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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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7b2399ea56
This snippet of assembly is used by cpu_errata.c to overwrite parts of KVM hyp vector. Move it to its own source file and change its ELF section to .rodata. Signed-off-by: David Brazdil <dbrazdil@google.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20200625131420.71444-3-dbrazdil@google.com
33 lines
783 B
ArmAsm
33 lines
783 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2015-2018 - ARM Ltd
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* Author: Marc Zyngier <marc.zyngier@arm.com>
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*/
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#include <linux/arm-smccc.h>
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#include <linux/linkage.h>
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#include <asm/kvm_asm.h>
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#include <asm/kvm_mmu.h>
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/*
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* This is not executed directly and is instead copied into the vectors
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* by install_bp_hardening_cb().
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*/
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.data
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.pushsection .rodata
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.global __smccc_workaround_1_smc
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SYM_DATA_START(__smccc_workaround_1_smc)
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esb
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sub sp, sp, #(8 * 4)
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stp x2, x3, [sp, #(8 * 0)]
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stp x0, x1, [sp, #(8 * 2)]
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mov w0, #ARM_SMCCC_ARCH_WORKAROUND_1
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smc #0
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ldp x2, x3, [sp, #(8 * 0)]
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ldp x0, x1, [sp, #(8 * 2)]
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add sp, sp, #(8 * 4)
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1: .org __smccc_workaround_1_smc + __SMCCC_WORKAROUND_1_SMC_SZ
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.org 1b
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SYM_DATA_END(__smccc_workaround_1_smc)
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