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Re: [Qemu-devel] [RFC PATCH 0/4] Qemu: Add Xen vIOMMU support
From: |
Lan Tianyu |
Subject: |
Re: [Qemu-devel] [RFC PATCH 0/4] Qemu: Add Xen vIOMMU support |
Date: |
Tue, 21 Mar 2017 09:13:11 +0800 |
User-agent: |
Mozilla/5.0 (X11; Linux i686 on x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0 |
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
- [Qemu-devel] [RFC PATCH 3/4] xen-pt: bind/unbind interrupt remapping format MSI, (continued)
- [Qemu-devel] [RFC PATCH 3/4] xen-pt: bind/unbind interrupt remapping format MSI, Lan Tianyu, 2017/03/17
- [Qemu-devel] [RFC PATCH 2/4] Xen: add a dummy vIOMMU to create/destroy vIOMMU in Xen, Lan Tianyu, 2017/03/17
- [Qemu-devel] [RFC PATCH 4/4] msi: taking interrupt format into consideration during judging a pirq is binded with a event channel, Lan Tianyu, 2017/03/17
- Re: [Qemu-devel] [RFC PATCH 0/4] Qemu: Add Xen vIOMMU support, no-reply, 2017/03/17
- Re: [Qemu-devel] [RFC PATCH 0/4] Qemu: Add Xen vIOMMU support, Paolo Bonzini, 2017/03/17