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hv: minimize the case of "identifier reuse"

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Identifier reuse may arise confusion. So should minimize the case of it
as much as possible. This patch is try to do this except the PCI related
module.

Tracked-On: #861
Signed-off-by: Li, Fei1 <fei1.li@intel.com>
This commit is contained in:
Li, Fei1
2018-12-05 21:33:05 +08:00
committed by wenlingz
parent 3afc5113c4
commit ae9d4361fd
7 changed files with 68 additions and 71 deletions
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12
hypervisor/arch/x86/vtd.c
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@@ -829,7 +829,7 @@ static int add_iommu_device(struct iommu_domain *domain, uint16_t segment, uint8
struct dmar_drhd_rt *dmar_unit;
struct dmar_root_entry *root_table;
uint64_t context_table_addr;
struct dmar_context_entry *context_table;
struct dmar_context_entry *context;
struct dmar_root_entry *root_entry;
struct dmar_context_entry *context_entry;
uint64_t upper;
@@ -888,8 +888,8 @@ static int add_iommu_device(struct iommu_domain *domain, uint16_t segment, uint8
context_table_addr = context_table_addr << PAGE_SHIFT;
context_table = (struct dmar_context_entry *)hpa2hva(context_table_addr);
context_entry = context_table + devfun;
context = (struct dmar_context_entry *)hpa2hva(context_table_addr);
context_entry = context + devfun;
/* the context entry should not be present */
if (dmar_get_bitslice(context_entry->lower, CTX_ENTRY_LOWER_P_MASK, CTX_ENTRY_LOWER_P_POS) != 0UL) {
@@ -942,7 +942,7 @@ static int remove_iommu_device(const struct iommu_domain *domain, uint16_t segme
struct dmar_drhd_rt *dmar_unit;
struct dmar_root_entry *root_table;
uint64_t context_table_addr;
struct dmar_context_entry *context_table;
struct dmar_context_entry *context;
struct dmar_root_entry *root_entry;
struct dmar_context_entry *context_entry;
uint16_t dom_id;
@@ -958,9 +958,9 @@ static int remove_iommu_device(const struct iommu_domain *domain, uint16_t segme
context_table_addr = dmar_get_bitslice(root_entry->lower, ROOT_ENTRY_LOWER_CTP_MASK, ROOT_ENTRY_LOWER_CTP_POS);
context_table_addr = context_table_addr << PAGE_SHIFT;
context_table = (struct dmar_context_entry *)hpa2hva(context_table_addr);
context = (struct dmar_context_entry *)hpa2hva(context_table_addr);
context_entry = context_table + devfun;
context_entry = context + devfun;
dom_id = (uint16_t)dmar_get_bitslice(context_entry->upper, CTX_ENTRY_UPPER_DID_MASK, CTX_ENTRY_UPPER_DID_POS);
if (dom_id != vmid_to_domainid(domain->vm_id)) {