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libgcrypt: Implement _gcry_get_hw_features()

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Implement _gcry_get_hw_features() and enable hardware feature detection
for x86_64.

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 09:28:56 +08:00 committed by Daniel Kiper
parent 8123561911
commit 0ff5faf8cd
4 changed files with 97 additions and 2 deletions
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4
autogen.sh
View File

@ -59,6 +59,10 @@ for x in sha256-ssse3-amd64.S sha256-avx-amd64.S sha256-avx2-bmi2-amd64.S sha256
cp grub-core/lib/libgcrypt/cipher/"$x" grub-core/lib/libgcrypt-grub/cipher/"$x"
done
if [ -f grub-core/lib/libgcrypt-grub/src/hwfeatures.c ]; then
rm grub-core/lib/libgcrypt-grub/src/hwfeatures.c
fi
for x in grub-core/lib/libgcrypt-patches/*.patch; do
patch -i $x -p1
done

1
conf/Makefile.extra-dist
View File

@ -47,6 +47,7 @@ EXTRA_DIST += grub-core/lib/libgcrypt-patches/09-blake2b-hash-buffers.patch
EXTRA_DIST += grub-core/lib/libgcrypt-patches/10-kdf-use-GPG-errs.patch
EXTRA_DIST += grub-core/lib/libgcrypt-patches/11-kdf-remove-unsupported-kdfs.patch
EXTRA_DIST += grub-core/lib/libgcrypt-patches/12-kdf-use-grub_divmod64.patch
EXTRA_DIST += grub-core/lib/libgcrypt-patches/13_add_hwfeatures.patch
EXTRA_DIST += grub-core/lib/libtasn1-patches/0001-libtasn1-disable-code-not-needed-in-grub.patch
EXTRA_DIST += grub-core/lib/libtasn1-patches/0002-libtasn1-replace-strcat-with-strcpy-in-_asn1_str_cat.patch

87
grub-core/lib/libgcrypt-patches/13_add_hwfeatures.patch Normal file
View File

@ -0,0 +1,87 @@
From 4403c452240417aaac7d3120c80b1325b7218768 Mon Sep 17 00:00:00 2001
From: Gary Lin <glin@suse.com>
Date: Fri, 18 Jul 2025 15:21:51 +0800
Subject: [PATCH 1/4] libgcrypt: Implement _gcry_get_hw_features()
Implement _gcry_get_hw_features() and enable hardware feature detection
for x86_64.
Signed-off-by: Gary Lin <glin@suse.com>
---
grub-core/Makefile.gcry.def | 8 ++++
grub-core/lib/libgcrypt-grub/src/hwfeatures.c | 47 +++++++++++++++++++
2 files changed, 55 insertions(+)
create mode 100644 grub-core/lib/libgcrypt-grub/src/hwfeatures.c
diff --git a/grub-core/Makefile.gcry.def b/grub-core/Makefile.gcry.def
index a0593fa09..c8caf17dc 100644
--- a/grub-core/Makefile.gcry.def
+++ b/grub-core/Makefile.gcry.def
@@ -226,3 +226,11 @@ module = {
cppflags = '$(CPPFLAGS_GCRY)';
};
+module = {
+ name = gcry_hwfeatures;
+ common = lib/libgcrypt-grub/src/hwfeatures.c;
+ x86_64_efi = lib/libgcrypt-grub/src/hwf-x86.c;
+
+ cflags = '$(CFLAGS_GCRY)';
+ cppflags = '$(CPPFLAGS_GCRY) $(CPPFLAGS_GCRY_ASM)';
+};
diff --git a/grub-core/lib/libgcrypt-grub/src/hwfeatures.c b/grub-core/lib/libgcrypt-grub/src/hwfeatures.c
new file mode 100644
index 000000000..4d744f8ec
--- /dev/null
+++ b/grub-core/lib/libgcrypt-grub/src/hwfeatures.c
@@ -0,0 +1,47 @@
+/*
+ * 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>
+GRUB_MOD_LICENSE ("GPLv3+");
+
+#include <grub/crypto.h>
+#include <grub/hwfeatures-gcry.h>
+#include "hwf-common.h"
+
+unsigned int
+_gcry_get_hw_features (void)
+{
+ static bool detected = false;
+ static unsigned int hw_features = 0;
+
+ if (grub_gcry_hwf_enabled () == false)
+ return 0;
+
+ if (detected == true)
+ return hw_features;
+
+#if defined (__x86_64__) && defined (GRUB_MACHINE_EFI)
+ hw_features = _gcry_hwf_detect_x86 ();
+#endif
+
+ grub_dprintf ("hwfeatures", "Detected features: 0x%x\n", hw_features);
+
+ detected = true;
+
+ return hw_features;
+}
--
2.51.0

5
include/grub/crypto.h
View File

@ -626,11 +626,14 @@ _gcry_ct_memequal (const void *b1, const void *b2, grub_size_t len);
unsigned int
_gcry_ct_not_memequal (const void *b1, const void *b2, grub_size_t len);
#if defined (GRUB_UTIL)
static inline unsigned int _gcry_get_hw_features (void)
{
return 0;
}
#else
extern unsigned int _gcry_get_hw_features (void);
#endif
void *_gcry_malloc(grub_size_t n);
void *_gcry_malloc_secure(grub_size_t n);