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From: Mark Brown <broonie@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	Eric Biederman <ebiederm@xmission.com>,
	Kees Cook <keescook@chromium.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>,
	Szabolcs Nagy <szabolcs.nagy@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	Mark Brown <broonie@kernel.org>
Subject: [PATCH v2 2/4] elf: Allow architectures to provide AT_HWCAP3
Date: Mon, 20 Jun 2022 13:54:49 +0100	[thread overview]
Message-ID: <20220620125451.653507-3-broonie@kernel.org> (raw)
In-Reply-To: <20220620125451.653507-1-broonie@kernel.org>

In order to provide for architectures which have filled both AT_HWCAP and
AT_HWCAP2 add support for AT_HWCAP3.

Signed-off-by: Mark Brown <broonie@kernel.org>
---
 fs/binfmt_elf.c             | 3 +++
 include/uapi/linux/auxvec.h | 1 +
 2 files changed, 4 insertions(+)

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 63c7ebb0da89..59d937dddc09 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -275,6 +275,9 @@ 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
 	NEW_AUX_ENT(AT_EXECFN, bprm->exec);
 	if (k_platform) {
diff --git a/include/uapi/linux/auxvec.h b/include/uapi/linux/auxvec.h
index c7e502bf5a6f..76631c7f9e8f 100644
--- a/include/uapi/linux/auxvec.h
+++ b/include/uapi/linux/auxvec.h
@@ -30,6 +30,7 @@
 				 * differ from AT_PLATFORM. */
 #define AT_RANDOM 25	/* address of 16 random bytes */
 #define AT_HWCAP2 26	/* extension of AT_HWCAP */
+#define AT_HWCAP3 27	/* further extension of AT_HWCAP */
 
 #define AT_EXECFN  31	/* filename of program */
 
-- 
2.30.2


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  parent reply	other threads:[~2022-06-20 13:21 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-20 12:54 [PATCH v2 0/4] arm64: Add AT_HWCAP3 Mark Brown
2022-06-20 12:54 ` [PATCH v2 1/4] arm64/cpufeature: Store elf_hwcaps as an array rather than unsigned long Mark Brown
2022-06-28 14:21   ` Will Deacon
2022-06-28 15:06     ` Mark Brown
2022-06-29 10:01       ` Szabolcs Nagy
2022-06-29 11:44         ` Mark Brown
2022-06-29 12:06           ` Szabolcs Nagy
2022-06-29 13:55         ` Catalin Marinas
2022-06-29 15:07           ` Mark Brown
2022-06-20 12:54 ` Mark Brown [this message]
2022-06-20 12:54 ` [PATCH v2 3/4] arm64/cpufeature: Support AT_HWCAP3 Mark Brown
2022-06-20 12:54 ` [PATCH v2 4/4] arm64/hwcap: Support FEAT_EBF16 Mark Brown
2022-07-05 17:53 ` [PATCH v2 0/4] arm64: Add AT_HWCAP3 Mark Brown
2022-07-06  9:02   ` Szabolcs Nagy
2022-07-06 10:08   ` Marc Zyngier
2022-07-06 13:48     ` Mark Brown

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