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Date: Mon, 27 May 2019 10:55:35 +0200
From: Eric Auger <eric.auger@...hat.com>
To: eric.auger.pro@...il.com, eric.auger@...hat.com, joro@...tes.org,
iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
dwmw2@...radead.org, lorenzo.pieralisi@....com,
robin.murphy@....com, will.deacon@....com, hanjun.guo@...aro.org,
sudeep.holla@....com
Cc: alex.williamson@...hat.com, shameerali.kolothum.thodi@...wei.com
Subject: [PATCH v4 2/8] iommu: Pass a GFP flag parameter to iommu_alloc_resv_region()
We plan to call iommu_alloc_resv_region in a non preemptible section.
Pass a GFP flag to the function and update all the call sites.
Signed-off-by: Eric Auger <eric.auger@...hat.com>
---
drivers/acpi/arm64/iort.c | 3 ++-
drivers/iommu/amd_iommu.c | 7 ++++---
drivers/iommu/arm-smmu-v3.c | 2 +-
drivers/iommu/arm-smmu.c | 2 +-
drivers/iommu/intel-iommu.c | 4 ++--
drivers/iommu/iommu.c | 7 ++++---
include/linux/iommu.h | 2 +-
7 files changed, 15 insertions(+), 12 deletions(-)
diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index b5390b4c9ade..2d922db4978e 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -843,7 +843,8 @@ int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
struct iommu_resv_region *region;
region = iommu_alloc_resv_region(base + SZ_64K, SZ_64K,
- prot, IOMMU_RESV_MSI);
+ prot, IOMMU_RESV_MSI,
+ GFP_KERNEL);
if (region) {
list_add_tail(®ion->list, head);
resv++;
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 09c9e45f7fa2..f2eb8e9cd8a6 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -3136,7 +3136,8 @@ static void amd_iommu_get_resv_regions(struct device *dev,
type = IOMMU_RESV_RESERVED;
region = iommu_alloc_resv_region(entry->address_start,
- length, prot, type);
+ length, prot, type,
+ GFP_KERNEL);
if (!region) {
dev_err(dev, "Out of memory allocating dm-regions\n");
return;
@@ -3146,14 +3147,14 @@ static void amd_iommu_get_resv_regions(struct device *dev,
region = iommu_alloc_resv_region(MSI_RANGE_START,
MSI_RANGE_END - MSI_RANGE_START + 1,
- 0, IOMMU_RESV_MSI);
+ 0, IOMMU_RESV_MSI, GFP_KERNEL);
if (!region)
return;
list_add_tail(®ion->list, head);
region = iommu_alloc_resv_region(HT_RANGE_START,
HT_RANGE_END - HT_RANGE_START + 1,
- 0, IOMMU_RESV_RESERVED);
+ 0, IOMMU_RESV_RESERVED, GFP_KERNEL);
if (!region)
return;
list_add_tail(®ion->list, head);
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index 4d5a694f02c2..f9b1279ef5bf 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -2226,7 +2226,7 @@ static void arm_smmu_get_resv_regions(struct device *dev,
int prot = IOMMU_WRITE | IOMMU_NOEXEC | IOMMU_MMIO;
region = iommu_alloc_resv_region(MSI_IOVA_BASE, MSI_IOVA_LENGTH,
- prot, IOMMU_RESV_SW_MSI);
+ prot, IOMMU_RESV_SW_MSI, GFP_KERNEL);
if (!region)
return;
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 5e54cc0a28b3..646e76813e91 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -1670,7 +1670,7 @@ static void arm_smmu_get_resv_regions(struct device *dev,
int prot = IOMMU_WRITE | IOMMU_NOEXEC | IOMMU_MMIO;
region = iommu_alloc_resv_region(MSI_IOVA_BASE, MSI_IOVA_LENGTH,
- prot, IOMMU_RESV_SW_MSI);
+ prot, IOMMU_RESV_SW_MSI, GFP_KERNEL);
if (!region)
return;
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index a209199f3af6..2be36dff189a 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -4220,7 +4220,7 @@ int __init dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg)
length = rmrr->end_address - rmrr->base_address + 1;
rmrru->resv = iommu_alloc_resv_region(rmrr->base_address, length, prot,
- IOMMU_RESV_DIRECT);
+ IOMMU_RESV_DIRECT, GFP_KERNEL);
if (!rmrru->resv)
goto free_rmrru;
@@ -5489,7 +5489,7 @@ static void intel_iommu_get_resv_regions(struct device *device,
reg = iommu_alloc_resv_region(IOAPIC_RANGE_START,
IOAPIC_RANGE_END - IOAPIC_RANGE_START + 1,
- 0, IOMMU_RESV_MSI);
+ 0, IOMMU_RESV_MSI, GFP_KERNEL);
if (!reg)
return;
list_add_tail(®->list, head);
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index f961f71e4ff8..7dd1a57217e3 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -259,7 +259,7 @@ static int iommu_insert_resv_region(struct iommu_resv_region *new,
}
insert:
region = iommu_alloc_resv_region(new->start, new->length,
- new->prot, new->type);
+ new->prot, new->type, GFP_KERNEL);
if (!region)
return -ENOMEM;
@@ -1893,11 +1893,12 @@ void iommu_put_resv_regions(struct device *dev, struct list_head *list)
struct iommu_resv_region *iommu_alloc_resv_region(phys_addr_t start,
size_t length, int prot,
- enum iommu_resv_type type)
+ enum iommu_resv_type type,
+ gfp_t flags)
{
struct iommu_resv_region *region;
- region = kzalloc(sizeof(*region), GFP_KERNEL);
+ region = kzalloc(sizeof(*region), flags);
if (!region)
return NULL;
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index a815cf6f6f47..ba91666998fb 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -364,7 +364,7 @@ extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
extern int iommu_request_dm_for_dev(struct device *dev);
extern struct iommu_resv_region *
iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot,
- enum iommu_resv_type type);
+ enum iommu_resv_type type, gfp_t flags);
extern int iommu_get_group_resv_regions(struct iommu_group *group,
struct list_head *head);
--
2.20.1
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