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0ca84aea |
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10-Apr-2024 |
Huacai Chen <chenhuacai@kernel.org> |
LoongArch: Make {virt, phys, page, pfn} translation work with KFENCE KFENCE changes virt_to_page() to be able to translate tlb mapped virtual addresses, but forget to change virt_to_phys()/phys_to_virt() and other translation functions as well. This patch fix it, otherwise some drivers (such as nvme and virtio-blk) cannot work with KFENCE. All {virt, phys, page, pfn} translation functions are updated: 1, virt_to_pfn()/pfn_to_virt(); 2, virt_to_page()/page_to_virt(); 3, virt_to_phys()/phys_to_virt(). DMW/TLB mapped addresses are distinguished by comparing the vaddress with vm_map_base in virt_to_xyz(), and we define WANT_PAGE_VIRTUAL in the KFENCE case for the reverse translations, xyz_to_virt(). Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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6ad3df56 |
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06-Sep-2023 |
Enze Li <lienze@kylinos.cn> |
LoongArch: Add KFENCE (Kernel Electric-Fence) support The LoongArch architecture is quite different from other architectures. When the allocating of KFENCE itself is done, it is mapped to the direct mapping configuration window [1] by default on LoongArch. It means that it is not possible to use the page table mapped mode which required by the KFENCE system and therefore it should be remapped to the appropriate region. This patch adds architecture specific implementation details for KFENCE. In particular, this implements the required interface in <asm/kfence.h>. Tested this patch by running the testcases and all passed. [1] https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html#virtual-address-space-and-address-translation-mode Signed-off-by: Enze Li <lienze@kylinos.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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