From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- arch/arm64/include/asm/asm_pointer_auth.h | 92 +++++++++++++++++++++++++++++++ 1 file changed, 92 insertions(+) create mode 100644 arch/arm64/include/asm/asm_pointer_auth.h (limited to 'arch/arm64/include/asm/asm_pointer_auth.h') diff --git a/arch/arm64/include/asm/asm_pointer_auth.h b/arch/arm64/include/asm/asm_pointer_auth.h new file mode 100644 index 0000000000..13ecc79854 --- /dev/null +++ b/arch/arm64/include/asm/asm_pointer_auth.h @@ -0,0 +1,92 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_ASM_POINTER_AUTH_H +#define __ASM_ASM_POINTER_AUTH_H + +#include +#include +#include +#include + +#ifdef CONFIG_ARM64_PTR_AUTH_KERNEL + + .macro __ptrauth_keys_install_kernel_nosync tsk, tmp1, tmp2, tmp3 + mov \tmp1, #THREAD_KEYS_KERNEL + add \tmp1, \tsk, \tmp1 + ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_KERNEL_KEY_APIA] + msr_s SYS_APIAKEYLO_EL1, \tmp2 + msr_s SYS_APIAKEYHI_EL1, \tmp3 + .endm + + .macro ptrauth_keys_install_kernel_nosync tsk, tmp1, tmp2, tmp3 +alternative_if ARM64_HAS_ADDRESS_AUTH + __ptrauth_keys_install_kernel_nosync \tsk, \tmp1, \tmp2, \tmp3 +alternative_else_nop_endif + .endm + + .macro ptrauth_keys_install_kernel tsk, tmp1, tmp2, tmp3 +alternative_if ARM64_HAS_ADDRESS_AUTH + __ptrauth_keys_install_kernel_nosync \tsk, \tmp1, \tmp2, \tmp3 + isb +alternative_else_nop_endif + .endm + +#else /* CONFIG_ARM64_PTR_AUTH_KERNEL */ + + .macro __ptrauth_keys_install_kernel_nosync tsk, tmp1, tmp2, tmp3 + .endm + + .macro ptrauth_keys_install_kernel_nosync tsk, tmp1, tmp2, tmp3 + .endm + + .macro ptrauth_keys_install_kernel tsk, tmp1, tmp2, tmp3 + .endm + +#endif /* CONFIG_ARM64_PTR_AUTH_KERNEL */ + +#ifdef CONFIG_ARM64_PTR_AUTH +/* + * thread.keys_user.ap* as offset exceeds the #imm offset range + * so use the base value of ldp as thread.keys_user and offset as + * thread.keys_user.ap*. + */ + .macro __ptrauth_keys_install_user tsk, tmp1, tmp2, tmp3 + mov \tmp1, #THREAD_KEYS_USER + add \tmp1, \tsk, \tmp1 + ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_USER_KEY_APIA] + msr_s SYS_APIAKEYLO_EL1, \tmp2 + msr_s SYS_APIAKEYHI_EL1, \tmp3 + .endm + + .macro __ptrauth_keys_init_cpu tsk, tmp1, tmp2, tmp3 + mrs \tmp1, id_aa64isar1_el1 + ubfx \tmp1, \tmp1, #ID_AA64ISAR1_EL1_APA_SHIFT, #8 + mrs_s \tmp2, SYS_ID_AA64ISAR2_EL1 + ubfx \tmp2, \tmp2, #ID_AA64ISAR2_EL1_APA3_SHIFT, #4 + orr \tmp1, \tmp1, \tmp2 + cbz \tmp1, .Lno_addr_auth\@ + mov_q \tmp1, (SCTLR_ELx_ENIA | SCTLR_ELx_ENIB | \ + SCTLR_ELx_ENDA | SCTLR_ELx_ENDB) + mrs \tmp2, sctlr_el1 + orr \tmp2, \tmp2, \tmp1 + msr sctlr_el1, \tmp2 + __ptrauth_keys_install_kernel_nosync \tsk, \tmp1, \tmp2, \tmp3 + isb +.Lno_addr_auth\@: + .endm + + .macro ptrauth_keys_init_cpu tsk, tmp1, tmp2, tmp3 +alternative_if_not ARM64_HAS_ADDRESS_AUTH + b .Lno_addr_auth\@ +alternative_else_nop_endif + __ptrauth_keys_init_cpu \tsk, \tmp1, \tmp2, \tmp3 +.Lno_addr_auth\@: + .endm + +#else /* !CONFIG_ARM64_PTR_AUTH */ + + .macro ptrauth_keys_install_user tsk, tmp1, tmp2, tmp3 + .endm + +#endif /* CONFIG_ARM64_PTR_AUTH */ + +#endif /* __ASM_ASM_POINTER_AUTH_H */ -- cgit v1.2.3