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grub2/0004-ieee1275-ibmvpm-Move-TPM-initialization-functions-to.patch

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From 8c0b5f200352603e53b799fca7b63f845a978f19 Mon Sep 17 00:00:00 2001
From: Stefan Berger <stefanb@linux.ibm.com>
Date: Tue, 26 Nov 2024 15:39:43 -0500
Subject: [PATCH 4/7] ieee1275/ibmvpm: Move TPM initialization functions to own
file
Move common initialization functions from the ibmvtpm driver module into
tcg2.c that will be moved into the new TCG2 driver in a subsequent patch.
Make the functions available to the ibmvtpm driver as public functions
and variables.
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
---
grub-core/Makefile.core.def | 1 +
grub-core/commands/ieee1275/ibmvtpm.c | 44 ++-----------------
grub-core/lib/ieee1275/tcg2.c | 61 +++++++++++++++++++++++++++
include/grub/ieee1275/tpm.h | 31 ++++++++++++++
4 files changed, 97 insertions(+), 40 deletions(-)
create mode 100644 grub-core/lib/ieee1275/tcg2.c
create mode 100644 include/grub/ieee1275/tpm.h
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index 40427165e..c5fd796d4 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -1155,6 +1155,7 @@ module = {
name = tpm;
common = commands/tpm.c;
ieee1275 = commands/ieee1275/ibmvtpm.c;
+ ieee1275 = lib/ieee1275/tcg2.c;
enable = powerpc_ieee1275;
};
diff --git a/grub-core/commands/ieee1275/ibmvtpm.c b/grub-core/commands/ieee1275/ibmvtpm.c
index dd30c7432..284673217 100644
--- a/grub-core/commands/ieee1275/ibmvtpm.c
+++ b/grub-core/commands/ieee1275/ibmvtpm.c
@@ -23,46 +23,10 @@
#include <grub/types.h>
#include <grub/tpm.h>
#include <grub/ieee1275/ieee1275.h>
+#include <grub/ieee1275/tpm.h>
#include <grub/mm.h>
#include <grub/misc.h>
-static grub_ieee1275_ihandle_t tpm_ihandle;
-static grub_uint8_t tpm_version;
-
-static void
-tpm_get_tpm_version (void)
-{
- grub_ieee1275_phandle_t vtpm;
- char buffer[20];
-
- if (!grub_ieee1275_finddevice ("/vdevice/vtpm", &vtpm) &&
- !grub_ieee1275_get_property (vtpm, "compatible", buffer,
- sizeof (buffer), NULL) &&
- !grub_strcmp (buffer, "IBM,vtpm20"))
- tpm_version = 2;
-}
-
-static grub_err_t
-tpm_init (void)
-{
- static int init_success = 0;
-
- if (!init_success)
- {
- if (grub_ieee1275_open ("/vdevice/vtpm", &tpm_ihandle) < 0)
- {
- tpm_ihandle = GRUB_IEEE1275_IHANDLE_INVALID;
- return GRUB_ERR_UNKNOWN_DEVICE;
- }
-
- init_success = 1;
-
- tpm_get_tpm_version ();
- }
-
- return GRUB_ERR_NONE;
-}
-
static int
ibmvtpm_2hash_ext_log (grub_uint8_t pcrindex,
grub_uint32_t eventtype,
@@ -88,7 +52,7 @@ ibmvtpm_2hash_ext_log (grub_uint8_t pcrindex,
INIT_IEEE1275_COMMON (&args.common, "call-method", 8, 2);
args.method = (grub_ieee1275_cell_t) "2hash-ext-log";
- args.ihandle = tpm_ihandle;
+ args.ihandle = grub_ieee1275_tpm_ihandle;
args.pcrindex = pcrindex;
args.eventtype = eventtype;
args.description = (grub_ieee1275_cell_t) description;
@@ -136,7 +100,7 @@ grub_tpm_measure (unsigned char *buf, grub_size_t size, grub_uint8_t pcr,
grub_dprintf ("tpm", "log_event, pcr = %d, size = 0x%" PRIxGRUB_SIZE ", %s\n",
pcr, size, description);
- if (tpm_version == 2)
+ if (grub_ieee1275_tpm_version == 2)
return tpm2_log_event (buf, size, pcr, description);
return GRUB_ERR_NONE;
@@ -149,5 +113,5 @@ grub_tpm_present (void)
* Call tpm_init() "late" rather than from GRUB_MOD_INIT() so that device nodes
* can be found.
*/
- return tpm_init() == GRUB_ERR_NONE;
+ return grub_ieee1275_tpm_init() == GRUB_ERR_NONE;
}
diff --git a/grub-core/lib/ieee1275/tcg2.c b/grub-core/lib/ieee1275/tcg2.c
new file mode 100644
index 000000000..1819d1447
--- /dev/null
+++ b/grub-core/lib/ieee1275/tcg2.c
@@ -0,0 +1,61 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2024 IBM Corporation
+ * Copyright (C) 2024 Free Software Foundation, Inc.
+ *
+ * GRUB is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/types.h>
+#include <grub/tpm.h>
+#include <grub/ieee1275/tpm.h>
+#include <grub/mm.h>
+#include <grub/misc.h>
+
+grub_ieee1275_ihandle_t grub_ieee1275_tpm_ihandle;
+grub_uint8_t grub_ieee1275_tpm_version;
+
+static void
+tpm_get_tpm_version (void)
+{
+ grub_ieee1275_phandle_t vtpm;
+ char buffer[20];
+
+ if (!grub_ieee1275_finddevice ("/vdevice/vtpm", &vtpm) &&
+ !grub_ieee1275_get_property (vtpm, "compatible", buffer,
+ sizeof (buffer), NULL) &&
+ !grub_strcmp (buffer, "IBM,vtpm20"))
+ grub_ieee1275_tpm_version = 2;
+}
+
+grub_err_t
+grub_ieee1275_tpm_init (void)
+{
+ static int init_success = 0;
+
+ if (!init_success)
+ {
+ if (grub_ieee1275_open ("/vdevice/vtpm", &grub_ieee1275_tpm_ihandle) < 0)
+ {
+ grub_ieee1275_tpm_ihandle = GRUB_IEEE1275_IHANDLE_INVALID;
+ return GRUB_ERR_UNKNOWN_DEVICE;
+ }
+
+ init_success = 1;
+
+ tpm_get_tpm_version ();
+ }
+
+ return GRUB_ERR_NONE;
+}
diff --git a/include/grub/ieee1275/tpm.h b/include/grub/ieee1275/tpm.h
new file mode 100644
index 000000000..9575c1c68
--- /dev/null
+++ b/include/grub/ieee1275/tpm.h
@@ -0,0 +1,31 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2024 Free Software Foundation, Inc.
+ *
+ * GRUB is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GRUB_IEEE1275_TPM_HEADER
+#define GRUB_IEEE1275_TPM_HEADER 1
+
+#include <grub/err.h>
+#include <grub/types.h>
+#include <grub/ieee1275/ieee1275.h>
+
+extern grub_ieee1275_ihandle_t grub_ieee1275_tpm_ihandle;
+extern grub_uint8_t grub_ieee1275_tpm_version;
+
+extern grub_err_t grub_ieee1275_tpm_init (void);
+
+#endif
--
2.43.0
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