From: mark.rutland@arm.com (Mark Rutland)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 3/9] arm64: kernel: use ordinary return/argument register for el2_setup()
Date: Wed, 24 Aug 2016 17:20:48 +0100 [thread overview]
Message-ID: <20160824162047.GB30036@remoulade> (raw)
In-Reply-To: <1472049366-10922-4-git-send-email-ard.biesheuvel@linaro.org>
On Wed, Aug 24, 2016 at 04:36:00PM +0200, Ard Biesheuvel wrote:
> The function el2_setup() passes its return value in register w20, and
> in the two cases where the caller actually cares about this return value,
> it is passed into set_cpu_boot_mode_flag() [almost] directly, which
> expects its input in w20 as well.
>
> So there is no reason to use a 'special' callee saved register here, but
> we can simply follow the PCS for return value and first argument,
> respectively.
>
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Make sense to me. FWIW:
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Mark.
next prev parent reply other threads:[~2016-08-24 16:20 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-24 14:35 [PATCH v2 0/9] arm64: clean up early boot function calls Ard Biesheuvel
2016-08-24 14:35 ` [PATCH v2 1/9] arm64: kernel: get rid of x25 and x26 with 'global' scope Ard Biesheuvel
2016-08-24 14:35 ` [PATCH v2 2/9] arm64: kernel: fix style issues in sleep.S Ard Biesheuvel
2016-08-24 16:13 ` Mark Rutland
2016-08-24 14:36 ` [PATCH v2 3/9] arm64: kernel: use ordinary return/argument register for el2_setup() Ard Biesheuvel
2016-08-24 16:20 ` Mark Rutland [this message]
2016-08-24 14:36 ` [PATCH v2 4/9] arm64: head.S: move KASLR processing out of __enable_mmu() Ard Biesheuvel
2016-08-24 20:36 ` Mark Rutland
2016-08-24 20:44 ` Ard Biesheuvel
2016-08-24 20:46 ` Mark Rutland
2016-08-25 13:59 ` Ard Biesheuvel
2016-08-30 10:24 ` Mark Rutland
2016-08-30 13:45 ` Mark Rutland
2016-08-24 14:36 ` [PATCH v2 5/9] arm64: kernel: use x30 for __enable_mmu return address Ard Biesheuvel
2016-08-24 14:36 ` [PATCH v2 6/9] arm64: call __enable_mmu as an ordinary function for secondary/resume Ard Biesheuvel
2016-08-30 14:07 ` Mark Rutland
2016-08-24 14:36 ` [PATCH v2 7/9] arm64: kernel: drop use of x24 from primary boot path Ard Biesheuvel
2016-08-30 14:26 ` Mark Rutland
2016-08-24 14:36 ` [PATCH v2 8/9] arm64: head.S: use ordinary stack frame for __primary_switched() Ard Biesheuvel
2016-08-30 14:38 ` Mark Rutland
2016-08-24 14:36 ` [PATCH v2 9/9] arm64: head.S: document the use of callee saved registers Ard Biesheuvel
2016-08-30 14:43 ` Mark Rutland
2016-08-30 14:48 ` [PATCH v2 0/9] arm64: clean up early boot function calls Mark Rutland
2016-08-30 14:50 ` Ard Biesheuvel
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