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| author | Boris Ostrovsky | 2017-08-24 00:27:04 +0200 |
|---|---|---|
| committer | Boris Ostrovsky | 2017-08-31 15:45:55 +0200 |
| commit | b194da25ca4812f6307204f9166ec623fd08d5d0 (patch) | |
| tree | 535a0e43da6121afa300bd817f8104b64e384521 | |
| parent | xen/events: events_fifo: Don't use {get,put}_cpu() in xen_evtchn_fifo_init() (diff) | |
| download | kernel-qcow2-linux-b194da25ca4812f6307204f9166ec623fd08d5d0.tar.gz kernel-qcow2-linux-b194da25ca4812f6307204f9166ec623fd08d5d0.tar.xz kernel-qcow2-linux-b194da25ca4812f6307204f9166ec623fd08d5d0.zip | |
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")
| -rw-r--r-- | drivers/xen/balloon.c | 8 |
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); |