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945302df3d
Parse the device tree for Zkr in the isa string. If Zkr is present, use it to seed the kernel base address. On an ACPI system, as of this commit, there is no easy way to check if Zkr is present. Blindly running the instruction isn't an option as; we have to be able to trust the firmware. Signed-off-by: Jesse Taube <jesse@rivosinc.com> Reviewed-by: Charlie Jenkins <charlie@rivosinc.com> Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com> Tested-by: Zong Li <zong.li@sifive.com> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20240709173937.510084-5-jesse@rivosinc.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
20 lines
616 B
C
20 lines
616 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _RISCV_PI_H_
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#define _RISCV_PI_H_
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#include <linux/types.h>
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/*
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* The following functions are exported (but prefixed). Declare them here so
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* that LLVM does not complain it lacks the 'static' keyword (which, if
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* added, makes LLVM complain because the function is unused).
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*/
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u64 get_kaslr_seed(uintptr_t dtb_pa);
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u64 get_kaslr_seed_zkr(const uintptr_t dtb_pa);
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bool set_nokaslr_from_cmdline(uintptr_t dtb_pa);
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u64 set_satp_mode_from_cmdline(uintptr_t dtb_pa);
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bool fdt_early_match_extension_isa(const void *fdt, const char *ext_name);
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#endif /* _RISCV_PI_H_ */
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