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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen stable-4.9] vtd: prune (and rename) cache flush functions
commit 7338b3371c0535944346fb3336a5e28b5c080658
Author: Roger Pau Monné <roger.pau@xxxxxxxxxx>
AuthorDate: Tue Jul 7 15:41:18 2020 +0200
Commit: Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Jul 7 15:41:18 2020 +0200
vtd: prune (and rename) cache flush functions
Rename __iommu_flush_cache to iommu_sync_cache and remove
iommu_flush_cache_page. Also remove the iommu_flush_cache_entry
wrapper and just use iommu_sync_cache instead. Note the _entry suffix
was meaningless as the wrapper was already taking a size parameter in
bytes. While there also constify the addr parameter.
No functional change intended.
This is part of XSA-321.
Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
master commit: 62298825b9a44f45761acbd758138b5ba059ebd1
master date: 2020-07-07 14:38:13 +0200
---
xen/drivers/passthrough/vtd/extern.h | 3 +--
xen/drivers/passthrough/vtd/intremap.c | 6 +++---
xen/drivers/passthrough/vtd/iommu.c | 31 +++++++++++--------------------
3 files changed, 15 insertions(+), 25 deletions(-)
diff --git a/xen/drivers/passthrough/vtd/extern.h
b/xen/drivers/passthrough/vtd/extern.h
index d698b1d50a..87d5ed78a2 100644
--- a/xen/drivers/passthrough/vtd/extern.h
+++ b/xen/drivers/passthrough/vtd/extern.h
@@ -37,8 +37,7 @@ void disable_qinval(struct iommu *iommu);
int enable_intremap(struct iommu *iommu, int eim);
void disable_intremap(struct iommu *iommu);
-void iommu_flush_cache_entry(void *addr, unsigned int size);
-void iommu_flush_cache_page(void *addr, unsigned long npages);
+void iommu_sync_cache(const void *addr, unsigned int size);
int iommu_alloc(struct acpi_drhd_unit *drhd);
void iommu_free(struct acpi_drhd_unit *drhd);
diff --git a/xen/drivers/passthrough/vtd/intremap.c
b/xen/drivers/passthrough/vtd/intremap.c
index 1e0317c47a..1b741a2bdb 100644
--- a/xen/drivers/passthrough/vtd/intremap.c
+++ b/xen/drivers/passthrough/vtd/intremap.c
@@ -231,7 +231,7 @@ static void free_remap_entry(struct iommu *iommu, int index)
iremap_entries, iremap_entry);
update_irte(iommu, iremap_entry, &new_ire, false);
- iommu_flush_cache_entry(iremap_entry, sizeof(*iremap_entry));
+ iommu_sync_cache(iremap_entry, sizeof(*iremap_entry));
iommu_flush_iec_index(iommu, 0, index);
unmap_vtd_domain_page(iremap_entries);
@@ -403,7 +403,7 @@ static int ioapic_rte_to_remap_entry(struct iommu *iommu,
}
update_irte(iommu, iremap_entry, &new_ire, !init);
- iommu_flush_cache_entry(iremap_entry, sizeof(*iremap_entry));
+ iommu_sync_cache(iremap_entry, sizeof(*iremap_entry));
iommu_flush_iec_index(iommu, 0, index);
unmap_vtd_domain_page(iremap_entries);
@@ -694,7 +694,7 @@ static int msi_msg_to_remap_entry(
update_irte(iommu, iremap_entry, &new_ire, msi_desc->irte_initialized);
msi_desc->irte_initialized = true;
- iommu_flush_cache_entry(iremap_entry, sizeof(*iremap_entry));
+ iommu_sync_cache(iremap_entry, sizeof(*iremap_entry));
iommu_flush_iec_index(iommu, 0, index);
unmap_vtd_domain_page(iremap_entries);
diff --git a/xen/drivers/passthrough/vtd/iommu.c
b/xen/drivers/passthrough/vtd/iommu.c
index 2180f0e899..8ff1a4d8f7 100644
--- a/xen/drivers/passthrough/vtd/iommu.c
+++ b/xen/drivers/passthrough/vtd/iommu.c
@@ -158,7 +158,8 @@ static void __init free_intel_iommu(struct intel_iommu
*intel)
}
static int iommus_incoherent;
-static void __iommu_flush_cache(void *addr, unsigned int size)
+
+void iommu_sync_cache(const void *addr, unsigned int size)
{
int i;
static unsigned int clflush_size = 0;
@@ -173,16 +174,6 @@ static void __iommu_flush_cache(void *addr, unsigned int
size)
cacheline_flush((char *)addr + i);
}
-void iommu_flush_cache_entry(void *addr, unsigned int size)
-{
- __iommu_flush_cache(addr, size);
-}
-
-void iommu_flush_cache_page(void *addr, unsigned long npages)
-{
- __iommu_flush_cache(addr, PAGE_SIZE * npages);
-}
-
/* Allocate page table, return its machine address */
u64 alloc_pgtable_maddr(struct acpi_drhd_unit *drhd, unsigned long npages)
{
@@ -207,7 +198,7 @@ u64 alloc_pgtable_maddr(struct acpi_drhd_unit *drhd,
unsigned long npages)
vaddr = __map_domain_page(cur_pg);
memset(vaddr, 0, PAGE_SIZE);
- iommu_flush_cache_page(vaddr, 1);
+ iommu_sync_cache(vaddr, PAGE_SIZE);
unmap_domain_page(vaddr);
cur_pg++;
}
@@ -242,7 +233,7 @@ static u64 bus_to_context_maddr(struct iommu *iommu, u8 bus)
}
set_root_value(*root, maddr);
set_root_present(*root);
- iommu_flush_cache_entry(root, sizeof(struct root_entry));
+ iommu_sync_cache(root, sizeof(struct root_entry));
}
maddr = (u64) get_context_addr(*root);
unmap_vtd_domain_page(root_entries);
@@ -300,7 +291,7 @@ static u64 addr_to_dma_page_maddr(struct domain *domain,
u64 addr, int alloc)
*/
dma_set_pte_readable(*pte);
dma_set_pte_writable(*pte);
- iommu_flush_cache_entry(pte, sizeof(struct dma_pte));
+ iommu_sync_cache(pte, sizeof(struct dma_pte));
}
if ( level == 2 )
@@ -674,7 +665,7 @@ static int __must_check dma_pte_clear_one(struct domain
*domain, u64 addr)
dma_clear_pte(*pte);
spin_unlock(&hd->arch.mapping_lock);
- iommu_flush_cache_entry(pte, sizeof(struct dma_pte));
+ iommu_sync_cache(pte, sizeof(struct dma_pte));
if ( !this_cpu(iommu_dont_flush_iotlb) )
rc = iommu_flush_iotlb_pages(domain, addr >> PAGE_SHIFT_4K, 1);
@@ -716,7 +707,7 @@ static void iommu_free_page_table(struct page_info *pg)
iommu_free_pagetable(dma_pte_addr(*pte), next_level);
dma_clear_pte(*pte);
- iommu_flush_cache_entry(pte, sizeof(struct dma_pte));
+ iommu_sync_cache(pte, sizeof(struct dma_pte));
}
unmap_vtd_domain_page(pt_vaddr);
@@ -1447,7 +1438,7 @@ int domain_context_mapping_one(
context_set_address_width(*context, agaw);
context_set_fault_enable(*context);
context_set_present(*context);
- iommu_flush_cache_entry(context, sizeof(struct context_entry));
+ iommu_sync_cache(context, sizeof(struct context_entry));
spin_unlock(&iommu->lock);
/* Context entry was previously non-present (with domid 0). */
@@ -1594,7 +1585,7 @@ int domain_context_unmap_one(
context_clear_present(*context);
context_clear_entry(*context);
- iommu_flush_cache_entry(context, sizeof(struct context_entry));
+ iommu_sync_cache(context, sizeof(struct context_entry));
iommu_domid= domain_iommu_domid(domain, iommu);
if ( iommu_domid == -1 )
@@ -1824,7 +1815,7 @@ static int __must_check intel_iommu_map_page(struct
domain *d,
*pte = new;
- iommu_flush_cache_entry(pte, sizeof(struct dma_pte));
+ iommu_sync_cache(pte, sizeof(struct dma_pte));
spin_unlock(&hd->arch.mapping_lock);
unmap_vtd_domain_page(page);
@@ -1858,7 +1849,7 @@ int iommu_pte_flush(struct domain *d, u64 gfn, u64 *pte,
int iommu_domid;
int rc = 0;
- iommu_flush_cache_entry(pte, sizeof(struct dma_pte));
+ iommu_sync_cache(pte, sizeof(struct dma_pte));
for_each_drhd_unit ( drhd )
{
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.9
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