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iommu/amd: Add support for device based TLB invalidation

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Add support to invalidate TLB/IOTLB for the given device.

These functions will be used in subsequent patches where we will
introduce per device GCR3 table and SVA support.

Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20240205115615.6053-8-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Vasant Hegde 2024-02-05 11:56:05 +00:00 committed by Joerg Roedel
parent 7b4e5623d8
commit 474bf01ed9
2 changed files with 28 additions and 0 deletions
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5
drivers/iommu/amd/amd_iommu.h
View File

@ -55,6 +55,11 @@ void amd_iommu_domain_update(struct protection_domain *domain);
void amd_iommu_domain_flush_complete(struct protection_domain *domain);
void amd_iommu_domain_flush_pages(struct protection_domain *domain,
u64 address, size_t size);
void amd_iommu_dev_flush_pasid_pages(struct iommu_dev_data *dev_data,
ioasid_t pasid, u64 address, size_t size);
void amd_iommu_dev_flush_pasid_all(struct iommu_dev_data *dev_data,
ioasid_t pasid);
int amd_iommu_flush_tlb(struct iommu_domain *dom, u32 pasid);
int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, u32 pasid,
unsigned long cr3);

23
drivers/iommu/amd/iommu.c
View File

@ -1538,6 +1538,29 @@ static void amd_iommu_domain_flush_all(struct protection_domain *domain)
CMD_INV_IOMMU_ALL_PAGES_ADDRESS);
}
void amd_iommu_dev_flush_pasid_pages(struct iommu_dev_data *dev_data,
ioasid_t pasid, u64 address, size_t size)
{
struct iommu_cmd cmd;
struct amd_iommu *iommu = get_amd_iommu_from_dev(dev_data->dev);
build_inv_iommu_pages(&cmd, address, size,
dev_data->domain->id, pasid, true);
iommu_queue_command(iommu, &cmd);
if (dev_data->ats_enabled)
device_flush_iotlb(dev_data, address, size, pasid, true);
iommu_completion_wait(iommu);
}
void amd_iommu_dev_flush_pasid_all(struct iommu_dev_data *dev_data,
ioasid_t pasid)
{
amd_iommu_dev_flush_pasid_pages(dev_data, 0,
CMD_INV_IOMMU_ALL_PAGES_ADDRESS, pasid);
}
void amd_iommu_domain_flush_complete(struct protection_domain *domain)
{
int i;