[Xen-devel] [PATCH] xen: Fix {set, clear}_foreign_p2m_mapping on autotranslating guests

[Simon Gaiser <simon@xxxxxxxxxxxxxxxxxxxxxx>]

Commit 82616f9599a7 ("xen: remove tests for pvh mode in pure pv paths")
removed the check for autotranslation from {set,clear}_foreign_p2m_mapping
but those are called by grant-table.c also on PVH/HVM guests.

Cc: <stable@xxxxxxxxxxxxxxx> # 4.14
Fixes: 82616f9599a7 ("xen: remove tests for pvh mode in pure pv paths")
Signed-off-by: Simon Gaiser <simon@xxxxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Juergen Gross <jgross@xxxxxxxx>
---
 arch/x86/xen/p2m.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c
index 13b4f19b9131..159a897151d6 100644
--- a/arch/x86/xen/p2m.c
+++ b/arch/x86/xen/p2m.c
@@ -694,6 +694,9 @@ int set_foreign_p2m_mapping(struct gnttab_map_grant_ref 
*map_ops,
        int i, ret = 0;
        pte_t *pte;
 
+       if (xen_feature(XENFEAT_auto_translated_physmap))
+               return 0;
+
        if (kmap_ops) {
                ret = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref,
                                                kmap_ops, count);
@@ -736,6 +739,9 @@ int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref 
*unmap_ops,
 {
        int i, ret = 0;
 
+       if (xen_feature(XENFEAT_auto_translated_physmap))
+               return 0;
+
        for (i = 0; i < count; i++) {
                unsigned long mfn = __pfn_to_mfn(page_to_pfn(pages[i]));
                unsigned long pfn = page_to_pfn(pages[i]);
-- 
2.15.1


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel