pseries: Don't allow TCE (iommu) tables to be registered with duplicate LIOBNs
The PAPR specification requires that every bus or device mediated by the IOMMU have a unique Logical IO Bus Number (LIOBN). This patch adds a check to enforce this, which will help catch errors in configuration earlier. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Alexander Graf <agraf@suse.de>
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@ -120,6 +120,12 @@ DMAContext *spapr_tce_new_dma_context(uint32_t liobn, size_t window_size)
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{
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{
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sPAPRTCETable *tcet;
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sPAPRTCETable *tcet;
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if (spapr_tce_find_by_liobn(liobn)) {
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fprintf(stderr, "Attempted to create TCE table with duplicate"
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" LIOBN 0x%x\n", liobn);
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return NULL;
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}
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if (!window_size) {
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if (!window_size) {
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return NULL;
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return NULL;
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}
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}
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