From: Mark Brown <broonie@kernel.org>
To: Alexander Viro <viro@zeniv.linux.org.uk>,
Christian Brauner <brauner@kernel.org>, Jan Kara <jack@suse.cz>,
Eric Biederman <ebiederm@xmission.com>,
Kees Cook <kees@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Jonathan Corbet <corbet@lwn.net>
Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org,
Yury Khrustalev <yury.khrustalev@arm.com>,
Wilco Dijkstra <wilco.dijkstra@arm.com>,
linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org,
Mark Brown <broonie@kernel.org>
Subject: [PATCH RFC v2 1/2] binfmt_elf: Wire up AT_HWCAP3 at AT_HWCAP4
Date: Fri, 04 Oct 2024 21:26:29 +0100 [thread overview]
Message-ID: <20241004-arm64-elf-hwcap3-v2-1-799d1daad8b0@kernel.org> (raw)
In-Reply-To: <20241004-arm64-elf-hwcap3-v2-0-799d1daad8b0@kernel.org>
AT_HWCAP3 and AT_HWCAP4 were recently defined for use on PowerPC in commit
3281366a8e79 ("uapi/auxvec: Define AT_HWCAP3 and AT_HWCAP4 aux vector,
entries"). Since we want to start using AT_HWCAP3 on arm64 add support for
exposing both these new hwcaps via binfmt_elf.
Signed-off-by: Mark Brown <broonie@kernel.org>
---
fs/binfmt_elf.c | 6 ++++++
fs/binfmt_elf_fdpic.c | 6 ++++++
fs/compat_binfmt_elf.c | 10 ++++++++++
3 files changed, 22 insertions(+)
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 06dc4a57ba78a7939bbde96bf181eefa950ea13a..3039a6b7aba4bd38f26e21b626b579cc03f3a03e 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -257,6 +257,12 @@ create_elf_tables(struct linux_binprm *bprm, const struct elfhdr *exec,
NEW_AUX_ENT(AT_RANDOM, (elf_addr_t)(unsigned long)u_rand_bytes);
#ifdef ELF_HWCAP2
NEW_AUX_ENT(AT_HWCAP2, ELF_HWCAP2);
+#endif
+#ifdef ELF_HWCAP3
+ NEW_AUX_ENT(AT_HWCAP3, ELF_HWCAP3);
+#endif
+#ifdef ELF_HWCAP4
+ NEW_AUX_ENT(AT_HWCAP4, ELF_HWCAP4);
#endif
NEW_AUX_ENT(AT_EXECFN, bprm->exec);
if (k_platform) {
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index 4fe5bb9f1b1f5e0be6e8d1ef5b20492935b90633..31d253bd3961a8679678c600f4346bba23502598 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -623,6 +623,12 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
NEW_AUX_ENT(AT_HWCAP, ELF_HWCAP);
#ifdef ELF_HWCAP2
NEW_AUX_ENT(AT_HWCAP2, ELF_HWCAP2);
+#endif
+#ifdef ELF_HWCAP3
+ NEW_AUX_ENT(AT_HWCAP3, ELF_HWCAP3);
+#endif
+#ifdef ELF_HWCAP4
+ NEW_AUX_ENT(AT_HWCAP4, ELF_HWCAP4);
#endif
NEW_AUX_ENT(AT_PAGESZ, PAGE_SIZE);
NEW_AUX_ENT(AT_CLKTCK, CLOCKS_PER_SEC);
diff --git a/fs/compat_binfmt_elf.c b/fs/compat_binfmt_elf.c
index 8f0af4f626316ed2e92204ff9bf381cd14103ae9..d5ef5469e4e620f6ee97f40ce9cbbfa48e37e33c 100644
--- a/fs/compat_binfmt_elf.c
+++ b/fs/compat_binfmt_elf.c
@@ -80,6 +80,16 @@
#define ELF_HWCAP2 COMPAT_ELF_HWCAP2
#endif
+#ifdef COMPAT_ELF_HWCAP3
+#undef ELF_HWCAP3
+#define ELF_HWCAP3 COMPAT_ELF_HWCAP3
+#endif
+
+#ifdef COMPAT_ELF_HWCAP4
+#undef ELF_HWCAP4
+#define ELF_HWCAP4 COMPAT_ELF_HWCAP4
+#endif
+
#ifdef COMPAT_ARCH_DLINFO
#undef ARCH_DLINFO
#define ARCH_DLINFO COMPAT_ARCH_DLINFO
--
2.39.2
next prev parent reply other threads:[~2024-10-04 20:29 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-04 20:26 [PATCH RFC v2 0/2] arm64: Add infrastructure for use of AT_HWCAP3 Mark Brown
2024-10-04 20:26 ` Mark Brown [this message]
2024-10-05 0:22 ` [PATCH RFC v2 1/2] binfmt_elf: Wire up AT_HWCAP3 at AT_HWCAP4 Kees Cook
2024-10-08 7:03 ` Anshuman Khandual
2024-10-04 20:26 ` [PATCH RFC v2 2/2] arm64: Support AT_HWCAP3 Mark Brown
2024-10-08 7:15 ` Anshuman Khandual
2024-10-08 10:04 ` Mark Brown
2024-10-17 17:58 ` [PATCH RFC v2 0/2] arm64: Add infrastructure for use of AT_HWCAP3 Catalin Marinas
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