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iommu/vt-d: Remove duplicate identity domain flag 

The iommu_domain data structure already has the "type" field to keep the
type of a domain. It's unnecessary to have the DOMAIN_FLAG_STATIC_IDENTITY
flag in the vt-d implementation. This cleans it up with no functionality
change.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20210926114535.923263-1-baolu.lu@linux.intel.com
Link: https://lore.kernel.org/r/20211014053839.727419-4-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Lu Baolu 2021-10-14 13:38:33 +08:00 committed by Joerg Roedel
parent 914ff7719e
commit b34380a6d7
2 changed files with 4 additions and 8 deletions
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9
drivers/iommu/intel/iommu.c
View File

@ -528,7 +528,7 @@ static inline void free_devinfo_mem(void *vaddr)
static inline int domain_type_is_si(struct dmar_domain *domain)
{
return domain->flags & DOMAIN_FLAG_STATIC_IDENTITY;
return domain->domain.type == IOMMU_DOMAIN_IDENTITY;
}
static inline bool domain_use_first_level(struct dmar_domain *domain)
@ -1996,7 +1996,7 @@ static bool first_level_by_default(void)
return scalable_mode_support() && intel_cap_flts_sanity();
}
static struct dmar_domain *alloc_domain(int flags)
static struct dmar_domain *alloc_domain(unsigned int type)
{
struct dmar_domain *domain;
@ -2006,7 +2006,6 @@ static struct dmar_domain *alloc_domain(int flags)
memset(domain, 0, sizeof(*domain));
domain->nid = NUMA_NO_NODE;
domain->flags = flags;
if (first_level_by_default())
domain->flags |= DOMAIN_FLAG_USE_FIRST_LEVEL;
domain->has_iotlb_device = false;
@ -2825,7 +2824,7 @@ static int __init si_domain_init(int hw)
struct device *dev;
int i, nid, ret;
si_domain = alloc_domain(DOMAIN_FLAG_STATIC_IDENTITY);
si_domain = alloc_domain(IOMMU_DOMAIN_IDENTITY);
if (!si_domain)
return -EFAULT;
@ -4634,7 +4633,7 @@ static struct iommu_domain *intel_iommu_domain_alloc(unsigned type)
case IOMMU_DOMAIN_DMA:
case IOMMU_DOMAIN_DMA_FQ:
case IOMMU_DOMAIN_UNMANAGED:
dmar_domain = alloc_domain(0);
dmar_domain = alloc_domain(type);
if (!dmar_domain) {
pr_err("Can't allocate dmar_domain\n");
return NULL;

3
include/linux/intel-iommu.h
View File

@ -517,9 +517,6 @@ struct context_entry {
u64 hi;
};
/* si_domain contains mulitple devices */
#define DOMAIN_FLAG_STATIC_IDENTITY BIT(0)
/*
* When VT-d works in the scalable mode, it allows DMA translation to
* happen through either first level or second level page table. This