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kernel: enable memory mapped TPM interface on armsr

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The memory mapped TPM interface (TIS) can be used for
emulated or virtualized TPM instances with QEMU and
a simulation package like swtpm.

On QEMU the device will appear in the device tree
with a "tcg,tpm-tis-mmio" compatible.

For example:
qemu-system-aarch64 -machine virt -cpu max \
    -bios u-boot.bin \
    -nographic \
    .... \
    -hda openwrt-armsr-armv8-combined-efi.img \
    -chardev socket,id=chrtpm,path=/tmp/mytpm/swtpm-sock \
    -tpmdev emulator,id=tpm0,chardev=chrtpm \
    -device tpm-tis-device,tpmdev=tpm0

Signed-off-by: Mathew McBride <matt@traverse.com.au>
Link: https://github.com/openwrt/openwrt/pull/19188
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Mathew McBride 2025-06-12 12:17:47 +10:00 committed by coolsnowwolf
parent e908e5a463
commit 264661a704
1 changed files with 1 additions and 1 deletions
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2
package/kernel/linux/modules/other.mk
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@ -1272,7 +1272,7 @@ $(eval $(call KernelPackage,tpm))
define KernelPackage/tpm-tis
SUBMENU:=$(OTHER_MENU)
TITLE:=TPM TIS 1.2 Interface / TPM 2.0 FIFO Interface
DEPENDS:= @TARGET_x86 +kmod-tpm
DEPENDS:= @(TARGET_x86||TARGET_armsr) +kmod-tpm
KCONFIG:= CONFIG_TCG_TIS
FILES:= \
$(LINUX_DIR)/drivers/char/tpm/tpm_tis.ko \