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    Subject[PATCH v19 120/130] KVM: TDX: Add a method to ignore dirty logging
    Date
    From: Isaku Yamahata <isaku.yamahata@intel.com>

    Currently TDX KVM doesn't support tracking dirty pages (yet). Implement a
    method to ignore it. Because the flag for kvm memory slot to enable dirty
    logging isn't accepted for TDX, warn on the method is called for TDX.

    Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
    ---
    arch/x86/kvm/vmx/main.c | 10 +++++++++-
    1 file changed, 9 insertions(+), 1 deletion(-)

    diff --git a/arch/x86/kvm/vmx/main.c b/arch/x86/kvm/vmx/main.c
    index 9aaa9bd7abf3..991bfdecaed2 100644
    --- a/arch/x86/kvm/vmx/main.c
    +++ b/arch/x86/kvm/vmx/main.c
    @@ -834,6 +834,14 @@ static u8 vt_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
    return vmx_get_mt_mask(vcpu, gfn, is_mmio);
    }

    +static void vt_update_cpu_dirty_logging(struct kvm_vcpu *vcpu)
    +{
    + if (KVM_BUG_ON(is_td_vcpu(vcpu), vcpu->kvm))
    + return;
    +
    + vmx_update_cpu_dirty_logging(vcpu);
    +}
    +
    static int vt_mem_enc_ioctl(struct kvm *kvm, void __user *argp)
    {
    if (!is_td(kvm))
    @@ -1008,7 +1016,7 @@ struct kvm_x86_ops vt_x86_ops __initdata = {
    .sched_in = vt_sched_in,

    .cpu_dirty_log_size = PML_ENTITY_NUM,
    - .update_cpu_dirty_logging = vmx_update_cpu_dirty_logging,
    + .update_cpu_dirty_logging = vt_update_cpu_dirty_logging,

    .nested_ops = &vmx_nested_ops,

    --
    2.25.1

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