[Xen-changelog] [xen master] xen/arm64: Add missing synchronization barrier in invalidate_cache

[patchbot@xxxxxxx]

commit fc34707ae1fb8801e18421645e87017f6fd9cbfe
Author:     Julien Grall <julien.grall@xxxxxxx>
AuthorDate: Wed Sep 21 15:52:12 2016 +0100
Commit:     Stefano Stabellini <sstabellini@xxxxxxxxxx>
CommitDate: Wed Sep 21 11:21:23 2016 -0700

    xen/arm64: Add missing synchronization barrier in invalidate_cache
    
    The invalidation of the instructions cache requires barriers to ensure
    the completion of the invalidation before continuing (see B2.3.4 in ARM
    DDI 0487A.j).
    
    This was overlooked in commit fb9d877 "xen/arm64: Add an helper to
    invalidate all instruction caches".
    
    Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
    Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
    Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
 xen/include/asm-arm/arm64/page.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/xen/include/asm-arm/arm64/page.h b/xen/include/asm-arm/arm64/page.h
index 79ef7bd..23d7781 100644
--- a/xen/include/asm-arm/arm64/page.h
+++ b/xen/include/asm-arm/arm64/page.h
@@ -33,6 +33,8 @@ static inline void write_pte(lpae_t *p, lpae_t pte)
 static inline void invalidate_icache(void)
 {
     asm volatile ("ic ialluis");
+    dsb(ish);               /* Ensure completion of the flush I-cache */
+    isb();
 }
 
 /*
--
generated by git-patchbot for /home/xen/git/xen.git#master

_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxx
https://lists.xenproject.org/xen-changelog