From 79390289cfeb6d0f4295ca32a54630c93154428e Mon Sep 17 00:00:00 2001
From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Date: Thu, 8 May 2014 16:54:02 +0100
Subject: [PATCH] arm,arm64/xen: introduce HYPERVISOR_suspend()
Introduce HYPERVISOR_suspend() and a few additional empty stubs for
Xen arch specific functions called by drivers/xen/manage.c.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
---
arch/arm/include/asm/xen/hypercall.h | 10 ++++++++++
arch/arm/xen/enlighten.c | 8 ++++++++
2 files changed, 18 insertions(+)
diff --git a/arch/arm/include/asm/xen/hypercall.h b/arch/arm/include/asm/xen/hypercall.h
index 7658150488d6..712b50e0a6dc 100644
--- a/arch/arm/include/asm/xen/hypercall.h
+++ b/arch/arm/include/asm/xen/hypercall.h
@@ -34,6 +34,7 @@
#define _ASM_ARM_XEN_HYPERCALL_H
#include <xen/interface/xen.h>
+#include <xen/interface/sched.h>
long privcmd_call(unsigned call, unsigned long a1,
unsigned long a2, unsigned long a3,
@@ -50,6 +51,15 @@ int HYPERVISOR_vcpu_op(int cmd, int vcpuid, void *extra_args);
int HYPERVISOR_tmem_op(void *arg);
int HYPERVISOR_multicall(struct multicall_entry *calls, uint32_t nr);
+static inline int
+HYPERVISOR_suspend(unsigned long start_info_mfn)
+{
+ struct sched_shutdown r = { .reason = SHUTDOWN_suspend };
+
+ /* start_info_mfn is unused on ARM */
+ return HYPERVISOR_sched_op(SCHEDOP_shutdown, &r);
+}
+
static inline void
MULTI_update_va_mapping(struct multicall_entry *mcl, unsigned long va,
unsigned int new_val, unsigned long flags)
diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
index 488ecdb5550d..1e632430570b 100644
--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -339,6 +339,14 @@ static int __init xen_pm_init(void)
}
late_initcall(xen_pm_init);
+
+/* empty stubs */
+void xen_arch_pre_suspend(void) { }
+void xen_arch_post_suspend(int suspend_cancelled) { }
+void xen_timer_resume(void) { }
+void xen_arch_resume(void) { }
+
+
/* In the hypervisor.S file. */
EXPORT_SYMBOL_GPL(HYPERVISOR_event_channel_op);
EXPORT_SYMBOL_GPL(HYPERVISOR_grant_table_op);