[Xen-changelog] [xen stable-4.5] x86/apic: Disable the LAPIC later in smp_send_stop()

[patchbot@xxxxxxx]

commit 8791a307be2f312b9c41eab1e68c7e79e266b922
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Thu Jun 18 08:51:00 2015 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Jun 18 08:51:00 2015 +0200

    x86/apic: Disable the LAPIC later in smp_send_stop()
    
    __stop_this_cpu() may reset the LAPIC mode back from x2apic to xapic, but 
will
    leave x2apic_enabled alone.  This may cause disconnect_bsp_APIC() in
    disable_IO_APIC() to suffer a #GP fault.
    
    Disabling the LAPIC can safely be deferred to being the last action.
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    master commit: d639bdd9bbed8d003ad9be0b13535aca636b9d18
    master date: 2015-06-03 09:25:43 +0200
---
 xen/arch/x86/smp.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/xen/arch/x86/smp.c b/xen/arch/x86/smp.c
index 06a833e..8caa0bc 100644
--- a/xen/arch/x86/smp.c
+++ b/xen/arch/x86/smp.c
@@ -311,9 +311,9 @@ void smp_send_stop(void)
         mdelay(1);
 
     local_irq_disable();
-    __stop_this_cpu();
     disable_IO_APIC();
     hpet_disable();
+    __stop_this_cpu();
     local_irq_enable();
 }
 
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.5

_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxx
http://lists.xensource.com/xen-changelog