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    Subject[PATCH v9 08/18] KVM: Add some helper functions for Posted-Interrupts
    Date
    This patch adds some helper functions to manipulate the
    Posted-Interrupts Descriptor.

    Signed-off-by: Feng Wu <feng.wu@intel.com>
    Reviewed-by: Paolo Bonzini <pbonzini@redhat.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 271dd70..316f9bf 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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