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iommu/amd: Remove the confusing dummy iommu_flush_ops tlb ops

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The iommu driver is supposed to provide these ops to its io_pgtable
implementation so that it can hook the invalidations and do the right
thing.

They are called by wrapper functions like io_pgtable_tlb_add_page() etc,
which the AMD code never calls.

Instead it directly calls the AMD IOMMU invalidation functions by casting
to the struct protection_domain. Remove it all.

Reviewed-by: Vasant Hegde <vasant.hegde@amd.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/12-v2-831cdc4d00f3+1a315-amd_iopgtbl_jgg@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Jason Gunthorpe 2024-08-29 21:06:21 -03:00 committed by Joerg Roedel
parent a06dcb6b78
commit c435209f72
2 changed files with 0 additions and 44 deletions
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22
drivers/iommu/amd/io_pgtable.c
View File

@ -24,27 +24,6 @@
#include "amd_iommu.h"
#include "../iommu-pages.h"
static void v1_tlb_flush_all(void *cookie)
{
}
static void v1_tlb_flush_walk(unsigned long iova, size_t size,
size_t granule, void *cookie)
{
}
static void v1_tlb_add_page(struct iommu_iotlb_gather *gather,
unsigned long iova, size_t granule,
void *cookie)
{
}
static const struct iommu_flush_ops v1_flush_ops = {
.tlb_flush_all = v1_tlb_flush_all,
.tlb_flush_walk = v1_tlb_flush_walk,
.tlb_add_page = v1_tlb_add_page,
};
/*
* Helper function to get the first pte of a large mapping
*/
@ -572,7 +551,6 @@ static struct io_pgtable *v1_alloc_pgtable(struct io_pgtable_cfg *cfg, void *coo
cfg->pgsize_bitmap = AMD_IOMMU_PGSIZES;
cfg->ias = IOMMU_IN_ADDR_BIT_SIZE;
cfg->oas = IOMMU_OUT_ADDR_BIT_SIZE;
cfg->tlb = &v1_flush_ops;
pgtable->pgtbl.ops.map_pages = iommu_v1_map_pages;
pgtable->pgtbl.ops.unmap_pages = iommu_v1_unmap_pages;

22
drivers/iommu/amd/io_pgtable_v2.c
View File

@ -326,27 +326,6 @@ static phys_addr_t iommu_v2_iova_to_phys(struct io_pgtable_ops *ops, unsigned lo
/*
* ----------------------------------------------------
*/
static void v2_tlb_flush_all(void *cookie)
{
}
static void v2_tlb_flush_walk(unsigned long iova, size_t size,
size_t granule, void *cookie)
{
}
static void v2_tlb_add_page(struct iommu_iotlb_gather *gather,
unsigned long iova, size_t granule,
void *cookie)
{
}
static const struct iommu_flush_ops v2_flush_ops = {
.tlb_flush_all = v2_tlb_flush_all,
.tlb_flush_walk = v2_tlb_flush_walk,
.tlb_add_page = v2_tlb_add_page,
};
static void v2_free_pgtable(struct io_pgtable *iop)
{
struct amd_io_pgtable *pgtable = container_of(iop, struct amd_io_pgtable, pgtbl);
@ -378,7 +357,6 @@ static struct io_pgtable *v2_alloc_pgtable(struct io_pgtable_cfg *cfg, void *coo
cfg->pgsize_bitmap = AMD_IOMMU_PGSIZES_V2;
cfg->ias = ias;
cfg->oas = IOMMU_OUT_ADDR_BIT_SIZE;
cfg->tlb = &v2_flush_ops;
return &pgtable->pgtbl;
}