| Message ID | b5d0446fedfe5d47a8aa5e623f39cb04d62837ce.1625186503.git.isaku.yamahata@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | KVM: X86: TDX support | expand |
On 03/07/21 00:05, isaku.yamahata@intel.com wrote: > From: Isaku Yamahata <isaku.yamahata@intel.com> > > Add a document on how to integrate TDX MODULE into initrd so that > TDX MODULE can be updated on kernel startup. > > Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com> > --- > Documentation/virt/kvm/tdx-module.rst | 48 +++++++++++++++++++++++++++ > 1 file changed, 48 insertions(+) > create mode 100644 Documentation/virt/kvm/tdx-module.rst > > diff --git a/Documentation/virt/kvm/tdx-module.rst b/Documentation/virt/kvm/tdx-module.rst > new file mode 100644 > index 000000000000..8beea8302f94 > --- /dev/null > +++ b/Documentation/virt/kvm/tdx-module.rst > @@ -0,0 +1,48 @@ > +.. SPDX-License-Identifier: GPL-2.0 > + > +========== > +TDX MODULE > +========== > + > +Integrating TDX MODULE into initrd > +================================== > +If TDX is enabled in KVM(CONFIG_KVM_INTEL_TDX=y), kernel is able to load > +tdx seam module from initrd. > +The related modules (seamldr.ac, libtdx.so and libtdx.so.sigstruct) need to be > +stored in initrd. > + > +tdx-seam is a sample hook script for initramfs-tools. > +TDXSEAM_SRCDIR are the directory in the host file system to store files related > +to TDX MODULE. > + > +Since it heavily depends on distro how to prepare initrd, here's a example how > +to prepare an initrd. > +(Actually this is taken from Documentation/x86/microcode.rst) > +:: > + #!/bin/bash > + > + if [ -z "$1" ]; then > + echo "You need to supply an initrd file" > + exit 1 > + fi > + > + INITRD="$1" > + > + DSTDIR=lib/firmware/intel-seam > + TMPDIR=/tmp/initrd > + LIBTDX="/lib/firmware/intel-seam/seamldr.acm /lib/firmware/intel-seam/libtdx.so /lib/firmware/intel-seam/libtdx.so.sigstruct" > + > + rm -rf $TMPDIR > + > + mkdir $TMPDIR > + cd $TMPDIR > + mkdir -p $DSTDIR > + > + cp ${LIBTDX} ${DSTDIR} > + > + find . | cpio -o -H newc > ../tdx-seam.cpio > + cd .. > + mv $INITRD $INITRD.orig > + cat tdx-seam.cpio $INITRD.orig > $INITRD > + > + rm -rf $TMPDIR > I think this belongs in a different series that adds SEAM loading? Paolo
diff --git a/Documentation/virt/kvm/tdx-module.rst b/Documentation/virt/kvm/tdx-module.rst new file mode 100644 index 000000000000..8beea8302f94 --- /dev/null +++ b/Documentation/virt/kvm/tdx-module.rst @@ -0,0 +1,48 @@ +.. SPDX-License-Identifier: GPL-2.0 + +========== +TDX MODULE +========== + +Integrating TDX MODULE into initrd +================================== +If TDX is enabled in KVM(CONFIG_KVM_INTEL_TDX=y), kernel is able to load +tdx seam module from initrd. +The related modules (seamldr.ac, libtdx.so and libtdx.so.sigstruct) need to be +stored in initrd. + +tdx-seam is a sample hook script for initramfs-tools. +TDXSEAM_SRCDIR are the directory in the host file system to store files related +to TDX MODULE. + +Since it heavily depends on distro how to prepare initrd, here's a example how +to prepare an initrd. +(Actually this is taken from Documentation/x86/microcode.rst) +:: + #!/bin/bash + + if [ -z "$1" ]; then + echo "You need to supply an initrd file" + exit 1 + fi + + INITRD="$1" + + DSTDIR=lib/firmware/intel-seam + TMPDIR=/tmp/initrd + LIBTDX="/lib/firmware/intel-seam/seamldr.acm /lib/firmware/intel-seam/libtdx.so /lib/firmware/intel-seam/libtdx.so.sigstruct" + + rm -rf $TMPDIR + + mkdir $TMPDIR + cd $TMPDIR + mkdir -p $DSTDIR + + cp ${LIBTDX} ${DSTDIR} + + find . | cpio -o -H newc > ../tdx-seam.cpio + cd .. + mv $INITRD $INITRD.orig + cat tdx-seam.cpio $INITRD.orig > $INITRD + + rm -rf $TMPDIR