[PATCH v2 3/4] VT-d: replace flush_all_cache()

[Jan Beulich]

Let's use infrastructure we have available instead of an open-coded
wbinvd() invocation.

Signed-off-by: Jan Beulich <jbeul...@suse.com>

--- a/xen/drivers/passthrough/vtd/extern.h
+++ b/xen/drivers/passthrough/vtd/extern.h
@@ -78,8 +78,6 @@ int __must_check qinval_device_iotlb_syn
                                           struct pci_dev *pdev,
                                           u16 did, u16 size, u64 addr);
 
-void flush_all_cache(void);
-
 uint64_t alloc_pgtable_maddr(unsigned long npages, nodeid_t node);
 void free_pgtable_maddr(u64 maddr);
 void *map_vtd_domain_page(u64 maddr);
--- a/xen/drivers/passthrough/vtd/iommu.c
+++ b/xen/drivers/passthrough/vtd/iommu.c
@@ -623,7 +623,8 @@ static int __must_check iommu_flush_all(
     bool_t flush_dev_iotlb;
     int rc = 0;
 
-    flush_all_cache();
+    flush_local(FLUSH_CACHE);
+
     for_each_drhd_unit ( drhd )
     {
         int context_rc, iotlb_rc;
--- a/xen/drivers/passthrough/vtd/x86/vtd.c
+++ b/xen/drivers/passthrough/vtd/x86/vtd.c
@@ -46,8 +46,3 @@ void unmap_vtd_domain_page(const void *v
 {
     unmap_domain_page(va);
 }
-
-void flush_all_cache()
-{
-    wbinvd();
-}