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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2015-2018 - ARM Ltd
* Author: Marc Zyngier <marc.zyngier@arm.com>
*/
#include <linux/arm-smccc.h>
#include <linux/linkage.h>
#include <asm/kvm_asm.h>
#include <asm/kvm_mmu.h>
/*
* This is not executed directly and is instead copied into the vectors
* by install_bp_hardening_cb().
*/
.data
.pushsection .rodata
.global __smccc_workaround_1_smc
SYM_DATA_START(__smccc_workaround_1_smc)
esb
sub sp, sp, #(8 * 4)
stp x2, x3, [sp, #(8 * 0)]
stp x0, x1, [sp, #(8 * 2)]
mov w0, #ARM_SMCCC_ARCH_WORKAROUND_1
smc #0
ldp x2, x3, [sp, #(8 * 0)]
ldp x0, x1, [sp, #(8 * 2)]
add sp, sp, #(8 * 4)
1: .org __smccc_workaround_1_smc + __SMCCC_WORKAROUND_1_SMC_SZ
.org 1b
SYM_DATA_END(__smccc_workaround_1_smc)
.global __smccc_workaround_3_smc
SYM_DATA_START(__smccc_workaround_3_smc)
esb
sub sp, sp, #(8 * 4)
stp x2, x3, [sp, #(8 * 0)]
stp x0, x1, [sp, #(8 * 2)]
mov w0, #ARM_SMCCC_ARCH_WORKAROUND_3
smc #0
ldp x2, x3, [sp, #(8 * 0)]
ldp x0, x1, [sp, #(8 * 2)]
add sp, sp, #(8 * 4)
1: .org __smccc_workaround_3_smc + __SMCCC_WORKAROUND_3_SMC_SZ
.org 1b
SYM_DATA_END(__smccc_workaround_3_smc)
.global __spectre_bhb_loop_k8
SYM_DATA_START(__spectre_bhb_loop_k8)
esb
sub sp, sp, #(8 * 2)
stp x0, x1, [sp, #(8 * 0)]
mov x0, #8
2: b . + 4
subs x0, x0, #1
b.ne 2b
dsb nsh
isb
ldp x0, x1, [sp, #(8 * 0)]
add sp, sp, #(8 * 2)
1: .org __spectre_bhb_loop_k8 + __SPECTRE_BHB_LOOP_SZ
.org 1b
SYM_DATA_END(__spectre_bhb_loop_k8)
.global __spectre_bhb_loop_k24
SYM_DATA_START(__spectre_bhb_loop_k24)
esb
sub sp, sp, #(8 * 2)
stp x0, x1, [sp, #(8 * 0)]
mov x0, #8
2: b . + 4
subs x0, x0, #1
b.ne 2b
dsb nsh
isb
ldp x0, x1, [sp, #(8 * 0)]
add sp, sp, #(8 * 2)
1: .org __spectre_bhb_loop_k24 + __SPECTRE_BHB_LOOP_SZ
.org 1b
SYM_DATA_END(__spectre_bhb_loop_k24)
.global __spectre_bhb_loop_k32
SYM_DATA_START(__spectre_bhb_loop_k32)
esb
sub sp, sp, #(8 * 2)
stp x0, x1, [sp, #(8 * 0)]
mov x0, #8
2: b . + 4
subs x0, x0, #1
b.ne 2b
dsb nsh
isb
ldp x0, x1, [sp, #(8 * 0)]
add sp, sp, #(8 * 2)
1: .org __spectre_bhb_loop_k32 + __SPECTRE_BHB_LOOP_SZ
.org 1b
SYM_DATA_END(__spectre_bhb_loop_k32)
.global __spectre_bhb_clearbhb
SYM_DATA_START(__spectre_bhb_clearbhb)
esb
clearbhb
isb
1: .org __spectre_bhb_clearbhb + __SPECTRE_BHB_CLEARBHB_SZ
.org 1b
SYM_DATA_END(__spectre_bhb_clearbhb)
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