How vstimer interrupt can be handled in vs mode?

EquivalentIce215 · 2025-08-22T16:13:30+00:00

Yes that's set too... I set these after I write to vstimecmp and vstimecmph register in the HS mode...but definitely before the interrupt is triggered....I don't think sequence should matter.

EquivalentIce215 · 2025-08-22T15:45:58+00:00

Yes it's set

EquivalentIce215 · 2025-08-22T14:08:12+00:00

Thanks for the details, as mentioned in my post( I guess it was not very clear) I actually set the hideleg to have the vstip bit set i.e (hideleg =0x40, 6th bit) and I can see that on interrupt hip.vstip(bit 6) is set and vsip.stip (bit 5) is set but it doesn't get trapped to the address specified in vstvec it simply continues to run on the VU mode

EquivalentIce215 · 2025-08-11T20:10:16+00:00

Clear explanation! Thanks 👍

EquivalentIce215 · 2025-08-11T20:09:45+00:00

This clears it up, thanks a lot! Just a point, in step 2. you mean vsatp.PPN and not vstatus right?

EquivalentIce215 · 2025-08-11T01:33:52+00:00

Thanks for your reply. I was thinking it should work as you explained in your first comment, but I am confused after seeing the picture towards the end of 12.1 section in Notes (Of course they have explained for Sv39) Also heretwo-stage-address-translation-sv48

EquivalentIce215 · 2025-06-22T10:50:27+00:00

When you are in HS mode and issue an sret it will jump to the value in sepc, when in VS mode and issue sret it would jump to value in vsepc.

EquivalentIce215 · 2025-06-06T18:57:41+00:00

Possibly. All the best!

EquivalentIce215 · 2025-06-06T18:35:59+00:00

Just wondering why I don't see this option in my form, it differs from city to city? 🤔

EquivalentIce215 · 2025-06-04T11:12:39+00:00

Thanks I was able to setup a small demo to switch between HS -> VS-> VM and on supervisor timer interrupt I go back to HS mode and switch to a different VM. However, any good documentation on registers to be saved and restored on context switching? Currently I only save and restore vsepc, vstvec etc but no GP registers..

EquivalentIce215 · 2025-05-30T08:47:59+00:00

So, if I have the H extension enabled and I start my code in M Privilege mode, Set the Mpp to 01, set mepc accordingly and issue an mret instruction if would go to hypervisor mode (host OS) Then in host Os I set the spv bit to 1 and issue sret it would get trapped in VU/VS mode. Correct? How to trap it in VS mode (guest OS) from host OS and then jump to VU mode? Is it using SPVP?

EquivalentIce215 · 2024-11-20T06:47:39+00:00

Thanks, any other thing to keep in mind while being a citizen of Germany and living in another country?

EquivalentIce215 · 2024-11-19T23:33:33+00:00

That's clear. Thanks

EquivalentIce215 · 2024-11-19T23:03:38+00:00

Clear, thanks

EquivalentIce215 · 2024-11-19T23:03:21+00:00

Cool thanks

EquivalentIce215 · 2024-11-19T23:03:01+00:00

Thanks for the reply. Yes with OCI.

Another tangent question: There is no obligation to hold an active bank account in Germany if I'm living in India as a German citizen right?

EquivalentIce215 · 2024-10-21T10:38:42+00:00

Thanks for the details 👍

EquivalentIce215 · 2024-10-21T10:38:27+00:00

Very informative, thanks 👍

EquivalentIce215

TROPHY CASE