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Subject[PATCH 4/5] iommu/vt-d: Consolidate pasid-based tlb invalidation
Date
Merge pasid-based tlb invalidation into iommu->flush.p_iotlb_inv.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
drivers/iommu/intel-iommu.c | 43 +++++++++++++++++++++++++++++++++++++
drivers/iommu/intel-pasid.c | 18 ++--------------
drivers/iommu/intel-svm.c | 23 +++-----------------
3 files changed, 48 insertions(+), 36 deletions(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 4eeb18942d3c..fec78cc877c1 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -3032,6 +3032,48 @@ qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 pfsid,
qi_submit_sync(&desc, iommu);
}

+/* PASID-based IOTLB invalidation */
+static void
+qi_flush_piotlb(struct intel_iommu *iommu, u16 did, u32 pasid, u64 addr,
+ unsigned long npages, bool ih)
+{
+ struct qi_desc desc = {.qw2 = 0, .qw3 = 0};
+
+ /*
+ * npages == -1 means a PASID-selective invalidation, otherwise,
+ * a positive value for Page-selective-within-PASID invalidation.
+ * 0 is not a valid input.
+ */
+ if (WARN_ON(!npages)) {
+ pr_err("Invalid input npages = %ld\n", npages);
+ return;
+ }
+
+ if (npages == -1) {
+ desc.qw0 = QI_EIOTLB_PASID(pasid) |
+ QI_EIOTLB_DID(did) |
+ QI_EIOTLB_GRAN(QI_GRAN_NONG_PASID) |
+ QI_EIOTLB_TYPE;
+ desc.qw1 = 0;
+ } else {
+ int mask = ilog2(__roundup_pow_of_two(npages));
+ unsigned long align = (1ULL << (VTD_PAGE_SHIFT + mask));
+
+ if (WARN_ON_ONCE(!ALIGN(addr, align)))
+ addr &= ~(align - 1);
+
+ desc.qw0 = QI_EIOTLB_PASID(pasid) |
+ QI_EIOTLB_DID(did) |
+ QI_EIOTLB_GRAN(QI_GRAN_PSI_PASID) |
+ QI_EIOTLB_TYPE;
+ desc.qw1 = QI_EIOTLB_ADDR(addr) |
+ QI_EIOTLB_IH(ih) |
+ QI_EIOTLB_AM(mask);
+ }
+
+ qi_submit_sync(&desc, iommu);
+}
+
static void intel_iommu_init_qi(struct intel_iommu *iommu)
{
/*
@@ -3065,6 +3107,7 @@ static void intel_iommu_init_qi(struct intel_iommu *iommu)
iommu->flush.iotlb_inv = qi_flush_iotlb;
iommu->flush.pc_inv = qi_flush_pasid;
iommu->flush.dev_tlb_inv = qi_flush_dev_iotlb;
+ iommu->flush.p_iotlb_inv = qi_flush_piotlb;
pr_info("%s: Using Queued invalidation\n", iommu->name);
}
}
diff --git a/drivers/iommu/intel-pasid.c b/drivers/iommu/intel-pasid.c
index 01dd9c86178b..78ff4eee8595 100644
--- a/drivers/iommu/intel-pasid.c
+++ b/drivers/iommu/intel-pasid.c
@@ -359,20 +359,6 @@ pasid_set_flpm(struct pasid_entry *pe, u64 value)
pasid_set_bits(&pe->val[2], GENMASK_ULL(3, 2), value << 2);
}

-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(&desc, iommu);
-}
-
static void
devtlb_invalidation_with_pasid(struct intel_iommu *iommu,
struct device *dev, int pasid)
@@ -409,7 +395,7 @@ void intel_pasid_tear_down_entry(struct intel_iommu *iommu,
clflush_cache_range(pte, sizeof(*pte));

iommu->flush.pc_inv(iommu, did, pasid, QI_PC_GRAN_PSWD);
- iotlb_invalidation_with_pasid(iommu, did, pasid);
+ iommu->flush.p_iotlb_inv(iommu, did, pasid, 0, -1, 0);

/* Device IOTLB doesn't need to be flushed in caching mode. */
if (!cap_caching_mode(iommu->cap))
@@ -425,7 +411,7 @@ static void pasid_flush_caches(struct intel_iommu *iommu,

if (cap_caching_mode(iommu->cap)) {
iommu->flush.pc_inv(iommu, did, pasid, QI_PC_GRAN_PSWD);
- iotlb_invalidation_with_pasid(iommu, did, pasid);
+ iommu->flush.p_iotlb_inv(iommu, did, pasid, 0, -1, 0);
} else {
iommu_flush_write_buffer(iommu);
}
diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
index f5594b9981a5..02c6b14f0568 100644
--- a/drivers/iommu/intel-svm.c
+++ b/drivers/iommu/intel-svm.c
@@ -118,27 +118,10 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
unsigned long address, unsigned long pages, int ih)
{
struct qi_desc desc;
+ struct intel_iommu *iommu = svm->iommu;

- 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));
-
- 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(&desc, svm->iommu);
+ iommu->flush.p_iotlb_inv(iommu, sdev->did,
+ svm->pasid, address, pages, ih);

if (sdev->dev_iotlb) {
desc.qw0 = QI_DEV_EIOTLB_PASID(svm->pasid) |
--
2.17.1
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