TPM: integrity interface

This patch adds internal kernel support for:
 - reading/extending a pcr value
 - looking up the tpm_chip for a given chip number

Signed-off-by: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index d64f6b7e5b8..8e00b4ddd08 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -26,6 +26,7 @@
 #include <linux/miscdevice.h>
 #include <linux/platform_device.h>
 #include <linux/io.h>
+#include <linux/tpm.h>
 
 enum tpm_timeout {
         TPM_TIMEOUT = 5,        /* msecs */
@@ -234,11 +235,28 @@ typedef union {
         struct  tpm_output_header out;
 } tpm_cmd_header;
 
+#define TPM_DIGEST_SIZE 20
+struct tpm_pcrread_out {
+        u8      pcr_result[TPM_DIGEST_SIZE];
+}__attribute__((packed));
+
+struct tpm_pcrread_in {
+        __be32  pcr_idx;
+}__attribute__((packed));
+
+struct tpm_pcrextend_in {
+        __be32  pcr_idx;
+        u8      hash[TPM_DIGEST_SIZE];
+}__attribute__((packed));
+
 typedef union {
         struct  tpm_getcap_params_out getcap_out;
         struct  tpm_readpubek_params_out readpubek_out;
         u8      readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)];
         struct  tpm_getcap_params_in getcap_in;
+        struct  tpm_pcrread_in  pcrread_in;
+        struct  tpm_pcrread_out pcrread_out;
+        struct  tpm_pcrextend_in pcrextend_in;
 } tpm_cmd_params;
 
 struct tpm_cmd_t {