diff options
author | Joerg Roedel <joerg.roedel@amd.com> | 2011-11-25 11:41:31 +0100 |
---|---|---|
committer | Hiroshi DOYU <hdoyu@nvidia.com> | 2012-01-23 11:11:39 +0200 |
commit | 6ff803185644748146d45b9dbaade53cec7e6f24 (patch) | |
tree | e42c93353e26d81f53181f050160f98ce4d10cdc /drivers/iommu/amd_iommu_init.c | |
parent | e4dd7206a1f364077a3887199766d3886a8ebb67 (diff) |
iommu/amd: Enable GT mode when supported by IOMMU
This feature needs to be enabled before IOMMUv2 DTEs can be
set up.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'drivers/iommu/amd_iommu_init.c')
-rw-r--r-- | drivers/iommu/amd_iommu_init.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 60716cefa7af..2c25ae306e7c 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -623,6 +623,14 @@ static void __init free_ppr_log(struct amd_iommu *iommu) free_pages((unsigned long)iommu->ppr_log, get_order(PPR_LOG_SIZE)); } +static void iommu_enable_gt(struct amd_iommu *iommu) +{ + if (!iommu_feature(iommu, FEATURE_GT)) + return; + + iommu_feature_enable(iommu, CONTROL_GT_EN); +} + /* sets a specific bit in the device table entry. */ static void set_dev_entry_bit(u16 devid, u8 bit) { @@ -1338,6 +1346,7 @@ static void enable_iommus(void) iommu_enable_command_buffer(iommu); iommu_enable_event_buffer(iommu); iommu_enable_ppr_log(iommu); + iommu_enable_gt(iommu); iommu_set_exclusion_range(iommu); iommu_init_msi(iommu); iommu_enable(iommu); |