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| author | David Gibson <david@gibson.dropbear.id.au> | 2012-12-03 16:42:13 +0000 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2012-12-14 13:12:55 +0100 |
| commit | 8b1853e7d8c2bf8c6a9f023ab98ba0e8a38bd086 (patch) | |
| tree | 762f9e6c05e342f2a198216f32a8d710a846f0db /hw/spapr_iommu.c | |
| parent | 3eddc1be1ccb26387f8f960f8a3d8c417064a91f (diff) | |
| download | qemu-8b1853e7d8c2bf8c6a9f023ab98ba0e8a38bd086.zip qemu-8b1853e7d8c2bf8c6a9f023ab98ba0e8a38bd086.tar.gz qemu-8b1853e7d8c2bf8c6a9f023ab98ba0e8a38bd086.tar.bz2 | |
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>
Diffstat (limited to 'hw/spapr_iommu.c')
| -rw-r--r-- | hw/spapr_iommu.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/hw/spapr_iommu.c b/hw/spapr_iommu.c index 02d78cc..3011b25 100644 --- a/hw/spapr_iommu.c +++ b/hw/spapr_iommu.c @@ -120,6 +120,12 @@ DMAContext *spapr_tce_new_dma_context(uint32_t liobn, size_t window_size) { sPAPRTCETable *tcet; + if (spapr_tce_find_by_liobn(liobn)) { + fprintf(stderr, "Attempted to create TCE table with duplicate" + " LIOBN 0x%x\n", liobn); + return NULL; + } + if (!window_size) { return NULL; } |