[PATCH 01/16] introduce vcpu struct

[Glauber de Oliveira Costa]

this patch introduces a vcpu struct for lguest. In upcoming patches,
more and more fields will be moved from the lguest struct to the vcpu

Signed-off-by: Glauber de Oliveira Costa <gcosta@xxxxxxxxxx>
---
 drivers/lguest/lg.h |   15 +++++++++++++++
 1 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/drivers/lguest/lg.h b/drivers/lguest/lg.h
index 8692489..9723732 100644
--- a/drivers/lguest/lg.h
+++ b/drivers/lguest/lg.h
@@ -38,6 +38,13 @@ struct lguest_pages
 #define CHANGED_GDT_TLS		4 /* Actually a subset of CHANGED_GDT */
 #define CHANGED_ALL	        3
 
+struct lguest;
+
+struct lguest_vcpu {
+	int vcpu_id;
+	struct lguest *lg;
+};
+
 /* The private info the thread maintains about the guest. */
 struct lguest
 {
@@ -47,6 +54,9 @@ struct lguest
 	struct lguest_data __user *lguest_data;
 	struct task_struct *tsk;
 	struct mm_struct *mm; 	/* == tsk->mm, but that becomes NULL on exit */
+	struct lguest_vcpu vcpus[NR_CPUS];
+	unsigned int nr_vcpus;
+
 	u32 pfn_limit;
 	/* This provides the offset to the base of guest-physical
 	 * memory in the Launcher. */
@@ -92,6 +102,11 @@ struct lguest
 	DECLARE_BITMAP(irqs_pending, LGUEST_IRQS);
 };
 
+static inline struct lguest *lg_of_vcpu(struct lguest_vcpu *vcpu)
+{
+	return container_of((vcpu - vcpu->vcpu_id), struct lguest, vcpus[0]);
+}
+
 extern struct mutex lguest_lock;
 
 /* core.c: */
-- 
1.5.0.6

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