On Mon, Jan 28, 2019 at 04:40:46PM +0100, Igor Mammedov wrote: > On Mon, 28 Jan 2019 10:15:55 -0500 > "Michael S. Tsirkin" <m...@redhat.com> wrote: > > > On Mon, Jan 28, 2019 at 03:45:53PM +0100, Igor Mammedov wrote: > > > On Fri, 25 Jan 2019 16:00:58 -0500 > > > Stefan Berger <stef...@linux.ibm.com> wrote: > > > > > > > This patch makes the a TPM 2.0 with TIS interface available under the > > > > HID 'MSF0101'. This is supported by Linux and also Windows now > > > MSF0101 is relatively recent addition to Linux, > > > are there in wild (old) kernels that worked with PNP0C31 but won't work > > > with MSF0101? > > > > Well what would you do? You either have TPM 2.0 or you don't. > > If you have a 2.0 backend you need to expose it as 2.0 > > to the frontend right? > I wasn't clear enough, question is: > If there are kernels where TPM2 worked with PNP0C31 and without MSF0101 > support?
As far as I can see TPM 2.0 support was added by commit 30fc8d138e9123f374a3c3867e7c7c5cd4004941 Author: Jarkko Sakkinen <jarkko.sakki...@linux.intel.com> Date: Fri Dec 12 11:46:39 2014 -0800 tpm: TPM 2.0 CRB Interface this seems to already use MSF0101. I guess the answer is no. > > > > > recognizes the TPM 2.0 with TIS interface. Leave the TPM 1.2 as before. > > > > > > > > Signed-off-by: Stefan Berger <stef...@linux.ibm.com> > > > > --- > > > > hw/i386/acpi-build.c | 12 ++++++++++-- > > > > 1 file changed, 10 insertions(+), 2 deletions(-) > > > > > > > > diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c > > > > index 2e21a31f82..f51225b4a7 100644 > > > > --- a/hw/i386/acpi-build.c > > > > +++ b/hw/i386/acpi-build.c > > > > @@ -2141,8 +2141,16 @@ build_dsdt(GArray *table_data, BIOSLinker > > > > *linker, > > > > build_append_pci_bus_devices(scope, bus, > > > > pm->pcihp_bridge_en); > > > > > > > > if (TPM_IS_TIS(tpm)) { > > > > - dev = aml_device("ISA.TPM"); > > > > - aml_append(dev, aml_name_decl("_HID", > > > > aml_eisaid("PNP0C31"))); > > > > + if (misc->tpm_version == TPM_VERSION_2_0) { > > > > + dev = aml_device("TPM"); > > > > + aml_append(dev, aml_name_decl("_HID", > > > > + > > > > aml_string("MSFT0101"))); > > > > + } else { > > > > + dev = aml_device("ISA.TPM"); > > > > + aml_append(dev, aml_name_decl("_HID", > > > > + > > > > aml_eisaid("PNP0C31"))); > > > > + } > > > > + > > > > aml_append(dev, aml_name_decl("_STA", aml_int(0xF))); > > > > crs = aml_resource_template(); > > > > aml_append(crs, aml_memory32_fixed(TPM_TIS_ADDR_BASE,