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authorStefano Stabellini <stefano.stabellini@eu.citrix.com>2013-05-01 20:32:28 +0100
committerIan Campbell <ian.campbell@citrix.com>2013-05-08 13:01:45 +0100
commit3b38da86878c36a7ec3e020879a0de3f5b293d95 (patch)
treedb4267ddf3c6625bb6706361c3552ac576cbde32
parent8968bafa3170d46d21d8f6ee2d0856f270c864ad (diff)
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xen/arm: handle the runstate_memory_area
Support VCPUOP_register_runstate_memory_area on ARM. Update_runstate_area on context switch. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Ian Campbell <ian.campbell@citrix.com>
-rw-r--r--xen/arch/arm/domain.c22
1 files changed, 16 insertions, 6 deletions
diff --git a/xen/arch/arm/domain.c b/xen/arch/arm/domain.c
index b22d902f6f..9ca44eaa4e 100644
--- a/xen/arch/arm/domain.c
+++ b/xen/arch/arm/domain.c
@@ -22,6 +22,7 @@
#include <asm/current.h>
#include <asm/event.h>
+#include <asm/guest_access.h>
#include <asm/regs.h>
#include <asm/p2m.h>
#include <asm/irq.h>
@@ -212,16 +213,25 @@ static void ctxt_switch_to(struct vcpu *n)
virt_timer_restore(n);
}
+/* Update per-VCPU guest runstate shared memory area (if registered). */
+static void update_runstate_area(struct vcpu *v)
+{
+ if ( guest_handle_is_null(runstate_guest(v)) )
+ return;
+
+ __copy_to_guest(runstate_guest(v), &v->runstate, 1);
+}
+
static void schedule_tail(struct vcpu *prev)
{
ctxt_switch_from(prev);
local_irq_enable();
- /* TODO
- update_runstate_area(current);
- */
ctxt_switch_to(current);
+
+ if ( prev != current )
+ update_runstate_area(current);
}
static void continue_new_vcpu(struct vcpu *prev)
@@ -241,9 +251,8 @@ void context_switch(struct vcpu *prev, struct vcpu *next)
ASSERT(prev != next);
ASSERT(cpumask_empty(next->vcpu_dirty_cpumask));
- /* TODO
- update_runstate_area(prev);
- */
+ if ( prev != next )
+ update_runstate_area(prev);
local_irq_disable();
@@ -639,6 +648,7 @@ long do_arm_vcpu_op(int cmd, int vcpuid, XEN_GUEST_HANDLE_PARAM(void) arg)
switch ( cmd )
{
case VCPUOP_register_vcpu_info:
+ case VCPUOP_register_runstate_memory_area:
return do_vcpu_op(cmd, vcpuid, arg);
default:
return -EINVAL;