svn commit: r334147 - head/sys/x86/xen

[Roger Pau Monné]

Author: royger
Date: Thu May 24 10:22:57 2018
New Revision: 334147
URL: https://svnweb.freebsd.org/changeset/base/334147

Log:
  xen/pvh: allocate dbg_stack
  
  Or else init_secondary will hit a page fault (or write garbage
  somewhere).
  
  Sponsored by:	Citrix Systems R&D

Modified:
  head/sys/x86/xen/pv.c

Modified: head/sys/x86/xen/pv.c
==============================================================================
--- head/sys/x86/xen/pv.c	Thu May 24 10:20:42 2018	(r334146)
+++ head/sys/x86/xen/pv.c	Thu May 24 10:22:57 2018	(r334147)
@@ -101,6 +101,7 @@ static int xen_pv_start_all_aps(void);
 extern char *doublefault_stack;
 extern char *mce_stack;
 extern char *nmi_stack;
+extern char *dbg_stack;
 #endif
 
 /*
@@ -224,6 +225,8 @@ start_xen_ap(int cpu)
 	    (char *)kmem_malloc(kernel_arena, PAGE_SIZE, M_WAITOK | M_ZERO);
 	nmi_stack =
 	    (char *)kmem_malloc(kernel_arena, PAGE_SIZE, M_WAITOK | M_ZERO);
+	dbg_stack =
+	    (void *)kmem_malloc(kernel_arena, PAGE_SIZE, M_WAITOK | M_ZERO);
 	dpcpu =
 	    (void *)kmem_malloc(kernel_arena, DPCPU_SIZE, M_WAITOK | M_ZERO);