diff options
Diffstat (limited to 'arch/arm64/include')
| -rw-r--r-- | arch/arm64/include/asm/kexec.h | 5 | ||||
| -rw-r--r-- | arch/arm64/include/asm/mmu_context.h | 7 | ||||
| -rw-r--r-- | arch/arm64/include/asm/trans_pgd.h | 39 |
3 files changed, 45 insertions, 6 deletions
diff --git a/arch/arm64/include/asm/kexec.h b/arch/arm64/include/asm/kexec.h index d24b527e8c00..9befcd87e9a8 100644 --- a/arch/arm64/include/asm/kexec.h +++ b/arch/arm64/include/asm/kexec.h @@ -90,18 +90,19 @@ static inline void crash_prepare_suspend(void) {} static inline void crash_post_resume(void) {} #endif -#ifdef CONFIG_KEXEC_FILE #define ARCH_HAS_KIMAGE_ARCH struct kimage_arch { void *dtb; - unsigned long dtb_mem; + phys_addr_t dtb_mem; + phys_addr_t kern_reloc; /* Core ELF header buffer */ void *elf_headers; unsigned long elf_headers_mem; unsigned long elf_headers_sz; }; +#ifdef CONFIG_KEXEC_FILE extern const struct kexec_file_ops kexec_image_ops; struct kimage; diff --git a/arch/arm64/include/asm/mmu_context.h b/arch/arm64/include/asm/mmu_context.h index 0b3079fd28eb..70ce8c1d2b07 100644 --- a/arch/arm64/include/asm/mmu_context.h +++ b/arch/arm64/include/asm/mmu_context.h @@ -81,16 +81,15 @@ static inline bool __cpu_uses_extended_idmap_level(void) } /* - * Set TCR.T0SZ to its default value (based on VA_BITS) + * Ensure TCR.T0SZ is set to the provided value. */ static inline void __cpu_set_tcr_t0sz(unsigned long t0sz) { - unsigned long tcr; + unsigned long tcr = read_sysreg(tcr_el1); - if (!__cpu_uses_extended_idmap()) + if ((tcr & TCR_T0SZ_MASK) >> TCR_T0SZ_OFFSET == t0sz) return; - tcr = read_sysreg(tcr_el1); tcr &= ~TCR_T0SZ_MASK; tcr |= t0sz << TCR_T0SZ_OFFSET; write_sysreg(tcr, tcr_el1); diff --git a/arch/arm64/include/asm/trans_pgd.h b/arch/arm64/include/asm/trans_pgd.h new file mode 100644 index 000000000000..5d08e5adf3d5 --- /dev/null +++ b/arch/arm64/include/asm/trans_pgd.h @@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +/* + * Copyright (c) 2020, Microsoft Corporation. + * Pavel Tatashin <pasha.tatashin@soleen.com> + */ + +#ifndef _ASM_TRANS_TABLE_H +#define _ASM_TRANS_TABLE_H + +#include <linux/bits.h> +#include <linux/types.h> +#include <asm/pgtable-types.h> + +/* + * trans_alloc_page + * - Allocator that should return exactly one zeroed page, if this + * allocator fails, trans_pgd_create_copy() and trans_pgd_map_page() + * return -ENOMEM error. + * + * trans_alloc_arg + * - Passed to trans_alloc_page as an argument + */ + +struct trans_pgd_info { + void * (*trans_alloc_page)(void *arg); + void *trans_alloc_arg; +}; + +int trans_pgd_create_copy(struct trans_pgd_info *info, pgd_t **trans_pgd, + unsigned long start, unsigned long end); + +int trans_pgd_map_page(struct trans_pgd_info *info, pgd_t *trans_pgd, + void *page, unsigned long dst_addr, pgprot_t pgprot); + +int trans_pgd_idmap_page(struct trans_pgd_info *info, phys_addr_t *trans_ttbr0, + unsigned long *t0sz, void *page); + +#endif /* _ASM_TRANS_TABLE_H */ |