this patch reserves the IOVA for PCI masters.
ARM64 based SOCs may have scattered memory banks.
such as iproc based SOC has
<0x 0x8000 0x0 0x8000>, /* 2G @ 2G */
<0x0008 0x8000 0x3 0x8000>, /* 14G @ 34G */
<0x0090 0x 0x4 0x>, /* 16G @ 576G */
this patch reserves the IOVA for PCI masters.
ARM64 based SOCs may have scattered memory banks.
such as iproc based SOC has
<0x 0x8000 0x0 0x8000>, /* 2G @ 2G */
<0x0008 0x8000 0x3 0x8000>, /* 14G @ 34G */
<0x0090 0x 0x4 0x>, /* 16G @ 576G */
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