[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v1] Fix p2m_set_suppress_ve
On a new altp2m view the p2m_set_suppress_ve() func will fail with invalid mfn from p2m->get_entry() if the p2m->set_entry() was not called before. This patch solves the problem by getting the mfn from __get_gfn_type_access() and then returning error if the mfn is invalid. Signed-off-by: Alexandru Isaila <aisaila@xxxxxxxxxxxxxxx> --- xen/arch/x86/mm/p2m.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/xen/arch/x86/mm/p2m.c b/xen/arch/x86/mm/p2m.c index b9bbb8f485..3e6e5ef152 100644 --- a/xen/arch/x86/mm/p2m.c +++ b/xen/arch/x86/mm/p2m.c @@ -3011,8 +3011,16 @@ int p2m_set_suppress_ve(struct domain *d, gfn_t gfn, bool suppress_ve, mfn = p2m->get_entry(p2m, gfn, &t, &a, 0, NULL, NULL); if ( !mfn_valid(mfn) ) { - rc = -ESRCH; - goto out; + unsigned int page_order; + + mfn = __get_gfn_type_access(host_p2m, gfn_x(gfn), &t, &a, + P2M_ALLOC | P2M_UNSHARE, &page_order, 0); + + if ( !mfn_valid(mfn) ) + { + rc = -ESRCH; + goto out; + } } rc = p2m->set_entry(p2m, gfn, mfn, PAGE_ORDER_4K, t, a, suppress_ve); -- 2.17.1 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |