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638 B
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16 lines
638 B
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Virtual Accelerator Switchboard (VAS)
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This document provides information about using VAS from user space.
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Applications send NX requests using COPY/PASTE instructions. NX raises
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an interrupt when it sees fault on the request buffer. Kernel handles
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the interrupt and process the fault.
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Skiboot allocates the IRQ and exports it with interrupts property. To
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provide backward compatibility for older kernels, enable VAS user space
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support with NVRAM command.
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nvram -p ibm,skiboot --update-config vas-user-space=enable
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This nvram config update is temporary and can be removed in future if
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not needed.
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