[tpmdd-devel,v6,2/3] tpm: vtpm_proxy: Implement request_locality function.

Submitted by Stefan Berger on May 24, 2017, 9:39 p.m.

Details

Message ID 1495661981-27249-3-git-send-email-stefanb@linux.vnet.ibm.com
State New
Headers show

Commit Message

Stefan Berger May 24, 2017, 9:39 p.m.
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.

To avoid recursing into requesting the locality, we set the
TPM_TRANSMIT_RAW flag when calling tpm_transmit_cmd. To avoid recursing
into TPM 2 space related commands, we set the space parameter to NULL.

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
---
 drivers/char/tpm/tpm-interface.c  |  1 +
 drivers/char/tpm/tpm_vtpm_proxy.c | 36 ++++++++++++++++++++++++++++++++++++
 include/uapi/linux/vtpm_proxy.h   |  4 ++++
 3 files changed, 41 insertions(+)

Comments

Jarkko Sakkinen May 24, 2017, 10:21 p.m.
On Wed, May 24, 2017 at 05:39:40PM -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.
> 
> To avoid recursing into requesting the locality, we set the
> TPM_TRANSMIT_RAW flag when calling tpm_transmit_cmd. To avoid recursing
> into TPM 2 space related commands, we set the space parameter to NULL.
> 
> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
> ---
>  drivers/char/tpm/tpm-interface.c  |  1 +
>  drivers/char/tpm/tpm_vtpm_proxy.c | 36 ++++++++++++++++++++++++++++++++++++
>  include/uapi/linux/vtpm_proxy.h   |  4 ++++
>  3 files changed, 41 insertions(+)
> 
> diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
> index 2eacda2..876d45f 100644
> --- a/drivers/char/tpm/tpm-interface.c
> +++ b/drivers/char/tpm/tpm-interface.c
> @@ -537,6 +537,7 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_space *space,
>  
>  	return 0;
>  }
> +EXPORT_SYMBOL_GPL(tpm_transmit_cmd);
>  
>  #define TPM_DIGEST_SIZE 20
>  #define TPM_RET_CODE_IDX 6
> diff --git a/drivers/char/tpm/tpm_vtpm_proxy.c b/drivers/char/tpm/tpm_vtpm_proxy.c
> index 751059d..66024bf 100644
> --- a/drivers/char/tpm/tpm_vtpm_proxy.c
> +++ b/drivers/char/tpm/tpm_vtpm_proxy.c
> @@ -371,6 +371,41 @@ 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);

I would always go with this branch.

> +	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_transmit_cmd(chip, NULL, buf.data, tpm_buf_length(&buf), 0,
> +			      TPM_TRANSMIT_UNLOCKED | TPM_TRANSMIT_RAW,
> +			      "attempting to set locality");
> +	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 +415,7 @@ 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..58ac73c 100644
> --- a/include/uapi/linux/vtpm_proxy.h
> +++ b/include/uapi/linux/vtpm_proxy.h
> @@ -46,4 +46,8 @@ 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

What practical benefit you get from these two constants? I understand
the value range but not so much the redundant code.

/Jarkko

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Stefan Berger May 24, 2017, 11:03 p.m.
On 05/24/2017 06:21 PM, Jarkko Sakkinen wrote:
> On Wed, May 24, 2017 at 05:39:40PM -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.
>>
>> To avoid recursing into requesting the locality, we set the
>> TPM_TRANSMIT_RAW flag when calling tpm_transmit_cmd. To avoid recursing
>> into TPM 2 space related commands, we set the space parameter to NULL.
>>
>> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
>> ---
>>   drivers/char/tpm/tpm-interface.c  |  1 +
>>   drivers/char/tpm/tpm_vtpm_proxy.c | 36 ++++++++++++++++++++++++++++++++++++
>>   include/uapi/linux/vtpm_proxy.h   |  4 ++++
>>   3 files changed, 41 insertions(+)
>>
>> diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
>> index 2eacda2..876d45f 100644
>> --- a/drivers/char/tpm/tpm-interface.c
>> +++ b/drivers/char/tpm/tpm-interface.c
>> @@ -537,6 +537,7 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_space *space,
>>   
>>   	return 0;
>>   }
>> +EXPORT_SYMBOL_GPL(tpm_transmit_cmd);
>>   
>>   #define TPM_DIGEST_SIZE 20
>>   #define TPM_RET_CODE_IDX 6
>> diff --git a/drivers/char/tpm/tpm_vtpm_proxy.c b/drivers/char/tpm/tpm_vtpm_proxy.c
>> index 751059d..66024bf 100644
>> --- a/drivers/char/tpm/tpm_vtpm_proxy.c
>> +++ b/drivers/char/tpm/tpm_vtpm_proxy.c
>> @@ -371,6 +371,41 @@ 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);
> I would always go with this branch.
>
>> +	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_transmit_cmd(chip, NULL, buf.data, tpm_buf_length(&buf), 0,
>> +			      TPM_TRANSMIT_UNLOCKED | TPM_TRANSMIT_RAW,
>> +			      "attempting to set locality");
>> +	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 +415,7 @@ 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..58ac73c 100644
>> --- a/include/uapi/linux/vtpm_proxy.h
>> +++ b/include/uapi/linux/vtpm_proxy.h
>> @@ -46,4 +46,8 @@ 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
> What practical benefit you get from these two constants? I understand
> the value range but not so much the redundant code.

If you want to change this, please go ahead and give it a sinle name.
For the code branches above I think that we should at least send a TPM 
1.2 formatted command in case of TPM 1.2 and a TPM 2 formatted one in 
case of TPM 2. It seems just 'proper.'

    Stefan


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Jarkko Sakkinen May 25, 2017, 12:09 a.m.
On Wed, May 24, 2017 at 07:03:27PM -0400, Stefan Berger wrote:
> On 05/24/2017 06:21 PM, Jarkko Sakkinen wrote:
> > On Wed, May 24, 2017 at 05:39:40PM -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.
> > > 
> > > To avoid recursing into requesting the locality, we set the
> > > TPM_TRANSMIT_RAW flag when calling tpm_transmit_cmd. To avoid recursing
> > > into TPM 2 space related commands, we set the space parameter to NULL.
> > > 
> > > Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
> > > ---
> > >   drivers/char/tpm/tpm-interface.c  |  1 +
> > >   drivers/char/tpm/tpm_vtpm_proxy.c | 36 ++++++++++++++++++++++++++++++++++++
> > >   include/uapi/linux/vtpm_proxy.h   |  4 ++++
> > >   3 files changed, 41 insertions(+)
> > > 
> > > diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
> > > index 2eacda2..876d45f 100644
> > > --- a/drivers/char/tpm/tpm-interface.c
> > > +++ b/drivers/char/tpm/tpm-interface.c
> > > @@ -537,6 +537,7 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_space *space,
> > >   	return 0;
> > >   }
> > > +EXPORT_SYMBOL_GPL(tpm_transmit_cmd);
> > >   #define TPM_DIGEST_SIZE 20
> > >   #define TPM_RET_CODE_IDX 6
> > > diff --git a/drivers/char/tpm/tpm_vtpm_proxy.c b/drivers/char/tpm/tpm_vtpm_proxy.c
> > > index 751059d..66024bf 100644
> > > --- a/drivers/char/tpm/tpm_vtpm_proxy.c
> > > +++ b/drivers/char/tpm/tpm_vtpm_proxy.c
> > > @@ -371,6 +371,41 @@ 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);
> > I would always go with this branch.
> > 
> > > +	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_transmit_cmd(chip, NULL, buf.data, tpm_buf_length(&buf), 0,
> > > +			      TPM_TRANSMIT_UNLOCKED | TPM_TRANSMIT_RAW,
> > > +			      "attempting to set locality");
> > > +	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 +415,7 @@ 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..58ac73c 100644
> > > --- a/include/uapi/linux/vtpm_proxy.h
> > > +++ b/include/uapi/linux/vtpm_proxy.h
> > > @@ -46,4 +46,8 @@ 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
> > What practical benefit you get from these two constants? I understand
> > the value range but not so much the redundant code.
> 
> If you want to change this, please go ahead and give it a sinle name.
> For the code branches above I think that we should at least send a TPM 1.2
> formatted command in case of TPM 1.2 and a TPM 2 formatted one in case of
> TPM 2. It seems just 'proper.'
> 
>    Stefan

Agreed. I will make these changes no need to send new series.

Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

/Jarkko

------------------------------------------------------------------------------
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Stefan Berger June 2, 2017, 12:34 a.m.
On 05/24/2017 08:09 PM, Jarkko Sakkinen wrote:
> On Wed, May 24, 2017 at 07:03:27PM -0400, Stefan Berger wrote:
>> On 05/24/2017 06:21 PM, Jarkko Sakkinen wrote:
>>> On Wed, May 24, 2017 at 05:39:40PM -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.
>>>>
>>>> To avoid recursing into requesting the locality, we set the
>>>> TPM_TRANSMIT_RAW flag when calling tpm_transmit_cmd. To avoid recursing
>>>> into TPM 2 space related commands, we set the space parameter to NULL.
>>>>
>>>> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
>>>> ---
>>>>    drivers/char/tpm/tpm-interface.c  |  1 +
>>>>    drivers/char/tpm/tpm_vtpm_proxy.c | 36 ++++++++++++++++++++++++++++++++++++
>>>>    include/uapi/linux/vtpm_proxy.h   |  4 ++++
>>>>    3 files changed, 41 insertions(+)
>>>>
>>>> diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
>>>> index 2eacda2..876d45f 100644
>>>> --- a/drivers/char/tpm/tpm-interface.c
>>>> +++ b/drivers/char/tpm/tpm-interface.c
>>>> @@ -537,6 +537,7 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_space *space,
>>>>    	return 0;
>>>>    }
>>>> +EXPORT_SYMBOL_GPL(tpm_transmit_cmd);
>>>>    #define TPM_DIGEST_SIZE 20
>>>>    #define TPM_RET_CODE_IDX 6
>>>> diff --git a/drivers/char/tpm/tpm_vtpm_proxy.c b/drivers/char/tpm/tpm_vtpm_proxy.c
>>>> index 751059d..66024bf 100644
>>>> --- a/drivers/char/tpm/tpm_vtpm_proxy.c
>>>> +++ b/drivers/char/tpm/tpm_vtpm_proxy.c
>>>> @@ -371,6 +371,41 @@ 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);
>>> I would always go with this branch.
>>>
>>>> +	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_transmit_cmd(chip, NULL, buf.data, tpm_buf_length(&buf), 0,
>>>> +			      TPM_TRANSMIT_UNLOCKED | TPM_TRANSMIT_RAW,
>>>> +			      "attempting to set locality");
>>>> +	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 +415,7 @@ 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..58ac73c 100644
>>>> --- a/include/uapi/linux/vtpm_proxy.h
>>>> +++ b/include/uapi/linux/vtpm_proxy.h
>>>> @@ -46,4 +46,8 @@ 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
>>> What practical benefit you get from these two constants? I understand
>>> the value range but not so much the redundant code.
>> If you want to change this, please go ahead and give it a sinle name.
>> For the code branches above I think that we should at least send a TPM 1.2
>> formatted command in case of TPM 1.2 and a TPM 2 formatted one in case of
>> TPM 2. It seems just 'proper.'
>>
>>     Stefan
> Agreed. I will make these changes no need to send new series.

I pushed an update to the test suite, which may help the cause to accept 
this series.

https://github.com/stefanberger/linux-vtpm-tests

Patch 3/3 should probably not return -EFAULT in case of the user trying 
to send the SetLocality command via /dev/tpm%d but rather -EPIPE to get 
the logging of the error suppressed, even though that doesn't seem to be 
the right error code.


   Stefan

>
> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
>
> /Jarkko
>


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Jarkko Sakkinen June 4, 2017, 3:43 p.m.
On Thu, Jun 01, 2017 at 08:34:31PM -0400, Stefan Berger wrote:
> On 05/24/2017 08:09 PM, Jarkko Sakkinen wrote:
> > On Wed, May 24, 2017 at 07:03:27PM -0400, Stefan Berger wrote:
> > > On 05/24/2017 06:21 PM, Jarkko Sakkinen wrote:
> > > > On Wed, May 24, 2017 at 05:39:40PM -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.
> > > > > 
> > > > > To avoid recursing into requesting the locality, we set the
> > > > > TPM_TRANSMIT_RAW flag when calling tpm_transmit_cmd. To avoid recursing
> > > > > into TPM 2 space related commands, we set the space parameter to NULL.
> > > > > 
> > > > > Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
> > > > > ---
> > > > >    drivers/char/tpm/tpm-interface.c  |  1 +
> > > > >    drivers/char/tpm/tpm_vtpm_proxy.c | 36 ++++++++++++++++++++++++++++++++++++
> > > > >    include/uapi/linux/vtpm_proxy.h   |  4 ++++
> > > > >    3 files changed, 41 insertions(+)
> > > > > 
> > > > > diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
> > > > > index 2eacda2..876d45f 100644
> > > > > --- a/drivers/char/tpm/tpm-interface.c
> > > > > +++ b/drivers/char/tpm/tpm-interface.c
> > > > > @@ -537,6 +537,7 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_space *space,
> > > > >    	return 0;
> > > > >    }
> > > > > +EXPORT_SYMBOL_GPL(tpm_transmit_cmd);
> > > > >    #define TPM_DIGEST_SIZE 20
> > > > >    #define TPM_RET_CODE_IDX 6
> > > > > diff --git a/drivers/char/tpm/tpm_vtpm_proxy.c b/drivers/char/tpm/tpm_vtpm_proxy.c
> > > > > index 751059d..66024bf 100644
> > > > > --- a/drivers/char/tpm/tpm_vtpm_proxy.c
> > > > > +++ b/drivers/char/tpm/tpm_vtpm_proxy.c
> > > > > @@ -371,6 +371,41 @@ 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);
> > > > I would always go with this branch.
> > > > 
> > > > > +	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_transmit_cmd(chip, NULL, buf.data, tpm_buf_length(&buf), 0,
> > > > > +			      TPM_TRANSMIT_UNLOCKED | TPM_TRANSMIT_RAW,
> > > > > +			      "attempting to set locality");
> > > > > +	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 +415,7 @@ 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..58ac73c 100644
> > > > > --- a/include/uapi/linux/vtpm_proxy.h
> > > > > +++ b/include/uapi/linux/vtpm_proxy.h
> > > > > @@ -46,4 +46,8 @@ 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
> > > > What practical benefit you get from these two constants? I understand
> > > > the value range but not so much the redundant code.
> > > If you want to change this, please go ahead and give it a sinle name.
> > > For the code branches above I think that we should at least send a TPM 1.2
> > > formatted command in case of TPM 1.2 and a TPM 2 formatted one in case of
> > > TPM 2. It seems just 'proper.'
> > > 
> > >     Stefan
> > Agreed. I will make these changes no need to send new series.
> 
> I pushed an update to the test suite, which may help the cause to accept
> this series.
> 
> https://github.com/stefanberger/linux-vtpm-tests
> 
> Patch 3/3 should probably not return -EFAULT in case of the user trying to
> send the SetLocality command via /dev/tpm%d but rather -EPIPE to get the
> logging of the error suppressed, even though that doesn't seem to be the
> right error code.
> 
> 
>   Stefan
> 
> > 
> > Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
> > 
> > /Jarkko
> > 

On hold as there are more high priority bug fixes in the queue.

/Jarkko

------------------------------------------------------------------------------
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Jarkko Sakkinen June 4, 2017, 4:27 p.m.
On Sun, Jun 04, 2017 at 06:43:32PM +0300, Jarkko Sakkinen wrote:
> On Thu, Jun 01, 2017 at 08:34:31PM -0400, Stefan Berger wrote:
> > On 05/24/2017 08:09 PM, Jarkko Sakkinen wrote:
> > > On Wed, May 24, 2017 at 07:03:27PM -0400, Stefan Berger wrote:
> > > > On 05/24/2017 06:21 PM, Jarkko Sakkinen wrote:
> > > > > On Wed, May 24, 2017 at 05:39:40PM -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.
> > > > > > 
> > > > > > To avoid recursing into requesting the locality, we set the
> > > > > > TPM_TRANSMIT_RAW flag when calling tpm_transmit_cmd. To avoid recursing
> > > > > > into TPM 2 space related commands, we set the space parameter to NULL.
> > > > > > 
> > > > > > Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
> > > > > > ---
> > > > > >    drivers/char/tpm/tpm-interface.c  |  1 +
> > > > > >    drivers/char/tpm/tpm_vtpm_proxy.c | 36 ++++++++++++++++++++++++++++++++++++
> > > > > >    include/uapi/linux/vtpm_proxy.h   |  4 ++++
> > > > > >    3 files changed, 41 insertions(+)
> > > > > > 
> > > > > > diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
> > > > > > index 2eacda2..876d45f 100644
> > > > > > --- a/drivers/char/tpm/tpm-interface.c
> > > > > > +++ b/drivers/char/tpm/tpm-interface.c
> > > > > > @@ -537,6 +537,7 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_space *space,
> > > > > >    	return 0;
> > > > > >    }
> > > > > > +EXPORT_SYMBOL_GPL(tpm_transmit_cmd);
> > > > > >    #define TPM_DIGEST_SIZE 20
> > > > > >    #define TPM_RET_CODE_IDX 6
> > > > > > diff --git a/drivers/char/tpm/tpm_vtpm_proxy.c b/drivers/char/tpm/tpm_vtpm_proxy.c
> > > > > > index 751059d..66024bf 100644
> > > > > > --- a/drivers/char/tpm/tpm_vtpm_proxy.c
> > > > > > +++ b/drivers/char/tpm/tpm_vtpm_proxy.c
> > > > > > @@ -371,6 +371,41 @@ 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);
> > > > > I would always go with this branch.
> > > > > 
> > > > > > +	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_transmit_cmd(chip, NULL, buf.data, tpm_buf_length(&buf), 0,
> > > > > > +			      TPM_TRANSMIT_UNLOCKED | TPM_TRANSMIT_RAW,
> > > > > > +			      "attempting to set locality");
> > > > > > +	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 +415,7 @@ 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..58ac73c 100644
> > > > > > --- a/include/uapi/linux/vtpm_proxy.h
> > > > > > +++ b/include/uapi/linux/vtpm_proxy.h
> > > > > > @@ -46,4 +46,8 @@ 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
> > > > > What practical benefit you get from these two constants? I understand
> > > > > the value range but not so much the redundant code.
> > > > If you want to change this, please go ahead and give it a sinle name.
> > > > For the code branches above I think that we should at least send a TPM 1.2
> > > > formatted command in case of TPM 1.2 and a TPM 2 formatted one in case of
> > > > TPM 2. It seems just 'proper.'
> > > > 
> > > >     Stefan
> > > Agreed. I will make these changes no need to send new series.
> > 
> > I pushed an update to the test suite, which may help the cause to accept
> > this series.
> > 
> > https://github.com/stefanberger/linux-vtpm-tests
> > 
> > Patch 3/3 should probably not return -EFAULT in case of the user trying to
> > send the SetLocality command via /dev/tpm%d but rather -EPIPE to get the
> > logging of the error suppressed, even though that doesn't seem to be the
> > right error code.
> > 
> > 
> >   Stefan
> > 
> > > 
> > > Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
> > > 
> > > /Jarkko
> > > 
> 
> On hold as there are more high priority bug fixes in the queue.
> 
> /Jarkko

Patches are now applied to master (bleeding edge) brach. After they are
tested they can be put also to the next branch.

/Jarkko

------------------------------------------------------------------------------
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engaging tech sites, Slashdot.org! http://sdm.link/slashdot
Stefan Berger June 4, 2017, 8:09 p.m.
On 06/04/2017 12:27 PM, Jarkko Sakkinen wrote:
> On Sun, Jun 04, 2017 at 06:43:32PM +0300, Jarkko Sakkinen wrote:
>> On Thu, Jun 01, 2017 at 08:34:31PM -0400, Stefan Berger wrote:
>>> On 05/24/2017 08:09 PM, Jarkko Sakkinen wrote:
>>>> On Wed, May 24, 2017 at 07:03:27PM -0400, Stefan Berger wrote:
>>>>> On 05/24/2017 06:21 PM, Jarkko Sakkinen wrote:
>>>>>> On Wed, May 24, 2017 at 05:39:40PM -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.
>>>>>>>
>>>>>>> To avoid recursing into requesting the locality, we set the
>>>>>>> TPM_TRANSMIT_RAW flag when calling tpm_transmit_cmd. To avoid recursing
>>>>>>> into TPM 2 space related commands, we set the space parameter to NULL.
>>>>>>>
>>>>>>> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
>>>>>>> ---
>>>>>>>     drivers/char/tpm/tpm-interface.c  |  1 +
>>>>>>>     drivers/char/tpm/tpm_vtpm_proxy.c | 36 ++++++++++++++++++++++++++++++++++++
>>>>>>>     include/uapi/linux/vtpm_proxy.h   |  4 ++++
>>>>>>>     3 files changed, 41 insertions(+)
>>>>>>>
>>>>>>> diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
>>>>>>> index 2eacda2..876d45f 100644
>>>>>>> --- a/drivers/char/tpm/tpm-interface.c
>>>>>>> +++ b/drivers/char/tpm/tpm-interface.c
>>>>>>> @@ -537,6 +537,7 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_space *space,
>>>>>>>     	return 0;
>>>>>>>     }
>>>>>>> +EXPORT_SYMBOL_GPL(tpm_transmit_cmd);
>>>>>>>     #define TPM_DIGEST_SIZE 20
>>>>>>>     #define TPM_RET_CODE_IDX 6
>>>>>>> diff --git a/drivers/char/tpm/tpm_vtpm_proxy.c b/drivers/char/tpm/tpm_vtpm_proxy.c
>>>>>>> index 751059d..66024bf 100644
>>>>>>> --- a/drivers/char/tpm/tpm_vtpm_proxy.c
>>>>>>> +++ b/drivers/char/tpm/tpm_vtpm_proxy.c
>>>>>>> @@ -371,6 +371,41 @@ 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);
>>>>>> I would always go with this branch.
>>>>>>
>>>>>>> +	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_transmit_cmd(chip, NULL, buf.data, tpm_buf_length(&buf), 0,
>>>>>>> +			      TPM_TRANSMIT_UNLOCKED | TPM_TRANSMIT_RAW,
>>>>>>> +			      "attempting to set locality");
>>>>>>> +	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 +415,7 @@ 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..58ac73c 100644
>>>>>>> --- a/include/uapi/linux/vtpm_proxy.h
>>>>>>> +++ b/include/uapi/linux/vtpm_proxy.h
>>>>>>> @@ -46,4 +46,8 @@ 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
>>>>>> What practical benefit you get from these two constants? I understand
>>>>>> the value range but not so much the redundant code.
>>>>> If you want to change this, please go ahead and give it a sinle name.
>>>>> For the code branches above I think that we should at least send a TPM 1.2
>>>>> formatted command in case of TPM 1.2 and a TPM 2 formatted one in case of
>>>>> TPM 2. It seems just 'proper.'
>>>>>
>>>>>      Stefan
>>>> Agreed. I will make these changes no need to send new series.
>>> I pushed an update to the test suite, which may help the cause to accept
>>> this series.
>>>
>>> https://github.com/stefanberger/linux-vtpm-tests
>>>
>>> Patch 3/3 should probably not return -EFAULT in case of the user trying to
>>> send the SetLocality command via /dev/tpm%d but rather -EPIPE to get the
>>> logging of the error suppressed, even though that doesn't seem to be the
>>> right error code.
>>>
>>>
>>>    Stefan
>>>
>>>> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
>>>>
>>>> /Jarkko
>>>>
>> On hold as there are more high priority bug fixes in the queue.
>>
>> /Jarkko
> Patches are now applied to master (bleeding edge) brach. After they are
> tested they can be put also to the next branch.

Thanks. Pulled and tested.

Tested-by: Stefan Berger <stefanb@linux.vnet.ibm.com>


------------------------------------------------------------------------------
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Patch hide | download patch | download mbox

diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index 2eacda2..876d45f 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -537,6 +537,7 @@  ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_space *space,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(tpm_transmit_cmd);
 
 #define TPM_DIGEST_SIZE 20
 #define TPM_RET_CODE_IDX 6
diff --git a/drivers/char/tpm/tpm_vtpm_proxy.c b/drivers/char/tpm/tpm_vtpm_proxy.c
index 751059d..66024bf 100644
--- a/drivers/char/tpm/tpm_vtpm_proxy.c
+++ b/drivers/char/tpm/tpm_vtpm_proxy.c
@@ -371,6 +371,41 @@  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_transmit_cmd(chip, NULL, buf.data, tpm_buf_length(&buf), 0,
+			      TPM_TRANSMIT_UNLOCKED | TPM_TRANSMIT_RAW,
+			      "attempting to set locality");
+	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 +415,7 @@  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..58ac73c 100644
--- a/include/uapi/linux/vtpm_proxy.h
+++ b/include/uapi/linux/vtpm_proxy.h
@@ -46,4 +46,8 @@  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 */