From 325b7c4e7582c229d28c47123c3b986ed948eb84 Mon Sep 17 00:00:00 2001 From: Alistair Francis Date: Thu, 28 Apr 2022 09:41:46 +1000 Subject: hw/riscv: Enable TPM backends Imply the TPM sysbus devices. This allows users to add TPM devices to the RISC-V virt board. This was tested by first creating an emulated TPM device: swtpm socket --tpm2 -t -d --tpmstate dir=/tmp/tpm \ --ctrl type=unixio,path=swtpm-sock Then launching QEMU with: -chardev socket,id=chrtpm,path=swtpm-sock \ -tpmdev emulator,id=tpm0,chardev=chrtpm \ -device tpm-tis-device,tpmdev=tpm0 The TPM device can be seen in the memory tree and the generated device tree. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/942 Signed-off-by: Alistair Francis Reviewed-by: Edgar E. Iglesias Reviewed-by: Bin Meng Message-Id: <20220427234146.1130752-7-alistair.francis@opensource.wdc.com> Signed-off-by: Alistair Francis --- docs/system/riscv/virt.rst | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'docs') diff --git a/docs/system/riscv/virt.rst b/docs/system/riscv/virt.rst index 1272b6659e..f8ecec95f3 100644 --- a/docs/system/riscv/virt.rst +++ b/docs/system/riscv/virt.rst @@ -162,3 +162,23 @@ The minimal QEMU commands to run U-Boot SPL are: To test 32-bit U-Boot images, switch to use qemu-riscv32_smode_defconfig and riscv32_spl_defconfig builds, and replace ``qemu-system-riscv64`` with ``qemu-system-riscv32`` in the command lines above to boot the 32-bit U-Boot. + +Enabling TPM +------------ + +A TPM device can be connected to the virt board by following the steps below. + +First launch the TPM emulator + + swtpm socket --tpm2 -t -d --tpmstate dir=/tmp/tpm \ + --ctrl type=unixio,path=swtpm-sock + +Then launch QEMU with: + + ... + -chardev socket,id=chrtpm,path=swtpm-sock \ + -tpmdev emulator,id=tpm0,chardev=chrtpm \ + -device tpm-tis-device,tpmdev=tpm0 + +The TPM device can be seen in the memory tree and the generated device +tree and should be accessible from the guest software. -- cgit v1.2.3