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vdpa/mlx5: Fix oversized null mkey longer than 32bit

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create_user_mr() has correct code to count the number of null keys
used to fill in a hole for the memory map. However, fill_indir()
does not follow the same to cap the range up to the 1GB limit
correspondingly. Fill in more null keys for the gaps in between,
so that null keys are correctly populated.

Fixes: 94abbccdf2 ("vdpa/mlx5: Add shared memory registration code")
Cc: stable@vger.kernel.org
Reported-by: Cong Meng <cong.meng@oracle.com>
Signed-off-by: Si-Wei Liu <si-wei.liu@oracle.com>
Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
Acked-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20250220193732.521462-2-dtatulea@nvidia.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Si-Wei Liu 2025-02-20 21:37:33 +02:00 committed by Michael S. Tsirkin
parent 439252e167
commit a6097e0a54
1 changed files with 5 additions and 2 deletions
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7
drivers/vdpa/mlx5/core/mr.c
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@ -190,9 +190,12 @@ static void fill_indir(struct mlx5_vdpa_dev *mvdev, struct mlx5_vdpa_mr *mkey, v
klm->bcount = cpu_to_be32(klm_bcount(dmr->end - dmr->start));
preve = dmr->end;
} else {
u64 bcount = min_t(u64, dmr->start - preve, MAX_KLM_SIZE);
klm->key = cpu_to_be32(mvdev->res.null_mkey);
klm->bcount = cpu_to_be32(klm_bcount(dmr->start - preve));
preve = dmr->start;
klm->bcount = cpu_to_be32(klm_bcount(bcount));
preve += bcount;
goto again;
}
}