From: Lan Tianyu <tianyu.lan@intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
qemu-devel@nongnu.org, xen-devel@lists.xensource.com
Cc: chao.gao@intel.com, kevin.tian@intel.com,
anthony.perard@citrix.com, ehabkost@redhat.com,
marcel@redhat.com, mst@redhat.com, rth@twiddle.net,
sstabellini@kernel.org
Subject: Re: [Qemu-devel] [RFC PATCH 0/4] Qemu: Add Xen vIOMMU support
Date: Tue, 21 Mar 2017 09:13:11 +0800 [thread overview]
Message-ID: <fbeeaf60-d19e-26ce-a119-b9b84b96fd47@intel.com> (raw)
In-Reply-To: <0542a688-deaf-001b-9f64-9e8f30c4ead3@redhat.com>
On 2017年03月20日 19:38, Paolo Bonzini wrote:
> Fair enough, though I'd be worried about increasing the attack surface
> of the hypervisor. For KVM, for example, IOMMU emulation requires using
> the "split irqchip" feature to move the PIC and IOAPIC out of the kernel
> and back to QEMU.
Yes, just like Roger mentioned we also need to support no-qemu mode on
Xen and this is tradeoff result.
>
> Also, I think this series is missing changes to support IOMMU
> translation in the vIOMMU device model.
Yes, this series just enabled vIOMMU's irq remapping function and we
need to pass virtual device's DMA request to Xen hypervisor for
translation when enable DMA translation.
--
Best regards
Tianyu Lan
prev parent reply other threads:[~2017-03-21 1:20 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-17 11:29 [Qemu-devel] [RFC PATCH 0/4] Qemu: Add Xen vIOMMU support Lan Tianyu
2017-03-17 11:29 ` [Qemu-devel] [RFC PATCH 1/4] I440: Allow adding sysbus devices with -device on I440 Lan Tianyu
2017-03-20 19:49 ` Eduardo Habkost
2017-03-21 0:36 ` Lan Tianyu
2017-03-17 11:29 ` [Qemu-devel] [RFC PATCH 2/4] Xen: add a dummy vIOMMU to create/destroy vIOMMU in Xen Lan Tianyu
2017-03-30 16:24 ` Anthony PERARD
2017-03-30 20:19 ` Chao Gao
2017-03-17 11:29 ` [Qemu-devel] [RFC PATCH 3/4] xen-pt: bind/unbind interrupt remapping format MSI Lan Tianyu
2017-03-30 16:51 ` Anthony PERARD
2017-03-30 20:31 ` Chao Gao
2017-03-17 11:29 ` [Qemu-devel] [RFC PATCH 4/4] msi: taking interrupt format into consideration during judging a pirq is binded with a event channel Lan Tianyu
2017-03-30 17:29 ` Anthony PERARD
2017-03-30 20:38 ` Chao Gao
2017-03-17 11:46 ` [Qemu-devel] [RFC PATCH 0/4] Qemu: Add Xen vIOMMU support no-reply
2017-03-17 14:48 ` Paolo Bonzini
2017-03-17 20:57 ` Stefano Stabellini
2017-03-20 2:40 ` Lan Tianyu
2017-03-20 11:38 ` Paolo Bonzini
2017-03-20 14:17 ` [Qemu-devel] [Xen-devel] " Roger Pau Monné
2017-03-20 14:35 ` Paolo Bonzini
2017-03-21 1:13 ` Lan Tianyu [this message]
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