* [PATCH v8 0/3] riscv, mm: detect svnapot cpu support at runtime
@ 2022-11-28 2:26 panqinglin2020
0 siblings, 0 replies; 2+ messages in thread
From: panqinglin2020 @ 2022-11-28 2:26 UTC (permalink / raw)
To: palmer, linux-riscv; +Cc: jeff, xuyinan, conor, ajones, alex, Qinglin Pan
From: Qinglin Pan <panqinglin2020@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
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 | 16 +-
arch/riscv/include/asm/hugetlb.h | 34 +++-
arch/riscv/include/asm/hwcap.h | 4 +
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 | 294 ++++++++++++++++++++++++++++
10 files changed, 480 insertions(+), 9 deletions(-)
--
2.37.4
_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv
^ permalink raw reply [flat|nested] 2+ messages in thread
* [PATCH v8 0/3] riscv, mm: detect svnapot cpu support at runtime
@ 2022-11-28 2:27 panqinglin2020
0 siblings, 0 replies; 2+ messages in thread
From: panqinglin2020 @ 2022-11-28 2:27 UTC (permalink / raw)
To: palmer, linux-riscv; +Cc: jeff, xuyinan, conor, ajones, alex, Qinglin Pan
From: Qinglin Pan <panqinglin2020@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
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 | 16 +-
arch/riscv/include/asm/hugetlb.h | 34 +++-
arch/riscv/include/asm/hwcap.h | 4 +
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 | 294 ++++++++++++++++++++++++++++
10 files changed, 480 insertions(+), 9 deletions(-)
--
2.37.4
_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv
^ permalink raw reply [flat|nested] 2+ messages in thread
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