From: Christoph Hellwig <hch@lst.de>
To: Will Deacon <will@kernel.org>
Cc: Shawn Anastasio <shawn@anastas.io>,
linux-m68k@lists.linux-m68k.org,
Catalin Marinas <catalin.marinas@arm.com>,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
Russell King <linux@armlinux.org.uk>,
linux-mips@vger.kernel.org, iommu@lists.linux-foundation.org,
Geert Uytterhoeven <geert@linux-m68k.org>,
Paul Burton <paul.burton@mips.com>,
James Hogan <jhogan@kernel.org>, Guan Xuetao <gxt@pku.edu.cn>,
Christoph Hellwig <hch@lst.de>,
linux-arm-kernel@lists.infradead.org,
Robin Murphy <robin.murphy@arm.com>
Subject: Re: [PATCH 6/6] arm64: document the choice of page attributes for pgprot_dmacoherent
Date: Fri, 16 Aug 2019 19:59:42 +0200 [thread overview]
Message-ID: <20190816175942.GA4879@lst.de> (raw)
In-Reply-To: <20190816173118.4rbbzuogfamfa554@willie-the-truck>
On Fri, Aug 16, 2019 at 06:31:18PM +0100, Will Deacon wrote:
> Mind if I tweak the second sentence to be:
>
> This is different from "Device-nGnR[nE]" memory which is intended for MMIO
> and thus forbids speculation, preserves access size, requires strict
> alignment and can also force write responses to come from the endpoint.
>
> ? It's a small change, but it better fits with the arm64 terminology
> ("strongly ordered" is no longer used in the architecture).
>
> If you're happy with that, I can make the change and queue this patch
> for 5.4.
I'm fine with the change, but you really need this series as base,
as there is no pgprot_dmacoherent before the series. So I think I'll
have to queue it up if we want it for 5.4, and I'll need a few more
reviews for the other patches in this series first.
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Will Deacon <will@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>,
iommu@lists.linux-foundation.org, Guan Xuetao <gxt@pku.edu.cn>,
Shawn Anastasio <shawn@anastas.io>,
Russell King <linux@armlinux.org.uk>,
Catalin Marinas <catalin.marinas@arm.com>,
Robin Murphy <robin.murphy@arm.com>,
Paul Burton <paul.burton@mips.com>,
James Hogan <jhogan@kernel.org>,
Geert Uytterhoeven <geert@linux-m68k.org>,
linuxppc-dev@lists.ozlabs.org, linux-mips@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-m68k@lists.linux-m68k.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 6/6] arm64: document the choice of page attributes for pgprot_dmacoherent
Date: Fri, 16 Aug 2019 19:59:42 +0200 [thread overview]
Message-ID: <20190816175942.GA4879@lst.de> (raw)
In-Reply-To: <20190816173118.4rbbzuogfamfa554@willie-the-truck>
On Fri, Aug 16, 2019 at 06:31:18PM +0100, Will Deacon wrote:
> Mind if I tweak the second sentence to be:
>
> This is different from "Device-nGnR[nE]" memory which is intended for MMIO
> and thus forbids speculation, preserves access size, requires strict
> alignment and can also force write responses to come from the endpoint.
>
> ? It's a small change, but it better fits with the arm64 terminology
> ("strongly ordered" is no longer used in the architecture).
>
> If you're happy with that, I can make the change and queue this patch
> for 5.4.
I'm fine with the change, but you really need this series as base,
as there is no pgprot_dmacoherent before the series. So I think I'll
have to queue it up if we want it for 5.4, and I'll need a few more
reviews for the other patches in this series first.
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Will Deacon <will@kernel.org>
Cc: Shawn Anastasio <shawn@anastas.io>,
linux-m68k@lists.linux-m68k.org,
Catalin Marinas <catalin.marinas@arm.com>,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
Russell King <linux@armlinux.org.uk>,
linux-mips@vger.kernel.org, iommu@lists.linux-foundation.org,
Geert Uytterhoeven <geert@linux-m68k.org>,
Paul Burton <paul.burton@mips.com>,
James Hogan <jhogan@kernel.org>, Guan Xuetao <gxt@pku.edu.cn>,
Christoph Hellwig <hch@lst.de>,
linux-arm-kernel@lists.infradead.org,
Robin Murphy <robin.murphy@arm.com>
Subject: Re: [PATCH 6/6] arm64: document the choice of page attributes for pgprot_dmacoherent
Date: Fri, 16 Aug 2019 19:59:42 +0200 [thread overview]
Message-ID: <20190816175942.GA4879@lst.de> (raw)
In-Reply-To: <20190816173118.4rbbzuogfamfa554@willie-the-truck>
On Fri, Aug 16, 2019 at 06:31:18PM +0100, Will Deacon wrote:
> Mind if I tweak the second sentence to be:
>
> This is different from "Device-nGnR[nE]" memory which is intended for MMIO
> and thus forbids speculation, preserves access size, requires strict
> alignment and can also force write responses to come from the endpoint.
>
> ? It's a small change, but it better fits with the arm64 terminology
> ("strongly ordered" is no longer used in the architecture).
>
> If you're happy with that, I can make the change and queue this patch
> for 5.4.
I'm fine with the change, but you really need this series as base,
as there is no pgprot_dmacoherent before the series. So I think I'll
have to queue it up if we want it for 5.4, and I'll need a few more
reviews for the other patches in this series first.
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Will Deacon <will@kernel.org>
Cc: Shawn Anastasio <shawn@anastas.io>,
linux-m68k@lists.linux-m68k.org,
Catalin Marinas <catalin.marinas@arm.com>,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
Russell King <linux@armlinux.org.uk>,
linux-mips@vger.kernel.org, iommu@lists.linux-foundation.org,
Geert Uytterhoeven <geert@linux-m68k.org>,
Paul Burton <paul.burton@mips.com>,
James Hogan <jhogan@kernel.org>, Guan Xuetao <gxt@pku.edu.cn>,
Christoph Hellwig <hch@lst.de>,
linux-arm-kernel@lists.infradead.org,
Robin Murphy <robin.murphy@arm.com>
Subject: Re: [PATCH 6/6] arm64: document the choice of page attributes for pgprot_dmacoherent
Date: Fri, 16 Aug 2019 19:59:42 +0200 [thread overview]
Message-ID: <20190816175942.GA4879@lst.de> (raw)
In-Reply-To: <20190816173118.4rbbzuogfamfa554@willie-the-truck>
On Fri, Aug 16, 2019 at 06:31:18PM +0100, Will Deacon wrote:
> Mind if I tweak the second sentence to be:
>
> This is different from "Device-nGnR[nE]" memory which is intended for MMIO
> and thus forbids speculation, preserves access size, requires strict
> alignment and can also force write responses to come from the endpoint.
>
> ? It's a small change, but it better fits with the arm64 terminology
> ("strongly ordered" is no longer used in the architecture).
>
> If you're happy with that, I can make the change and queue this patch
> for 5.4.
I'm fine with the change, but you really need this series as base,
as there is no pgprot_dmacoherent before the series. So I think I'll
have to queue it up if we want it for 5.4, and I'll need a few more
reviews for the other patches in this series first.
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-08-16 17:59 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-16 7:07 cleanup the dma_pgprot handling Christoph Hellwig
2019-08-16 7:07 ` Christoph Hellwig
2019-08-16 7:07 ` Christoph Hellwig
2019-08-16 7:07 ` Christoph Hellwig
2019-08-16 7:07 ` [PATCH 1/6] MIPS: remove support for DMA_ATTR_WRITE_COMBINE Christoph Hellwig
2019-08-16 7:07 ` Christoph Hellwig
2019-08-16 7:07 ` Christoph Hellwig
2019-08-16 7:07 ` Christoph Hellwig
2019-08-16 7:07 ` [PATCH 2/6] unicore32: remove the unused pgprot_dmacoherent define Christoph Hellwig
2019-08-16 7:07 ` Christoph Hellwig
2019-08-16 7:07 ` Christoph Hellwig
2019-08-16 7:07 ` Christoph Hellwig
2019-08-16 7:07 ` [PATCH 3/6] arm-nommu: " Christoph Hellwig
2019-08-16 7:07 ` Christoph Hellwig
2019-08-16 7:07 ` Christoph Hellwig
2019-08-16 7:07 ` Christoph Hellwig
2019-08-16 7:07 ` [PATCH 4/6] dma-mapping: remove arch_dma_mmap_pgprot Christoph Hellwig
2019-08-16 7:07 ` Christoph Hellwig
2019-08-16 7:07 ` Christoph Hellwig
2019-08-16 7:07 ` Christoph Hellwig
2019-08-16 7:43 ` Geert Uytterhoeven
2019-08-16 7:43 ` Geert Uytterhoeven
2019-08-16 7:43 ` Geert Uytterhoeven
2019-08-16 7:43 ` Geert Uytterhoeven
2019-08-16 7:07 ` [PATCH 5/6] dma-mapping: make dma_atomic_pool_init self-contained Christoph Hellwig
2019-08-16 7:07 ` Christoph Hellwig
2019-08-16 7:07 ` Christoph Hellwig
2019-08-16 7:07 ` Christoph Hellwig
2019-08-16 7:07 ` [PATCH 6/6] arm64: document the choice of page attributes for pgprot_dmacoherent Christoph Hellwig
2019-08-16 7:07 ` Christoph Hellwig
2019-08-16 7:07 ` Christoph Hellwig
2019-08-16 7:07 ` Christoph Hellwig
2019-08-16 17:31 ` Will Deacon
2019-08-16 17:31 ` Will Deacon
2019-08-16 17:31 ` Will Deacon
2019-08-16 17:31 ` Will Deacon
2019-08-16 17:36 ` Mark Rutland
2019-08-16 17:36 ` Mark Rutland
2019-08-16 17:36 ` Mark Rutland
2019-08-16 17:36 ` Mark Rutland
2019-08-16 17:59 ` Christoph Hellwig [this message]
2019-08-16 17:59 ` Christoph Hellwig
2019-08-16 17:59 ` Christoph Hellwig
2019-08-16 17:59 ` Christoph Hellwig
2019-08-16 18:05 ` Will Deacon
2019-08-16 18:05 ` Will Deacon
2019-08-16 18:05 ` Will Deacon
2019-08-16 18:05 ` Will Deacon
2019-08-23 21:58 ` cleanup the dma_pgprot handling Paul Burton
2019-08-23 21:58 ` Paul Burton
2019-08-23 21:58 ` Paul Burton
2019-08-23 21:58 ` Paul Burton
2019-08-24 22:34 ` Christoph Hellwig
2019-08-24 22:34 ` Christoph Hellwig
2019-08-24 22:34 ` Christoph Hellwig
2019-08-24 22:34 ` Christoph Hellwig
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