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Diffstat (limited to 'arch/arm64/kernel/bpi.S')
| -rw-r--r-- | arch/arm64/kernel/bpi.S | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/arch/arm64/kernel/bpi.S b/arch/arm64/kernel/bpi.S deleted file mode 100644 index bb0b67722e86..000000000000 --- a/arch/arm64/kernel/bpi.S +++ /dev/null @@ -1,102 +0,0 @@ -/* - * Contains CPU specific branch predictor invalidation sequences - * - * Copyright (C) 2018 ARM Ltd. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#include <linux/linkage.h> -#include <linux/arm-smccc.h> - -#include <asm/alternative.h> -#include <asm/mmu.h> - -.macro hyp_ventry - .align 7 -1: .rept 27 - nop - .endr -/* - * The default sequence is to directly branch to the KVM vectors, - * using the computed offset. This applies for VHE as well as - * !ARM64_HARDEN_EL2_VECTORS. - * - * For ARM64_HARDEN_EL2_VECTORS configurations, this gets replaced - * with: - * - * stp x0, x1, [sp, #-16]! - * movz x0, #(addr & 0xffff) - * movk x0, #((addr >> 16) & 0xffff), lsl #16 - * movk x0, #((addr >> 32) & 0xffff), lsl #32 - * br x0 - * - * Where addr = kern_hyp_va(__kvm_hyp_vector) + vector-offset + 4. - * See kvm_patch_vector_branch for details. - */ -alternative_cb kvm_patch_vector_branch - b __kvm_hyp_vector + (1b - 0b) - nop - nop - nop - nop -alternative_cb_end -.endm - -.macro generate_vectors -0: - .rept 16 - hyp_ventry - .endr - .org 0b + SZ_2K // Safety measure -.endm - - - .text - .pushsection .hyp.text, "ax" - - .align 11 -ENTRY(__bp_harden_hyp_vecs_start) - .rept BP_HARDEN_EL2_SLOTS - generate_vectors - .endr -ENTRY(__bp_harden_hyp_vecs_end) - - .popsection - -ENTRY(__qcom_hyp_sanitize_link_stack_start) - stp x29, x30, [sp, #-16]! - .rept 16 - bl . + 4 - .endr - ldp x29, x30, [sp], #16 -ENTRY(__qcom_hyp_sanitize_link_stack_end) - -.macro smccc_workaround_1 inst - sub sp, sp, #(8 * 4) - stp x2, x3, [sp, #(8 * 0)] - stp x0, x1, [sp, #(8 * 2)] - mov w0, #ARM_SMCCC_ARCH_WORKAROUND_1 - \inst #0 - ldp x2, x3, [sp, #(8 * 0)] - ldp x0, x1, [sp, #(8 * 2)] - add sp, sp, #(8 * 4) -.endm - -ENTRY(__smccc_workaround_1_smc_start) - smccc_workaround_1 smc -ENTRY(__smccc_workaround_1_smc_end) - -ENTRY(__smccc_workaround_1_hvc_start) - smccc_workaround_1 hvc -ENTRY(__smccc_workaround_1_hvc_end) |