2020-03-12 15:56:33

by Stefan Berger

Subject: [PATCH v7 3/3] tpm: ibmvtpm: Add support for TPM2

From: Stefan Berger <[email protected]>

Support TPM2 in the IBM vTPM driver. The hypervisor tells us what
version of TPM is connected through the vio_device_id.

In case a TPM2 device is found, we set the TPM_CHIP_FLAG_TPM2 flag
and get the command codes attributes table. The driver does
not need the timeouts and durations, though.

Signed-off-by: Stefan Berger <[email protected]>
Acked-by: Nayna Jain <[email protected]>
Tested-by: Nayna Jain <[email protected]>
---
drivers/char/tpm/tpm.h | 1 +
drivers/char/tpm/tpm2-cmd.c | 2 +-
drivers/char/tpm/tpm_ibmvtpm.c | 8 ++++++++
3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 2b2c225e1190..0fbcede241ea 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -226,6 +226,7 @@ int tpm2_auto_startup(struct tpm_chip *chip);
void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type);
unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
int tpm2_probe(struct tpm_chip *chip);
+int tpm2_get_cc_attrs_tbl(struct tpm_chip *chip);
int tpm2_find_cc(struct tpm_chip *chip, u32 cc);
int tpm2_init_space(struct tpm_space *space);
void tpm2_del_space(struct tpm_chip *chip, struct tpm_space *space);
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
index 760329598b99..76f67b155bd5 100644
--- a/drivers/char/tpm/tpm2-cmd.c
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -615,7 +615,7 @@ ssize_t tpm2_get_pcr_allocation(struct tpm_chip *chip)
return rc;
}

-static int tpm2_get_cc_attrs_tbl(struct tpm_chip *chip)
+int tpm2_get_cc_attrs_tbl(struct tpm_chip *chip)
{
struct tpm_buf buf;
u32 nr_commands;
diff --git a/drivers/char/tpm/tpm_ibmvtpm.c b/drivers/char/tpm/tpm_ibmvtpm.c
index cfe40e7b1ba4..1a49db9e108e 100644
--- a/drivers/char/tpm/tpm_ibmvtpm.c
+++ b/drivers/char/tpm/tpm_ibmvtpm.c
@@ -29,6 +29,7 @@ static const char tpm_ibmvtpm_driver_name[] = "tpm_ibmvtpm";

static const struct vio_device_id tpm_ibmvtpm_device_table[] = {
{ "IBM,vtpm", "IBM,vtpm"},
+ { "IBM,vtpm", "IBM,vtpm20"},
{ "", "" }
};
MODULE_DEVICE_TABLE(vio, tpm_ibmvtpm_device_table);
@@ -672,6 +673,13 @@ static int tpm_ibmvtpm_probe(struct vio_dev *vio_dev,
if (rc)
goto init_irq_cleanup;

+ if (!strcmp(id->compat, "IBM,vtpm20")) {
+ chip->flags |= TPM_CHIP_FLAG_TPM2;
+ rc = tpm2_get_cc_attrs_tbl(chip);
+ if (rc)
+ goto init_irq_cleanup;
+ }
+
if (!wait_event_timeout(ibmvtpm->crq_queue.wq,
ibmvtpm->rtce_buf != NULL,
HZ)) {
--
2.23.0

2020-03-13 15:31:41

by Jarkko Sakkinen

Subject: Re: [PATCH v7 3/3] tpm: ibmvtpm: Add support for TPM2

On Thu, Mar 12, 2020 at 11:53:32AM -0400, Stefan Berger wrote:
> From: Stefan Berger <[email protected]>
>
> Support TPM2 in the IBM vTPM driver. The hypervisor tells us what
> version of TPM is connected through the vio_device_id.
>
> In case a TPM2 device is found, we set the TPM_CHIP_FLAG_TPM2 flag
> and get the command codes attributes table. The driver does
> not need the timeouts and durations, though.
>
> Signed-off-by: Stefan Berger <[email protected]>
> Acked-by: Nayna Jain <[email protected]>
> Tested-by: Nayna Jain <[email protected]>
> ---
> drivers/char/tpm/tpm.h | 1 +
> drivers/char/tpm/tpm2-cmd.c | 2 +-
> drivers/char/tpm/tpm_ibmvtpm.c | 8 ++++++++
> 3 files changed, 10 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
> index 2b2c225e1190..0fbcede241ea 100644
> --- a/drivers/char/tpm/tpm.h
> +++ b/drivers/char/tpm/tpm.h
> @@ -226,6 +226,7 @@ int tpm2_auto_startup(struct tpm_chip *chip);
> void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type);
> unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
> int tpm2_probe(struct tpm_chip *chip);
> +int tpm2_get_cc_attrs_tbl(struct tpm_chip *chip);
> int tpm2_find_cc(struct tpm_chip *chip, u32 cc);
> int tpm2_init_space(struct tpm_space *space);
> void tpm2_del_space(struct tpm_chip *chip, struct tpm_space *space);
> diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
> index 760329598b99..76f67b155bd5 100644
> --- a/drivers/char/tpm/tpm2-cmd.c
> +++ b/drivers/char/tpm/tpm2-cmd.c
> @@ -615,7 +615,7 @@ ssize_t tpm2_get_pcr_allocation(struct tpm_chip *chip)
> return rc;
> }
>
> -static int tpm2_get_cc_attrs_tbl(struct tpm_chip *chip)
> +int tpm2_get_cc_attrs_tbl(struct tpm_chip *chip)
> {
> struct tpm_buf buf;
> u32 nr_commands;
> diff --git a/drivers/char/tpm/tpm_ibmvtpm.c b/drivers/char/tpm/tpm_ibmvtpm.c
> index cfe40e7b1ba4..1a49db9e108e 100644
> --- a/drivers/char/tpm/tpm_ibmvtpm.c
> +++ b/drivers/char/tpm/tpm_ibmvtpm.c
> @@ -29,6 +29,7 @@ static const char tpm_ibmvtpm_driver_name[] = "tpm_ibmvtpm";
>
> static const struct vio_device_id tpm_ibmvtpm_device_table[] = {
> { "IBM,vtpm", "IBM,vtpm"},
> + { "IBM,vtpm", "IBM,vtpm20"},
> { "", "" }
> };
> MODULE_DEVICE_TABLE(vio, tpm_ibmvtpm_device_table);
> @@ -672,6 +673,13 @@ static int tpm_ibmvtpm_probe(struct vio_dev *vio_dev,
> if (rc)
> goto init_irq_cleanup;
>
> + if (!strcmp(id->compat, "IBM,vtpm20")) {
> + chip->flags |= TPM_CHIP_FLAG_TPM2;
> + rc = tpm2_get_cc_attrs_tbl(chip);
> + if (rc)
> + goto init_irq_cleanup;
> + }
> +
> if (!wait_event_timeout(ibmvtpm->crq_queue.wq,
> ibmvtpm->rtce_buf != NULL,
> HZ)) {
> --
> 2.23.0
>

Reviewed-by: Jarkko Sakkinen <[email protected]>

/Jarkko