[v4 05/16] KVM: Add interfaces to control PI outside vmx

Feng Wu
2015-06-11T11:02:23Z

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@intel.com>
---
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 c7a09fb..69bc770 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -835,6 +835,9 @@ 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 ccc9ce4..dd3c63a 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
@@ -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