[v5 05/19] 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 9df0724..739fd14 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -838,6 +838,9 @@ 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);
 };
 
 struct kvm_arch_async_pf {
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 1b33e33..35ef4c6 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -614,6 +614,16 @@ 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
@@ -10307,6 +10317,9 @@ static struct kvm_x86_ops vmx_x86_ops = {
 	.enable_log_dirty_pt_masked = vmx_enable_log_dirty_pt_masked,
 
 	.get_pi_desc_addr = vmx_get_pi_desc_addr,
+
+	.pi_clear_sn = vmx_pi_clear_sn,
+	.pi_set_sn = vmx_pi_set_sn,
 };
 
 static int __init vmx_init(void)
-- 
2.1.0

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