On 13/02/2018 23:05, dann frazier wrote:

quoted

 	bool

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+config INDIRECT_PIO
+	bool "Access I/O in non-MMIO mode"
+	depends on ARM64
+	help
+	  On some platforms where no separate I/O space exists, there are I/O
+	  hosts which can not be accessed in MMIO mode. Using the logical PIO
+	  mechanism, the host-local I/O resource can be mapped into system
+	  logic PIO space shared with MMIO hosts, such as PCI/PCIE, then the
+	  system can access the I/O devices with the mapped logic PIO through
+	  I/O accessors.
+	  This way has a relatively little I/O performance cost. Please make

grammar nit - s/a relatively/relatively/

Fine, thanks

John

  -dann

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+	  sure your devices really need this configure item enabled.
+