xiaomi-sm8450/android_kernel_xiaomi_sm8450
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calculate agaw for each iommu

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"SAGAW" capability may be different across iommus. Use a default agaw, but if default agaw is not supported in some iommus, choose a less supported agaw.

Signed-off-by: Weidong Han <weidong.han@intel.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Weidong Han
2008-12-08 15:34:06 +08:00
committed by Joerg Roedel
parent 8c11e798ee
commit 1b5736839a
4 changed files with 34 additions and 0 deletions
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1
include/linux/dma_remapping.h
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@@ -17,6 +17,7 @@ struct dmar_domain;
struct root_entry;
extern void free_dmar_iommu(struct intel_iommu *iommu);
extern int iommu_calculate_agaw(struct intel_iommu *iommu);
extern int dmar_disabled;

1
include/linux/intel-iommu.h
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@@ -290,6 +290,7 @@ struct intel_iommu {
u32 gcmd; /* Holds TE, EAFL. Don't need SRTP, SFL, WBF */
spinlock_t register_lock; /* protect register handling */
int seq_id; /* sequence id of the iommu */
int agaw; /* agaw of this iommu */
#ifdef CONFIG_DMAR
unsigned long *domain_ids; /* bitmap of domains */