[PATCH RESEND v10 0/3] riscv, mm: detect svnapot cpu support at runtime

[Qinglin Pan]

On 2022/12/12 16:07, Andrew Jones wrote:
> Hi Qinglin,
> 
> This is actually v11, not a v10 resend. And please don't send new versions
> minutes after sending previous versions. v10 is still under review and
> discussion.
> 
> Thanks,
> drew

Hi Andrew,

Thanks for the notification. I will send v11 after a few days.

Thanks,
Qinglin.

> 
> On Mon, Dec 12, 2022 at 03:52:20PM +0800, panqinglin2020 at iscas.ac.cn wrote:
>> From: Qinglin Pan <panqinglin2020 at iscas.ac.cn>
>>
>> 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
>>
>>
>> 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/errata_list.h |  15 +-
>>   arch/riscv/include/asm/hugetlb.h     |  34 ++-
>>   arch/riscv/include/asm/hwcap.h       |   2 +-
>>   arch/riscv/include/asm/page.h        |   5 -
>>   arch/riscv/include/asm/pgtable-64.h  |  34 +++
>>   arch/riscv/include/asm/pgtable.h     |  43 +++-
>>   arch/riscv/include/asm/vmalloc.h     |  61 +++++-
>>   arch/riscv/kernel/cpu.c              |   1 +
>>   arch/riscv/kernel/cpufeature.c       |  15 ++
>>   arch/riscv/mm/hugetlbpage.c          | 301 +++++++++++++++++++++++++++
>>   11 files changed, 519 insertions(+), 13 deletions(-)
>>
>> -- 
>> 2.37.4
>>