diff options
| author | David Brazdil <dbrazdil@google.com> | 2020-06-25 14:14:07 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-07-05 18:37:48 +0100 |
| commit | 7b2399ea5640b2e5f576af08b91091a26f240ea4 (patch) | |
| tree | c18e344fc0b220621b47085aaa3a60c653b10c4e /arch/arm64/kvm/hyp/smccc_wa.S | |
| parent | b38b298aa4397e2dc74a89b4dd3eac9e59b64c96 (diff) | |
KVM: arm64: Move __smccc_workaround_1_smc to .rodata
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
Diffstat (limited to 'arch/arm64/kvm/hyp/smccc_wa.S')
| -rw-r--r-- | arch/arm64/kvm/hyp/smccc_wa.S | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp/smccc_wa.S b/arch/arm64/kvm/hyp/smccc_wa.S new file mode 100644 index 000000000000..b0441dbdf68b --- /dev/null +++ b/arch/arm64/kvm/hyp/smccc_wa.S @@ -0,0 +1,32 @@ +/* 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) |