| From: |
| Huacai Chen <chenhuacai-AT-loongson.cn> |
| To: |
| Andrew Morton <akpm-AT-linux-foundation.org>, Huacai Chen <chenhuacai-AT-kernel.org> |
| Subject: |
| [PATCH 0/3] Make {virt, phys, page, pfn} translation work with KFENCE for LoongArch |
| Date: |
| Thu, 04 Apr 2024 21:36:33 +0800 |
| Message-ID: |
| <20240404133642.971583-1-chenhuacai@loongson.cn> |
| Cc: |
| loongarch-AT-lists.linux.dev, linux-mm-AT-kvack.org, Xuefeng Li <lixuefeng-AT-loongson.cn>, Guo Ren <guoren-AT-kernel.org>, Xuerui Wang <kernel-AT-xen0n.name>, Jiaxun Yang <jiaxun.yang-AT-flygoat.com>, linux-kernel-AT-vger.kernel.org, loongson-kernel-AT-lists.loongnix.cn, Huacai Chen <chenhuacai-AT-loongson.cn> |
| Archive-link: |
| Article |
On LoongArch kmalloc() range is DMW-mapped rather than TLB-mapped, so
KFENCE remap __kfence_pool to the TLB-mappd range.
To make all drivers work, {virt, phys, page, pfn} translation functions
are overriden (part of them already done, others done in this series):
1, virt_to_pfn()/pfn_to_virt();
2, virt_to_page()/page_to_virt();
3, virt_to_phys()/phys_to_virt().
Since LoongArch overrides page_to_virt() which use page_address() in the
KFENCE case (by defining WANT_PAGE_VIRTUAL/HASHED_PAGE_VIRTUAL). So move
lowmem_page_address() a little later to avoid such build errors:
error: implicit declaration of function ‘page_address’.
Huacai Chen(3):
mm: Move lowmem_page_address() a little later.
LoongArch: Make {virt, phys, page, pfn} translation work with KFENCE
LoongArch: Make virt_addr_valid()/__virt_addr_valid() work with KFENCE
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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2.27.0
