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Re: [PATCH v3 21/21] target/riscv: support for 128-bit satp

From: Richard Henderson
Subject: Re: [PATCH v3 21/21] target/riscv: support for 128-bit satp
Date: Wed, 20 Oct 2021 16:09:59 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0

On 10/19/21 2:48 AM, Frédéric Pétrot wrote:
Support for a 128-bit satp. This is a bit more involved than necessary
because we took the opportunity to increase the page size to 16kB, and
change the page table geometry, which makes the page walk a bit more
parametrizable (variables instead of defines).
Note that is anyway a necessary step for the merging of the 32-bit and
64-bit riscv versions in a single executable.

Signed-off-by: Frédéric Pétrot<frederic.petrot@univ-grenoble-alpes.fr>
Co-authored-by: Fabien Portas<fabien.portas@grenoble-inp.org>
  target/riscv/cpu-param.h  |   9 +++-
  target/riscv/cpu_bits.h   |  10 ++++
  target/riscv/cpu_helper.c |  54 ++++++++++++++------
  target/riscv/csr.c        | 105 ++++++++++++++++++++++++++++++++------
  4 files changed, 144 insertions(+), 34 deletions(-)

Is there a spec for this?  I don't see anything in the 2021-10-06 draft...


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