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Groups > linux.kernel > #1163148

[v4 02/16] KVM: Add some helper functions for Posted-Interrupts

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This patch adds some helper functions to manipulate the
Posted-Interrupts Descriptor.

Signed-off-by: Feng Wu <feng.wu@intel.com>
---
 arch/x86/kvm/vmx.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index bd26501..8be6aa4 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -443,6 +443,8 @@ struct nested_vmx {
 };
 
 #define POSTED_INTR_ON  0
+#define POSTED_INTR_SN  1
+
 /* Posted-Interrupt Descriptor */
 struct pi_desc {
 	u32 pir[8];     /* Posted interrupt requested */
@@ -483,6 +485,30 @@ static int pi_test_and_set_pir(int vector, struct pi_desc *pi_desc)
 	return test_and_set_bit(vector, (unsigned long *)pi_desc->pir);
 }
 
+static void pi_clear_sn(struct pi_desc *pi_desc)
+{
+	return clear_bit(POSTED_INTR_SN,
+			(unsigned long *)&pi_desc->control);
+}
+
+static void pi_set_sn(struct pi_desc *pi_desc)
+{
+	return set_bit(POSTED_INTR_SN,
+			(unsigned long *)&pi_desc->control);
+}
+
+static int pi_test_on(struct pi_desc *pi_desc)
+{
+	return test_bit(POSTED_INTR_ON,
+			(unsigned long *)&pi_desc->control);
+}
+
+static int pi_test_sn(struct pi_desc *pi_desc)
+{
+	return test_bit(POSTED_INTR_SN,
+			(unsigned long *)&pi_desc->control);
+}
+
 struct vcpu_vmx {
 	struct kvm_vcpu       vcpu;
 	unsigned long         host_rsp;
-- 
2.1.0

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Thread

[v4 00/16] Add VT-d Posted-Interrupts support Feng Wu <feng.wu@intel.com> - 2015-06-11 13:10 +0200
  [v4 12/16] KVM: kvm-vfio: implement the VFIO skeleton for VT-d Posted-Interrupts Feng Wu <feng.wu@intel.com> - 2015-06-11 13:10 +0200
    RE: [v4 12/16] KVM: kvm-vfio: implement the VFIO skeleton for VT-d  Posted-Interrupts "Wu, Feng" <feng.wu@intel.com> - 2015-06-12 07:00 +0200
  [v4 13/16] KVM: x86: kvm-vfio: VT-d posted-interrupts setup Feng Wu <feng.wu@intel.com> - 2015-06-11 13:10 +0200
    RE: [v4 13/16] KVM: x86: kvm-vfio: VT-d posted-interrupts setup "Wu, Feng" <feng.wu@intel.com> - 2015-06-12 07:00 +0200
  [v4 15/16] KVM: Update Posted-Interrupts Descriptor when vCPU is blocked Feng Wu <feng.wu@intel.com> - 2015-06-11 13:10 +0200
  [v4 07/16] KVM: make kvm_set_msi_irq() public Feng Wu <feng.wu@intel.com> - 2015-06-11 13:10 +0200
  [v4 10/16] KVM: kvm-vfio: wrappers to VFIO external API device helpers Feng Wu <feng.wu@intel.com> - 2015-06-11 13:10 +0200
  [v4 11/16] KVM: kvm-vfio: User API for VT-d Posted-Interrupts Feng Wu <feng.wu@intel.com> - 2015-06-11 13:10 +0200
  [v4 05/16] KVM: Add interfaces to control PI outside vmx Feng Wu <feng.wu@intel.com> - 2015-06-11 13:10 +0200
  [v4 14/16] KVM: Update Posted-Interrupts Descriptor when vCPU is preempted Feng Wu <feng.wu@intel.com> - 2015-06-11 13:10 +0200
  [v4 02/16] KVM: Add some helper functions for Posted-Interrupts Feng Wu <feng.wu@intel.com> - 2015-06-11 13:10 +0200
  [v4 16/16] KVM: Warn if 'SN' is set during posting interrupts by software Feng Wu <feng.wu@intel.com> - 2015-06-11 13:10 +0200
  [v4 04/16] KVM: Get Posted-Interrupts descriptor address from struct kvm_vcpu Feng Wu <feng.wu@intel.com> - 2015-06-11 13:10 +0200
  [v4 01/16] KVM: Extend struct pi_desc for VT-d Posted-Interrupts Feng Wu <feng.wu@intel.com> - 2015-06-11 13:10 +0200
  [v4 09/16] VFIO: external user API for interaction Feng Wu <feng.wu@intel.com> - 2015-06-11 13:10 +0200

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