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iommu/vt-d: Don't pre-allocate domain ids for si_domain

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There is no reason for this special handling of the
si_domain. The per-iommu domain-id can be allocated
on-demand like for any other domain. So remove the
pre-allocation code.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2015-07-21 15:40:06 +02:00
parent a1ddcbe930
commit 0dc7971594
1 changed files with 1 additions and 27 deletions
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28
drivers/iommu/intel-iommu.c
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@ -2558,37 +2558,18 @@ static int md_domain_init(struct dmar_domain *domain, int guest_width);
static int __init si_domain_init(int hw)
{
struct dmar_drhd_unit *drhd;
struct intel_iommu *iommu;
int nid, ret = 0;
bool first = true;
si_domain = alloc_domain(DOMAIN_FLAG_STATIC_IDENTITY);
if (!si_domain)
return -EFAULT;
for_each_active_iommu(iommu, drhd) {
ret = iommu_attach_domain(si_domain, iommu);
if (ret < 0) {
domain_exit(si_domain);
return -EFAULT;
} else if (first) {
si_domain->id = ret;
first = false;
} else if (si_domain->id != ret) {
domain_exit(si_domain);
return -EFAULT;
}
domain_attach_iommu(si_domain, iommu);
}
if (md_domain_init(si_domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) {
domain_exit(si_domain);
return -EFAULT;
}
pr_debug("Identity mapping domain is domain %d\n",
si_domain->id);
pr_debug("Identity mapping domain allocated\n");
if (hw)
return 0;
@ -4197,13 +4178,6 @@ static int intel_iommu_add(struct dmar_drhd_unit *dmaru)
iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH);
iommu_enable_translation(iommu);
if (si_domain) {
ret = iommu_attach_domain(si_domain, iommu);
if (ret < 0 || si_domain->id != ret)
goto disable_iommu;
domain_attach_iommu(si_domain, iommu);
}
iommu_disable_protect_mem_regions(iommu);
return 0;