diff options
| author | Will Deacon <will@kernel.org> | 2020-01-10 11:40:33 +0000 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-01-10 15:39:43 +0000 |
| commit | 30d2acb67348537dbf3180057c11f092f4603090 (patch) | |
| tree | 5aa2c21ab73f1d38b2f7392ca85044d708a2d756 /drivers/iommu | |
| parent | d1e5f26f14272b5039cc198569ec4fabed14e6db (diff) | |
| download | linux-30d2acb67348537dbf3180057c11f092f4603090.tar.bz2 | |
iommu/io-pgtable-arm: Support non-coherent stage-2 page tables
Commit 9e6ea59f3ff3 ("iommu/io-pgtable: Support non-coherent page tables")
added support for non-coherent page-table walks to the Arm IOMMU page-table
backends. Unfortunately, it left the stage-2 allocator unchanged, so let's
hook that up in the same way.
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/io-pgtable-arm.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c index 7b422b9fe05b..ab440b52a5f4 100644 --- a/drivers/iommu/io-pgtable-arm.c +++ b/drivers/iommu/io-pgtable-arm.c @@ -910,10 +910,16 @@ arm_64_lpae_alloc_pgtable_s2(struct io_pgtable_cfg *cfg, void *cookie) } /* VTCR */ - reg = ARM_64_LPAE_S2_TCR_RES1 | - (ARM_LPAE_TCR_SH_IS << ARM_LPAE_TCR_SH0_SHIFT) | - (ARM_LPAE_TCR_RGN_WBWA << ARM_LPAE_TCR_IRGN0_SHIFT) | - (ARM_LPAE_TCR_RGN_WBWA << ARM_LPAE_TCR_ORGN0_SHIFT); + reg = ARM_64_LPAE_S2_TCR_RES1; + if (cfg->coherent_walk) { + reg |= (ARM_LPAE_TCR_SH_IS << ARM_LPAE_TCR_SH0_SHIFT) | + (ARM_LPAE_TCR_RGN_WBWA << ARM_LPAE_TCR_IRGN0_SHIFT) | + (ARM_LPAE_TCR_RGN_WBWA << ARM_LPAE_TCR_ORGN0_SHIFT); + } else { + reg |= (ARM_LPAE_TCR_SH_OS << ARM_LPAE_TCR_SH0_SHIFT) | + (ARM_LPAE_TCR_RGN_NC << ARM_LPAE_TCR_IRGN0_SHIFT) | + (ARM_LPAE_TCR_RGN_NC << ARM_LPAE_TCR_ORGN0_SHIFT); + } sl = data->start_level; |