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From: Marcin Wojtas <mw@semihalf.com>
To: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: edk2-devel-01 <edk2-devel@lists.01.org>,
	Leif Lindholm <leif.lindholm@linaro.org>,
	 nadavh@marvell.com, Neta Zur Hershkovits <neta@marvell.com>,
	 Kostya Porotchkin <kostap@marvell.com>,
	Hua Jing <jinghua@marvell.com>,
	 semihalf-dabros-jan <jsd@semihalf.com>
Subject: Re: [platforms: PATCH 08/13] Marvell/Armada: Modify GICC alias
Date: Tue, 10 Oct 2017 16:56:17 +0200	[thread overview]
Message-ID: <CAPv3WKeA5=ATbB7yWYm4CuDODHSMgvZie7UTzKgoTSknfrecGQ@mail.gmail.com> (raw)
In-Reply-To: <20171010145353.do7b6msel3d25pyu@bivouac.eciton.net>

Hi Ard,

2017-10-10 16:53 GMT+02:00 Leif Lindholm <leif.lindholm@linaro.org>:
> On Mon, Oct 09, 2017 at 07:00:57PM +0200, Marcin Wojtas wrote:
>> From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
>>
>> The GIC architecture mandates that the CPU interface, which consists
>> of 2 consecutive 4 KB frames, can be mapped using separate mappings.
>> Since this is problematic on 64 KB pages, the MMU-400 aliases each
>> frame 16 times, and the two consecutive frames can be found at offset
>> 0xf000. This patch is intended to expose correct GICC alias via
>> MADT, once ACPI support is added.
>
> I'm afraid I don't quite understand this message.
>
> The change seems to be that the InterfaceBase moves from the first 4KB
> alias inside a 64KB page to the last alias within the same page.
> That seems valid, but I don't see how it resolves anything described
> in this message?
>

Can you recall what issue was fixed thanks to this patch?

Best regards,
Marcin


  reply	other threads:[~2017-10-10 14:52 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-09 17:00 [platforms: PATCH 00/13] Armada 7k/8k - misc improvements Marcin Wojtas
2017-10-09 17:00 ` [platforms: PATCH 01/13] Marvell/Armada: Introduce platform initialization driver Marcin Wojtas
2017-10-10 14:37   ` Leif Lindholm
2017-10-10 14:45     ` Marcin Wojtas
2017-10-10 15:03       ` Leif Lindholm
2017-10-10 15:06         ` Marcin Wojtas
2017-10-10 15:26           ` Leif Lindholm
2017-10-10 20:36             ` Ard Biesheuvel
2017-10-11  4:53               ` Marcin Wojtas
2017-10-11  8:32                 ` Leif Lindholm
2017-10-11  8:43                   ` Marcin Wojtas
2017-10-11  9:14                     ` Leif Lindholm
2017-10-11  9:16                       ` Marcin Wojtas
2017-10-09 17:00 ` [platforms: PATCH 02/13] Marvell/Armada: Switch to dynamic PCDs Marcin Wojtas
2017-10-10 14:38   ` Leif Lindholm
2017-10-09 17:00 ` [platforms: PATCH 03/13] Marvell/Armada: Armada70x0Lib: Terminate call stack list at entry Marcin Wojtas
2017-10-10 14:39   ` Leif Lindholm
2017-10-09 17:00 ` [platforms: PATCH 04/13] Marvell/Armada: Armada70x0Lib: Clean FV in the D-cache before boot Marcin Wojtas
2017-10-10 14:43   ` Leif Lindholm
2017-10-10 14:50     ` Marcin Wojtas
2017-10-10 15:29       ` Leif Lindholm
2017-10-10 20:39         ` Ard Biesheuvel
2017-10-09 17:00 ` [platforms: PATCH 05/13] Marvell/Armada: Use 4k/64k aligned sections for DXE/DXE-rt modules Marcin Wojtas
2017-10-10 14:44   ` Leif Lindholm
2017-10-09 17:00 ` [platforms: PATCH 06/13] Marvell/Armada: Switch to generic BDS Marcin Wojtas
2017-10-10 14:45   ` Leif Lindholm
2017-10-09 17:00 ` [platforms: PATCH 07/13] Marvell/Armada: Re-enable driver model diagnostics PCDs Marcin Wojtas
2017-10-10 14:46   ` Leif Lindholm
2017-10-09 17:00 ` [platforms: PATCH 08/13] Marvell/Armada: Modify GICC alias Marcin Wojtas
2017-10-10 14:53   ` Leif Lindholm
2017-10-10 14:56     ` Marcin Wojtas [this message]
2017-10-10 20:45       ` Ard Biesheuvel
2017-10-10 21:10         ` Leif Lindholm
2017-10-09 17:00 ` [platforms: PATCH 09/13] Marvell/Armada: Disable PerformanceLibrary Marcin Wojtas
2017-10-10 14:54   ` Leif Lindholm
2017-10-09 17:00 ` [platforms: PATCH 10/13] Marvell/Armada: Switch to unicore PrePi Marcin Wojtas
2017-10-10 14:54   ` Leif Lindholm
2017-10-09 17:01 ` [platforms: PATCH 11/13] Marvell/Armada: Remove outdated SEC alignment override Marcin Wojtas
2017-10-10 14:58   ` Leif Lindholm
2017-10-10 15:03     ` Marcin Wojtas
2017-10-09 17:01 ` [platforms: PATCH 12/13] Marvell/Armada: Add the UefiPxeBcDxe driver Marcin Wojtas
2017-10-10 14:59   ` Leif Lindholm
2017-10-09 17:01 ` [platforms: PATCH 13/13] Marvell/Documentation: Follow EDK2 coding style in the PortingGuide Marcin Wojtas
2017-10-10 14:59   ` Leif Lindholm

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