tpm: have event log use the tpm_chip
Move the backing memory for the event log into tpm_chip and push
the tpm_chip into read_log. This optimizes read_log processing by
only doing it once and prepares things for the next patches in the
series which require the tpm_chip to locate the event log via
ACPI and OF handles instead of searching.
This is straightfoward except for the issue of passing a kref through
i_private with securityfs. Since securityfs_remove does not have any
removal fencing like sysfs we use the inode lock to safely get a
kref on the tpm_chip.
Suggested-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Nayna Jain <nayna@linux.vnet.ibm.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 9d69580..1ae9768 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -35,6 +35,8 @@
#include <linux/cdev.h>
#include <linux/highmem.h>
+#include "tpm_eventlog.h"
+
enum tpm_const {
TPM_MINOR = 224, /* officially assigned */
TPM_BUFSIZE = 4096,
@@ -146,6 +148,11 @@
TPM_CHIP_FLAG_HAVE_TIMEOUTS = BIT(4),
};
+struct tpm_chip_seqops {
+ struct tpm_chip *chip;
+ const struct seq_operations *seqops;
+};
+
struct tpm_chip {
struct device dev;
struct cdev cdev;
@@ -157,6 +164,10 @@
struct rw_semaphore ops_sem;
const struct tpm_class_ops *ops;
+ struct tpm_bios_log log;
+ struct tpm_chip_seqops bin_log_seqops;
+ struct tpm_chip_seqops ascii_log_seqops;
+
unsigned int flags;
int dev_num; /* /dev/tpm# */