The following series of patches implements a multi-instance vTPM proxy driver that can dynamically create TPM 'server' and client device pairs.
Using an ioctl on the provided /dev/vtpmx, a client-side vTPM device and a server side file descriptor is created. The file descriptor must be passed to a TPM emulator. The device driver will initialize the emulated TPM using TPM 1.2 or TPM 2 startup commands and it will read the command durations from the device in case of a TPM 1.2. The choice of emulated TPM device (1.2 or 2) must be provided with a flag in the ioctl. The driver is based on a recent checkout of James Morris's 'next' branch and uses several recently posted patches from Jason and Jarkko. Stefan v7->v8: - minor tweaks on the documentation - Reordered function calls in the VTPM proxy driver's server side release function so that a client holding the 'ops' lock releases it before the driver tries to grab the lock when unregistering the device. v6->v7: - Adjusted name of driver to tpm_vtpm_proxy from tpm_vtpm. Adjust function names, names of structures, and names of constants. - Adjusted IOCTL to use magic 0xa1 rather than the completely used 0xa0. - Extended driver documentation and added documentation of ioctl. - Moved test program to own project (dropped patch 11). v5->v6: - Adapted errno's for unsupported flags and ioctls following Jason's comments v4->v5: - Introduced different error codes for unsupported flags and ioctls - Added documentation patch Jason Gunthorpe (4): tpm: Get rid of chip->pdev tpm: Get rid of devname tpm: Provide strong locking for device removal tpm: Split out the devm stuff from tpmm_chip_alloc Stefan Berger (6): tpm: Get rid of module locking tpm: Replace device number bitmap with IDR tpm: Introduce TPM_CHIP_FLAG_VIRTUAL tpm: Proxy driver for supporting multiple emulated TPMs tpm: Initialize TPM and get durations and timeouts tpm: Add documentation for the tpm_vtpm device driver Documentation/ioctl/ioctl-number.txt | 1 + Documentation/tpm/tpm_vtpm_proxy.txt | 71 ++++ drivers/char/tpm/Kconfig | 10 + drivers/char/tpm/Makefile | 1 + drivers/char/tpm/tpm-chip.c | 221 ++++++++---- drivers/char/tpm/tpm-dev.c | 15 +- drivers/char/tpm/tpm-interface.c | 50 +-- drivers/char/tpm/tpm-sysfs.c | 22 +- drivers/char/tpm/tpm.h | 30 +- drivers/char/tpm/tpm2-cmd.c | 8 +- drivers/char/tpm/tpm_atmel.c | 14 +- drivers/char/tpm/tpm_eventlog.c | 2 +- drivers/char/tpm/tpm_eventlog.h | 2 +- drivers/char/tpm/tpm_i2c_atmel.c | 16 +- drivers/char/tpm/tpm_i2c_infineon.c | 6 +- drivers/char/tpm/tpm_i2c_nuvoton.c | 24 +- drivers/char/tpm/tpm_infineon.c | 22 +- drivers/char/tpm/tpm_nsc.c | 20 +- drivers/char/tpm/tpm_tis.c | 18 +- drivers/char/tpm/tpm_vtpm_proxy.c | 649 +++++++++++++++++++++++++++++++++++ include/uapi/linux/Kbuild | 1 + include/uapi/linux/vtpm_proxy.h | 42 +++ 22 files changed, 1066 insertions(+), 179 deletions(-) create mode 100644 Documentation/tpm/tpm_vtpm_proxy.txt create mode 100644 drivers/char/tpm/tpm_vtpm_proxy.c create mode 100644 include/uapi/linux/vtpm_proxy.h -- 2.4.3
