leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

iommu/vt-d: Consolidate duplicate cache invaliation code

Browse Source 
The pasid based IOTLB and devTLB invalidation code is duplicate in
several places. Consolidate them by using the common helpers.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20210114085021.717041-1-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Lu Baolu 2021-01-14 16:50:21 +08:00 committed by Joerg Roedel
parent 6ee1d745b7
commit 9872f9bd9d
2 changed files with 10 additions and 61 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/iommu/intel/pasid.c
View File

@ -456,20 +456,6 @@ pasid_cache_invalidation_with_pasid(struct intel_iommu *iommu,
qi_submit_sync(iommu, &desc, 1, 0);
}
static void
iotlb_invalidation_with_pasid(struct intel_iommu *iommu, u16 did, u32 pasid)
{
struct qi_desc desc;
desc.qw0 = QI_EIOTLB_PASID(pasid) | QI_EIOTLB_DID(did) |
QI_EIOTLB_GRAN(QI_GRAN_NONG_PASID) | QI_EIOTLB_TYPE;
desc.qw1 = 0;
desc.qw2 = 0;
desc.qw3 = 0;
qi_submit_sync(iommu, &desc, 1, 0);
}
static void
devtlb_invalidation_with_pasid(struct intel_iommu *iommu,
struct device *dev, u32 pasid)
@ -514,7 +500,7 @@ void intel_pasid_tear_down_entry(struct intel_iommu *iommu, struct device *dev,
clflush_cache_range(pte, sizeof(*pte));
pasid_cache_invalidation_with_pasid(iommu, did, pasid);
iotlb_invalidation_with_pasid(iommu, did, pasid);
qi_flush_piotlb(iommu, did, pasid, 0, -1, 0);
/* Device IOTLB doesn't need to be flushed in caching mode. */
if (!cap_caching_mode(iommu->cap))
@ -530,7 +516,7 @@ static void pasid_flush_caches(struct intel_iommu *iommu,
if (cap_caching_mode(iommu->cap)) {
pasid_cache_invalidation_with_pasid(iommu, did, pasid);
iotlb_invalidation_with_pasid(iommu, did, pasid);
qi_flush_piotlb(iommu, did, pasid, 0, -1, 0);
} else {
iommu_flush_write_buffer(iommu);
}

53
drivers/iommu/intel/svm.c
View File

@ -123,53 +123,16 @@ static void __flush_svm_range_dev(struct intel_svm *svm,
unsigned long address,
unsigned long pages, int ih)
{
struct qi_desc desc;
struct device_domain_info *info = get_domain_info(sdev->dev);
if (pages == -1) {
desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
QI_EIOTLB_DID(sdev->did) |
QI_EIOTLB_GRAN(QI_GRAN_NONG_PASID) |
QI_EIOTLB_TYPE;
desc.qw1 = 0;
} else {
int mask = ilog2(__roundup_pow_of_two(pages));
if (WARN_ON(!pages))
return;
desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
QI_EIOTLB_DID(sdev->did) |
QI_EIOTLB_GRAN(QI_GRAN_PSI_PASID) |
QI_EIOTLB_TYPE;
desc.qw1 = QI_EIOTLB_ADDR(address) |
QI_EIOTLB_IH(ih) |
QI_EIOTLB_AM(mask);
}
desc.qw2 = 0;
desc.qw3 = 0;
qi_submit_sync(sdev->iommu, &desc, 1, 0);
if (sdev->dev_iotlb) {
desc.qw0 = QI_DEV_EIOTLB_PASID(svm->pasid) |
QI_DEV_EIOTLB_SID(sdev->sid) |
QI_DEV_EIOTLB_QDEP(sdev->qdep) |
QI_DEIOTLB_TYPE;
if (pages == -1) {
desc.qw1 = QI_DEV_EIOTLB_ADDR(-1ULL >> 1) |
QI_DEV_EIOTLB_SIZE;
} else if (pages > 1) {
/* The least significant zero bit indicates the size. So,
* for example, an "address" value of 0x12345f000 will
* flush from 0x123440000 to 0x12347ffff (256KiB). */
unsigned long last = address + ((unsigned long)(pages - 1) << VTD_PAGE_SHIFT);
unsigned long mask = __rounddown_pow_of_two(address ^ last);
desc.qw1 = QI_DEV_EIOTLB_ADDR((address & ~mask) |
(mask - 1)) | QI_DEV_EIOTLB_SIZE;
} else {
desc.qw1 = QI_DEV_EIOTLB_ADDR(address);
}
desc.qw2 = 0;
desc.qw3 = 0;
qi_submit_sync(sdev->iommu, &desc, 1, 0);
}
qi_flush_piotlb(sdev->iommu, sdev->did, svm->pasid, address, pages, ih);
if (info->ats_enabled)
qi_flush_dev_iotlb_pasid(sdev->iommu, sdev->sid, info->pfsid,
svm->pasid, sdev->qdep, address,
order_base_2(pages));
}
static void intel_flush_svm_range_dev(struct intel_svm *svm,