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[v2,0/5] Introduce svukte ISA extension

Message ID 20241108085239.2927152-1-fea.wang@sifive.com (mailing list archive)
Headers show
Series Introduce svukte ISA extension | expand

Message

Fea.Wang Nov. 8, 2024, 8:52 a.m. UTC 
The Svukte ISA extension has been approved for fast-track development.
https://lf-riscv.atlassian.net/browse/RVS-2977 
And there are Linux patches for the Svukte that are under review.
https://lore.kernel.org/kvm/20240920-dev-maxh-svukte-rebase-v1-0-7864a88a62bd@sifive.com/T/#mf70fcb22cd2987ad268c0efee9b8583197d3cb4f

Svukte provides a means to make user-mode accesses to supervisor memory
raise page faults in constant time, mitigating attacks that attempt to
discover the supervisor software's address-space layout.

Refer to the draft of svukte extension from:
https://github.com/riscv/riscv-isa-manual/pull/1564

* Refactor the code

base-commit: 27652f9ca9d831c67dd447346c6ee953669255f0

[v1]
* Add svukte extension

Fea.Wang (5):
  target/riscv: Add svukte extension capability variable
  target/riscv: Support senvcfg[UKTE] bit when svukte extension is
    enabled
  target/riscv: Support hstatus[HUKTE] bit when svukte extension is
    enabled
  target/riscv: Check memory access to meet svuket rule
  target/riscv: Expose svukte ISA extension

 target/riscv/cpu.c        |  2 ++
 target/riscv/cpu_bits.h   |  2 ++
 target/riscv/cpu_cfg.h    |  1 +
 target/riscv/cpu_helper.c | 57 +++++++++++++++++++++++++++++++++++++++
 target/riscv/csr.c        |  7 +++++
 5 files changed, 69 insertions(+)