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Groups > linux.kernel > #1381939
| From | Stefan Berger <stefanb@linux.vnet.ibm.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v11 2/4] tpm: Introduce TPM_CHIP_FLAG_VIRTUAL |
| Date | 2016-04-18 19:30 +0200 |
| Message-ID | <rpl9M-Ut-19@gated-at.bofh.it> (permalink) |
| References | <rpl9L-Ut-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Introduce TPM_CHIP_FLAG_VIRTUAL to be used when the chip device has no
parent device.
Prevent sysfs entries requiring a parent device from being created.
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
---
drivers/char/tpm/tpm-chip.c | 7 +++++--
drivers/char/tpm/tpm.h | 1 +
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
index 7e2c9cf..a12db8e 100644
--- a/drivers/char/tpm/tpm-chip.c
+++ b/drivers/char/tpm/tpm-chip.c
@@ -181,6 +181,9 @@ struct tpm_chip *tpm_chip_alloc(struct device *dev,
if (rc)
goto out;
+ if (!dev)
+ chip->flags |= TPM_CHIP_FLAG_VIRTUAL;
+
cdev_init(&chip->cdev, &tpm_fops);
chip->cdev.owner = THIS_MODULE;
chip->cdev.kobj.parent = &chip->dev.kobj;
@@ -297,7 +300,7 @@ static void tpm_del_legacy_sysfs(struct tpm_chip *chip)
{
struct attribute **i;
- if (chip->flags & TPM_CHIP_FLAG_TPM2)
+ if (chip->flags & (TPM_CHIP_FLAG_TPM2 | TPM_CHIP_FLAG_VIRTUAL))
return;
sysfs_remove_link(&chip->dev.parent->kobj, "ppi");
@@ -315,7 +318,7 @@ static int tpm_add_legacy_sysfs(struct tpm_chip *chip)
struct attribute **i;
int rc;
- if (chip->flags & TPM_CHIP_FLAG_TPM2)
+ if (chip->flags & (TPM_CHIP_FLAG_TPM2 | TPM_CHIP_FLAG_VIRTUAL))
return 0;
rc = __compat_only_sysfs_link_entry_to_kobj(
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 508e8e0..ff4e53c 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -138,6 +138,7 @@ enum tpm_chip_flags {
TPM_CHIP_FLAG_REGISTERED = BIT(0),
TPM_CHIP_FLAG_TPM2 = BIT(1),
TPM_CHIP_FLAG_IRQ = BIT(2),
+ TPM_CHIP_FLAG_VIRTUAL = BIT(3),
};
struct tpm_chip {
--
2.4.3
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[PATCH v11 0/4] Multi-instance vTPM proxy driver Stefan Berger <stefanb@linux.vnet.ibm.com> - 2016-04-18 19:30 +0200
[PATCH v11 1/4] tpm: Remove all uses of drvdata from the TPM Core Stefan Berger <stefanb@linux.vnet.ibm.com> - 2016-04-18 19:30 +0200
Re: [PATCH v11 1/4] tpm: Remove all uses of drvdata from the TPM Core Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-04-19 12:20 +0200
Re: [PATCH v11 1/4] tpm: Remove all uses of drvdata from the TPM Core Stefan Berger <stefanb@linux.vnet.ibm.com> - 2016-04-19 12:40 +0200
Re: [PATCH v11 1/4] tpm: Remove all uses of drvdata from the TPM Core Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-04-19 19:10 +0200
Re: [PATCH v11 1/4] tpm: Remove all uses of drvdata from the TPM Core Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-04-20 07:40 +0200
Re: [PATCH v11 1/4] tpm: Remove all uses of drvdata from the TPM Core Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-04-19 19:30 +0200
Re: [PATCH v11 1/4] tpm: Remove all uses of drvdata from the TPM Core Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-04-22 17:10 +0200
Re: [PATCH v11 1/4] tpm: Remove all uses of drvdata from the TPM Core Stefan Berger <stefanb@linux.vnet.ibm.com> - 2016-04-25 21:20 +0200
[PATCH v11 4/4] tpm: Add documentation for the tpm_vtpm_proxy device driver Stefan Berger <stefanb@linux.vnet.ibm.com> - 2016-04-18 19:30 +0200
Re: [PATCH v11 4/4] tpm: Add documentation for the tpm_vtpm_proxy device driver Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-04-22 18:50 +0200
[PATCH v11 3/4] tpm: Proxy driver for supporting multiple emulated TPMs Stefan Berger <stefanb@linux.vnet.ibm.com> - 2016-04-18 19:30 +0200
Re: [PATCH v11 3/4] tpm: Proxy driver for supporting multiple emulated TPMs Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-04-22 18:50 +0200
[PATCH v11 2/4] tpm: Introduce TPM_CHIP_FLAG_VIRTUAL Stefan Berger <stefanb@linux.vnet.ibm.com> - 2016-04-18 19:30 +0200
Re: [PATCH v11 2/4] tpm: Introduce TPM_CHIP_FLAG_VIRTUAL Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-04-22 18:50 +0200
Re: [PATCH v11 0/4] Multi-instance vTPM proxy driver Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-04-22 19:00 +0200
Re: [tpmdd-devel] [PATCH v11 0/4] Multi-instance vTPM proxy driver Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-04-26 11:30 +0200
Re: [tpmdd-devel] [PATCH v11 0/4] Multi-instance vTPM proxy driver Stefan Berger <stefanb@linux.vnet.ibm.com> - 2016-04-26 13:40 +0200
Re: [tpmdd-devel] [PATCH v11 0/4] Multi-instance vTPM proxy driver Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-04-27 15:00 +0200
Re: [tpmdd-devel] [PATCH v11 0/4] Multi-instance vTPM proxy driver Stefan Berger <stefanb@linux.vnet.ibm.com> - 2016-04-27 18:30 +0200
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