linux-kernel - [RFC v5 10/13] kvm: introduce kvm_arch_halt_guest and kvm_arch_resume

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Message-Id: <1426776951-24901-11-git-send-email-eric.auger@linaro.org>
Date:	Thu, 19 Mar 2015 15:55:48 +0100
From:	Eric Auger <eric.auger@...aro.org>
To:	eric.auger@...com, eric.auger@...aro.org,
	christoffer.dall@...aro.org, marc.zyngier@....com,
	linux-arm-kernel@...ts.infradead.org, kvm@...r.kernel.org,
	alex.williamson@...hat.com
Cc:	linux-kernel@...r.kernel.org, patches@...aro.org,
	pbonzini@...hat.com, kim.phillips@...escale.com,
	b.reynal@...tualopensystems.com, feng.wu@...el.com
Subject: [RFC v5 10/13] kvm: introduce kvm_arch_halt_guest and kvm_arch_resume_guest

This API allows to
- exit the guest and avoid re-entering it
- resume the guest execution

Signed-off-by: Eric Auger <eric.auger@...aro.org>
---
 include/linux/kvm_host.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index ae9c720..f4e1829 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -1053,6 +1053,18 @@ extern struct kvm_device_ops kvm_xics_ops;
 extern struct kvm_device_ops kvm_arm_vgic_v2_ops;
 extern struct kvm_device_ops kvm_arm_vgic_v3_ops;
 
+#ifdef __KVM_HAVE_ARCH_HALT_GUEST
+
+void kvm_arch_halt_guest(struct kvm *kvm);
+void kvm_arch_resume_guest(struct kvm *kvm);
+
+#else
+
+inline void kvm_arch_halt_guest(struct kvm *kvm) {}
+inline void kvm_arch_resume_guest(struct kvm *kvm) {}
+
+#endif
+
 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
 
 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
-- 
1.9.1

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