diff options
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd_iommu_init.c | 9 | ||||
| -rw-r--r-- | drivers/iommu/amd_iommu_types.h | 1 |
2 files changed, 10 insertions, 0 deletions
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 60716cefa7a..2c25ae306e7 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); diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h index 4dc230904fe..a6e1dc616af 100644 --- a/drivers/iommu/amd_iommu_types.h +++ b/drivers/iommu/amd_iommu_types.h @@ -129,6 +129,7 @@ #define CONTROL_PPFLOG_EN 0x0dULL #define CONTROL_PPFINT_EN 0x0eULL #define CONTROL_PPR_EN 0x0fULL +#define CONTROL_GT_EN 0x10ULL /* command specific defines */ #define CMD_COMPL_WAIT 0x01 |