This is a note to let you know that I've just added the patch titled

xen: Fix {set,clear}_foreign_p2m_mapping on autotranslating guests

to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: xen-fix-set-clear-_foreign_p2m_mapping-on-autotranslating-guests.patch and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From 781198f1f373c3e350dbeb3af04a7d4c81c1b8d7 Mon Sep 17 00:00:00 2001

From: Simon Gaiser simon@invisiblethingslab.com Date: Wed, 7 Feb 2018 21:47:40 +0100 Subject: xen: Fix {set,clear}_foreign_p2m_mapping on autotranslating guests

From: Simon Gaiser simon@invisiblethingslab.com

commit 781198f1f373c3e350dbeb3af04a7d4c81c1b8d7 upstream.

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@vger.kernel.org # 4.14 Fixes: 82616f9599a7 ("xen: remove tests for pvh mode in pure pv paths") Signed-off-by: Simon Gaiser simon@invisiblethingslab.com Reviewed-by: Juergen Gross jgross@suse.com Signed-off-by: Juergen Gross jgross@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/xen/p2m.c | 6 ++++++ 1 file changed, 6 insertions(+)

--- a/arch/x86/xen/p2m.c +++ b/arch/x86/xen/p2m.c @@ -694,6 +694,9 @@ int set_foreign_p2m_mapping(struct gntta 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 gnt { 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]);

Patches currently in stable-queue which might be from simon@invisiblethingslab.com are

queue-4.15/xen-fix-set-clear-_foreign_p2m_mapping-on-autotranslating-guests.patch