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From: Ard Biesheuvel <ardb@kernel.org>
To: linux-arm-kernel@lists.infradead.org, linux@armlinux.org.uk
Cc: Ard Biesheuvel <ardb@kernel.org>,
	Nicolas Pitre <nico@fluxnic.net>, Arnd Bergmann <arnd@arndb.de>,
	Kees Cook <keescook@chromium.org>,
	Keith Packard <keithpac@amazon.com>,
	Linus Walleij <linus.walleij@linaro.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Tony Lindgren <tony@atomide.com>, Marc Zyngier <maz@kernel.org>,
	Vladimir Murzin <vladimir.murzin@arm.com>,
	Jesse Taube <mr.bossman075@gmail.com>
Subject: [PATCH v3 11/14] ARM: use TLS register for 'current' on !SMP as well
Date: Fri,  3 Dec 2021 11:09:00 +0100	[thread overview]
Message-ID: <20211203100903.334206-12-ardb@kernel.org> (raw)
In-Reply-To: <20211203100903.334206-1-ardb@kernel.org>

Enable the use of the TLS register to hold the 'current' pointer also on
non-SMP configurations that target v6k or later CPUs. This will permit
the use of THREAD_INFO_IN_TASK as well as IRQ stacks and vmap'ed stacks
for such configurations.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Nicolas Pitre <nico@fluxnic.net>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 arch/arm/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index b0e403076227..5ad2151c43dd 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1154,7 +1154,7 @@ config SMP_ON_UP
 
 config CURRENT_POINTER_IN_TPIDRURO
 	def_bool y
-	depends on SMP && CPU_32v6K && !CPU_V6
+	depends on CPU_32v6K && !CPU_V6
 
 config IRQSTACKS
 	def_bool y
-- 
2.30.2


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  parent reply	other threads:[~2021-12-03 10:15 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-03 10:08 [PATCH v3 00/14] ARM: enable IRQ stacks and vmap'ed stacks for UP Ard Biesheuvel
2021-12-03 10:08 ` [PATCH v3 01/14] ARM: riscpc: use GENERIC_IRQ_MULTI_HANDLER Ard Biesheuvel
2021-12-03 10:08 ` [PATCH v3 02/14] ARM: footbridge: " Ard Biesheuvel
2021-12-03 10:08 ` [PATCH v3 03/14] ARM: iop32x: offset IRQ numbers by 1 Ard Biesheuvel
2021-12-03 10:08 ` [PATCH v3 04/14] ARM: iop32x: use GENERIC_IRQ_MULTI_HANDLER Ard Biesheuvel
2021-12-03 10:08 ` [PATCH v3 05/14] ARM: remove old-style irq entry Ard Biesheuvel
2021-12-03 10:08 ` [PATCH v3 06/14] irqchip: nvic: Use GENERIC_IRQ_MULTI_HANDLER Ard Biesheuvel
2021-12-03 10:08 ` [PATCH v3 07/14] ARM: entry: preserve thread_info pointer in switch_to Ard Biesheuvel
2021-12-03 10:08 ` [PATCH v3 08/14] ARM: module: implement support for PC-relative group relocations Ard Biesheuvel
2021-12-03 10:08 ` [PATCH v3 09/14] ARM: assembler: add optimized ldr/str macros to load variables from memory Ard Biesheuvel
2021-12-03 10:08 ` [PATCH v3 10/14] ARM: percpu: add SMP_ON_UP support Ard Biesheuvel
2021-12-03 10:09 ` Ard Biesheuvel [this message]
2021-12-03 10:09 ` [PATCH v3 12/14] ARM: smp: defer TPIDRURO update for SMP v6 configurations too Ard Biesheuvel
2021-12-03 10:09 ` [PATCH v3 13/14] ARM: implement THREAD_INFO_IN_TASK for uniprocessor systems Ard Biesheuvel
2021-12-03 10:09 ` [PATCH v3 14/14] ARM: v7m: enable support for IRQ stacks Ard Biesheuvel
2021-12-03 10:46 ` [PATCH v3 00/14] ARM: enable IRQ stacks and vmap'ed stacks for UP Vladimir Murzin
2021-12-03 12:53 ` Marc Zyngier
2021-12-05  0:38   ` Linus Walleij

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