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authorNinad Palsule <ninad@linux.ibm.com>2023-04-14 17:07:54 -0500
committerStefan Berger <stefanb@linux.ibm.com>2023-04-20 08:17:15 -0400
commit139fdb3ed8f593b03f78ec9984467562331ef98c (patch)
tree39aab76b42f9a3532f4990c1ee785f6a65db53f0 /hw/arm/Kconfig
parentbbadfb2e0af238576646e0fc8e0b5e4f4fe29648 (diff)
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tpm: Add support for TPM device over I2C bus
Qemu already supports devices attached to ISA and sysbus. This drop adds support for the I2C bus attached TPM devices. I2C model only supports TPM2 protocol. This commit includes changes for the common code. - Added I2C emulation model. Logic was added in the model to temporarily cache the data as I2C interface works per byte basis. - New tpm type "tpm-tis-i2c" added for I2C support. The user has to provide this string on command line. Testing: TPM I2C device module is tested using SWTPM (software based TPM package). Qemu uses the rainier machine and is connected to swtpm over the socket interface. The command to start swtpm is as follows: $ swtpm socket --tpmstate dir=/tmp/mytpm1 \ --ctrl type=unixio,path=/tmp/mytpm1/swtpm-sock \ --tpm2 --log level=100 The command to start qemu is as follows: $ qemu-system-arm -M rainier-bmc -nographic \ -kernel ${IMAGEPATH}/fitImage-linux.bin \ -dtb ${IMAGEPATH}/aspeed-bmc-ibm-rainier.dtb \ -initrd ${IMAGEPATH}/obmc-phosphor-initramfs.rootfs.cpio.xz \ -drive file=${IMAGEPATH}/obmc-phosphor-image.rootfs.wic.qcow2,if=sd,index=2 \ -net nic -net user,hostfwd=:127.0.0.1:2222-:22,hostfwd=:127.0.0.1:2443-:443 \ -chardev socket,id=chrtpm,path=/tmp/mytpm1/swtpm-sock \ -tpmdev emulator,id=tpm0,chardev=chrtpm \ -device tpm-tis-i2c,tpmdev=tpm0,bus=aspeed.i2c.bus.12,address=0x2e Signed-off-by: Ninad Palsule <ninad@linux.ibm.com> Reviewed-by: Stefan Berger <stefanb@linux.ibm.com> Tested-by: Stefan Berger <stefanb@linux.ibm.com> Reviewed-by: Cédric Le Goater <clg@kaod.org> Reviewed-by: Joel Stanley <joel@jms.id.au> Tested-by: Joel Stanley <joel@jms.id.au> Message-id: 20230414220754.1191476-4-ninadpalsule@us.ibm.com
Diffstat (limited to 'hw/arm/Kconfig')
-rw-r--r--hw/arm/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
index b5aed4a..05d6ef1 100644
--- a/hw/arm/Kconfig
+++ b/hw/arm/Kconfig
@@ -6,6 +6,7 @@ config ARM_VIRT
imply VFIO_PLATFORM
imply VFIO_XGMAC
imply TPM_TIS_SYSBUS
+ imply TPM_TIS_I2C
imply NVDIMM
select ARM_GIC
select ACPI