aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--drivers/pci/intel-iommu.c85
1 files changed, 55 insertions, 30 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index c1c59a619650..3be931b3bf98 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -105,28 +105,53 @@ struct context_entry {
105 u64 lo; 105 u64 lo;
106 u64 hi; 106 u64 hi;
107}; 107};
108#define context_present(c) ((c).lo & 1) 108
109#define context_fault_disable(c) (((c).lo >> 1) & 1) 109static inline bool context_present(struct context_entry *context)
110#define context_translation_type(c) (((c).lo >> 2) & 3) 110{
111#define context_address_root(c) ((c).lo & VTD_PAGE_MASK) 111 return (context->lo & 1);
112#define context_address_width(c) ((c).hi & 7) 112}
113#define context_domain_id(c) (((c).hi >> 8) & ((1 << 16) - 1)) 113static inline void context_set_present(struct context_entry *context)
114 114{
115#define context_set_present(c) do {(c).lo |= 1;} while (0) 115 context->lo |= 1;
116#define context_set_fault_enable(c) \ 116}
117 do {(c).lo &= (((u64)-1) << 2) | 1;} while (0) 117
118#define context_set_translation_type(c, val) \ 118static inline void context_set_fault_enable(struct context_entry *context)
119 do { \ 119{
120 (c).lo &= (((u64)-1) << 4) | 3; \ 120 context->lo &= (((u64)-1) << 2) | 1;
121 (c).lo |= ((val) & 3) << 2; \ 121}
122 } while (0) 122
123#define CONTEXT_TT_MULTI_LEVEL 0 123#define CONTEXT_TT_MULTI_LEVEL 0
124#define context_set_address_root(c, val) \ 124
125 do {(c).lo |= (val) & VTD_PAGE_MASK; } while (0) 125static inline void context_set_translation_type(struct context_entry *context,
126#define context_set_address_width(c, val) do {(c).hi |= (val) & 7;} while (0) 126 unsigned long value)
127#define context_set_domain_id(c, val) \ 127{
128 do {(c).hi |= ((val) & ((1 << 16) - 1)) << 8;} while (0) 128 context->lo &= (((u64)-1) << 4) | 3;
129#define context_clear_entry(c) do {(c).lo = 0; (c).hi = 0;} while (0) 129 context->lo |= (value & 3) << 2;
130}
131
132static inline void context_set_address_root(struct context_entry *context,
133 unsigned long value)
134{
135 context->lo |= value & VTD_PAGE_MASK;
136}
137
138static inline void context_set_address_width(struct context_entry *context,
139 unsigned long value)
140{
141 context->hi |= value & 7;
142}
143
144static inline void context_set_domain_id(struct context_entry *context,
145 unsigned long value)
146{
147 context->hi |= (value & ((1 << 16) - 1)) << 8;
148}
149
150static inline void context_clear_entry(struct context_entry *context)
151{
152 context->lo = 0;
153 context->hi = 0;
154}
130 155
131/* 156/*
132 * 0: readable 157 * 0: readable
@@ -349,7 +374,7 @@ static int device_context_mapped(struct intel_iommu *iommu, u8 bus, u8 devfn)
349 ret = 0; 374 ret = 0;
350 goto out; 375 goto out;
351 } 376 }
352 ret = context_present(context[devfn]); 377 ret = context_present(&context[devfn]);
353out: 378out:
354 spin_unlock_irqrestore(&iommu->lock, flags); 379 spin_unlock_irqrestore(&iommu->lock, flags);
355 return ret; 380 return ret;
@@ -365,7 +390,7 @@ static void clear_context_table(struct intel_iommu *iommu, u8 bus, u8 devfn)
365 root = &iommu->root_entry[bus]; 390 root = &iommu->root_entry[bus];
366 context = get_context_addr_from_root(root); 391 context = get_context_addr_from_root(root);
367 if (context) { 392 if (context) {
368 context_clear_entry(context[devfn]); 393 context_clear_entry(&context[devfn]);
369 __iommu_flush_cache(iommu, &context[devfn], \ 394 __iommu_flush_cache(iommu, &context[devfn], \
370 sizeof(*context)); 395 sizeof(*context));
371 } 396 }
@@ -1284,17 +1309,17 @@ static int domain_context_mapping_one(struct dmar_domain *domain,
1284 if (!context) 1309 if (!context)
1285 return -ENOMEM; 1310 return -ENOMEM;
1286 spin_lock_irqsave(&iommu->lock, flags); 1311 spin_lock_irqsave(&iommu->lock, flags);
1287 if (context_present(*context)) { 1312 if (context_present(context)) {
1288 spin_unlock_irqrestore(&iommu->lock, flags); 1313 spin_unlock_irqrestore(&iommu->lock, flags);
1289 return 0; 1314 return 0;
1290 } 1315 }
1291 1316
1292 context_set_domain_id(*context, domain->id); 1317 context_set_domain_id(context, domain->id);
1293 context_set_address_width(*context, domain->agaw); 1318 context_set_address_width(context, domain->agaw);
1294 context_set_address_root(*context, virt_to_phys(domain->pgd)); 1319 context_set_address_root(context, virt_to_phys(domain->pgd));
1295 context_set_translation_type(*context, CONTEXT_TT_MULTI_LEVEL); 1320 context_set_translation_type(context, CONTEXT_TT_MULTI_LEVEL);
1296 context_set_fault_enable(*context); 1321 context_set_fault_enable(context);
1297 context_set_present(*context); 1322 context_set_present(context);
1298 __iommu_flush_cache(iommu, context, sizeof(*context)); 1323 __iommu_flush_cache(iommu, context, sizeof(*context));
1299 1324
1300 /* it's a non-present to present mapping */ 1325 /* it's a non-present to present mapping */