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From: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: Ard Biesheuvel <ardb@kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>,
	Veronika kabatova <vkabatov@redhat.com>,
	Robin Murphy <robin.murphy@arm.com>,
	Will Deacon <will@kernel.org>, Hanjun Guo <guohanjun@huawei.com>,
	Sudeep Holla <sudeep.holla@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>
Subject: Re: [PATCH v2 1/3] ACPI: osl: Add __force attribute in acpi_os_map_iomem() cast
Date: Wed, 11 Aug 2021 15:55:08 +0100	[thread overview]
Message-ID: <20210811145508.GA3650@lpieralisi> (raw)
In-Reply-To: <YRPZ2Kqb/MFggHzQ@infradead.org>

On Wed, Aug 11, 2021 at 03:08:24PM +0100, Christoph Hellwig wrote:
> On Wed, Aug 11, 2021 at 12:40:28PM +0200, Ard Biesheuvel wrote:
> > The whole problem we are solving here is that ACPI, being based on
> > x86, conflates MMIO mappings with memory mappings, and has been using
> > the same underlying infrastructure for either.
> 
> So let's fix that problem instead of papering over it.

Patch (3) in this series is a fix - I would ask whether it makes
sense to merge patches (2-3) now and think about reworking the current
ACPI IO/MEM mapping API later, it can be an invasive change for a fix,
assuming we agree on how to rework the ACPI IO/MEM mapping API.

Lorenzo

WARNING: multiple messages have this Message-ID (diff)
From: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: Ard Biesheuvel <ardb@kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>,
	Veronika kabatova <vkabatov@redhat.com>,
	Robin Murphy <robin.murphy@arm.com>,
	Will Deacon <will@kernel.org>, Hanjun Guo <guohanjun@huawei.com>,
	Sudeep Holla <sudeep.holla@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>
Subject: Re: [PATCH v2 1/3] ACPI: osl: Add __force attribute in acpi_os_map_iomem() cast
Date: Wed, 11 Aug 2021 15:55:08 +0100	[thread overview]
Message-ID: <20210811145508.GA3650@lpieralisi> (raw)
In-Reply-To: <YRPZ2Kqb/MFggHzQ@infradead.org>

On Wed, Aug 11, 2021 at 03:08:24PM +0100, Christoph Hellwig wrote:
> On Wed, Aug 11, 2021 at 12:40:28PM +0200, Ard Biesheuvel wrote:
> > The whole problem we are solving here is that ACPI, being based on
> > x86, conflates MMIO mappings with memory mappings, and has been using
> > the same underlying infrastructure for either.
> 
> So let's fix that problem instead of papering over it.

Patch (3) in this series is a fix - I would ask whether it makes
sense to merge patches (2-3) now and think about reworking the current
ACPI IO/MEM mapping API later, it can be an invasive change for a fix,
assuming we agree on how to rework the ACPI IO/MEM mapping API.

Lorenzo

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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2021-08-11 14:55 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-26 10:00 [PATCH] ACPI: Add memory semantics to acpi_os_map_memory() Lorenzo Pieralisi
2021-07-26 10:00 ` Lorenzo Pieralisi
2021-07-26 15:55 ` Ard Biesheuvel
2021-07-26 15:55   ` Ard Biesheuvel
2021-07-27 10:06   ` Lorenzo Pieralisi
2021-07-27 10:06     ` Lorenzo Pieralisi
2021-07-27 10:09     ` Ard Biesheuvel
2021-07-27 10:09       ` Ard Biesheuvel
2021-07-27 16:38       ` Lorenzo Pieralisi
2021-07-27 16:38         ` Lorenzo Pieralisi
2021-07-27  4:21 ` Hanjun Guo
2021-07-27  4:21   ` Hanjun Guo
2021-08-02 15:23 ` [PATCH v2 0/3] ACPI: Fix acpi_os_map_memory() memory semantics Lorenzo Pieralisi
2021-08-02 15:23   ` Lorenzo Pieralisi
2021-08-02 15:37   ` Ard Biesheuvel
2021-08-02 15:37     ` Ard Biesheuvel
2021-08-23 10:35   ` [PATCH v3] ACPI: Add memory semantics to acpi_os_map_memory() Lorenzo Pieralisi
2021-08-23 10:46   ` [PATCH RESEND " Lorenzo Pieralisi
2021-08-23 10:46     ` Lorenzo Pieralisi
2021-08-23 12:30     ` Catalin Marinas
2021-08-23 12:30       ` Catalin Marinas
2021-08-25 17:46       ` Rafael J. Wysocki
2021-08-25 17:46         ` Rafael J. Wysocki
2021-08-02 15:23 ` [PATCH v2 1/3] ACPI: osl: Add __force attribute in acpi_os_map_iomem() cast Lorenzo Pieralisi
2021-08-02 15:23   ` Lorenzo Pieralisi
2021-08-10 16:45   ` Christoph Hellwig
2021-08-10 16:45     ` Christoph Hellwig
2021-08-11 10:40     ` Ard Biesheuvel
2021-08-11 10:40       ` Ard Biesheuvel
2021-08-11 14:01       ` Lorenzo Pieralisi
2021-08-11 14:01         ` Lorenzo Pieralisi
2021-08-11 14:08       ` Christoph Hellwig
2021-08-11 14:08         ` Christoph Hellwig
2021-08-11 14:55         ` Lorenzo Pieralisi [this message]
2021-08-11 14:55           ` Lorenzo Pieralisi
2021-08-16  9:58           ` Lorenzo Pieralisi
2021-08-16  9:58             ` Lorenzo Pieralisi
2021-08-16 10:21             ` Ard Biesheuvel
2021-08-16 10:21               ` Ard Biesheuvel
2021-08-16 10:59               ` Robin Murphy
2021-08-16 10:59                 ` Robin Murphy
2021-08-16 13:57               ` Rafael J. Wysocki
2021-08-16 13:57                 ` Rafael J. Wysocki
2021-08-02 15:23 ` [PATCH v2 2/3] ACPI: osl: Reorder acpi_os_map_iomem() __ref annotation Lorenzo Pieralisi
2021-08-02 15:23   ` Lorenzo Pieralisi
2021-08-02 15:23 ` [PATCH v2 3/3] ACPI: Add memory semantics to acpi_os_map_memory() Lorenzo Pieralisi
2021-08-02 15:23   ` Lorenzo Pieralisi
2021-08-02 16:46   ` Catalin Marinas
2021-08-02 16:46     ` Catalin Marinas
2021-08-03  9:16     ` Lorenzo Pieralisi
2021-08-03  9:16       ` Lorenzo Pieralisi
2021-08-05 19:02       ` Rafael J. Wysocki
2021-08-05 19:02         ` Rafael J. Wysocki

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