From: Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>
To: Baptiste Reynal
<b.reynal-lrHrjnjw1UfHK3s98zE1ajGjJy/sRE9J@public.gmane.org>
Cc: "iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org"
<iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>,
"tech-lrHrjnjw1UfHK3s98zE1ajGjJy/sRE9J@public.gmane.org"
<tech-lrHrjnjw1UfHK3s98zE1ajGjJy/sRE9J@public.gmane.org>,
"qemu-devel-qX2TKyscuCcdnm+yROfE0A@public.gmane.org"
<qemu-devel-qX2TKyscuCcdnm+yROfE0A@public.gmane.org>
Subject: Re: [RFC 0/6] vSMMU initialization
Date: Fri, 12 Jun 2015 15:23:29 +0100 [thread overview]
Message-ID: <20150612142328.GF12174@arm.com> (raw)
In-Reply-To: <1434118810-28219-1-git-send-email-b.reynal-lrHrjnjw1UfHK3s98zE1ajGjJy/sRE9J@public.gmane.org>
On Fri, Jun 12, 2015 at 03:20:04PM +0100, Baptiste Reynal wrote:
> The ARM SMMU has support for 2-stages address translations, allowing a virtual
> address to be translated at two levels:
> - Stage 1 translates a virtual address (VA) into an intermediate physical
> address (IPA)
> - Stage 2 translates an IPA into a physical address (PA)
>
> Will Deacon introduced a virtual SMMU interface for KVM, which gives a virtual
> machine the possibility to use an IOMMU with native drivers. While the VM will
> program the first stage of translation (stage 1), the interface will program
> the second (stage 2) on the physical SMMU.
Please note that I have no plans to merge the kernel-side of this at the
moment. It was merely an exploratory tool to see what a non-PV vSMMU
implementation might look like and certainly not intended to be used in
anger.
Will
WARNING: multiple messages have this Message-ID (diff)
From: Will Deacon <will.deacon@arm.com>
To: Baptiste Reynal <b.reynal@virtualopensystems.com>
Cc: "iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>,
"tech@virtualopensystems.com" <tech@virtualopensystems.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [RFC 0/6] vSMMU initialization
Date: Fri, 12 Jun 2015 15:23:29 +0100 [thread overview]
Message-ID: <20150612142328.GF12174@arm.com> (raw)
In-Reply-To: <1434118810-28219-1-git-send-email-b.reynal@virtualopensystems.com>
On Fri, Jun 12, 2015 at 03:20:04PM +0100, Baptiste Reynal wrote:
> The ARM SMMU has support for 2-stages address translations, allowing a virtual
> address to be translated at two levels:
> - Stage 1 translates a virtual address (VA) into an intermediate physical
> address (IPA)
> - Stage 2 translates an IPA into a physical address (PA)
>
> Will Deacon introduced a virtual SMMU interface for KVM, which gives a virtual
> machine the possibility to use an IOMMU with native drivers. While the VM will
> program the first stage of translation (stage 1), the interface will program
> the second (stage 2) on the physical SMMU.
Please note that I have no plans to merge the kernel-side of this at the
moment. It was merely an exploratory tool to see what a non-PV vSMMU
implementation might look like and certainly not intended to be used in
anger.
Will
next prev parent reply other threads:[~2015-06-12 14:23 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-12 14:20 [RFC 0/6] vSMMU initialization Baptiste Reynal
2015-06-12 14:20 ` [Qemu-devel] " Baptiste Reynal
[not found] ` <1434118810-28219-1-git-send-email-b.reynal-lrHrjnjw1UfHK3s98zE1ajGjJy/sRE9J@public.gmane.org>
2015-06-12 14:20 ` [RFC 1/6] headers sync Baptiste Reynal
2015-06-12 14:20 ` [Qemu-devel] " Baptiste Reynal
2015-06-12 14:20 ` [RFC 2/6] hw/core/platform-bus: initialization notifier Baptiste Reynal
2015-06-12 14:20 ` [Qemu-devel] " Baptiste Reynal
2015-06-12 14:20 ` [RFC 3/6] hw/core/platform-bus: add base_address field Baptiste Reynal
2015-06-12 14:20 ` [Qemu-devel] " Baptiste Reynal
2015-06-12 14:20 ` [RFC 4/6] hw/vfio: vsmmu device Baptiste Reynal
2015-06-12 14:20 ` [Qemu-devel] " Baptiste Reynal
2015-06-12 14:20 ` [RFC 5/6] hw/arm/sysbus-fdt: enable vsmmu dynamic instantiation Baptiste Reynal
2015-06-12 14:20 ` [Qemu-devel] " Baptiste Reynal
2015-06-12 14:20 ` [RFC 6/6] hw/arm/sysbus-fdt: add smmu masters in device tree Baptiste Reynal
2015-06-12 14:20 ` [Qemu-devel] " Baptiste Reynal
2015-06-12 14:23 ` Will Deacon [this message]
2015-06-12 14:23 ` [Qemu-devel] [RFC 0/6] vSMMU initialization Will Deacon
[not found] ` <20150612142328.GF12174-5wv7dgnIgG8@public.gmane.org>
2015-07-14 2:21 ` Varun Sethi
2015-07-14 2:21 ` [Qemu-devel] " Varun Sethi
[not found] ` <BN1PR0301MB06274ACB3A193799F40BE9F4EA9B0-RQSpjbwlmjSD1ymB6+i1+JwN6zqB+hSMnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2015-07-14 11:04 ` Will Deacon
2015-07-14 11:04 ` [Qemu-devel] " Will Deacon
[not found] ` <20150714110416.GD16213-5wv7dgnIgG8@public.gmane.org>
2015-07-15 13:38 ` Baptiste Reynal
2015-07-15 13:38 ` [Qemu-devel] " Baptiste Reynal
[not found] ` <CAN9JPjF1E0Dg_KAQcc4C+jKDuOHEATVhN+1NPa66jLrP8RieKA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-07-15 13:42 ` Will Deacon
2015-07-15 13:42 ` [Qemu-devel] " Will Deacon
2015-07-15 16:41 ` Varun Sethi
2015-07-15 16:41 ` [Qemu-devel] " Varun Sethi
2015-07-15 17:28 ` Varun Sethi
2015-07-15 17:28 ` [Qemu-devel] " Varun Sethi
[not found] ` <BN1PR0301MB0627944BCFB295564CA1F7AAEA9A0-RQSpjbwlmjSD1ymB6+i1+JwN6zqB+hSMnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2015-07-15 17:37 ` Will Deacon
2015-07-15 17:37 ` [Qemu-devel] " Will Deacon
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