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-rw-r--r--include/linux/context_tracking.h35
-rw-r--r--include/linux/kvm_host.h37
-rw-r--r--kernel/context_tracking.c1
3 files changed, 36 insertions, 37 deletions
diff --git a/include/linux/context_tracking.h b/include/linux/context_tracking.h
index 365f4a61bf04..fc09d7b0dacf 100644
--- a/include/linux/context_tracking.h
+++ b/include/linux/context_tracking.h
@@ -3,6 +3,7 @@
3 3
4#include <linux/sched.h> 4#include <linux/sched.h>
5#include <linux/percpu.h> 5#include <linux/percpu.h>
6#include <linux/vtime.h>
6#include <asm/ptrace.h> 7#include <asm/ptrace.h>
7 8
8struct context_tracking { 9struct context_tracking {
@@ -19,6 +20,26 @@ struct context_tracking {
19 } state; 20 } state;
20}; 21};
21 22
23static inline void __guest_enter(void)
24{
25 /*
26 * This is running in ioctl context so we can avoid
27 * the call to vtime_account() with its unnecessary idle check.
28 */
29 vtime_account_system(current);
30 current->flags |= PF_VCPU;
31}
32
33static inline void __guest_exit(void)
34{
35 /*
36 * This is running in ioctl context so we can avoid
37 * the call to vtime_account() with its unnecessary idle check.
38 */
39 vtime_account_system(current);
40 current->flags &= ~PF_VCPU;
41}
42
22#ifdef CONFIG_CONTEXT_TRACKING 43#ifdef CONFIG_CONTEXT_TRACKING
23DECLARE_PER_CPU(struct context_tracking, context_tracking); 44DECLARE_PER_CPU(struct context_tracking, context_tracking);
24 45
@@ -35,6 +56,9 @@ static inline bool context_tracking_active(void)
35extern void user_enter(void); 56extern void user_enter(void);
36extern void user_exit(void); 57extern void user_exit(void);
37 58
59extern void guest_enter(void);
60extern void guest_exit(void);
61
38static inline enum ctx_state exception_enter(void) 62static inline enum ctx_state exception_enter(void)
39{ 63{
40 enum ctx_state prev_ctx; 64 enum ctx_state prev_ctx;
@@ -57,6 +81,17 @@ extern void context_tracking_task_switch(struct task_struct *prev,
57static inline bool context_tracking_in_user(void) { return false; } 81static inline bool context_tracking_in_user(void) { return false; }
58static inline void user_enter(void) { } 82static inline void user_enter(void) { }
59static inline void user_exit(void) { } 83static inline void user_exit(void) { }
84
85static inline void guest_enter(void)
86{
87 __guest_enter();
88}
89
90static inline void guest_exit(void)
91{
92 __guest_exit();
93}
94
60static inline enum ctx_state exception_enter(void) { return 0; } 95static inline enum ctx_state exception_enter(void) { return 0; }
61static inline void exception_exit(enum ctx_state prev_ctx) { } 96static inline void exception_exit(enum ctx_state prev_ctx) { }
62static inline void context_tracking_task_switch(struct task_struct *prev, 97static inline void context_tracking_task_switch(struct task_struct *prev,
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index f0eea07d2c2b..8db53cfaccdb 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -23,6 +23,7 @@
23#include <linux/ratelimit.h> 23#include <linux/ratelimit.h>
24#include <linux/err.h> 24#include <linux/err.h>
25#include <linux/irqflags.h> 25#include <linux/irqflags.h>
26#include <linux/context_tracking.h>
26#include <asm/signal.h> 27#include <asm/signal.h>
27 28
28#include <linux/kvm.h> 29#include <linux/kvm.h>
@@ -760,42 +761,6 @@ static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
760} 761}
761#endif 762#endif
762 763
763static inline void __guest_enter(void)
764{
765 /*
766 * This is running in ioctl context so we can avoid
767 * the call to vtime_account() with its unnecessary idle check.
768 */
769 vtime_account_system(current);
770 current->flags |= PF_VCPU;
771}
772
773static inline void __guest_exit(void)
774{
775 /*
776 * This is running in ioctl context so we can avoid
777 * the call to vtime_account() with its unnecessary idle check.
778 */
779 vtime_account_system(current);
780 current->flags &= ~PF_VCPU;
781}
782
783#ifdef CONFIG_CONTEXT_TRACKING
784extern void guest_enter(void);
785extern void guest_exit(void);
786
787#else /* !CONFIG_CONTEXT_TRACKING */
788static inline void guest_enter(void)
789{
790 __guest_enter();
791}
792
793static inline void guest_exit(void)
794{
795 __guest_exit();
796}
797#endif /* !CONFIG_CONTEXT_TRACKING */
798
799static inline void kvm_guest_enter(void) 764static inline void kvm_guest_enter(void)
800{ 765{
801 unsigned long flags; 766 unsigned long flags;
diff --git a/kernel/context_tracking.c b/kernel/context_tracking.c
index 65349f07b878..85bdde1137eb 100644
--- a/kernel/context_tracking.c
+++ b/kernel/context_tracking.c
@@ -15,7 +15,6 @@
15 */ 15 */
16 16
17#include <linux/context_tracking.h> 17#include <linux/context_tracking.h>
18#include <linux/kvm_host.h>
19#include <linux/rcupdate.h> 18#include <linux/rcupdate.h>
20#include <linux/sched.h> 19#include <linux/sched.h>
21#include <linux/hardirq.h> 20#include <linux/hardirq.h>