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KVM: s390: Do not set special large pages dirty

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Special pages / folios should not be set dirty. This also applies to
large pages.

Add a missing check in gmap_clear_young_crste() to prevent setting the
large page dirty if it is a special page.

Fixes: a2c17f9270 ("KVM: s390: New gmap code")
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Message-ID: <20260623153331.233784-4-imbrenda@linux.ibm.com>
This commit is contained in:
Claudio Imbrenda 2026-06-23 17:33:24 +02:00
parent 7a386efcb2
commit e6c9b322c8
1 changed files with 1 additions and 1 deletions
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arch/s390/kvm/gmap.c
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@ -327,7 +327,7 @@ static long gmap_clear_young_crste(union crste *crstep, gfn_t gfn, gfn_t end, st
new.h.i = 1;
new.s.fc1.y = 0;
new.s.fc1.prefix_notif = 0;
if (new.s.fc1.d || !new.h.p)
if ((new.s.fc1.d || !new.h.p) && !new.s.fc1.s)
folio_set_dirty(phys_to_folio(crste_origin_large(crste)));
new.s.fc1.d = 0;
new.h.p = 1;