diff options
| author | Sean Christopherson <seanjc@google.com> | 2021-05-04 17:27:34 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2021-05-05 22:54:12 +0200 |
| commit | 1ca0016c149be35fe19a6b75fce95c25807b7159 (patch) | |
| tree | ad69f06a18acb03fb414e9b18dca1e25da3eaace /include/linux/context_tracking.h | |
| parent | 14296e0c447885d6c7b326e059fb528eb00526ed (diff) | |
context_tracking: KVM: Move guest enter/exit wrappers to KVM's domain
Move the guest enter/exit wrappers to kvm_host.h so that KVM can manage
its context tracking vs. vtime accounting without bleeding too many KVM
details into the context tracking code.
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20210505002735.1684165-8-seanjc@google.com
Diffstat (limited to 'include/linux/context_tracking.h')
| -rw-r--r-- | include/linux/context_tracking.h | 45 |
1 files changed, 0 insertions, 45 deletions
diff --git a/include/linux/context_tracking.h b/include/linux/context_tracking.h index aa58c2ac67ca..4d7fced3a39f 100644 --- a/include/linux/context_tracking.h +++ b/include/linux/context_tracking.h @@ -118,49 +118,4 @@ extern void context_tracking_init(void); static inline void context_tracking_init(void) { } #endif /* CONFIG_CONTEXT_TRACKING_FORCE */ -/* must be called with irqs disabled */ -static __always_inline void guest_enter_irqoff(void) -{ - /* - * This is running in ioctl context so its safe to assume that it's the - * stime pending cputime to flush. - */ - instrumentation_begin(); - vtime_account_guest_enter(); - instrumentation_end(); - - /* - * KVM does not hold any references to rcu protected data when it - * switches CPU into a guest mode. In fact switching to a guest mode - * is very similar to exiting to userspace from rcu point of view. In - * addition CPU may stay in a guest mode for quite a long time (up to - * one time slice). Lets treat guest mode as quiescent state, just like - * we do with user-mode execution. - */ - if (!context_tracking_guest_enter()) { - instrumentation_begin(); - rcu_virt_note_context_switch(smp_processor_id()); - instrumentation_end(); - } -} - -static __always_inline void guest_exit_irqoff(void) -{ - context_tracking_guest_exit(); - - instrumentation_begin(); - /* Flush the guest cputime we spent on the guest */ - vtime_account_guest_exit(); - instrumentation_end(); -} - -static inline void guest_exit(void) -{ - unsigned long flags; - - local_irq_save(flags); - guest_exit_irqoff(); - local_irq_restore(flags); -} - #endif |