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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>
This commit is contained in:
Joerg Roedel 2011-11-25 11:41:31 +01:00
parent 1a29ac014a
commit cbc33a9085
2 changed files with 10 additions and 0 deletions
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9
drivers/iommu/amd_iommu_init.c
View File

@ -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);

1
drivers/iommu/amd_iommu_types.h
View File

@ -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