x86/hvm: print register state upon triple fault

A sample looks like:

(XEN) d1v0 Triple fault - invoking HVM shutdown action 1
(XEN) *** Dumping Dom1 vcpu#0 state: ***
(XEN) ----[ Xen-4.7-unstable  x86_64  debug=y  Not tainted ]----
(XEN) CPU:    2
(XEN) RIP:    0000:[<0000000000100005>]
(XEN) RFLAGS: 0000000000010002   CONTEXT: hvm guest (d1v0)
(XEN) rax: 0000000000000020   rbx: 0000000000000000   rcx: 0000000000000000
(XEN) rdx: 0000000000000000   rsi: 0000000000000000   rdi: 0000000000000000
(XEN) rbp: 0000000000000000   rsp: 0000000000000000   r8:  0000000000000000
(XEN) r9:  0000000000000000   r10: 0000000000000000   r11: 0000000000000000
(XEN) r12: 0000000000000000   r13: 0000000000000000   r14: 0000000000000000
(XEN) r15: 0000000000000000   cr0: 0000000000000011   cr4: 0000000000000000
(XEN) cr3: 0000000000000000   cr2: 0000000000000000
(XEN) ds: 0000   es: 0000   fs: 0000   gs: 0000   ss: 0000   cs: 0000

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
master commit: 1329105943179b91da2466431cc972e223900ced
master date: 2016-02-25 13:02:29 +0100

diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 41fb10a44b225e0ea319e138f461e2490b8a276f..ac3fa3123c931cc5b387f1132dea04455b0ceca8 100644 (file)
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -2683,6 +2683,7 @@ void hvm_triple_fault(void)
     gdprintk(XENLOG_INFO, "Triple fault on VCPU%d - "
              "invoking HVM shutdown action %"PRIu8".\n",
              v->vcpu_id, reason);
+    vcpu_show_execution_state(v);
     domain_shutdown(d, reason);
 }