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linux-sg2042
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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6 

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
  tpm: Autodetect itpm devices
This commit is contained in:
Linus Torvalds 2010-11-29 14:38:06 -08:00
parent a01af8e4a4 3f0d3d016d
commit 8f1b1a5096
1 changed files with 24 additions and 0 deletions
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24
drivers/char/tpm/tpm_tis.c
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@ -25,6 +25,7 @@
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
#include <linux/acpi.h>
#include "tpm.h"
#define TPM_HEADER_SIZE 10
@ -78,6 +79,26 @@ enum tis_defaults {
static LIST_HEAD(tis_chips);
static DEFINE_SPINLOCK(tis_lock);
#ifdef CONFIG_ACPI
static int is_itpm(struct pnp_dev *dev)
{
struct acpi_device *acpi = pnp_acpi_device(dev);
struct acpi_hardware_id *id;
list_for_each_entry(id, &acpi->pnp.ids, list) {
if (!strcmp("INTC0102", id->id))
return 1;
}
return 0;
}
#else
static int is_itpm(struct pnp_dev *dev)
{
return 0;
}
#endif
static int check_locality(struct tpm_chip *chip, int l)
{
if ((ioread8(chip->vendor.iobase + TPM_ACCESS(l)) &
@ -472,6 +493,9 @@ static int tpm_tis_init(struct device *dev, resource_size_t start,
"1.2 TPM (device-id 0x%X, rev-id %d)\n",
vendor >> 16, ioread8(chip->vendor.iobase + TPM_RID(0)));
if (is_itpm(to_pnp_dev(dev)))
itpm = 1;
if (itpm)
dev_info(dev, "Intel iTPM workaround enabled\n");