On Tue, 15 May 2018 14:14:33 +0200
Marc-André Lureau <marcandre.lur...@redhat.com> wrote:
> This allows to pass the last failing test from the Windows HLK TPM 2.0
> TCG PPI 1.3 tests.
>
> The interface is described in the "TCG Platform Reset Attack
> Mitigation Specification", chapter 6 "ACPI _DSM Function". Whether or
> not we should have a real implementation remains an open question to me.
might it cause security issues?
What are implications of faking it and how hard it's to implement thing
per spec?
> Signed-off-by: Marc-André Lureau <marcandre.lur...@redhat.com>
> ---
> hw/i386/acpi-build.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
> index 95be4f0710..392a1e50bd 100644
> --- a/hw/i386/acpi-build.c
> +++ b/hw/i386/acpi-build.c
> @@ -2072,6 +2072,15 @@ build_tpm_ppi(Aml *dev)
> aml_append(ifctx, aml_return(aml_buffer(1, zerobyte)));
> }
> aml_append(method, ifctx);
> +
> + /* dummy MOR Memory Clear for the sake of WLK PPI test */
> + ifctx = aml_if(
> + aml_equal(aml_arg(0),
> + aml_touuid("376054ED-CC13-4675-901C-4756D7F2D45D")));
> + {
> + aml_append(ifctx, aml_return(aml_int(0)));
> + }
> + aml_append(method, ifctx);
> }
> aml_append(dev, method);
> }
