[SPDK] restricting SPDK/DPDK memory allcoation

[SPDK] restricting SPDK/DPDK memory allcoation

[Oza Oza]

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Hi,



How do I ask SPDK/DPDK to restrict the iova and phys_addr allocation to
first 128 GB of its address space ?



In short I want to restrict



Function: vfio_type1_dma_map

dma_map.vaddr = ms[i].addr_64;

dma_map.iova = ms[i].phys_addr;



iova address which gets programmed in iommu restricted to first 128 GB of
space ?



I am using ARM64 port, but it should not have anything to do with
architecture anyway.



Regards,

Oza.

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Re: [SPDK] restricting SPDK/DPDK memory allcoation

[Oza Oza]

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I see that rte_eal_get_physmem_layout is the one gets physical memory
layout.

But not sure where does it get it from and if it depends on say 64bit
architecture or just some config !



*From:* Oza Oza [mailto:oza.oza(a)broadcom.com]
*Sent:* Thursday, April 27, 2017 1:29 AM
*To:* 'Storage Performance Development Kit'
*Subject:* restricting SPDK/DPDK memory allcoation



Hi,



How do I ask SPDK/DPDK to restrict the iova and phys_addr allocation to
first 128 GB of its address space ?



In short I want to restrict



Function: vfio_type1_dma_map

dma_map.vaddr = ms[i].addr_64;

dma_map.iova = ms[i].phys_addr;



iova address which gets programmed in iommu restricted to first 128 GB of
space ?



I am using ARM64 port, but it should not have anything to do with
architecture anyway.



Regards,

Oza.

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