8c0b5f2003
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>
62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2024 IBM Corporation
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* Copyright (C) 2024 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/types.h>
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#include <grub/tpm.h>
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#include <grub/ieee1275/tpm.h>
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#include <grub/mm.h>
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#include <grub/misc.h>
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grub_ieee1275_ihandle_t grub_ieee1275_tpm_ihandle;
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grub_uint8_t grub_ieee1275_tpm_version;
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static void
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tpm_get_tpm_version (void)
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{
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grub_ieee1275_phandle_t vtpm;
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char buffer[20];
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if (!grub_ieee1275_finddevice ("/vdevice/vtpm", &vtpm) &&
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!grub_ieee1275_get_property (vtpm, "compatible", buffer,
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sizeof (buffer), NULL) &&
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!grub_strcmp (buffer, "IBM,vtpm20"))
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grub_ieee1275_tpm_version = 2;
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}
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grub_err_t
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grub_ieee1275_tpm_init (void)
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{
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static int init_success = 0;
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if (!init_success)
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{
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if (grub_ieee1275_open ("/vdevice/vtpm", &grub_ieee1275_tpm_ihandle) < 0)
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{
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grub_ieee1275_tpm_ihandle = GRUB_IEEE1275_IHANDLE_INVALID;
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return GRUB_ERR_UNKNOWN_DEVICE;
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}
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init_success = 1;
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tpm_get_tpm_version ();
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}
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return GRUB_ERR_NONE;
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}
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