[PATCH 18/21] arm: implement VGCF_online

[Ian Campbell <ian.campbell@citrix.com>]

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Tim Deegan <tim@xen.org>
---
 tools/libxc/xc_dom_arm.c      |    2 ++
 xen/arch/arm/domain.c         |    5 ++++-
 xen/include/public/arch-arm.h |    4 ++++
 3 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/tools/libxc/xc_dom_arm.c b/tools/libxc/xc_dom_arm.c
index 9099cad..bea409b 100644
--- a/tools/libxc/xc_dom_arm.c
+++ b/tools/libxc/xc_dom_arm.c
@@ -96,6 +96,8 @@ static int vcpu_arm(struct xc_dom_image *dom, void *ptr)
 
     ctxt->user_regs.cpsr = PSR_ABT_MASK|PSR_FIQ_MASK|PSR_IRQ_MASK|PSR_MODE_SVC;
 
+    ctxt->flags = VGCF_online;
+
     DOMPRINTF("Initial state CPSR %#"PRIx32" PC %#"PRIx32,
            ctxt->user_regs.cpsr, ctxt->user_regs.pc);
 
diff --git a/xen/arch/arm/domain.c b/xen/arch/arm/domain.c
index ac6a30d..f61568b 100644
--- a/xen/arch/arm/domain.c
+++ b/xen/arch/arm/domain.c
@@ -416,7 +416,10 @@ int arch_set_info_guest(
     v->arch.ttbr1 = ctxt->ttbr1;
     v->arch.ttbcr = ctxt->ttbcr;
 
-    clear_bit(_VPF_down, &v->pause_flags);
+    if ( ctxt->flags & VGCF_online )
+        clear_bit(_VPF_down, &v->pause_flags);
+    else
+        set_bit(_VPF_down, &v->pause_flags);
 
     return 0;
 }
diff --git a/xen/include/public/arch-arm.h b/xen/include/public/arch-arm.h
index 7ebe966..6e0fe47 100644
--- a/xen/include/public/arch-arm.h
+++ b/xen/include/public/arch-arm.h
@@ -124,6 +124,10 @@ typedef uint32_t xen_ulong_t;
 #define PRI_xen_ulong PRIx32
 
 struct vcpu_guest_context {
+#define _VGCF_online                   0
+#define VGCF_online                    (1<<_VGCF_online)
+    uint32_t flags;                         /* VGCF_* */
+
     struct cpu_user_regs user_regs;         /* User-level CPU registers     */
 
     uint32_t sctlr;
-- 
1.7.9.1