# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1261031275 0
# Node ID 49ad2a499edba92874590ecf72a7c7d216576099
# Parent ba42d74c9adc0bb73f06236d15e241e55777fe96
Base domain structure and public interface to support memory events.
Signed-off-by: Patrick Colp <Patrick.Colp@xxxxxxxxxx>
---
xen/include/public/mem_event.h | 67 +++++++++++++++++++++++++++++++++++++++++
xen/include/public/xen.h | 1
xen/include/xen/sched.h | 30 ++++++++++++++++++
3 files changed, 98 insertions(+)
diff -r ba42d74c9adc -r 49ad2a499edb xen/include/public/mem_event.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/include/public/mem_event.h Thu Dec 17 06:27:55 2009 +0000
@@ -0,0 +1,67 @@
+/******************************************************************************
+ * mem_event.h
+ *
+ * Memory event common structures.
+ *
+ * Copyright (c) 2009 by Citrix (R&D) Ltd. (Patrick Colp)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef _XEN_PUBLIC_MEM_EVENT_H
+#define _XEN_PUBLIC_MEM_EVENT_H
+
+
+#include "xen.h"
+#include "io/ring.h"
+
+
+/* Memory event notification modes */
+#define MEM_EVENT_MODE_ASYNC 0
+#define MEM_EVENT_MODE_SYNC (1 << 0)
+#define MEM_EVENT_MODE_SYNC_ALL (1 << 1)
+
+/* Memory event flags */
+#define MEM_EVENT_FLAG_PAUSED (1 << 0)
+
+
+typedef struct mem_event_shared_page {
+ int port;
+} mem_event_shared_page_t;
+
+typedef struct mem_event_st {
+ unsigned long gfn;
+ unsigned long offset;
+ unsigned long p2mt;
+ int vcpu_id;
+ uint64_t flags;
+} mem_event_request_t, mem_event_response_t;
+
+
+DEFINE_RING_TYPES(mem_event, mem_event_request_t, mem_event_response_t);
+
+
+#endif
+
+
+/*
+ * Local variables:
+ * mode: C
+ * c-set-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
diff -r ba42d74c9adc -r 49ad2a499edb xen/include/public/xen.h
--- a/xen/include/public/xen.h Thu Dec 17 06:27:55 2009 +0000
+++ b/xen/include/public/xen.h Thu Dec 17 06:27:55 2009 +0000
@@ -146,6 +146,7 @@ DEFINE_XEN_GUEST_HANDLE(xen_pfn_t);
#define VIRQ_XENOPROF 7 /* V. XenOprofile interrupt: new sample available */
#define VIRQ_CON_RING 8 /* G. (DOM0) Bytes received on console */
#define VIRQ_PCPU_STATE 9 /* G. (DOM0) PCPU state changed */
+#define VIRQ_MEM_EVENT 10 /* G. (DOM0) A memory event has occured */
/* Architecture-specific VIRQ definitions. */
#define VIRQ_ARCH_0 16
diff -r ba42d74c9adc -r 49ad2a499edb xen/include/xen/sched.h
--- a/xen/include/xen/sched.h Thu Dec 17 06:27:55 2009 +0000
+++ b/xen/include/xen/sched.h Thu Dec 17 06:27:55 2009 +0000
@@ -20,6 +20,7 @@
#include <xen/rcupdate.h>
#include <xen/irq.h>
#include <xen/mm.h>
+#include <public/mem_event.h>
#ifdef CONFIG_COMPAT
#include <compat/vcpu.h>
@@ -161,6 +162,32 @@ struct vcpu
#define domain_unlock(d) spin_unlock_recursive(&(d)->domain_lock)
#define domain_is_locked(d) spin_is_locked(&(d)->domain_lock)
+/* Memory event */
+struct mem_event_domain
+{
+ /* ring lock */
+ spinlock_t ring_lock;
+ /* shared page */
+ mem_event_shared_page_t *shared_page;
+ /* shared ring page */
+ void *ring_page;
+ /* front-end ring */
+ mem_event_front_ring_t front_ring;
+ /* if domain has been paused due to ring contention */
+ bool_t paused;
+ int paused_vcpus[MAX_VIRT_CPUS];
+ /* the memory event mode */
+ unsigned long mode;
+ /* domain to receive memory events */
+ struct domain *domain;
+ /* enabled? */
+ bool_t enabled;
+ /* event channel port (vcpu0 only) */
+ int xen_port;
+ /* tasklet */
+ struct tasklet tasklet;
+};
+
struct domain
{
domid_t domain_id;
@@ -277,6 +304,9 @@ struct domain
/* Non-migratable and non-restoreable? */
bool_t disable_migrate;
+
+ /* Memory paging support */
+ struct mem_event_domain mem_event;
};
struct domain_setup_info
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