Re: Extending the number of PMP entries
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You are free to add it in “RISC-V configuration structure” but from Linux, Hypervisors and M-mode RUNTIME firmware perspective we don’t’ need it.
All these software will:
Regards, Anup
From: tech-privileged@... <tech-privileged@...>
On Behalf Of Abner Chang
Sent: 25 May 2020 11:52 To: Anup Patel <Anup.Patel@...>; Andrew Waterman <andrew@...>; Tariq Kurd <tariq.kurd@...> Cc: tech-privileged@... Subject: Re: [RISC-V] [tech-privileged] Extending the number of PMP entries
Missed this mail while I was replying to Andrew. Same feedback to your comment in that reply.
From:
tech-privileged@... [mailto:tech-privileged@...]
On Behalf Of Anup Patel
This is not needed. We can easily probe number of PMP registers using illegal instruction traps. Look at latest OpenSBI sources.
Regards, Anup
From:
tech-privileged@... <tech-privileged@...>
On Behalf Of Abner Chang
Just writing to confirm that there is no information regards to the # of PMP entries supported by hart mentioned in privilege spec . If my understanding is correct, then this information is good to go to RISC-V configurations structure.
From:
tech-privileged@... [mailto:tech-privileged@...]
On Behalf Of Andrew Waterman
I've made a pull request to extend the number of PMP entries, and have attached the compiled PDF for convenience. Feedback and error detection are appreciated: the fact that there used to be 16 PMP entries manifested in several places in the document.
On Fri, May 22, 2020 at 12:30 AM Tariq Kurd <tariq.kurd@...> wrote:
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