diff options
| author | Alexander Gordeev <agordeev@linux.ibm.com> | 2023-12-02 10:57:15 +0100 |
|---|---|---|
| committer | Alexander Gordeev <agordeev@linux.ibm.com> | 2024-04-17 13:38:00 +0200 |
| commit | 236f324b747370b97030c9582591f459353e3589 (patch) | |
| tree | c1cad8fed47b484f890cf1be63de25c229c05ef3 /arch/s390 | |
| parent | bbe72f39022270c40dc1e991b4dadf6f32eed86a (diff) | |
s390/mm: Create virtual memory layout structure
This is a preparatory rework to allow uncoupling virtual
and physical addresses spaces.
Put virtual memory layout information into a structure
to improve code generation when accessing the structure
members, which are currently only ident_map_size and
__kaslr_offset.
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/boot/startup.c | 3 | ||||
| -rw-r--r-- | arch/s390/include/asm/page.h | 11 | ||||
| -rw-r--r-- | arch/s390/kernel/setup.c | 3 |
3 files changed, 12 insertions, 5 deletions
diff --git a/arch/s390/boot/startup.c b/arch/s390/boot/startup.c index ebd8d8dc3bea..8afb232d7c96 100644 --- a/arch/s390/boot/startup.c +++ b/arch/s390/boot/startup.c @@ -19,7 +19,7 @@ #include "boot.h" #include "uv.h" -unsigned long __bootdata_preserved(__kaslr_offset); +struct vm_layout __bootdata_preserved(vm_layout); unsigned long __bootdata_preserved(__abs_lowcore); unsigned long __bootdata_preserved(__memcpy_real_area); pte_t *__bootdata_preserved(memcpy_real_ptep); @@ -30,7 +30,6 @@ unsigned long __bootdata_preserved(vmemmap_size); unsigned long __bootdata_preserved(MODULES_VADDR); unsigned long __bootdata_preserved(MODULES_END); unsigned long __bootdata_preserved(max_mappable); -unsigned long __bootdata(ident_map_size); u64 __bootdata_preserved(stfle_fac_list[16]); u64 __bootdata_preserved(alt_stfle_fac_list[16]); diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h index 602e8056b7cc..f13a4527bf2d 100644 --- a/arch/s390/include/asm/page.h +++ b/arch/s390/include/asm/page.h @@ -178,7 +178,16 @@ int arch_make_page_accessible(struct page *page); #define HAVE_ARCH_MAKE_PAGE_ACCESSIBLE #endif -extern unsigned long __kaslr_offset; +struct vm_layout { + unsigned long kaslr_offset; + unsigned long identity_size; +}; + +extern struct vm_layout vm_layout; + +#define __kaslr_offset vm_layout.kaslr_offset +#define ident_map_size vm_layout.identity_size + static inline unsigned long kaslr_offset(void) { return __kaslr_offset; diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 24ed33f044ec..b9d70869bc36 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -146,10 +146,9 @@ static u32 __amode31_ref *__ctl_linkage_stack = __ctl_linkage_stack_amode31; static u32 __amode31_ref *__ctl_duct = __ctl_duct_amode31; unsigned long __bootdata_preserved(max_mappable); -unsigned long __bootdata(ident_map_size); struct physmem_info __bootdata(physmem_info); -unsigned long __bootdata_preserved(__kaslr_offset); +struct vm_layout __bootdata_preserved(vm_layout); int __bootdata_preserved(__kaslr_enabled); unsigned int __bootdata_preserved(zlib_dfltcc_support); EXPORT_SYMBOL(zlib_dfltcc_support); |