[PATCH v12 0/3] riscv, mm: detect svnapot cpu support at runtime

[Qinglin Pan]

Hey!

On 2023/2/9 15:30, Conor Dooley wrote:
> Hey!
> 
> On Thu, Feb 09, 2023 at 12:00:32PM +0800, Qinglin Pan wrote:
>> Hi all,
>>
>> Sorry for bothering :(
>>
>> This patchset has a bit of a formatting problem.
>> Please use another one:
>> https://lore.kernel.org/linux-riscv/20230209035343.15282-1-panqinglin00@gmail.com/T/#t
> 
> If you're resending, please either mark as RESEND or increment the
> version number so that tools don't get confused.
> In this case though, tools found some issues with both version
> unfortunately:
> https://patchwork.kernel.org/project/linux-riscv/patch/20230209035343.15282-2-panqinglin00@gmail.com/
> https://patchwork.kernel.org/project/linux-riscv/patch/20230209035343.15282-3-panqinglin00@gmail.com/
> (if you click on the descriptions you should get more information on
> what is wrong)
> 
> You can fix those up and send a v13 and it'll all be clear then ;)

Your information is very helpful, thanks so much!

I will send a v13 later. But I am very curious about why
conchuod/alphanumeric_selects is failed and what content is in
this test? Could you please give me some hints about it? ;)

Regards,
Qinglin.

> 
> Cheers,
> Conor.
> 
>>
>> Thanks,
>> Qinglin
>>
>> On 2023/2/9 11:13, Qinglin Pan wrote:
>>>
>>> Svnapot is a RISC-V extension for marking contiguous 4K pages as a non-4K
>>> page. This patch set is for using Svnapot in hugetlb fs and huge vmap.
>>>
>>> This patchset adds a Kconfig item for using Svnapot in
>>> "Platform type"->"SVNAPOT extension support". Its default value is on,
>>> and people can set it off if they don't allow kernel to detect Svnapot
>>> hardware support and leverage it.
>>>
>>> Tested on:
>>>     - qemu rv64 with "Svnapot support" off and svnapot=true.
>>>     - qemu rv64 with "Svnapot support" on and svnapot=true.
>>>     - qemu rv64 with "Svnapot support" off and svnapot=false.
>>>     - qemu rv64 with "Svnapot support" on and svnapot=false.
>>>
>>>
>>> Changes in v2:
>>>     - detect Svnapot hardware support at boot time.
>>> Changes in v3:
>>>     - do linear mapping again if has_svnapot
>>> Changes in v4:
>>>     - fix some errors/warns reported by checkpatch.pl, thanks @Conor
>>> Changes in v5:
>>>     - modify code according to @Conor and @Heiko
>>> Changes in v6:
>>>     - use static key insead of alternative errata
>>> Changes in v7:
>>>     - add napot_cont_order for possible more napot order in the future
>>>     - remove linear mapping related code from this patchset to another patch
>>>     - refactor hugetlb code for svnapot according to thanks @Andrew @Conor
>>>     - use tools/testing/selftests/vm/map_hugetlb as hugetlb testing program
>>>     - support svnapot in huge vmap on newer for-next branch
>>> Changes in v8:
>>>     - fix compilation errors in rv32_defconfig
>>>     - insert some lines of whitespace according to @Conor's suggestion
>>> Changes in v9:
>>>     - use alternative to avoid using static branches inside heavily used
>>>       inline functions
>>>     - change napot_cont_mask definition
>>>     - post test_vmalloc modification about testing vmalloc_huge
>>> Changes in v10:
>>>     - fix some nits caught by @Andrew
>>>     - collect Reviewed-by/Acked-by
>>>     - add memory leak warning in KConfig text
>>>     - replace test_vmalloc patch link with the standard one
>>> Changes in v11:
>>>     - add more detailed warning about HUGETLBFS and SVNAPOT in KConfig text
>>>     - fix missing reverse-xmas tree
>>> Changes in v12:
>>>     - rebase on the new ISA extension API [1]
>>>
>>> [1]https://lore.kernel.org/all/20230128172856.3814-5-jszhang@kernel.org/
>>>
>>> Qinglin Pan (3):
>>>     riscv: mm: modify pte format for Svnapot
>>>     riscv: mm: support Svnapot in hugetlb page
>>>     riscv: mm: support Svnapot in huge vmap
>>>
>>>    arch/riscv/Kconfig                  |  21 +-
>>>    arch/riscv/include/asm/hugetlb.h    |  34 +++-
>>>    arch/riscv/include/asm/hwcap.h      |   9 +-
>>>    arch/riscv/include/asm/page.h       |   5 -
>>>    arch/riscv/include/asm/pgtable-64.h |  34 ++++
>>>    arch/riscv/include/asm/pgtable.h    |  39 +++-
>>>    arch/riscv/include/asm/vmalloc.h    |  61 +++++-
>>>    arch/riscv/kernel/cpu.c             |   1 +
>>>    arch/riscv/kernel/cpufeature.c      |   1 +
>>>    arch/riscv/mm/hugetlbpage.c         | 301 ++++++++++++++++++++++++++++
>>>    10 files changed, 493 insertions(+), 13 deletions(-)
>>>
>>
>>
>> _______________________________________________
>> linux-riscv mailing list
>> linux-riscv at lists.infradead.org
>> http://lists.infradead.org/mailman/listinfo/linux-riscv