[Xen-changelog] [xen master] tests/xen-access: disable CR4 write events on application exit

[patchbot@xxxxxxx]

commit d87cfb59b42832920f4cf3392dccfa5b8736b699
Author:     Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>
AuthorDate: Mon Jan 29 23:48:24 2018 +0200
Commit:     Wei Liu <wei.liu2@xxxxxxxxxx>
CommitDate: Tue Feb 6 16:45:40 2018 +0000

    tests/xen-access: disable CR4 write events on application exit
    
    On exit, xen-access did not unsubscribe from CR4 write vm_events,
    potentially leaving the guest stuck.
    
    Signed-off-by: Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>
    Acked-by: Tamas K Lengyel <tamas@xxxxxxxxxxxxx>
---
 tools/tests/xen-access/xen-access.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/tests/xen-access/xen-access.c 
b/tools/tests/xen-access/xen-access.c
index 9d960e2..a081168 100644
--- a/tools/tests/xen-access/xen-access.c
+++ b/tools/tests/xen-access/xen-access.c
@@ -654,6 +654,8 @@ int main(int argc, char *argv[])
                 rc = xc_monitor_cpuid(xch, domain_id, 0);
             if ( desc_access )
                 rc = xc_monitor_descriptor_access(xch, domain_id, 0);
+            if ( write_ctrlreg_cr4 )
+                rc = xc_monitor_write_ctrlreg(xch, domain_id, 
VM_EVENT_X86_CR4, 0, 0, 0, 0);
 
             if ( privcall )
                 rc = xc_monitor_privileged_call(xch, domain_id, 0);
--
generated by git-patchbot for /home/xen/git/xen.git#master

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