On Fri, Sep 28, 2018 at 04:45:39PM +1000, Alexey Kardashevskiy wrote:
> The powernv platform maintains 2 TCE tables for VFIO - a hardware TCE
> table and a table with userspace addresses; the latter is used for
> marking pages dirty when corresponging TCEs are unmapped from
> the hardware table.
>
> a68bd1267b72 ("powerpc/powernv/ioda: Allocate indirect TCE levels
> on demand") enabled on-demand allocation of the hardware table,
> however it missed the other table so it has still been fully allocated
> at the boot time. This fixes the issue by allocating a single level,
> just like we do for the hardware table.
>
> Fixes: a68bd1267b72 ("powerpc/powernv/ioda: Allocate indirect TCE levels on
> demand")
> Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru>
Reviewed-by: David Gibson <da...@gibson.dropbear.id.au>
> ---
> arch/powerpc/platforms/powernv/pci-ioda-tce.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/platforms/powernv/pci-ioda-tce.c
> b/arch/powerpc/platforms/powernv/pci-ioda-tce.c
> index fe96910..7639b21 100644
> --- a/arch/powerpc/platforms/powernv/pci-ioda-tce.c
> +++ b/arch/powerpc/platforms/powernv/pci-ioda-tce.c
> @@ -299,7 +299,7 @@ long pnv_pci_ioda2_table_alloc_pages(int nid, __u64
> bus_offset,
> if (alloc_userspace_copy) {
> offset = 0;
> uas = pnv_pci_ioda2_table_do_alloc_pages(nid, level_shift,
> - levels, tce_table_size, &offset,
> + tmplevels, tce_table_size, &offset,
> &total_allocated_uas);
> if (!uas)
> goto free_tces_exit;
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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