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lib/hwfeatures-gcry: Introduce functions to manage hardware features

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This commit introduces the generic functions to manage the hardware
features in libgcrypt. These functions are stubs for future
platform-specific implementations:
  - grub_gcry_hwf_enabled() returns __gcry_use_hwf which indicates if
    the hardware features are enabled specifically by grub_enable_gcry_hwf(),
  - grub_enable_gcry_hwf() invokes the architecture specific enablement
    functions and sets __gcry_use_hwf to true,
  - grub_reset_gcry_hwf() invokes the architecture specific reset
    functions and sets __gcry_use_hwf to false.

Signed-off-by: Gary Lin <glin@suse.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Gary Lin 2025-10-22 09:28:52 +08:00 committed by Daniel Kiper
parent d01abd7131
commit 06a5b88baf
4 changed files with 71 additions and 0 deletions
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1
Makefile.util.def
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@ -36,6 +36,7 @@ library = {
common = grub-core/kern/misc.c;
common = grub-core/kern/partition.c;
common = grub-core/lib/crypto.c;
common = grub-core/lib/hwfeatures-gcry.c;
common = grub-core/lib/json/json.c;
common = grub-core/disk/luks.c;
common = grub-core/disk/luks2.c;

1
grub-core/Makefile.core.def
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@ -1720,6 +1720,7 @@ module = {
module = {
name = crypto;
common = lib/crypto.c;
common = lib/hwfeatures-gcry.c;
extra_dist = lib/libgcrypt-grub/cipher/crypto.lst;
};

43
grub-core/lib/hwfeatures-gcry.c Normal file
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@ -0,0 +1,43 @@
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2025 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/dl.h>
#include <grub/hwfeatures-gcry.h>
GRUB_MOD_LICENSE ("GPLv3+");
static bool __gcry_use_hwf = false;
bool
grub_gcry_hwf_enabled (void)
{
return __gcry_use_hwf;
}
void
grub_enable_gcry_hwf (void)
{
__gcry_use_hwf = true;
}
void
grub_reset_gcry_hwf (void)
{
__gcry_use_hwf = false;
}

26
include/grub/hwfeatures-gcry.h Normal file
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@ -0,0 +1,26 @@
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2025 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 HWF_GCRY_HEADER
#define HWF_GCRY_HEADER 1
extern bool grub_gcry_hwf_enabled (void);
extern void grub_enable_gcry_hwf (void);
extern void grub_reset_gcry_hwf (void);
#endif /* HWF_GCRY_HEADER */