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[Xen-devel,for-4.12,v2,10/17] xen/arm: p2m: Allow to flush cache on any RAM region

Message ID 20181204202651.8836-11-julien.grall@arm.com
State New
Headers show
Series xen/arm: Implement Set/Way operations | expand

Commit Message

Julien Grall Dec. 4, 2018, 8:26 p.m. UTC 
Currently, we only allow to flush cache on regions mapped as p2m_ram_{rw,ro}.

There are no real problem in cache flushing any RAM regions such as grants
and foreign mapping. Therefore, relax the check to allow flushing the
cache on any RAM region.

Signed-off-by: Julien Grall <julien.grall@arm.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>

---
    Changes in v2:
        - Fix typoes
        - Add Stefano's reviewed-by
---
 xen/arch/arm/p2m.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index 836157292c..4e0ddbf70b 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -1539,7 +1539,7 @@  int p2m_cache_flush_range(struct domain *d, gfn_t start, gfn_t end)
         next_gfn = gfn_next_boundary(start, order);
 
         /* Skip hole and non-RAM page */
-        if ( mfn_eq(mfn, INVALID_MFN) || !p2m_is_ram(t) )
+        if ( mfn_eq(mfn, INVALID_MFN) || !p2m_is_any_ram(t) )
             continue;
 
         /* XXX: Implement preemption */