable-dart.c
View File

@ -23,6 +23,7 @@
#include <linux/types.h>
#include <asm/barrier.h>
#include "iommu-pages.h"
#define DART1_MAX_ADDR_BITS 36
@ -106,18 +107,12 @@ static phys_addr_t iopte_to_paddr(dart_iopte pte,
return paddr;
}
static void *__dart_alloc_pages(size_t size, gfp_t gfp,
struct io_pgtable_cfg *cfg)
static void *__dart_alloc_pages(size_t size, gfp_t gfp)
{
int order = get_order(size);
struct page *p;
VM_BUG_ON((gfp & __GFP_HIGHMEM));
p = alloc_pages(gfp | __GFP_ZERO, order);
if (!p)
return NULL;
return page_address(p);
return iommu_alloc_pages(gfp, order);
}
static int dart_init_pte(struct dart_io_pgtable *data,
@ -262,13 +257,13 @@ static int dart_map_pages(struct io_pgtable_ops *ops, unsigned long iova,
/* no L2 table present */
if (!pte) {
cptep = __dart_alloc_pages(tblsz, gfp, cfg);
cptep = __dart_alloc_pages(tblsz, gfp);
if (!cptep)
return -ENOMEM;
pte = dart_install_table(cptep, ptep, 0, data);
if (pte)
free_pages((unsigned long)cptep, get_order(tblsz));
iommu_free_pages(cptep, get_order(tblsz));
/* L2 table is present (now) */
pte = READ_ONCE(*ptep);
@ -419,8 +414,7 @@ apple_dart_alloc_pgtable(struct io_pgtable_cfg *cfg, void *cookie)
cfg->apple_dart_cfg.n_ttbrs = 1 << data->tbl_bits;
for (i = 0; i < cfg->apple_dart_cfg.n_ttbrs; ++i) {
data->pgd[i] = __dart_alloc_pages(DART_GRANULE(data), GFP_KERNEL,
cfg);
data->pgd[i] = __dart_alloc_pages(DART_GRANULE(data), GFP_KERNEL);
if (!data->pgd[i])
goto out_free_data;
cfg->apple_dart_cfg.ttbr[i] = virt_to_phys(data->pgd[i]);
@ -429,9 +423,10 @@ apple_dart_alloc_pgtable(struct io_pgtable_cfg *cfg, void *cookie)
return &data->iop;
out_free_data:
while (--i >= 0)
free_pages((unsigned long)data->pgd[i],
get_order(DART_GRANULE(data)));
while (--i >= 0) {
iommu_free_pages(data->pgd[i],
get_order(DART_GRANULE(data)));
}
kfree(data);
return NULL;
}
@ -439,6 +434,7 @@ out_free_data:
static void apple_dart_free_pgtable(struct io_pgtable *iop)
{
struct dart_io_pgtable *data = io_pgtable_to_data(iop);
int order = get_order(DART_GRANULE(data));
dart_iopte *ptep, *end;
int i;
@ -449,15 +445,10 @@ static void apple_dart_free_pgtable(struct io_pgtable *iop)
while (ptep != end) {
dart_iopte pte = *ptep++;
if (pte) {
unsigned long page =
(unsigned long)iopte_deref(pte, data);
free_pages(page, get_order(DART_GRANULE(data)));
}
if (pte)
iommu_free_pages(iopte_deref(pte, data), order);
}
free_pages((unsigned long)data->pgd[i],
get_order(DART_GRANULE(data)));
iommu_free_pages(data->pgd[i], order);
}
kfree(data);

186
drivers/iommu/iommu-pages.h Normal file
View File

@ -0,0 +1,186 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2024, Google LLC.
* Pasha Tatashin <pasha.tatashin@soleen.com>
*/
#ifndef __IOMMU_PAGES_H
#define __IOMMU_PAGES_H
#include <linux/vmstat.h>
#include <linux/gfp.h>
#include <linux/mm.h>
/*
* All page allocations that should be reported to as "iommu-pagetables" to
* userspace must use one of the functions below. This includes allocations of
* page-tables and other per-iommu_domain configuration structures.
*
* This is necessary for the proper accounting as IOMMU state can be rather
* large, i.e. multiple gigabytes in size.
*/
/**
* __iommu_alloc_account - account for newly allocated page.
* @page: head struct page of the page.
* @order: order of the page
*/
static inline void __iommu_alloc_account(struct page *page, int order)
{
const long pgcnt = 1l << order;
mod_node_page_state(page_pgdat(page), NR_IOMMU_PAGES, pgcnt);
mod_lruvec_page_state(page, NR_SECONDARY_PAGETABLE, pgcnt);
}
/**
* __iommu_free_account - account a page that is about to be freed.
* @page: head struct page of the page.
* @order: order of the page
*/
static inline void __iommu_free_account(struct page *page, int order)
{
const long pgcnt = 1l << order;
mod_node_page_state(page_pgdat(page), NR_IOMMU_PAGES, -pgcnt);
mod_lruvec_page_state(page, NR_SECONDARY_PAGETABLE, -pgcnt);
}
/**
* __iommu_alloc_pages - allocate a zeroed page of a given order.
* @gfp: buddy allocator flags
* @order: page order
*
* returns the head struct page of the allocated page.
*/
static inline struct page *__iommu_alloc_pages(gfp_t gfp, int order)
{
struct page *page;
page = alloc_pages(gfp | __GFP_ZERO, order);
if (unlikely(!page))
return NULL;
__iommu_alloc_account(page, order);
return page;
}
/**
* __iommu_free_pages - free page of a given order
* @page: head struct page of the page
* @order: page order
*/
static inline void __iommu_free_pages(struct page *page, int order)
{
if (!page)
return;
__iommu_free_account(page, order);
__free_pages(page, order);
}
/**
* iommu_alloc_pages_node - allocate a zeroed page of a given order from
* specific NUMA node.
* @nid: memory NUMA node id
* @gfp: buddy allocator flags
* @order: page order
*
* returns the virtual address of the allocated page
*/
static inline void *iommu_alloc_pages_node(int nid, gfp_t gfp, int order)
{
struct page *page = alloc_pages_node(nid, gfp | __GFP_ZERO, order);
if (unlikely(!page))
return NULL;
__iommu_alloc_account(page, order);
return page_address(page);
}
/**
* iommu_alloc_pages - allocate a zeroed page of a given order
* @gfp: buddy allocator flags
* @order: page order
*
* returns the virtual address of the allocated page
*/
static inline void *iommu_alloc_pages(gfp_t gfp, int order)
{
struct page *page = __iommu_alloc_pages(gfp, order);
if (unlikely(!page))
return NULL;
return page_address(page);
}
/**
* iommu_alloc_page_node - allocate a zeroed page at specific NUMA node.
* @nid: memory NUMA node id
* @gfp: buddy allocator flags
*
* returns the virtual address of the allocated page
*/
static inline void *iommu_alloc_page_node(int nid, gfp_t gfp)
{
return iommu_alloc_pages_node(nid, gfp, 0);
}
/**
* iommu_alloc_page - allocate a zeroed page
* @gfp: buddy allocator flags
*
* returns the virtual address of the allocated page
*/
static inline void *iommu_alloc_page(gfp_t gfp)
{
return iommu_alloc_pages(gfp, 0);
}
/**
* iommu_free_pages - free page of a given order
* @virt: virtual address of the page to be freed.
* @order: page order
*/
static inline void iommu_free_pages(void *virt, int order)
{
if (!virt)
return;
__iommu_free_pages(virt_to_page(virt), order);
}
/**
* iommu_free_page - free page
* @virt: virtual address of the page to be freed.
*/
static inline void iommu_free_page(void *virt)
{
iommu_free_pages(virt, 0);
}
/**
* iommu_put_pages_list - free a list of pages.
* @page: the head of the lru list to be freed.
*
* There are no locking requirement for these pages, as they are going to be
* put on a free list as soon as refcount reaches 0. Pages are put on this LRU
* list once they are removed from the IOMMU page tables. However, they can
* still be access through debugfs.
*/
static inline void iommu_put_pages_list(struct list_head *page)
{
while (!list_empty(page)) {
struct page *p = list_entry(page->prev, struct page, lru);
list_del(&p->lru);
__iommu_free_account(p, 0);
put_page(p);
}
}
#endif /* __IOMMU_PAGES_H */

14
drivers/iommu/rockchip-iommu.c
View File

@ -26,6 +26,8 @@
#include <linux/slab.h>
#include <linux/spinlock.h>
#include "iommu-pages.h"
/** MMU register offsets */
#define RK_MMU_DTE_ADDR 0x00 /* Directory table address */
#define RK_MMU_STATUS 0x04
@ -727,14 +729,14 @@ static u32 *rk_dte_get_page_table(struct rk_iommu_domain *rk_domain,
if (rk_dte_is_pt_valid(dte))
goto done;
page_table = (u32 *)get_zeroed_page(GFP_ATOMIC | rk_ops->gfp_flags);
page_table = iommu_alloc_page(GFP_ATOMIC | rk_ops->gfp_flags);
if (!page_table)
return ERR_PTR(-ENOMEM);
pt_dma = dma_map_single(dma_dev, page_table, SPAGE_SIZE, DMA_TO_DEVICE);
if (dma_mapping_error(dma_dev, pt_dma)) {
dev_err(dma_dev, "DMA mapping error while allocating page table\n");
free_page((unsigned long)page_table);
iommu_free_page(page_table);
return ERR_PTR(-ENOMEM);
}
@ -1061,7 +1063,7 @@ static struct iommu_domain *rk_iommu_domain_alloc_paging(struct device *dev)
* Each level1 (dt) and level2 (pt) table has 1024 4-byte entries.
* Allocate one 4 KiB page for each table.
*/
rk_domain->dt = (u32 *)get_zeroed_page(GFP_KERNEL | rk_ops->gfp_flags);
rk_domain->dt = iommu_alloc_page(GFP_KERNEL | rk_ops->gfp_flags);
if (!rk_domain->dt)
goto err_free_domain;
@ -1083,7 +1085,7 @@ static struct iommu_domain *rk_iommu_domain_alloc_paging(struct device *dev)
return &rk_domain->domain;
err_free_dt:
free_page((unsigned long)rk_domain->dt);
iommu_free_page(rk_domain->dt);
err_free_domain:
kfree(rk_domain);
@ -1104,13 +1106,13 @@ static void rk_iommu_domain_free(struct iommu_domain *domain)
u32 *page_table = phys_to_virt(pt_phys);
dma_unmap_single(dma_dev, pt_phys,
SPAGE_SIZE, DMA_TO_DEVICE);
free_page((unsigned long)page_table);
iommu_free_page(page_table);
}
}
dma_unmap_single(dma_dev, rk_domain->dt_dma,
SPAGE_SIZE, DMA_TO_DEVICE);
free_page((unsigned long)rk_domain->dt);
iommu_free_page(rk_domain->dt);
kfree(rk_domain);
}

7
drivers/iommu/sun50i-iommu.c
View File

@ -26,6 +26,8 @@
#include <linux/spinlock.h>
#include <linux/types.h>
#include "iommu-pages.h"
#define IOMMU_RESET_REG 0x010
#define IOMMU_RESET_RELEASE_ALL 0xffffffff
#define IOMMU_ENABLE_REG 0x020
@ -679,8 +681,7 @@ sun50i_iommu_domain_alloc_paging(struct device *dev)
if (!sun50i_domain)
return NULL;
sun50i_domain->dt = (u32 *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
get_order(DT_SIZE));
sun50i_domain->dt = iommu_alloc_pages(GFP_KERNEL, get_order(DT_SIZE));
if (!sun50i_domain->dt)
goto err_free_domain;
@ -702,7 +703,7 @@ static void sun50i_iommu_domain_free(struct iommu_domain *domain)
{
struct sun50i_iommu_domain *sun50i_domain = to_sun50i_domain(domain);
free_pages((unsigned long)sun50i_domain->dt, get_order(DT_SIZE));
iommu_free_pages(sun50i_domain->dt, get_order(DT_SIZE));
sun50i_domain->dt = NULL;
kfree(sun50i_domain);

18
drivers/iommu/tegra-smmu.c
View File

@ -19,6 +19,8 @@
#include <soc/tegra/ahb.h>
#include <soc/tegra/mc.h>
#include "iommu-pages.h"
struct tegra_smmu_group {
struct list_head list;
struct tegra_smmu *smmu;
@ -282,7 +284,7 @@ static struct iommu_domain *tegra_smmu_domain_alloc_paging(struct device *dev)
as->attr = SMMU_PD_READABLE | SMMU_PD_WRITABLE | SMMU_PD_NONSECURE;
as->pd = alloc_page(GFP_KERNEL | __GFP_DMA | __GFP_ZERO);
as->pd = __iommu_alloc_pages(GFP_KERNEL | __GFP_DMA, 0);
if (!as->pd) {
kfree(as);
return NULL;
@ -290,7 +292,7 @@ static struct iommu_domain *tegra_smmu_domain_alloc_paging(struct device *dev)
as->count = kcalloc(SMMU_NUM_PDE, sizeof(u32), GFP_KERNEL);
if (!as->count) {
__free_page(as->pd);
__iommu_free_pages(as->pd, 0);
kfree(as);
return NULL;
}
@ -298,7 +300,7 @@ static struct iommu_domain *tegra_smmu_domain_alloc_paging(struct device *dev)
as->pts = kcalloc(SMMU_NUM_PDE, sizeof(*as->pts), GFP_KERNEL);
if (!as->pts) {
kfree(as->count);
__free_page(as->pd);
__iommu_free_pages(as->pd, 0);
kfree(as);
return NULL;
}
@ -599,14 +601,14 @@ static u32 *as_get_pte(struct tegra_smmu_as *as, dma_addr_t iova,
dma = dma_map_page(smmu->dev, page, 0, SMMU_SIZE_PT,
DMA_TO_DEVICE);
if (dma_mapping_error(smmu->dev, dma)) {
__free_page(page);
__iommu_free_pages(page, 0);
return NULL;
}
if (!smmu_dma_addr_valid(smmu, dma)) {
dma_unmap_page(smmu->dev, dma, SMMU_SIZE_PT,
DMA_TO_DEVICE);
__free_page(page);
__iommu_free_pages(page, 0);
return NULL;
}
@ -649,7 +651,7 @@ static void tegra_smmu_pte_put_use(struct tegra_smmu_as *as, unsigned long iova)
tegra_smmu_set_pde(as, iova, 0);
dma_unmap_page(smmu->dev, pte_dma, SMMU_SIZE_PT, DMA_TO_DEVICE);
__free_page(page);
__iommu_free_pages(page, 0);
as->pts[pde] = NULL;
}
}
@ -688,7 +690,7 @@ static struct page *as_get_pde_page(struct tegra_smmu_as *as,
if (gfpflags_allow_blocking(gfp))
spin_unlock_irqrestore(&as->lock, *flags);
page = alloc_page(gfp | __GFP_DMA | __GFP_ZERO);
page = __iommu_alloc_pages(gfp | __GFP_DMA, 0);
if (gfpflags_allow_blocking(gfp))
spin_lock_irqsave(&as->lock, *flags);
@ -700,7 +702,7 @@ static struct page *as_get_pde_page(struct tegra_smmu_as *as,
*/
if (as->pts[pde]) {
if (page)
__free_page(page);
__iommu_free_pages(page, 0);
page = as->pts[pde];
}

5
include/linux/mmzone.h
View File

@ -205,7 +205,10 @@ enum node_stat_item {
NR_KERNEL_SCS_KB, /* measured in KiB */
#endif
NR_PAGETABLE, /* used for pagetables */
NR_SECONDARY_PAGETABLE, /* secondary pagetables, e.g. KVM pagetables */
NR_SECONDARY_PAGETABLE, /* secondary pagetables, KVM & IOMMU */
#ifdef CONFIG_IOMMU_SUPPORT
NR_IOMMU_PAGES, /* # of pages allocated by IOMMU */
#endif
#ifdef CONFIG_SWAP
NR_SWAPCACHE,
#endif

3
mm/vmstat.c
View File

@ -1242,6 +1242,9 @@ const char * const vmstat_text[] = {
#endif
"nr_page_table_pages",
"nr_sec_page_table_pages",
#ifdef CONFIG_IOMMU_SUPPORT
"nr_iommu_pages",
#endif
#ifdef CONFIG_SWAP
"nr_swapcached",
#endif