@@ -184,6 +184,7 @@ struct kvmppc_spapr_tce_table {
u64 liobn;
struct rcu_head rcu;
u32 page_shift;
+ u64 offset; /* in pages */
u64 size; /* window size in pages */
struct page *pages[0];
};
@@ -75,7 +75,9 @@ long kvmppc_ioba_validate(struct kvmppc_spapr_tce_table *stt,
unsigned long mask = (1ULL << stt->page_shift) - 1;
unsigned long idx = ioba >> stt->page_shift;
- if ((ioba & mask) || (idx + npages > stt->size) || (idx + npages < idx))
+ if ((ioba & mask) || (idx < stt->offset) ||
+ (idx - stt->offset + npages > stt->size) ||
+ (idx + npages < idx))
return H_PARAMETER;
return H_SUCCESS;
@@ -147,6 +149,7 @@ void kvmppc_tce_put(struct kvmppc_spapr_tce_table *stt,
struct page *page;
u64 *tbl;
+ idx -= stt->offset;
page = stt->pages[idx / TCES_PER_PAGE];
tbl = kvmppc_page_address(page);
@@ -335,7 +338,7 @@ long kvmppc_h_get_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
if (ret != H_SUCCESS)
return ret;
- idx = ioba >> stt->page_shift;
+ idx = (ioba >> stt->page_shift) - stt->offset;
page = stt->pages[idx / TCES_PER_PAGE];
tbl = (u64 *)page_address(page);