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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
| commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
| tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/powerpc/include/asm/sections.h | |
| parent | Initial commit. (diff) | |
| download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip | |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/powerpc/include/asm/sections.h')
| -rw-r--r-- | arch/powerpc/include/asm/sections.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/sections.h b/arch/powerpc/include/asm/sections.h new file mode 100644 index 0000000000..ea26665f82 --- /dev/null +++ b/arch/powerpc/include/asm/sections.h @@ -0,0 +1,82 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_POWERPC_SECTIONS_H +#define _ASM_POWERPC_SECTIONS_H +#ifdef __KERNEL__ + +#include <linux/elf.h> +#include <linux/uaccess.h> + +#ifdef CONFIG_HAVE_FUNCTION_DESCRIPTORS +typedef struct func_desc func_desc_t; +#endif + +#include <asm-generic/sections.h> + +extern char __head_end[]; +extern char __srwx_boundary[]; + +/* Patch sites */ +extern s32 patch__call_flush_branch_caches1; +extern s32 patch__call_flush_branch_caches2; +extern s32 patch__call_flush_branch_caches3; +extern s32 patch__flush_count_cache_return; +extern s32 patch__flush_link_stack_return; +extern s32 patch__call_kvm_flush_link_stack; +extern s32 patch__call_kvm_flush_link_stack_p9; +extern s32 patch__memset_nocache, patch__memcpy_nocache; + +extern long flush_branch_caches; +extern long kvm_flush_link_stack; + +#ifdef __powerpc64__ + +extern char __start_interrupts[]; +extern char __end_interrupts[]; + +#ifdef CONFIG_PPC_POWERNV +extern char start_real_trampolines[]; +extern char end_real_trampolines[]; +extern char start_virt_trampolines[]; +extern char end_virt_trampolines[]; +#endif + +/* + * This assumes the kernel is never compiled -mcmodel=small or + * the total .toc is always less than 64k. + */ +static inline unsigned long kernel_toc_addr(void) +{ +#ifdef CONFIG_PPC_KERNEL_PCREL + BUILD_BUG(); + return -1UL; +#else + unsigned long toc_ptr; + + asm volatile("mr %0, 2" : "=r" (toc_ptr)); + return toc_ptr; +#endif +} + +static inline int overlaps_interrupt_vector_text(unsigned long start, + unsigned long end) +{ + unsigned long real_start, real_end; + real_start = __start_interrupts - _stext; + real_end = __end_interrupts - _stext; + + return start < (unsigned long)__va(real_end) && + (unsigned long)__va(real_start) < end; +} + +static inline int overlaps_kernel_text(unsigned long start, unsigned long end) +{ + return start < (unsigned long)__init_end && + (unsigned long)_stext < end; +} + +#else +static inline unsigned long kernel_toc_addr(void) { BUILD_BUG(); return -1UL; } +#endif + +#endif /* __KERNEL__ */ +#endif /* _ASM_POWERPC_SECTIONS_H */ |