From: Ilias Apalodimas Date: Tue, 9 Nov 2021 07:02:21 +0000 (+0200) Subject: doc: qemu: Add instructions for swtpm usage X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=be2868f097ee06ee98e71050f18d5d729106978f;p=u-boot.git doc: qemu: Add instructions for swtpm usage A previous patch added support for an mmio based TPM. Add an example in QEMU on it's usage Reviewed-by: Simon Glass Signed-off-by: Ilias Apalodimas --- diff --git a/doc/board/emulation/qemu-arm.rst b/doc/board/emulation/qemu-arm.rst index 8d7fda10f1..584ef0a7e1 100644 --- a/doc/board/emulation/qemu-arm.rst +++ b/doc/board/emulation/qemu-arm.rst @@ -81,6 +81,31 @@ can be enabled with the following command line parameters: These have been tested in QEMU 2.9.0 but should work in at least 2.5.0 as well. +Enabling TPMv2 support +---------------------- + +To emulate a TPM the swtpm package may be used. It can be built from the +following repositories: + + https://github.com/stefanberger/swtpm.git + +Swtpm provides a socket for the TPM emulation which can be consumed by QEMU. + +In a first console invoke swtpm with:: + + swtpm socket --tpmstate dir=/tmp/mytpm1 \ + --ctrl type=unixio,path=/tmp/mytpm1/swtpm-sock --log level=20 + +In a second console invoke qemu-system-aarch64 with:: + + -chardev socket,id=chrtpm,path=/tmp/mytpm1/swtpm-sock \ + -tpmdev emulator,id=tpm0,chardev=chrtpm \ + -device tpm-tis-device,tpmdev=tpm0 + +Enable the TPM on U-Boot's command line with:: + + tpm2 startup TPM2_SU_CLEAR + Debug UART ----------