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| author | Pasha <pasha@member.fsf.org> | 2024-02-20 18:55:36 +0000 |
|---|---|---|
| committer | Pasha <pasha@member.fsf.org> | 2024-02-20 18:55:36 +0000 |
| commit | 6fca8abef7e6d7be1a9e6d93dd0f2b7fbc5b28e5 (patch) | |
| tree | 9f5ccbaa6ec19ff5a42d9b3cde01f739e1d7c77d /riscv/include/asm/kfence.h | |
| parent | 5e0b8d508ed51004bd836384293be00950ee62c9 (diff) | |
| download | gnumach-riscv-6fca8abef7e6d7be1a9e6d93dd0f2b7fbc5b28e5.tar.gz gnumach-riscv-6fca8abef7e6d7be1a9e6d93dd0f2b7fbc5b28e5.tar.bz2 | |
Diffstat (limited to 'riscv/include/asm/kfence.h')
| -rw-r--r-- | riscv/include/asm/kfence.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/riscv/include/asm/kfence.h b/riscv/include/asm/kfence.h new file mode 100644 index 0000000..0bbffd5 --- /dev/null +++ b/riscv/include/asm/kfence.h @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef _ASM_RISCV_KFENCE_H +#define _ASM_RISCV_KFENCE_H + +#include <linux/kfence.h> +#include <linux/pfn.h> +#include <asm-generic/pgalloc.h> +#include <asm/pgtable.h> + +static inline bool arch_kfence_init_pool(void) +{ + return true; +} + +static inline bool kfence_protect_page(unsigned long addr, bool protect) +{ + pte_t *pte = virt_to_kpte(addr); + + if (protect) + set_pte(pte, __pte(pte_val(*pte) & ~_PAGE_PRESENT)); + else + set_pte(pte, __pte(pte_val(*pte) | _PAGE_PRESENT)); + + flush_tlb_kernel_range(addr, addr + PAGE_SIZE); + + return true; +} + +#endif /* _ASM_RISCV_KFENCE_H */ |