Re: [PATCH v2 0/6] RISC-V: Enable cbo.zero in usermode

[Andrew Jones <ajones@ventanamicro.com>]

On Wed, Aug 30, 2023 at 06:49:55PM +0200, Andrew Jones wrote:
> In order for usermode to issue cbo.zero, it needs privilege granted to
> issue the extension instruction (patch 2) and to know that the extension
> is available and its block size (patch 3). Patch 1 could be separate from
> this series (it just fixes up some error messages), patches 4-5 convert
> the hwprobe selftest to a statically-linked, TAP test and patch 6 adds a
> new hwprobe test for the new information as well as testing CBO
> instructions can or cannot be issued as appropriate.
> 
> Thanks,
> drew
> 
> v2:
>   - fixed build of the vector selftest

for-next also needs commit 25696067202f ("selftests: riscv: Fix
compilation error with vstate_exec_nolibc.c") in order for the vector
selftest to build.

Thanks,
drew

>   - changed this-cpu wrappers to just cpu wrappers and then pass
>     smp_processor_id() at the callsite
>   - added comment to EXT_KEY macro
>   - picked up a couple r-b's
> 
> Andrew Jones (6):
>   RISC-V: Make zicbom/zicboz errors consistent
>   RISC-V: Enable cbo.zero in usermode
>   RISC-V: hwprobe: Expose Zicboz extension and its block size
>   RISC-V: selftests: Statically link hwprobe test
>   RISC-V: selftests: Convert hwprobe test to kselftest API
>   RISC-V: selftests: Add CBO tests
> 
>  Documentation/riscv/hwprobe.rst               |   6 +
>  arch/riscv/include/asm/cpufeature.h           |   2 +
>  arch/riscv/include/asm/csr.h                  |   1 +
>  arch/riscv/include/asm/hwcap.h                |  16 ++
>  arch/riscv/include/asm/hwprobe.h              |   2 +-
>  arch/riscv/include/uapi/asm/hwprobe.h         |   2 +
>  arch/riscv/kernel/cpufeature.c                |  10 +-
>  arch/riscv/kernel/setup.c                     |   4 +
>  arch/riscv/kernel/smpboot.c                   |   4 +
>  arch/riscv/kernel/sys_riscv.c                 |  46 +++--
>  .../testing/selftests/riscv/hwprobe/Makefile  |   9 +-
>  tools/testing/selftests/riscv/hwprobe/cbo.c   | 162 ++++++++++++++++++
>  .../testing/selftests/riscv/hwprobe/hwprobe.c |  64 +++----
>  .../testing/selftests/riscv/hwprobe/hwprobe.h |  15 ++
>  14 files changed, 280 insertions(+), 63 deletions(-)
>  create mode 100644 tools/testing/selftests/riscv/hwprobe/cbo.c
>  create mode 100644 tools/testing/selftests/riscv/hwprobe/hwprobe.h
> 
> -- 
> 2.41.0
> 

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