linux-kernel - Re: [PATCH 00/14] arm64: 16K translation granule support

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Message-ID: <CAKv+Gu-fbC9hFj4cvGWd4sEvxPaR-nfgWS7C+e+jdRTGKOtp4A@mail.gmail.com>
Date:	Wed, 2 Sep 2015 11:55:10 +0200
From:	Ard Biesheuvel <ard.biesheuvel@...aro.org>
To:	"Suzuki K. Poulose" <suzuki.poulose@....com>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Mark Rutland <mark.rutland@....com>,
	KVM devel mailing list <kvm@...r.kernel.org>,
	Marc Zyngier <marc.zyngier@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"kvmarm@...ts.cs.columbia.edu" <kvmarm@...ts.cs.columbia.edu>
Subject: Re: [PATCH 00/14] arm64: 16K translation granule support

On 13 August 2015 at 13:33, Suzuki K. Poulose <suzuki.poulose@....com> wrote:
> From: "Suzuki K. Poulose" <suzuki.poulose@....com>
>
> This series enables the 16K page size support on Linux for arm64.
> This series adds support for 48bit VA(4 level), 47bit VA(3 level) and
> 36bit VA(2 level) with 16K. 16K was a late addition to the architecture
> and is not implemented by all CPUs. Added a check to ensure the
> selected granule size is supported by the CPU, failing which the CPU
> won't proceed with booting.
>
> KVM bits have been tested on a fast model with GICv3 using Andre's kvmtool
> with gicv3 support[1].
>
> Patches 1-7 cleans up the kernel page size handling code.
> Patches 8-11 Fixes some issues with the KVM bits, mainly the fake PGD
>              handling code.
> Patch 12    Adds a check to ensure the CPU supports the selected granule size.
> Patch 13-14 Adds the 16k page size support bits.
>
> This series applies on top of for-next/core branch of the aarch64 tree and is
> also available here:
>
>         git://linux-arm.org/linux-skp.git  16k/v1
>


Hi Suzuki,

I have given this a spin on the FVP Base model to check UEFI booting,
and everything seems to work fine. (I tested 2-level and 3-level)
I didn't test the KVM changes, so for all patches except those:

Reviewed-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>
Tested-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>

Regards,
Ard.
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