From: Zhong Yang <yang.zhong@intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>, qemu-devel@nongnu.org
Cc: xiaoguangrong.eric@gmail.com, ehabkost@redhat.com,
alex.williamson@redhat.com, anthony.xu@intel.com,
yang.zhong@intel.com
Subject: Re: [Qemu-devel] [PATCH 0/2] add "nopin" option in the memory-backend-file
Date: Wed, 18 Oct 2017 17:56:42 +0800 [thread overview]
Message-ID: <20171018095642.GA5442@yangzhon-Virtual> (raw)
In-Reply-To: <1ecf42be-b0e6-43a1-8747-c94425ded449@redhat.com>
On Wed, Oct 18, 2017 at 11:48:11AM +0200, Paolo Bonzini wrote:
> On 18/10/2017 07:57, Zhong Yang wrote:
> > Your suggestion can avoid DMA target to nvdimm if the nvdimm memory region
> > was skipped during VFIO hotplug. It is valuable to try this solution. by the
> > way, please share me some clue for PCI address space related with memory region,
> > below address_space_mem is right? Many thanks!
> >
> > static void pci_bus_init(PCIBus *bus, DeviceState *parent,
> > MemoryRegion *address_space_mem,
> > MemoryRegion *address_space_io,
> > uint8_t devfn_min)
>
> Yes. You would have to add the region directly to the CPU address
> space, and not to address_space_memory (which is included in both the
> CPU and PCI address spaces).
>
> Paolo
Thanks Paolo for your great help! I will try this solution in next week, thanks again.
Regards,
Yang
next prev parent reply other threads:[~2017-10-18 9:57 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-16 8:56 [Qemu-devel] [PATCH 0/2] add "nopin" option in the memory-backend-file Yang Zhong
2017-10-16 8:56 ` [Qemu-devel] [PATCH 1/2] hostmem-file: Add "nopin" option for memory-backend-file Yang Zhong
2017-10-16 8:56 ` [Qemu-devel] [PATCH 2/2] nvdimm: Add "nopin" for related documents Yang Zhong
2017-10-16 10:20 ` [Qemu-devel] [PATCH 0/2] add "nopin" option in the memory-backend-file Xiao Guangrong
2017-10-16 11:58 ` Paolo Bonzini
2017-10-18 5:57 ` Zhong Yang
2017-10-18 9:48 ` Paolo Bonzini
2017-10-18 9:56 ` Zhong Yang [this message]
2017-10-18 5:34 ` Zhong Yang
2017-10-16 15:47 ` Alex Williamson
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