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powerpc/powernv/ioda: Allocate indirect TCE levels of cached userspace addresses on demand 

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.

a68bd1267b ("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: a68bd1267b ("powerpc/powernv/ioda: Allocate indirect TCE levels on demand")
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Alexey Kardashevskiy 2018-09-28 16:45:39 +10:00 committed by Michael Ellerman
parent 8c6c942d33
commit bdbf649efe
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/platforms/powernv/pci-ioda-tce.c
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@ -299,7 +299,7 @@ long pnv_pci_ioda2_table_alloc_pages(int nid, __u64 bus_offset,
if (alloc_userspace_copy) { if (alloc_userspace_copy) {
offset = 0; offset = 0;
uas = pnv_pci_ioda2_table_do_alloc_pages(nid, level_shift, uas = pnv_pci_ioda2_table_do_alloc_pages(nid, level_shift,
levels, tce_table_size, &offset, tmplevels, tce_table_size, &offset,
&total_allocated_uas); &total_allocated_uas);
if (!uas) if (!uas)
goto free_tces_exit; goto free_tces_exit;