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| author | Palmer Dabbelt <palmer@rivosinc.com> | 2023-09-08 21:25:13 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-09-08 21:25:13 +0300 |
| commit | f57805555834494e8cad729d01d86ba326d64959 (patch) | |
| tree | be3a984a98b86c4e62edf8224f18e2618578401c /arch/arm64 | |
| parent | f0936363547948e0c2b757aff52f6ee29396651d (diff) | |
| parent | b7ac4b8ee73d4fec0998664c9dd61f089d481044 (diff) | |
| download | linux-f57805555834494e8cad729d01d86ba326d64959.tar.xz | |
Merge patch series "riscv: Introduce KASLR"
Alexandre Ghiti <alexghiti@rivosinc.com> says:
The following KASLR implementation allows to randomize the kernel mapping:
- virtually: we expect the bootloader to provide a seed in the device-tree
- physically: only implemented in the EFI stub, it relies on the firmware to
provide a seed using EFI_RNG_PROTOCOL. arm64 has a similar implementation
hence the patch 3 factorizes KASLR related functions for riscv to take
advantage.
The new virtual kernel location is limited by the early page table that only
has one PUD and with the PMD alignment constraint, the kernel can only take
< 512 positions.
* b4-shazam-merge:
riscv: libstub: Implement KASLR by using generic functions
libstub: Fix compilation warning for rv32
arm64: libstub: Move KASLR handling functions to kaslr.c
riscv: Dump out kernel offset information on panic
riscv: Introduce virtual kernel mapping KASLR
Link: https://lore.kernel.org/r/20230722123850.634544-1-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/include/asm/efi.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/efi.h b/arch/arm64/include/asm/efi.h index f482b994c608..bcd5622aa096 100644 --- a/arch/arm64/include/asm/efi.h +++ b/arch/arm64/include/asm/efi.h @@ -156,4 +156,6 @@ static inline void efi_capsule_flush_cache_range(void *addr, int size) efi_status_t efi_handle_corrupted_x18(efi_status_t s, const char *f); +void efi_icache_sync(unsigned long start, unsigned long end); + #endif /* _ASM_EFI_H */ |