[Xen-changelog] [xen stable-4.2] x86/mem_event: fix regression affecting CR0 memory events

[patchbot@xxxxxxx]

commit 48b7f833834644d0f6a08c9234393ed06ddddb1f
Author:     Tamas K Lengyel <tamas.lengyel@xxxxxxxxxxxx>
AuthorDate: Mon Jul 28 15:14:43 2014 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Mon Jul 28 15:14:43 2014 +0200

    x86/mem_event: fix regression affecting CR0 memory events
    
    This is a patch repairing a regression in code previously functional in 
4.1.x.
    It appears that, during some refactoring work, call to hvm_memory_event_cr0 
was lost.
    
    This function was originally called in mov_to_cr() of vmx.c, but the commit
    http://xenbits.xen.org/hg/xen-unstable.hg/rev/1276926e3795 abstracted the
    original code into generic functions up a level in hvm.c, dropping the call
    in the process.
    
    The same issue affected the CR3 and CR4 events, which were fixed in patch
    http://xenbits.xensource.com/hg/xen-unstable.hg/rev/7ab899e46347.
    
    Signed-off-by: Tamas K Lengyel <tamas.lengyel@xxxxxxxxxxxx>
    Reviewed-by: Tim Deegan <tim@xxxxxxx>
    master commit: 5d570c1d0274cac3b333ef378af3325b3b69905e
    master date: 2014-07-23 18:05:11 +0200
---
 xen/arch/x86/hvm/hvm.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 7d4b0b3..8959a54 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -1788,6 +1788,7 @@ int hvm_set_cr0(unsigned long value)
 
     v->arch.hvm_vcpu.guest_cr[0] = value;
     hvm_update_guest_cr(v, 0);
+    hvm_memory_event_cr0(value, old_value);
 
     if ( (value ^ old_value) & X86_CR0_PG ) {
         if ( !nestedhvm_vmswitch_in_progress(v) && 
nestedhvm_vcpu_in_guestmode(v) )
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.2

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