From: Palmer Dabbelt Date: Wed, 19 Apr 2023 03:43:07 +0000 (-0700) Subject: Merge patch series "riscv: Use PUD/P4D/PGD pages for the linear mapping" X-Git-Tag: v6.4-rc1~88^2~7 X-Git-Url: http://git.sourceforge.jp/view?a=commitdiff_plain;h=2e75ab3189ecfe5f4383ef82896d30eaad0b3cd6;p=tomoyo%2Ftomoyo-test1.git Merge patch series "riscv: Use PUD/P4D/PGD pages for the linear mapping" Alexandre Ghiti says: This patchset intends to improve tlb utilization by using hugepages for the linear mapping. As reported by Anup in v6, when STRICT_KERNEL_RWX is enabled, we must take care of isolating the kernel text and rodata so that they are not mapped with a PUD mapping which would then assign wrong permissions to the whole region: it is achieved the same way as arm64 by using the memblock nomap API which isolates those regions and re-merge them afterwards thus avoiding any issue with the system resources tree creation. arch/riscv/include/asm/page.h | 19 ++++++- arch/riscv/mm/init.c | 102 ++++++++++++++++++++++++++-------- arch/riscv/mm/physaddr.c | 16 ++++++ drivers/of/fdt.c | 11 ++-- 4 files changed, 118 insertions(+), 30 deletions(-) * b4-shazam-merge: riscv: Use PUD/P4D/PGD pages for the linear mapping riscv: Move the linear mapping creation in its own function riscv: Get rid of riscv_pfn_base variable Link: https://lore.kernel.org/r/20230324155421.271544-1-alexghiti@rivosinc.com Signed-off-by: Palmer Dabbelt --- 2e75ab3189ecfe5f4383ef82896d30eaad0b3cd6