From: Catalin Marinas <catalin.marinas@arm.com>
To: Yury Norov <ynorov@caviumnetworks.com>
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
Arnd Bergmann <arnd@arndb.de>,
Andrew Pinski <Andrew.Pinski@caviumnetworks.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Chris Metcalf <cmetcalf@ezchip.com>,
philipp.tomsich@theobroma-systems.com,
Joseph Myers <joseph@codesourcery.com>,
zhouchengming1@huawei.com,
Steve Ellcey <sellcey@caviumnetworks.com>,
Prasun.Kapoor@caviumnetworks.com, Andreas Schwab <schwab@suse.de>,
agraf@suse.de, szabolcs.nagy@arm.com, geert@linux-m68k.org,
Adam Borowski <kilobyte@angband.pl>,
manuel.montezelo@gmail.com, Chris Metcalf <cmetcalf@mellanox.com>,
Andrew Pinski <pinskia@gmail.com>,
linyongting@huawei.com, klimov.linux@gmail.com,
broonie@kernel.org,
Bamvor Zhangjian <bamvor.zhangjian@huawei.com>,
Bamvor Jian Zhang <bamvor.zhangjian@linaro.org>,
Maxim Kuvyrkov <maxim.kuvyrkov@linaro.org>,
Florian Weimer <fweimer@redhat.com>,
Nathan_Lynch@mentor.com, Andrew Pinski <apinski@cavium.com>,
Ramana Radhakrishnan <ramana.gcc@googlemail.com>,
schwidefsky@de.ibm.com, davem@davemloft.net,
christoph.muellner@theobroma-systems.com
Subject: Re: [PATCH 05/20] arm64: rename COMPAT to AARCH32_EL0 in Kconfig
Date: Thu, 8 Jun 2017 15:09:12 +0100 [thread overview]
Message-ID: <20170608140912.56rww67adolr4ytr@localhost> (raw)
In-Reply-To: <20170604120009.342-6-ynorov@caviumnetworks.com>
On Sun, Jun 04, 2017 at 02:59:54PM +0300, Yury Norov wrote:
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -402,7 +402,7 @@ config ARM64_ERRATUM_834220
>
> config ARM64_ERRATUM_845719
> bool "Cortex-A53: 845719: a load might read incorrect data"
> - depends on COMPAT
> + depends on AARCH32_EL0
> default y
> help
> This option adds an alternative code sequence to work around ARM
> @@ -784,7 +784,7 @@ config FORCE_MAX_ZONEORDER
>
> menuconfig ARMV8_DEPRECATED
> bool "Emulate deprecated/obsolete ARMv8 instructions"
> - depends on COMPAT
> + depends on AARCH32_EL0
> help
> Legacy software support may require certain instructions
> that have been deprecated or obsoleted in the architecture.
> @@ -1062,9 +1062,15 @@ menu "Userspace binary formats"
> source "fs/Kconfig.binfmt"
>
> config COMPAT
> + bool
> + depends on AARCH32_EL0
You could just use "def_bool y" here
> +
> +config AARCH32_EL0
> bool "Kernel support for 32-bit EL0"
> + def_bool y
> depends on ARM64_4K_PAGES || EXPERT
> select COMPAT_BINFMT_ELF if BINFMT_ELF
> + select COMPAT
and avoid the explicit select.
> select HAVE_UID16
> select OLD_SIGSUSPEND3
> select COMPAT_OLD_SIGACTION
[...]
> --- a/arch/arm64/kernel/cpuinfo.c
> +++ b/arch/arm64/kernel/cpuinfo.c
> @@ -139,15 +139,17 @@ static int c_show(struct seq_file *m, void *v)
> */
> seq_puts(m, "Features\t:");
> if (compat) {
> -#ifdef CONFIG_COMPAT
> - for (j = 0; compat_hwcap_str[j]; j++)
> - if (compat_elf_hwcap & (1 << j))
> - seq_printf(m, " %s", compat_hwcap_str[j]);
> -
> - for (j = 0; compat_hwcap2_str[j]; j++)
> - if (compat_elf_hwcap2 & (1 << j))
> - seq_printf(m, " %s", compat_hwcap2_str[j]);
> -#endif /* CONFIG_COMPAT */
> +#ifdef CONFIG_AARCH32_EL0
> + if (personality(current->personality) == PER_LINUX32) {
> + for (j = 0; compat_hwcap_str[j]; j++)
> + if (compat_elf_hwcap & (1 << j))
> + seq_printf(m, " %s", compat_hwcap_str[j]);
> +
> + for (j = 0; compat_hwcap2_str[j]; j++)
> + if (compat_elf_hwcap2 & (1 << j))
> + seq_printf(m, " %s", compat_hwcap2_str[j]);
> + }
> +#endif /* CONFIG_AARCH32_EL0 */
I don't understand this hunk. Why do you need another check on
personality? "compat" is already true if PER_LINUX32.
--
Catalin
next prev parent reply other threads:[~2017-06-08 14:09 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-04 11:59 Yury Norov
2017-06-04 11:59 ` [PATCH 01/20] compat ABI: use non-compat openat and open_by_handle_at variants Yury Norov
2017-06-04 11:59 ` [PATCH 02/20] 32-bit ABI: introduce ARCH_32BIT_OFF_T config option Yury Norov
2017-06-08 15:09 ` Catalin Marinas
2017-06-13 11:04 ` Yury Norov
2017-06-14 12:31 ` Catalin Marinas
2017-06-04 11:59 ` [PATCH 03/20] asm-generic: Drop getrlimit and setrlimit syscalls from default list Yury Norov
2017-06-05 14:44 ` James Hogan
2017-06-07 18:48 ` Yury Norov
2017-06-04 11:59 ` [PATCH 04/20] arm64: ilp32: add documentation on the ILP32 ABI for ARM64 Yury Norov
2017-06-04 11:59 ` [PATCH 05/20] arm64: rename COMPAT to AARCH32_EL0 in Kconfig Yury Norov
2017-06-08 14:09 ` Catalin Marinas [this message]
2017-06-08 22:40 ` Yury Norov
2017-06-09 10:59 ` Catalin Marinas
2017-06-19 15:58 ` James Morse
2017-06-20 23:10 ` Yury Norov
2017-06-22 11:45 ` Yury Norov
2017-06-04 11:59 ` [PATCH 06/20] arm64: ensure the kernel is compiled for LP64 Yury Norov
2017-06-04 11:59 ` [PATCH 07/20] arm64:uapi: set __BITS_PER_LONG correctly for ILP32 and LP64 Yury Norov
2017-06-04 11:59 ` [PATCH 08/20] thread: move thread bits accessors to separated file Yury Norov
2017-06-04 11:59 ` [PATCH 09/20] arm64: introduce is_a32_task and is_a32_thread (for AArch32 compat) Yury Norov
2017-06-04 11:59 ` [PATCH 10/20] arm64: ilp32: add is_ilp32_compat_{task,thread} and TIF_32BIT_AARCH64 Yury Norov
2017-06-04 12:00 ` [PATCH 11/20] arm64: introduce binfmt_elf32.c Yury Norov
2017-06-04 12:00 ` [PATCH 12/20] arm64: ilp32: introduce binfmt_ilp32.c Yury Norov
2017-06-04 12:00 ` [PATCH 13/20] arm64: ilp32: share aarch32 syscall handlers Yury Norov
2017-06-08 14:10 ` Catalin Marinas
2017-06-08 14:28 ` Arnd Bergmann
2017-06-04 12:00 ` [PATCH 14/20] arm64: ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it Yury Norov
2017-06-08 15:05 ` James Morse
2017-06-09 7:06 ` Yury Norov
2017-06-04 12:00 ` [PATCH 15/20] arm64: signal: share lp64 signal routines to ilp32 Yury Norov
2017-06-04 12:00 ` [PATCH 16/20] arm64: signal32: move ilp32 and aarch32 common code to separated file Yury Norov
2017-06-19 16:16 ` James Morse
2017-06-20 14:16 ` Yury Norov
2017-06-04 12:00 ` [PATCH 17/20] arm64: ilp32: introduce ilp32-specific handlers for sigframe and ucontext Yury Norov
2017-06-04 12:00 ` [PATCH 18/20] arm64: ptrace: handle ptrace_request differently for aarch32 and ilp32 Yury Norov
2017-06-23 17:03 ` James Morse
2017-06-23 22:28 ` Yury Norov
2017-06-27 10:12 ` James Morse
2017-06-04 12:00 ` [PATCH 19/20] arm64:ilp32: add vdso-ilp32 and use for signal return Yury Norov
2017-06-08 15:24 ` Catalin Marinas
2017-06-08 23:06 ` Yury Norov
2017-06-04 12:00 ` [PATCH 20/20] arm64:ilp32: add ARM64_ILP32 to Kconfig Yury Norov
2017-06-14 20:16 ` your mail Yury Norov
-- strict thread matches above, loose matches on Subject: below --
2017-06-19 15:49 [PATCH v8 00/20] ILP32 for ARM64 Yury Norov
2017-06-19 15:49 ` [PATCH 05/20] arm64: rename COMPAT to AARCH32_EL0 in Kconfig Yury Norov
2017-03-01 19:19 [PATCH v7 resend 00/20] ILP32 for ARM64 Yury Norov
2017-03-01 19:19 ` [PATCH 05/20] arm64: rename COMPAT to AARCH32_EL0 in Kconfig Yury Norov
2017-01-09 11:29 [PATCH v7 00/20] ILP32 for ARM64 Yury Norov
2017-01-09 11:29 ` [PATCH 05/20] arm64: rename COMPAT to AARCH32_EL0 in Kconfig Yury Norov
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