Messages in this thread | | | Subject | Re: [PATCH v4 3/4] tpm: migrate tpm2_get_tpm_pt() to use struct tpm_buf | From | Nayna Jain <> | Date | Fri, 18 May 2018 12:01:46 +0530 |
| |
On 03/26/2018 05:44 PM, Jarkko Sakkinen wrote: > In order to make struct tpm_buf the first class object for constructing TPM > commands, migrate tpm2_get_tpm_pt() to use it. > > Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Nayna Jain<nayna@linux.vnet.ibm.com> Tested-by: Nayna Jain<nayna@linux.vnet.ibm.com>
Thanks & Regards, - Nayna
> --- > drivers/char/tpm/tpm2-cmd.c | 63 +++++++++++++++++---------------------------- > 1 file changed, 23 insertions(+), 40 deletions(-) > > diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c > index 7bffd0fd1dca..b3b52f9eb65f 100644 > --- a/drivers/char/tpm/tpm2-cmd.c > +++ b/drivers/char/tpm/tpm2-cmd.c > @@ -27,20 +27,6 @@ enum tpm2_session_attributes { > TPM2_SA_CONTINUE_SESSION = BIT(0), > }; > > -struct tpm2_get_tpm_pt_in { > - __be32 cap_id; > - __be32 property_id; > - __be32 property_cnt; > -} __packed; > - > -struct tpm2_get_tpm_pt_out { > - u8 more_data; > - __be32 subcap_id; > - __be32 property_cnt; > - __be32 property_id; > - __be32 value; > -} __packed; > - > struct tpm2_get_random_in { > __be16 size; > } __packed; > @@ -51,8 +37,6 @@ struct tpm2_get_random_out { > } __packed; > > union tpm2_cmd_params { > - struct tpm2_get_tpm_pt_in get_tpm_pt_in; > - struct tpm2_get_tpm_pt_out get_tpm_pt_out; > struct tpm2_get_random_in getrandom_in; > struct tpm2_get_random_out getrandom_out; > }; > @@ -379,19 +363,6 @@ int tpm2_get_random(struct tpm_chip *chip, u8 *out, size_t max) > return total ? total : -EIO; > } > > -#define TPM2_GET_TPM_PT_IN_SIZE \ > - (sizeof(struct tpm_input_header) + \ > - sizeof(struct tpm2_get_tpm_pt_in)) > - > -#define TPM2_GET_TPM_PT_OUT_BODY_SIZE \ > - sizeof(struct tpm2_get_tpm_pt_out) > - > -static const struct tpm_input_header tpm2_get_tpm_pt_header = { > - .tag = cpu_to_be16(TPM2_ST_NO_SESSIONS), > - .length = cpu_to_be32(TPM2_GET_TPM_PT_IN_SIZE), > - .ordinal = cpu_to_be32(TPM2_CC_GET_CAPABILITY) > -}; > - > /** > * tpm2_flush_context_cmd() - execute a TPM2_FlushContext command > * @chip: TPM chip to use > @@ -725,6 +696,14 @@ int tpm2_unseal_trusted(struct tpm_chip *chip, > return rc; > } > > +struct tpm2_get_cap_out { > + u8 more_data; > + __be32 subcap_id; > + __be32 property_cnt; > + __be32 property_id; > + __be32 value; > +} __packed; > + > /** > * tpm2_get_tpm_pt() - get value of a TPM_CAP_TPM_PROPERTIES type property > * @chip: TPM chip to use. > @@ -737,19 +716,23 @@ int tpm2_unseal_trusted(struct tpm_chip *chip, > ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id, u32 *value, > const char *desc) > { > - struct tpm2_cmd cmd; > + struct tpm2_get_cap_out *out; > + struct tpm_buf buf; > int rc; > > - cmd.header.in = tpm2_get_tpm_pt_header; > - cmd.params.get_tpm_pt_in.cap_id = cpu_to_be32(TPM2_CAP_TPM_PROPERTIES); > - cmd.params.get_tpm_pt_in.property_id = cpu_to_be32(property_id); > - cmd.params.get_tpm_pt_in.property_cnt = cpu_to_be32(1); > - > - rc = tpm_transmit_cmd(chip, NULL, &cmd, sizeof(cmd), > - TPM2_GET_TPM_PT_OUT_BODY_SIZE, 0, desc); > - if (!rc) > - *value = be32_to_cpu(cmd.params.get_tpm_pt_out.value); > - > + rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_GET_CAPABILITY); > + if (rc) > + return rc; > + tpm_buf_append_u32(&buf, TPM2_CAP_TPM_PROPERTIES); > + tpm_buf_append_u32(&buf, property_id); > + tpm_buf_append_u32(&buf, 1); > + rc = tpm_transmit_cmd(chip, NULL, buf.data, PAGE_SIZE, 0, 0, NULL); > + if (!rc) { > + out = (struct tpm2_get_cap_out *) > + &buf.data[TPM_HEADER_SIZE]; > + *value = be32_to_cpu(out->value); > + } > + tpm_buf_destroy(&buf); > return rc; > } > EXPORT_SYMBOL_GPL(tpm2_get_tpm_pt);
| |