On Wed, May 10, 2017 at 07:54:22PM -0400, Stefan Berger wrote: > Implement the request_locality function. To set the locality on the > backend we define vendor-specific TPM 1.2 and TPM 2 ordinals and send > a command to the backend to set the locality for the next commands. > > Signed-off-by: Stefan Berger <[email protected]> > --- > drivers/char/tpm/tpm.h | 1 + > drivers/char/tpm/tpm_vtpm_proxy.c | 34 ++++++++++++++++++++++++++++++++++ > include/uapi/linux/vtpm_proxy.h | 5 +++++ > 3 files changed, 40 insertions(+) > > diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h > index 4b4c8de..10f0467 100644 > --- a/drivers/char/tpm/tpm.h > +++ b/drivers/char/tpm/tpm.h > @@ -527,6 +527,7 @@ enum tpm_transmit_flags { > TPM_TRANSMIT_UNLOCKED = BIT(0), > }; > > +ssize_t tpm_transfer(struct tpm_chip *chip, u8 *buf, u32 count, size_t > bufsiz); > ssize_t tpm_transmit(struct tpm_chip *chip, struct tpm_space *space, > u8 *buf, size_t bufsiz, unsigned int flags); > ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_space *space, > diff --git a/drivers/char/tpm/tpm_vtpm_proxy.c > b/drivers/char/tpm/tpm_vtpm_proxy.c > index 751059d..374c4ff 100644 > --- a/drivers/char/tpm/tpm_vtpm_proxy.c > +++ b/drivers/char/tpm/tpm_vtpm_proxy.c > @@ -371,6 +371,39 @@ static bool vtpm_proxy_tpm_req_canceled(struct tpm_chip > *chip, u8 status) > return ret; > } > > +static int vtpm_proxy_request_locality(struct tpm_chip *chip, int locality) > +{ > + struct tpm_buf buf; > + int rc; > + const struct tpm_output_header *header; > + > + if (chip->flags & TPM_CHIP_FLAG_TPM2) > + rc = tpm_buf_init(&buf, TPM2_ST_SESSIONS, > + TPM2_CC_SET_LOCALITY); > + else > + rc = tpm_buf_init(&buf, TPM_TAG_RQU_COMMAND, > + TPM_ORD_SET_LOCALITY); > + if (rc) > + return rc; > + tpm_buf_append_u8(&buf, locality); > + > + rc = tpm_transfer(chip, buf.data, tpm_buf_length(&buf), PAGE_SIZE); > + if (rc < 0) { > + locality = rc; > + goto out; > + } > + > + header = (const struct tpm_output_header *)buf.data; > + rc = be32_to_cpu(header->return_code); > + if (rc) > + locality = -1; > + > +out: > + tpm_buf_destroy(&buf); > + > + return locality; > +} > + > static const struct tpm_class_ops vtpm_proxy_tpm_ops = { > .flags = TPM_OPS_AUTO_STARTUP, > .recv = vtpm_proxy_tpm_op_recv, > @@ -380,6 +413,7 @@ static const struct tpm_class_ops vtpm_proxy_tpm_ops = { > .req_complete_mask = VTPM_PROXY_REQ_COMPLETE_FLAG, > .req_complete_val = VTPM_PROXY_REQ_COMPLETE_FLAG, > .req_canceled = vtpm_proxy_tpm_req_canceled, > + .request_locality = vtpm_proxy_request_locality, > }; > > /* > diff --git a/include/uapi/linux/vtpm_proxy.h b/include/uapi/linux/vtpm_proxy.h > index a69e991..6b91c2c 100644 > --- a/include/uapi/linux/vtpm_proxy.h > +++ b/include/uapi/linux/vtpm_proxy.h > @@ -46,4 +46,9 @@ struct vtpm_proxy_new_dev { > > #define VTPM_PROXY_IOC_NEW_DEV _IOWR(0xa1, 0x00, struct > vtpm_proxy_new_dev) > > +/* vendor specific commands to set locality */ > +#define TPM2_CC_SET_LOCALITY 0x20001000 > +#define TPM_ORD_SET_LOCALITY 0x20001000 > + > + > #endif /* _UAPI_LINUX_VTPM_PROXY_H */ > -- > 2.4.3
This is a question. Did you have some kind of big idea with 0x20? I was just thinking that one way to do this would to allocate starting from 0xFFFFFFFF. /Jarkko ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ tpmdd-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/tpmdd-devel
