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    SubjectRE: [PATCH 5/6] x86/hyperv: Support hypercalls for TDX guests
    Date
    > From: Michael Kelley (LINUX) <mikelley@microsoft.com>
    > Sent: Sunday, November 27, 2022 5:21 PM
    > > [...]
    > > +u64 hv_tdx_hypercall(u64 control, u64 input_addr, u64 output_addr)
    > > +{
    > > + struct tdx_hypercall_args args = { };
    > > +
    > > + if (!(control & HV_HYPERCALL_FAST_BIT)) {
    > > + if (input_addr)
    > > + input_addr += ms_hyperv.shared_gpa_boundary;
    >
    > At one point when working with the vTOM code, I realized that or'ing in
    > the shared_gpa_boundary is probably safer than add'ing it, just in case
    > the physical address already has vTOM set. I don't know if that possibility
    > exists here, but it's something to consider as being slightly more robust.
    >
    > > +
    > > + if (output_addr)
    > > + output_addr += ms_hyperv.shared_gpa_boundary;
    >
    > Same here.

    Ok, will use |= in all the reference.

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