| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Fri, 5 Dec 2014 16:13:03 +0200
From: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To: Peter Hüwe <PeterHuewe@....de>
Cc: Ashley Lai <ashley@...leylai.com>,
Marcel Selhorst <tpmdd@...horst.net>,
tpmdd-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
josh.triplett@...el.com, christophe.ricard@...il.com,
jason.gunthorpe@...idianresearch.com, linux-api@...r.kernel.org,
trousers-tech@...ts.sourceforge.net,
Will Arthur <will.c.arthur@...el.com>
Subject: Re: [PATCH v9 6/8] tpm: TPM 2.0 baseline support
Hey
is it cool if I prepare a separate set of fixes for all issues
in v9? I do not see any problem that could not be fixed without
major structural changes.
/Jarkko
On Fri, Dec 05, 2014 at 12:17:40AM +0100, Peter Hüwe wrote:
> Am Donnerstag, 4. Dezember 2014, 06:55:16 schrieb Jarkko Sakkinen:
> > TPM 2.0 devices are separated by adding a field 'flags' to struct
> > tpm_chip and defining a flag TPM_CHIP_FLAG_TPM2 for tagging them.
> >
> > This patch adds the following internal functions:
> >
> > - tpm2_get_random()
> > - tpm2_get_tpm_pt()
> > - tpm2_pcr_extend()
> > - tpm2_pcr_read()
> > - tpm2_startup()
> >
> > Additionally, the following exported functions are implemented for
> > implementing TPM 2.0 device drivers:
> >
> > - tpm2_do_selftest()
> > - tpm2_calc_ordinal_durations()
> > - tpm2_gen_interrupt()
> >
> > The existing functions that are exported for the use for existing
> > subsystems have been changed to check the flags field in struct
> > tpm_chip and use appropriate TPM 2.0 counterpart if
> > TPM_CHIP_FLAG_TPM2 is est.
> >
> > The code for tpm2_calc_ordinal_duration() and tpm2_startup() were
> > originally written by Will Arthur.
> >
> > Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> > Signed-off-by: Will Arthur <will.c.arthur@...el.com>
> > ---
> > drivers/char/tpm/Makefile | 2 +-
> > drivers/char/tpm/tpm-chip.c | 27 +-
> > drivers/char/tpm/tpm-interface.c | 24 +-
> > drivers/char/tpm/tpm.h | 61 +++++
> > drivers/char/tpm/tpm2-cmd.c | 542
> > +++++++++++++++++++++++++++++++++++++++ 5 files changed, 641
> > insertions(+), 15 deletions(-)
> > create mode 100644 drivers/char/tpm/tpm2-cmd.c
> >
> > diff --git a/drivers/char/tpm/Makefile b/drivers/char/tpm/Makefile
> > index c715596..88848ed 100644
> > --- a/drivers/char/tpm/Makefile
> > +++ b/drivers/char/tpm/Makefile
> > @@ -2,7 +2,7 @@
> > # Makefile for the kernel tpm device drivers.
> > #
> > obj-$(CONFIG_TCG_TPM) += tpm.o
> > -tpm-y := tpm-interface.o tpm-dev.o tpm-sysfs.o tpm-chip.o
> > +tpm-y := tpm-interface.o tpm-dev.o tpm-sysfs.o tpm-chip.o tpm2-cmd.o
> > tpm-$(CONFIG_ACPI) += tpm_ppi.o
> >
> > ifdef CONFIG_ACPI
> > diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
> > index 7741e28..3f3f2de 100644
> > --- a/drivers/char/tpm/tpm-chip.c
> > +++ b/drivers/char/tpm/tpm-chip.c
> > @@ -195,15 +195,18 @@ int tpm_chip_register(struct tpm_chip *chip)
> > if (rc)
> > return rc;
> >
> > - rc = tpm_sysfs_add_device(chip);
> > - if (rc)
> > - goto del_misc;
> > + /* Populate sysfs for TPM1 devices. */
> > + if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) {
> > + rc = tpm_sysfs_add_device(chip);
> > + if (rc)
> > + goto del_misc;
> >
> > - rc = tpm_add_ppi(chip);
> > - if (rc)
> > - goto del_sysfs;
> > + rc = tpm_add_ppi(chip);
> > + if (rc)
> > + goto del_sysfs;
> >
> > - chip->bios_dir = tpm_bios_log_setup(chip->devname);
> > + chip->bios_dir = tpm_bios_log_setup(chip->devname);
> > + }
> >
> > /* Make the chip available. */
> > spin_lock(&driver_lock);
> > @@ -236,10 +239,12 @@ void tpm_chip_unregister(struct tpm_chip *chip)
> > spin_unlock(&driver_lock);
> > synchronize_rcu();
> >
> > - if (chip->bios_dir)
> > - tpm_bios_log_teardown(chip->bios_dir);
> > - tpm_remove_ppi(chip);
> > - tpm_sysfs_del_device(chip);
> > + if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) {
> > + if (chip->bios_dir)
> > + tpm_bios_log_teardown(chip->bios_dir);
> > + tpm_remove_ppi(chip);
> > + tpm_sysfs_del_device(chip);
> > + }
> >
> > tpm_dev_del_device(chip);
> > }
> > diff --git a/drivers/char/tpm/tpm-interface.c
> > b/drivers/char/tpm/tpm-interface.c index b6f6b17..8a14887 100644
> > --- a/drivers/char/tpm/tpm-interface.c
> > +++ b/drivers/char/tpm/tpm-interface.c
> > @@ -360,7 +360,10 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char
> > *buf, if (chip->vendor.irq)
> > goto out_recv;
> >
> > - stop = jiffies + tpm_calc_ordinal_duration(chip, ordinal);
> > + if (chip->flags & TPM_CHIP_FLAG_TPM2)
> > + stop = jiffies + tpm2_calc_ordinal_duration(chip, ordinal);
> > + else
> > + stop = jiffies + tpm_calc_ordinal_duration(chip, ordinal);
> > do {
> > u8 status = chip->ops->status(chip);
> > if ((status & chip->ops->req_complete_mask) ==
> > @@ -483,7 +486,7 @@ static const struct tpm_input_header tpm_startup_header
> > = { static int tpm_startup(struct tpm_chip *chip, __be16 startup_type) {
> > struct tpm_cmd_t start_cmd;
> > - start_cmd.header.in = tpm_startup_header;
> > +
> WHY?!? This renders tpm_startup useless.
>
> So NACK for this part.
> > start_cmd.params.startup_in.startup_type = startup_type;
> > return tpm_transmit_cmd(chip, &start_cmd, TPM_INTERNAL_RESULT_SIZE,
> > "attempting to start the TPM");
>
> I'll get you an TPM1.2 :)
>
> Thanks
> Peter
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists