mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-11 04:54:13 +08:00
29e8910a56
Owing to the fact that the host kernel is always mitigated, we can drastically simplify the WA2 handling by keeping the mitigation state ON when entering the guest. This means the guest is either unaffected or not mitigated. This results in a nice simplification of the mitigation space, and the removal of a lot of code that was never really used anyway. Signed-off-by: Marc Zyngier <maz@kernel.org> Signed-off-by: Will Deacon <will@kernel.org>
111 lines
3.3 KiB
C
111 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Linker script variables to be set after section resolution, as
|
|
* ld.lld does not like variables assigned before SECTIONS is processed.
|
|
*/
|
|
#ifndef __ARM64_KERNEL_IMAGE_VARS_H
|
|
#define __ARM64_KERNEL_IMAGE_VARS_H
|
|
|
|
#ifndef LINKER_SCRIPT
|
|
#error This file should only be included in vmlinux.lds.S
|
|
#endif
|
|
|
|
#ifdef CONFIG_EFI
|
|
|
|
__efistub_kernel_size = _edata - _text;
|
|
__efistub_primary_entry_offset = primary_entry - _text;
|
|
|
|
|
|
/*
|
|
* The EFI stub has its own symbol namespace prefixed by __efistub_, to
|
|
* isolate it from the kernel proper. The following symbols are legally
|
|
* accessed by the stub, so provide some aliases to make them accessible.
|
|
* Only include data symbols here, or text symbols of functions that are
|
|
* guaranteed to be safe when executed at another offset than they were
|
|
* linked at. The routines below are all implemented in assembler in a
|
|
* position independent manner
|
|
*/
|
|
__efistub_memcmp = __pi_memcmp;
|
|
__efistub_memchr = __pi_memchr;
|
|
__efistub_memcpy = __pi_memcpy;
|
|
__efistub_memmove = __pi_memmove;
|
|
__efistub_memset = __pi_memset;
|
|
__efistub_strlen = __pi_strlen;
|
|
__efistub_strnlen = __pi_strnlen;
|
|
__efistub_strcmp = __pi_strcmp;
|
|
__efistub_strncmp = __pi_strncmp;
|
|
__efistub_strrchr = __pi_strrchr;
|
|
__efistub___clean_dcache_area_poc = __pi___clean_dcache_area_poc;
|
|
|
|
#ifdef CONFIG_KASAN
|
|
__efistub___memcpy = __pi_memcpy;
|
|
__efistub___memmove = __pi_memmove;
|
|
__efistub___memset = __pi_memset;
|
|
#endif
|
|
|
|
__efistub__text = _text;
|
|
__efistub__end = _end;
|
|
__efistub__edata = _edata;
|
|
__efistub_screen_info = screen_info;
|
|
__efistub__ctype = _ctype;
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_KVM
|
|
|
|
/*
|
|
* KVM nVHE code has its own symbol namespace prefixed with __kvm_nvhe_, to
|
|
* separate it from the kernel proper. The following symbols are legally
|
|
* accessed by it, therefore provide aliases to make them linkable.
|
|
* Do not include symbols which may not be safely accessed under hypervisor
|
|
* memory mappings.
|
|
*/
|
|
|
|
#define KVM_NVHE_ALIAS(sym) __kvm_nvhe_##sym = sym;
|
|
|
|
/* Alternative callbacks for init-time patching of nVHE hyp code. */
|
|
KVM_NVHE_ALIAS(kvm_patch_vector_branch);
|
|
KVM_NVHE_ALIAS(kvm_update_va_mask);
|
|
|
|
/* Global kernel state accessed by nVHE hyp code. */
|
|
KVM_NVHE_ALIAS(kvm_host_data);
|
|
KVM_NVHE_ALIAS(kvm_vgic_global_state);
|
|
|
|
/* Kernel constant needed to compute idmap addresses. */
|
|
KVM_NVHE_ALIAS(kimage_voffset);
|
|
|
|
/* Kernel symbols used to call panic() from nVHE hyp code (via ERET). */
|
|
KVM_NVHE_ALIAS(__hyp_panic_string);
|
|
KVM_NVHE_ALIAS(panic);
|
|
|
|
/* Vectors installed by hyp-init on reset HVC. */
|
|
KVM_NVHE_ALIAS(__hyp_stub_vectors);
|
|
|
|
/* IDMAP TCR_EL1.T0SZ as computed by the EL1 init code */
|
|
KVM_NVHE_ALIAS(idmap_t0sz);
|
|
|
|
/* Kernel symbol used by icache_is_vpipt(). */
|
|
KVM_NVHE_ALIAS(__icache_flags);
|
|
|
|
/* Kernel symbols needed for cpus_have_final/const_caps checks. */
|
|
KVM_NVHE_ALIAS(arm64_const_caps_ready);
|
|
KVM_NVHE_ALIAS(cpu_hwcap_keys);
|
|
KVM_NVHE_ALIAS(cpu_hwcaps);
|
|
|
|
/* Static keys which are set if a vGIC trap should be handled in hyp. */
|
|
KVM_NVHE_ALIAS(vgic_v2_cpuif_trap);
|
|
KVM_NVHE_ALIAS(vgic_v3_cpuif_trap);
|
|
|
|
/* Static key checked in pmr_sync(). */
|
|
#ifdef CONFIG_ARM64_PSEUDO_NMI
|
|
KVM_NVHE_ALIAS(gic_pmr_sync);
|
|
#endif
|
|
|
|
/* EL2 exception handling */
|
|
KVM_NVHE_ALIAS(__start___kvm_ex_table);
|
|
KVM_NVHE_ALIAS(__stop___kvm_ex_table);
|
|
|
|
#endif /* CONFIG_KVM */
|
|
|
|
#endif /* __ARM64_KERNEL_IMAGE_VARS_H */
|