[PATCH v6 05/16] KVM: Add interfaces to control PI outside vmx

[Feng Wu]

This patch adds pi_clear_sn and pi_set_sn to struct kvm_x86_ops,
so we can set/clear SN outside vmx.

Signed-off-by: Feng Wu <feng.wu@xxxxxxxxx>
---
 arch/x86/include/asm/kvm_host.h |  3 +++
 arch/x86/kvm/vmx.c              | 13 +++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index d50c1d3..c4f99f1 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -860,6 +860,9 @@ struct kvm_x86_ops {
 					   gfn_t offset, unsigned long mask);
 
 	u64 (*get_pi_desc_addr)(struct kvm_vcpu *vcpu);
+
+	void (*pi_clear_sn)(struct kvm_vcpu *vcpu);
+	void (*pi_set_sn)(struct kvm_vcpu *vcpu);
 	/* pmu operations of sub-arch */
 	const struct kvm_pmu_ops *pmu_ops;
 };
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 81a995c..234f720 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -615,6 +615,16 @@ struct pi_desc *vcpu_to_pi_desc(struct kvm_vcpu *vcpu)
 	return &(to_vmx(vcpu)->pi_desc);
 }
 
+static void vmx_pi_clear_sn(struct kvm_vcpu *vcpu)
+{
+	pi_clear_sn(vcpu_to_pi_desc(vcpu));
+}
+
+static void vmx_pi_set_sn(struct kvm_vcpu *vcpu)
+{
+	pi_set_sn(vcpu_to_pi_desc(vcpu));
+}
+
 static unsigned long shadow_read_only_fields[] = {
 	/*
 	 * We do NOT shadow fields that are modified when L0
@@ -10471,6 +10481,9 @@ static struct kvm_x86_ops vmx_x86_ops = {
 
 	.get_pi_desc_addr = vmx_get_pi_desc_addr,
 
+	.pi_clear_sn = vmx_pi_clear_sn,
+	.pi_set_sn = vmx_pi_set_sn,
+
 	.pmu_ops = &intel_pmu_ops,
 };
 
-- 
2.1.0

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