[Xen-devel] [PATCH v4 4/6] arm: implement flush_tlb_all_local and flush_tlb_local

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

Call flush_tlb_all_local from create_p2m_entries after removing a page
from the p2m.

Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
---
 xen/arch/arm/p2m.c             |    2 ++
 xen/include/asm-arm/flushtlb.h |   23 +++++++++++++++++++++--
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index 4c94ef0..051a0e8 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -3,6 +3,7 @@
 #include <xen/lib.h>
 #include <xen/errno.h>
 #include <xen/domain_page.h>
+#include <asm/flushtlb.h>
 
 void p2m_load_VTTBR(struct domain *d)
 {
@@ -123,6 +124,7 @@ static int create_p2m_entries(struct domain *d,
             /* p2m entry already present */
             free_domheap_page(
                     mfn_to_page(third[third_table_offset(addr)].p2m.base));
+            flush_tlb_all_local();
         }
 
         /* Allocate a new RAM page and attach */
diff --git a/xen/include/asm-arm/flushtlb.h b/xen/include/asm-arm/flushtlb.h
index c8486fc..210abfa 100644
--- a/xen/include/asm-arm/flushtlb.h
+++ b/xen/include/asm-arm/flushtlb.h
@@ -14,8 +14,27 @@ do {                                                         
           \
 
 #define tlbflush_current_time()                 (0)
 
-/* Flush local TLBs */
-void flush_tlb_local(void);
+/* Flush local TLBs, current VMID only */
+static inline void flush_tlb_local(void)
+{
+    dsb();
+
+    WRITE_CP32((uint32_t) 0, TLBIALLIS);
+
+    dsb();
+    isb();
+}
+
+/* Flush local TLBs, all VMIDs, non-hypervisor mode */
+static inline void flush_tlb_all_local(void)
+{
+    dsb();
+
+    WRITE_CP32((uint32_t) 0, TLBIALLNSNHIS);
+
+    dsb();
+    isb();
+}
 
 /* Flush specified CPUs' TLBs */
 void flush_tlb_mask(const cpumask_t *mask);
-- 
1.7.2.5


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