* [PATCH RESEND] tpm: Restore functionality to xen vtpm driver.
@ 2018-09-13 19:47 Boris Ostrovsky
2018-09-13 20:20 ` Jason Gunthorpe
` (3 more replies)
0 siblings, 4 replies; 6+ messages in thread
From: Boris Ostrovsky @ 2018-09-13 19:47 UTC (permalink / raw)
To: peterhuewe, jarkko.sakkinen, jgg
Cc: linux-integrity, linux-kernel, xen-devel, jgross, dunlapg,
Dr. Greg Wettstein, Dr . Greg Wettstein, Boris Ostrovsky, stable
From: "Dr. Greg Wettstein" <greg@wind.enjellic.com>
Functionality of the xen-tpmfront driver was lost secondary to
the introduction of xenbus multi-page support in commit ccc9d90a9a8b
("xenbus_client: Extend interface to support multi-page ring").
In this commit a pointer to the shared page address was being
passed to the xenbus_grant_ring() function rather then the
address of the shared page itself. This resulted in a situation
where the driver would attach to the vtpm-stubdom but any attempt
to send a command to the stub domain would timeout.
A diagnostic finding for this regression is the following error
message being generated when the xen-tpmfront driver probes for a
device:
<3>vtpm vtpm-0: tpm_transmit: tpm_send: error -62
<3>vtpm vtpm-0: A TPM error (-62) occurred attempting to determine
the timeouts
This fix is relevant to all kernels from 4.1 forward which is the
release in which multi-page xenbus support was introduced.
Daniel De Graaf formulated the fix by code inspection after the
regression point was located.
Signed-off-by: Dr. Greg Wettstein <greg@enjellic.com>
[boris: fixed commit message formatting]
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: stable@vger.kernel.org # v4.1+
---
We've lost this patch a couple of years ago, re-submitting.
drivers/char/tpm/xen-tpmfront.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/char/tpm/xen-tpmfront.c b/drivers/char/tpm/xen-tpmfront.c
index 911475d36800..b150f87f38f5 100644
--- a/drivers/char/tpm/xen-tpmfront.c
+++ b/drivers/char/tpm/xen-tpmfront.c
@@ -264,7 +264,7 @@ static int setup_ring(struct xenbus_device *dev, struct tpm_private *priv)
return -ENOMEM;
}
- rv = xenbus_grant_ring(dev, &priv->shr, 1, &gref);
+ rv = xenbus_grant_ring(dev, priv->shr, 1, &gref);
if (rv < 0)
return rv;
--
2.17.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH RESEND] tpm: Restore functionality to xen vtpm driver.
2018-09-13 19:47 [PATCH RESEND] tpm: Restore functionality to xen vtpm driver Boris Ostrovsky
2018-09-13 20:20 ` Jason Gunthorpe
@ 2018-09-13 20:20 ` Jason Gunthorpe
2018-09-16 19:20 ` Jarkko Sakkinen
2018-09-16 19:20 ` Jarkko Sakkinen
3 siblings, 0 replies; 6+ messages in thread
From: Jason Gunthorpe @ 2018-09-13 20:20 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: peterhuewe, jarkko.sakkinen, linux-integrity, linux-kernel,
xen-devel, jgross, dunlapg, Dr. Greg Wettstein,
Dr . Greg Wettstein, stable
On Thu, Sep 13, 2018 at 03:47:49PM -0400, Boris Ostrovsky wrote:
> From: "Dr. Greg Wettstein" <greg@wind.enjellic.com>
>
> Functionality of the xen-tpmfront driver was lost secondary to
> the introduction of xenbus multi-page support in commit ccc9d90a9a8b
> ("xenbus_client: Extend interface to support multi-page ring").
This should be in a Fixes: line..
> In this commit a pointer to the shared page address was being
> passed to the xenbus_grant_ring() function rather then the
> address of the shared page itself. This resulted in a situation
> where the driver would attach to the vtpm-stubdom but any attempt
> to send a command to the stub domain would timeout.
>
> A diagnostic finding for this regression is the following error
> message being generated when the xen-tpmfront driver probes for a
> device:
>
> <3>vtpm vtpm-0: tpm_transmit: tpm_send: error -62
>
> <3>vtpm vtpm-0: A TPM error (-62) occurred attempting to determine
> the timeouts
>
> This fix is relevant to all kernels from 4.1 forward which is the
> release in which multi-page xenbus support was introduced.
>
> Daniel De Graaf formulated the fix by code inspection after the
> regression point was located.
>
> Signed-off-by: Dr. Greg Wettstein <greg@enjellic.com>
>
> [boris: fixed commit message formatting]
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> Cc: stable@vger.kernel.org # v4.1+
> We've lost this patch a couple of years ago, re-submitting.
>
>
> drivers/char/tpm/xen-tpmfront.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/char/tpm/xen-tpmfront.c b/drivers/char/tpm/xen-tpmfront.c
> index 911475d36800..b150f87f38f5 100644
> +++ b/drivers/char/tpm/xen-tpmfront.c
> @@ -264,7 +264,7 @@ static int setup_ring(struct xenbus_device *dev, struct tpm_private *priv)
> return -ENOMEM;
> }
>
> - rv = xenbus_grant_ring(dev, &priv->shr, 1, &gref);
> + rv = xenbus_grant_ring(dev, priv->shr, 1, &gref);
> if (rv < 0)
> return rv;
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH RESEND] tpm: Restore functionality to xen vtpm driver.
2018-09-13 19:47 [PATCH RESEND] tpm: Restore functionality to xen vtpm driver Boris Ostrovsky
@ 2018-09-13 20:20 ` Jason Gunthorpe
2018-09-13 20:20 ` Jason Gunthorpe
` (2 subsequent siblings)
3 siblings, 0 replies; 6+ messages in thread
From: Jason Gunthorpe @ 2018-09-13 20:20 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: jgross, Dr . Greg Wettstein, dunlapg, linux-kernel,
jarkko.sakkinen, Dr. Greg Wettstein, stable, xen-devel,
peterhuewe, linux-integrity
On Thu, Sep 13, 2018 at 03:47:49PM -0400, Boris Ostrovsky wrote:
> From: "Dr. Greg Wettstein" <greg@wind.enjellic.com>
>
> Functionality of the xen-tpmfront driver was lost secondary to
> the introduction of xenbus multi-page support in commit ccc9d90a9a8b
> ("xenbus_client: Extend interface to support multi-page ring").
This should be in a Fixes: line..
> In this commit a pointer to the shared page address was being
> passed to the xenbus_grant_ring() function rather then the
> address of the shared page itself. This resulted in a situation
> where the driver would attach to the vtpm-stubdom but any attempt
> to send a command to the stub domain would timeout.
>
> A diagnostic finding for this regression is the following error
> message being generated when the xen-tpmfront driver probes for a
> device:
>
> <3>vtpm vtpm-0: tpm_transmit: tpm_send: error -62
>
> <3>vtpm vtpm-0: A TPM error (-62) occurred attempting to determine
> the timeouts
>
> This fix is relevant to all kernels from 4.1 forward which is the
> release in which multi-page xenbus support was introduced.
>
> Daniel De Graaf formulated the fix by code inspection after the
> regression point was located.
>
> Signed-off-by: Dr. Greg Wettstein <greg@enjellic.com>
>
> [boris: fixed commit message formatting]
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> Cc: stable@vger.kernel.org # v4.1+
> We've lost this patch a couple of years ago, re-submitting.
>
>
> drivers/char/tpm/xen-tpmfront.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/char/tpm/xen-tpmfront.c b/drivers/char/tpm/xen-tpmfront.c
> index 911475d36800..b150f87f38f5 100644
> +++ b/drivers/char/tpm/xen-tpmfront.c
> @@ -264,7 +264,7 @@ static int setup_ring(struct xenbus_device *dev, struct tpm_private *priv)
> return -ENOMEM;
> }
>
> - rv = xenbus_grant_ring(dev, &priv->shr, 1, &gref);
> + rv = xenbus_grant_ring(dev, priv->shr, 1, &gref);
> if (rv < 0)
> return rv;
>
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH RESEND] tpm: Restore functionality to xen vtpm driver.
2018-09-13 19:47 [PATCH RESEND] tpm: Restore functionality to xen vtpm driver Boris Ostrovsky
2018-09-13 20:20 ` Jason Gunthorpe
2018-09-13 20:20 ` Jason Gunthorpe
@ 2018-09-16 19:20 ` Jarkko Sakkinen
2018-09-16 19:20 ` Jarkko Sakkinen
3 siblings, 0 replies; 6+ messages in thread
From: Jarkko Sakkinen @ 2018-09-16 19:20 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: peterhuewe, jgg, linux-integrity, linux-kernel, xen-devel,
jgross, dunlapg, Dr. Greg Wettstein, Dr . Greg Wettstein, stable
On Thu, Sep 13, 2018 at 03:47:49PM -0400, Boris Ostrovsky wrote:
> From: "Dr. Greg Wettstein" <greg@wind.enjellic.com>
>
> Functionality of the xen-tpmfront driver was lost secondary to
> the introduction of xenbus multi-page support in commit ccc9d90a9a8b
> ("xenbus_client: Extend interface to support multi-page ring").
>
> In this commit a pointer to the shared page address was being
> passed to the xenbus_grant_ring() function rather then the
> address of the shared page itself. This resulted in a situation
> where the driver would attach to the vtpm-stubdom but any attempt
> to send a command to the stub domain would timeout.
>
> A diagnostic finding for this regression is the following error
> message being generated when the xen-tpmfront driver probes for a
> device:
>
> <3>vtpm vtpm-0: tpm_transmit: tpm_send: error -62
>
> <3>vtpm vtpm-0: A TPM error (-62) occurred attempting to determine
> the timeouts
>
> This fix is relevant to all kernels from 4.1 forward which is the
> release in which multi-page xenbus support was introduced.
>
> Daniel De Graaf formulated the fix by code inspection after the
> regression point was located.
>
> Signed-off-by: Dr. Greg Wettstein <greg@enjellic.com>
>
> [boris: fixed commit message formatting]
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> Cc: stable@vger.kernel.org # v4.1+
> ---
> We've lost this patch a couple of years ago, re-submitting.
>
>
> drivers/char/tpm/xen-tpmfront.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/char/tpm/xen-tpmfront.c b/drivers/char/tpm/xen-tpmfront.c
> index 911475d36800..b150f87f38f5 100644
> --- a/drivers/char/tpm/xen-tpmfront.c
> +++ b/drivers/char/tpm/xen-tpmfront.c
> @@ -264,7 +264,7 @@ static int setup_ring(struct xenbus_device *dev, struct tpm_private *priv)
> return -ENOMEM;
> }
>
> - rv = xenbus_grant_ring(dev, &priv->shr, 1, &gref);
> + rv = xenbus_grant_ring(dev, priv->shr, 1, &gref);
> if (rv < 0)
> return rv;
>
> --
> 2.17.1
>
Please add the fixes-line. Thanks.
/Jarkko
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH RESEND] tpm: Restore functionality to xen vtpm driver.
2018-09-13 19:47 [PATCH RESEND] tpm: Restore functionality to xen vtpm driver Boris Ostrovsky
` (2 preceding siblings ...)
2018-09-16 19:20 ` Jarkko Sakkinen
@ 2018-09-16 19:20 ` Jarkko Sakkinen
3 siblings, 0 replies; 6+ messages in thread
From: Jarkko Sakkinen @ 2018-09-16 19:20 UTC (permalink / raw)
To: Boris Ostrovsky
Cc: jgross, Dr . Greg Wettstein, dunlapg, linux-kernel, stable, jgg,
Dr. Greg Wettstein, xen-devel, peterhuewe, linux-integrity
On Thu, Sep 13, 2018 at 03:47:49PM -0400, Boris Ostrovsky wrote:
> From: "Dr. Greg Wettstein" <greg@wind.enjellic.com>
>
> Functionality of the xen-tpmfront driver was lost secondary to
> the introduction of xenbus multi-page support in commit ccc9d90a9a8b
> ("xenbus_client: Extend interface to support multi-page ring").
>
> In this commit a pointer to the shared page address was being
> passed to the xenbus_grant_ring() function rather then the
> address of the shared page itself. This resulted in a situation
> where the driver would attach to the vtpm-stubdom but any attempt
> to send a command to the stub domain would timeout.
>
> A diagnostic finding for this regression is the following error
> message being generated when the xen-tpmfront driver probes for a
> device:
>
> <3>vtpm vtpm-0: tpm_transmit: tpm_send: error -62
>
> <3>vtpm vtpm-0: A TPM error (-62) occurred attempting to determine
> the timeouts
>
> This fix is relevant to all kernels from 4.1 forward which is the
> release in which multi-page xenbus support was introduced.
>
> Daniel De Graaf formulated the fix by code inspection after the
> regression point was located.
>
> Signed-off-by: Dr. Greg Wettstein <greg@enjellic.com>
>
> [boris: fixed commit message formatting]
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> Cc: stable@vger.kernel.org # v4.1+
> ---
> We've lost this patch a couple of years ago, re-submitting.
>
>
> drivers/char/tpm/xen-tpmfront.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/char/tpm/xen-tpmfront.c b/drivers/char/tpm/xen-tpmfront.c
> index 911475d36800..b150f87f38f5 100644
> --- a/drivers/char/tpm/xen-tpmfront.c
> +++ b/drivers/char/tpm/xen-tpmfront.c
> @@ -264,7 +264,7 @@ static int setup_ring(struct xenbus_device *dev, struct tpm_private *priv)
> return -ENOMEM;
> }
>
> - rv = xenbus_grant_ring(dev, &priv->shr, 1, &gref);
> + rv = xenbus_grant_ring(dev, priv->shr, 1, &gref);
> if (rv < 0)
> return rv;
>
> --
> 2.17.1
>
Please add the fixes-line. Thanks.
/Jarkko
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH RESEND] tpm: Restore functionality to xen vtpm driver.
@ 2018-09-13 19:47 Boris Ostrovsky
0 siblings, 0 replies; 6+ messages in thread
From: Boris Ostrovsky @ 2018-09-13 19:47 UTC (permalink / raw)
To: peterhuewe, jarkko.sakkinen, jgg
Cc: jgross, Dr . Greg Wettstein, dunlapg, linux-kernel, stable,
Dr. Greg Wettstein, xen-devel, linux-integrity, Boris Ostrovsky
From: "Dr. Greg Wettstein" <greg@wind.enjellic.com>
Functionality of the xen-tpmfront driver was lost secondary to
the introduction of xenbus multi-page support in commit ccc9d90a9a8b
("xenbus_client: Extend interface to support multi-page ring").
In this commit a pointer to the shared page address was being
passed to the xenbus_grant_ring() function rather then the
address of the shared page itself. This resulted in a situation
where the driver would attach to the vtpm-stubdom but any attempt
to send a command to the stub domain would timeout.
A diagnostic finding for this regression is the following error
message being generated when the xen-tpmfront driver probes for a
device:
<3>vtpm vtpm-0: tpm_transmit: tpm_send: error -62
<3>vtpm vtpm-0: A TPM error (-62) occurred attempting to determine
the timeouts
This fix is relevant to all kernels from 4.1 forward which is the
release in which multi-page xenbus support was introduced.
Daniel De Graaf formulated the fix by code inspection after the
regression point was located.
Signed-off-by: Dr. Greg Wettstein <greg@enjellic.com>
[boris: fixed commit message formatting]
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: stable@vger.kernel.org # v4.1+
---
We've lost this patch a couple of years ago, re-submitting.
drivers/char/tpm/xen-tpmfront.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/char/tpm/xen-tpmfront.c b/drivers/char/tpm/xen-tpmfront.c
index 911475d36800..b150f87f38f5 100644
--- a/drivers/char/tpm/xen-tpmfront.c
+++ b/drivers/char/tpm/xen-tpmfront.c
@@ -264,7 +264,7 @@ static int setup_ring(struct xenbus_device *dev, struct tpm_private *priv)
return -ENOMEM;
}
- rv = xenbus_grant_ring(dev, &priv->shr, 1, &gref);
+ rv = xenbus_grant_ring(dev, priv->shr, 1, &gref);
if (rv < 0)
return rv;
--
2.17.1
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
^ permalink raw reply related [flat|nested] 6+ messages in thread
end of thread, other threads:[~2018-09-16 19:20 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-09-13 19:47 [PATCH RESEND] tpm: Restore functionality to xen vtpm driver Boris Ostrovsky
2018-09-13 20:20 ` Jason Gunthorpe
2018-09-13 20:20 ` Jason Gunthorpe
2018-09-16 19:20 ` Jarkko Sakkinen
2018-09-16 19:20 ` Jarkko Sakkinen
2018-09-13 19:47 Boris Ostrovsky
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