topic Which Interrupt Vector for Hypervisor Privelege Interrupt? in P-Series

Which Interrupt Vector for Hypervisor Privelege Interrupt?

mikelackey — Fri, 22 Jun 2018 14:52:22 GMT

Which interrupt vector is taken when s/w attempts to access hypervisor resource while in user/guest mode?

P4080 Ref Manual, Section 1.2.3.2, "Guest Supervisor State Considerations"

"Attempting to access hypervisor privileged resources and instructions will cause embedded hypervisor
privilege interrupts which the hypervisor can service on behalf of the guest to provide appropriate
emulation"

P4080 Ref Manual, Section 8.8, "Interrupt Definitions"

In Table 8.4, IVOR 41 is described as "Embedded Hypervisor Privilege"

Is IVOR41 invoked when use/guest code attempts to access hypervisor resource?

Or is it another interrupt, perhaps IVOR6 Described as "Program/Privileged"?

Re: Which Interrupt Vector for Hypervisor Privelege Interrupt?

Pavel — Thu, 28 Jun 2018 11:04:18 GMT

Look at the Section 4.9.19 of the E500MCRM, e500mc Core Reference Manual with Updates (REV 3):

https://www.nxp.com/docs/en/reference-manual/E500MCRM.pdf

This Section contains information about Hypervisor Privilege Interrupt - IVOR41.

Have a great day,
Pavel Chubakov

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Re: Which Interrupt Vector for Hypervisor Privelege Interrupt?

mikelackey — Thu, 28 Jun 2018 13:08:27 GMT

Thank you. Did not think to look at that manual, lesson learned. It's clearly spelled out as you mention.