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stable-4.1
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@ -1,40 +0,0 @@
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From c71b9388cef5106ad8aa4f8db3d03388e74e5b89 Mon Sep 17 00:00:00 2001
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From: Simon Gaiser <simon@invisiblethingslab.com>
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Date: Fri, 5 Jan 2018 18:28:39 +0100
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Subject: [PATCH] xen: Fix {set,clear}_foreign_p2m_mapping on autotranslating
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guests
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Commit 82616f9599a7 ("xen: remove tests for pvh mode in pure pv paths")
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removed the check for autotranslation from {set,clear}_foreign_p2m_mapping
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but those are called by grant-table.c also on PVH/HVM guests.
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---
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arch/x86/xen/p2m.c | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c
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index 6083ba462f35..15812e553b95 100644
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--- a/arch/x86/xen/p2m.c
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+++ b/arch/x86/xen/p2m.c
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@@ -694,6 +694,9 @@ int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops,
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int i, ret = 0;
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pte_t *pte;
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+ if (xen_feature(XENFEAT_auto_translated_physmap))
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+ return 0;
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+
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if (kmap_ops) {
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ret = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref,
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kmap_ops, count);
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@@ -736,6 +739,9 @@ int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops,
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{
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int i, ret = 0;
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+ if (xen_feature(XENFEAT_auto_translated_physmap))
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+ return 0;
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+
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for (i = 0; i < count; i++) {
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unsigned long mfn = __pfn_to_mfn(page_to_pfn(pages[i]));
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unsigned long pfn = page_to_pfn(pages[i]);
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--
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2.15.1
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