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authorBoris Ostrovsky <boris.ostrovsky@oracle.com>2017-08-23 18:27:04 -0400
committerBoris Ostrovsky <boris.ostrovsky@oracle.com>2017-08-31 09:45:55 -0400
commitb194da25ca4812f6307204f9166ec623fd08d5d0 (patch)
tree535a0e43da6121afa300bd817f8104b64e384521 /drivers/xen
parent22f12f0df802cea865672d8f39fbebdc03981050 (diff)
downloadlinux-b194da25ca4812f6307204f9166ec623fd08d5d0.tar.bz2
xen: Don't try to call xen_alloc_p2m_entry() on autotranslating guests
Commit aba831a69632 ("xen: remove tests for pvh mode in pure pv paths") removed XENFEAT_auto_translated_physmap test in xen_alloc_p2m_entry() since it is assumed that the routine is never called by non-PV guests. However, alloc_xenballooned_pages() may make this call on a PVH guest. Prevent this from happening by adding XENFEAT_auto_translated_physmap check there. Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Reviewed-by: Juergen Gross <jgross@suse.com> Fixes: aba831a69632 ("xen: remove tests for pvh mode in pure pv paths")
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/balloon.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index ab609255a0f3..f77e499afddd 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -664,9 +664,11 @@ int alloc_xenballooned_pages(int nr_pages, struct page **pages)
*/
BUILD_BUG_ON(XEN_PAGE_SIZE != PAGE_SIZE);
- ret = xen_alloc_p2m_entry(page_to_pfn(page));
- if (ret < 0)
- goto out_undo;
+ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
+ ret = xen_alloc_p2m_entry(page_to_pfn(page));
+ if (ret < 0)
+ goto out_undo;
+ }
#endif
} else {
ret = add_ballooned_pages(nr_pages - pgno);