[Xen-changelog] [xen stable-4.11] x86/mtrr: recalculate P2M type for domains with iocaps

[patchbot@xxxxxxx]

commit ec821f1242d2e6eef25e81fc49ebd8fbe9118a92
Author:     Igor Druzhinin <igor.druzhinin@xxxxxxxxxx>
AuthorDate: Thu Jun 6 14:07:06 2019 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Jun 6 14:07:06 2019 +0200

    x86/mtrr: recalculate P2M type for domains with iocaps
    
    This change reflects the logic in epte_get_entry_emt() and allows
    changes in guest MTTRs to be reflected in EPT for domains having
    direct access to certain hardware memory regions but without IOMMU
    context assigned (e.g. XenGT).
    
    Signed-off-by: Igor Druzhinin <igor.druzhinin@xxxxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
    master commit: f3d880bf2be92534c5bacf11de2f561cbad550fb
    master date: 2019-05-13 09:54:45 +0200
---
 xen/arch/x86/hvm/mtrr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/hvm/mtrr.c b/xen/arch/x86/hvm/mtrr.c
index a61cc1e6dc..fa9e27b3b7 100644
--- a/xen/arch/x86/hvm/mtrr.c
+++ b/xen/arch/x86/hvm/mtrr.c
@@ -755,7 +755,7 @@ HVM_REGISTER_SAVE_RESTORE(MTRR, hvm_save_mtrr_msr, 
hvm_load_mtrr_msr,
 
 void memory_type_changed(struct domain *d)
 {
-    if ( need_iommu(d) && d->vcpu && d->vcpu[0] )
+    if ( (need_iommu(d) || cache_flush_permitted(d)) && d->vcpu && d->vcpu[0] )
     {
         p2m_memory_type_changed(d);
         flush_all(FLUSH_CACHE);
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.11

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