diff options
| -rw-r--r-- | Documentation/arch/s390/index.rst | 1 | ||||
| -rw-r--r-- | Documentation/arch/s390/mm.rst | 111 | ||||
| -rw-r--r-- | arch/s390/boot/boot.h | 7 | ||||
| -rw-r--r-- | arch/s390/boot/kaslr.c | 2 | ||||
| -rw-r--r-- | arch/s390/boot/startup.c | 55 | ||||
| -rw-r--r-- | arch/s390/boot/vmem.c | 111 | ||||
| -rw-r--r-- | arch/s390/include/asm/page.h | 14 | ||||
| -rw-r--r-- | arch/s390/include/asm/pgtable.h | 6 | ||||
| -rw-r--r-- | arch/s390/mm/vmem.c | 2 |
9 files changed, 241 insertions, 68 deletions
diff --git a/Documentation/arch/s390/index.rst b/Documentation/arch/s390/index.rst index 73c79bf586fd..e75a6e5d2505 100644 --- a/Documentation/arch/s390/index.rst +++ b/Documentation/arch/s390/index.rst @@ -8,6 +8,7 @@ s390 Architecture cds 3270 driver-model + mm monreader qeth s390dbf diff --git a/Documentation/arch/s390/mm.rst b/Documentation/arch/s390/mm.rst new file mode 100644 index 000000000000..084adad5eef9 --- /dev/null +++ b/Documentation/arch/s390/mm.rst @@ -0,0 +1,111 @@ +.. SPDX-License-Identifier: GPL-2.0 + +================= +Memory Management +================= + +Virtual memory layout +===================== + +.. note:: + + - Some aspects of the virtual memory layout setup are not + clarified (number of page levels, alignment, DMA memory). + + - Unused gaps in the virtual memory layout could be present + or not - depending on how partucular system is configured. + No page tables are created for the unused gaps. + + - The virtual memory regions are tracked or untracked by KASAN + instrumentation, as well as the KASAN shadow memory itself is + created only when CONFIG_KASAN configuration option is enabled. + +:: + + ============================================================================= + | Physical | Virtual | VM area description + ============================================================================= + +- 0 --------------+- 0 --------------+ + | | S390_lowcore | Low-address memory + | +- 8 KB -----------+ + | | | + | | | + | | ... unused gap | KASAN untracked + | | | + +- AMODE31_START --+- AMODE31_START --+ .amode31 rand. phys/virt start + |.amode31 text/data|.amode31 text/data| KASAN untracked + +- AMODE31_END ----+- AMODE31_END ----+ .amode31 rand. phys/virt end (<2GB) + | | | + | | | + +- __kaslr_offset_phys | kernel rand. phys start + | | | + | kernel text/data | | + | | | + +------------------+ | kernel phys end + | | | + | | | + | | | + | | | + +- ident_map_size -+ | + | | + | ... unused gap | KASAN untracked + | | + +- __identity_base + identity mapping start (>= 2GB) + | | + | identity | phys == virt - __identity_base + | mapping | virt == phys + __identity_base + | | + | | KASAN tracked + | | + | | + | | + | | + | | + | | + | | + | | + | | + | | + | | + | | + | | + | | + | | + +---- vmemmap -----+ 'struct page' array start + | | + | virtually mapped | + | memory map | KASAN untracked + | | + +- __abs_lowcore --+ + | | + | Absolute Lowcore | KASAN untracked + | | + +- __memcpy_real_area + | | + | Real Memory Copy| KASAN untracked + | | + +- VMALLOC_START --+ vmalloc area start + | | KASAN untracked or + | vmalloc area | KASAN shallowly populated in case + | | CONFIG_KASAN_VMALLOC=y + +- MODULES_VADDR --+ modules area start + | | KASAN allocated per module or + | modules area | KASAN shallowly populated in case + | | CONFIG_KASAN_VMALLOC=y + +- __kaslr_offset -+ kernel rand. virt start + | | KASAN tracked + | kernel text/data | phys == (kvirt - __kaslr_offset) + + | | __kaslr_offset_phys + +- kernel .bss end + kernel rand. virt end + | | + | ... unused gap | KASAN untracked + | | + +------------------+ UltraVisor Secure Storage limit + | | + | ... unused gap | KASAN untracked + | | + +KASAN_SHADOW_START+ KASAN shadow memory start + | | + | KASAN shadow | KASAN untracked + | | + +------------------+ ASCE limit diff --git a/arch/s390/boot/boot.h b/arch/s390/boot/boot.h index 567d60f78bbc..412cdd490403 100644 --- a/arch/s390/boot/boot.h +++ b/arch/s390/boot/boot.h @@ -74,10 +74,11 @@ void sclp_early_setup_buffer(void); void print_pgm_check_info(void); unsigned long randomize_within_range(unsigned long size, unsigned long align, unsigned long min, unsigned long max); -void setup_vmem(unsigned long asce_limit); +void setup_vmem(unsigned long kernel_start, unsigned long kernel_end, unsigned long asce_limit); void __printf(1, 2) decompressor_printk(const char *fmt, ...); void print_stacktrace(unsigned long sp); void error(char *m); +int get_random(unsigned long limit, unsigned long *value); extern struct machine_info machine; @@ -98,6 +99,10 @@ extern struct vmlinux_info _vmlinux_info; #define vmlinux _vmlinux_info #define __abs_lowcore_pa(x) (((unsigned long)(x) - __abs_lowcore) % sizeof(struct lowcore)) +#define __kernel_va(x) ((void *)((unsigned long)(x) - __kaslr_offset_phys + __kaslr_offset)) +#define __kernel_pa(x) ((unsigned long)(x) - __kaslr_offset + __kaslr_offset_phys) +#define __identity_va(x) ((void *)((unsigned long)(x) + __identity_base)) +#define __identity_pa(x) ((unsigned long)(x) - __identity_base) static inline bool intersects(unsigned long addr0, unsigned long size0, unsigned long addr1, unsigned long size1) diff --git a/arch/s390/boot/kaslr.c b/arch/s390/boot/kaslr.c index 90602101e2ae..bd3bf5ef472d 100644 --- a/arch/s390/boot/kaslr.c +++ b/arch/s390/boot/kaslr.c @@ -43,7 +43,7 @@ static int check_prng(void) return PRNG_MODE_TDES; } -static int get_random(unsigned long limit, unsigned long *value) +int get_random(unsigned long limit, unsigned long *value) { struct prng_parm prng = { /* initial parameter block for tdes mode, copied from libica */ diff --git a/arch/s390/boot/startup.c b/arch/s390/boot/startup.c index 44ef08518f37..3efa1f457451 100644 --- a/arch/s390/boot/startup.c +++ b/arch/s390/boot/startup.c @@ -203,7 +203,7 @@ static void kaslr_adjust_relocs(unsigned long min_addr, unsigned long max_addr, /* Adjust R_390_64 relocations */ for (reloc = vmlinux_relocs_64_start; reloc < vmlinux_relocs_64_end; reloc++) { - loc = (long)*reloc + offset; + loc = (long)*reloc + phys_offset; if (loc < min_addr || loc > max_addr) error("64-bit relocation outside of kernel!\n"); *(u64 *)loc += offset; @@ -263,8 +263,25 @@ static void setup_ident_map_size(unsigned long max_physmem_end) #endif } -static unsigned long setup_kernel_memory_layout(void) +#define FIXMAP_SIZE round_up(MEMCPY_REAL_SIZE + ABS_LOWCORE_MAP_SIZE, sizeof(struct lowcore)) + +static unsigned long get_vmem_size(unsigned long identity_size, + unsigned long vmemmap_size, + unsigned long vmalloc_size, + unsigned long rte_size) +{ + unsigned long max_mappable, vsize; + + max_mappable = max(identity_size, MAX_DCSS_ADDR); + vsize = round_up(SZ_2G + max_mappable, rte_size) + + round_up(vmemmap_size, rte_size) + + FIXMAP_SIZE + MODULES_LEN + KASLR_LEN; + return size_add(vsize, vmalloc_size); +} + +static unsigned long setup_kernel_memory_layout(unsigned long kernel_size) { + unsigned long kernel_start, kernel_end; unsigned long vmemmap_start; unsigned long asce_limit; unsigned long rte_size; @@ -277,12 +294,11 @@ static unsigned long setup_kernel_memory_layout(void) vmemmap_size = SECTION_ALIGN_UP(pages) * sizeof(struct page); /* choose kernel address space layout: 4 or 3 levels. */ - vsize = round_up(ident_map_size, _REGION3_SIZE) + vmemmap_size + - MODULES_LEN + MEMCPY_REAL_SIZE + ABS_LOWCORE_MAP_SIZE; - vsize = size_add(vsize, vmalloc_size); + vsize = get_vmem_size(ident_map_size, vmemmap_size, vmalloc_size, _REGION3_SIZE); if (IS_ENABLED(CONFIG_KASAN) || (vsize > _REGION2_SIZE)) { asce_limit = _REGION1_SIZE; rte_size = _REGION2_SIZE; + vsize = get_vmem_size(ident_map_size, vmemmap_size, vmalloc_size, _REGION2_SIZE); } else { asce_limit = _REGION2_SIZE; rte_size = _REGION3_SIZE; @@ -298,12 +314,26 @@ static unsigned long setup_kernel_memory_layout(void) /* force vmalloc and modules below kasan shadow */ vmax = min(vmax, KASAN_SHADOW_START); #endif - MODULES_END = round_down(vmax, _SEGMENT_SIZE); + kernel_end = vmax; + if (kaslr_enabled()) { + unsigned long kaslr_len, slots, pos; + + vsize = min(vsize, vmax); + kaslr_len = max(KASLR_LEN, vmax - vsize); + slots = DIV_ROUND_UP(kaslr_len - kernel_size, THREAD_SIZE); + if (get_random(slots, &pos)) + pos = 0; + kernel_end -= pos * THREAD_SIZE; + } + kernel_start = round_down(kernel_end - kernel_size, THREAD_SIZE); + __kaslr_offset = kernel_start; + + MODULES_END = round_down(kernel_start, _SEGMENT_SIZE); MODULES_VADDR = MODULES_END - MODULES_LEN; VMALLOC_END = MODULES_VADDR; /* allow vmalloc area to occupy up to about 1/2 of the rest virtual space left */ - vsize = (VMALLOC_END - (MEMCPY_REAL_SIZE + ABS_LOWCORE_MAP_SIZE)) / 2; + vsize = (VMALLOC_END - FIXMAP_SIZE) / 2; vsize = round_down(vsize, _SEGMENT_SIZE); vmalloc_size = min(vmalloc_size, vsize); VMALLOC_START = VMALLOC_END - vmalloc_size; @@ -330,6 +360,7 @@ static unsigned long setup_kernel_memory_layout(void) BUILD_BUG_ON(MAX_DCSS_ADDR > (1UL << MAX_PHYSMEM_BITS)); max_mappable = max(ident_map_size, MAX_DCSS_ADDR); max_mappable = min(max_mappable, vmemmap_start); + __identity_base = round_down(vmemmap_start - max_mappable, rte_size); return asce_limit; } @@ -358,7 +389,6 @@ static void setup_vmalloc_size(void) static void kaslr_adjust_vmlinux_info(unsigned long offset) { - *(unsigned long *)(&vmlinux.entry) += offset; vmlinux.bootdata_off += offset; vmlinux.bootdata_preserved_off += offset; #ifdef CONFIG_PIE_BUILD @@ -386,6 +416,7 @@ void startup_kernel(void) unsigned long max_physmem_end; unsigned long vmlinux_lma = 0; unsigned long amode31_lma = 0; + unsigned long kernel_size; unsigned long asce_limit; unsigned long safe_addr; void *img; @@ -417,7 +448,8 @@ void startup_kernel(void) max_physmem_end = detect_max_physmem_end(); setup_ident_map_size(max_physmem_end); setup_vmalloc_size(); - asce_limit = setup_kernel_memory_layout(); + kernel_size = vmlinux.default_lma + vmlinux.image_size + vmlinux.bss_size; + asce_limit = setup_kernel_memory_layout(kernel_size); /* got final ident_map_size, physmem allocations could be performed now */ physmem_set_usable_limit(ident_map_size); detect_physmem_online_ranges(max_physmem_end); @@ -432,7 +464,6 @@ void startup_kernel(void) if (vmlinux_lma) { __kaslr_offset_phys = vmlinux_lma - vmlinux.default_lma; kaslr_adjust_vmlinux_info(__kaslr_offset_phys); - __kaslr_offset = __kaslr_offset_phys; } } vmlinux_lma = vmlinux_lma ?: vmlinux.default_lma; @@ -472,7 +503,7 @@ void startup_kernel(void) __kaslr_offset, __kaslr_offset_phys); kaslr_adjust_got(__kaslr_offset); free_relocs(); - setup_vmem(asce_limit); + setup_vmem(__kaslr_offset, __kaslr_offset + kernel_size, asce_limit); copy_bootdata(); /* @@ -484,7 +515,7 @@ void startup_kernel(void) /* * Jump to the decompressed kernel entry point and switch DAT mode on. */ - psw.addr = vmlinux.entry; + psw.addr = __kaslr_offset + vmlinux.entry; psw.mask = PSW_KERNEL_BITS; __load_psw(psw); } diff --git a/arch/s390/boot/vmem.c b/arch/s390/boot/vmem.c index 09b10bb6e4d0..86edd432e593 100644 --- a/arch/s390/boot/vmem.c +++ b/arch/s390/boot/vmem.c @@ -27,6 +27,8 @@ enum populate_mode { POPULATE_NONE, POPULATE_DIRECT, POPULATE_ABS_LOWCORE, + POPULATE_IDENTITY, + POPULATE_KERNEL, #ifdef CONFIG_KASAN POPULATE_KASAN_MAP_SHADOW, POPULATE_KASAN_ZERO_SHADOW, @@ -54,7 +56,7 @@ static inline void kasan_populate(unsigned long start, unsigned long end, enum p pgtable_populate(start, end, mode); } -static void kasan_populate_shadow(void) +static void kasan_populate_shadow(unsigned long kernel_start, unsigned long kernel_end) { pmd_t pmd_z = __pmd(__pa(kasan_early_shadow_pte) | _SEGMENT_ENTRY); pud_t pud_z = __pud(__pa(kasan_early_shadow_pmd) | _REGION3_ENTRY); @@ -76,44 +78,20 @@ static void kasan_populate_shadow(void) __arch_set_page_dat(kasan_early_shadow_pmd, 1UL << CRST_ALLOC_ORDER); __arch_set_page_dat(kasan_early_shadow_pte, 1); - /* - * Current memory layout: - * +- 0 -------------+ +- shadow start -+ - * |1:1 ident mapping| /|1/8 of ident map| - * | | / | | - * +-end of ident map+ / +----------------+ - * | ... gap ... | / | kasan | - * | | / | zero page | - * +- vmalloc area -+ / | mapping | - * | vmalloc_size | / | (untracked) | - * +- modules vaddr -+ / +----------------+ - * | 2Gb |/ | unmapped | allocated per module - * +- shadow start -+ +----------------+ - * | 1/8 addr space | | zero pg mapping| (untracked) - * +- shadow end ----+---------+- shadow end ---+ - * - * Current memory layout (KASAN_VMALLOC): - * +- 0 -------------+ +- shadow start -+ - * |1:1 ident mapping| /|1/8 of ident map| - * | | / | | - * +-end of ident map+ / +----------------+ - * | ... gap ... | / | kasan zero page| (untracked) - * | | / | mapping | - * +- vmalloc area -+ / +----------------+ - * | vmalloc_size | / |shallow populate| - * +- modules vaddr -+ / +----------------+ - * | 2Gb |/ |shallow populate| - * +- shadow start -+ +----------------+ - * | 1/8 addr space | | zero pg mapping| (untracked) - * +- shadow end ----+---------+- shadow end ---+ - */ - for_each_physmem_usable_range(i, &start, &end) { - kasan_populate(start, end, POPULATE_KASAN_MAP_SHADOW); - if (memgap_start && physmem_info.info_source == MEM_DETECT_DIAG260) - kasan_populate(memgap_start, start, POPULATE_KASAN_ZERO_SHADOW); + kasan_populate((unsigned long)__identity_va(start), + (unsigned long)__identity_va(end), + POPULATE_KASAN_MAP_SHADOW); + if (memgap_start && physmem_info.info_source == MEM_DETECT_DIAG260) { + kasan_populate((unsigned long)__identity_va(memgap_start), + (unsigned long)__identity_va(start), + POPULATE_KASAN_ZERO_SHADOW); + } memgap_start = end; } + kasan_populate(kernel_start, kernel_end, POPULATE_KASAN_MAP_SHADOW); + kasan_populate(0, (unsigned long)__identity_va(0), POPULATE_KASAN_ZERO_SHADOW); + kasan_populate(AMODE31_START, AMODE31_END, POPULATE_KASAN_ZERO_SHADOW); if (IS_ENABLED(CONFIG_KASAN_VMALLOC)) { untracked_end = VMALLOC_START; /* shallowly populate kasan shadow for vmalloc and modules */ @@ -122,8 +100,9 @@ static void kasan_populate_shadow(void) untracked_end = MODULES_VADDR; } /* populate kasan shadow for untracked memory */ - kasan_populate(ident_map_size, untracked_end, POPULATE_KASAN_ZERO_SHADOW); - kasan_populate(MODULES_END, _REGION1_SIZE, POPULATE_KASAN_ZERO_SHADOW); + kasan_populate((unsigned long)__identity_va(ident_map_size), untracked_end, + POPULATE_KASAN_ZERO_SHADOW); + kasan_populate(kernel_end, _REGION1_SIZE, POPULATE_KASAN_ZERO_SHADOW); } static bool kasan_pgd_populate_zero_shadow(pgd_t *pgd, unsigned long addr, @@ -180,7 +159,9 @@ static bool kasan_pte_populate_zero_shadow(pte_t *pte, enum populate_mode mode) } #else -static inline void kasan_populate_shadow(void) {} +static inline void kasan_populate_shadow(unsigned long kernel_start, unsigned long kernel_end) +{ +} static inline bool kasan_pgd_populate_zero_shadow(pgd_t *pgd, unsigned long addr, unsigned long end, enum populate_mode mode) @@ -263,6 +244,10 @@ static unsigned long _pa(unsigned long addr, unsigned long size, enum populate_m return addr; case POPULATE_ABS_LOWCORE: return __abs_lowcore_pa(addr); + case POPULATE_KERNEL: + return __kernel_pa(addr); + case POPULATE_IDENTITY: + return __identity_pa(addr); #ifdef CONFIG_KASAN case POPULATE_KASAN_MAP_SHADOW: addr = physmem_alloc_top_down(RR_VMEM, size, size); @@ -274,15 +259,22 @@ static unsigned long _pa(unsigned long addr, unsigned long size, enum populate_m } } -static bool can_large_pud(pud_t *pu_dir, unsigned long addr, unsigned long end) +static bool large_allowed(enum populate_mode mode) +{ + return (mode == POPULATE_DIRECT) || (mode == POPULATE_IDENTITY); +} + +static bool can_large_pud(pud_t *pu_dir, unsigned long addr, unsigned long end, + enum populate_mode mode) { - return machine.has_edat2 && + return machine.has_edat2 && large_allowed(mode) && IS_ALIGNED(addr, PUD_SIZE) && (end - addr) >= PUD_SIZE; } -static bool can_large_pmd(pmd_t *pm_dir, unsigned long addr, unsigned long end) +static bool can_large_pmd(pmd_t *pm_dir, unsigned long addr, unsigned long end, + enum populate_mode mode) { - return machine.has_edat1 && + return machine.has_edat1 && large_allowed(mode) && IS_ALIGNED(addr, PMD_SIZE) && (end - addr) >= PMD_SIZE; } @@ -322,7 +314,7 @@ static void pgtable_pmd_populate(pud_t *pud, unsigned long addr, unsigned long e if (pmd_none(*pmd)) { if (kasan_pmd_populate_zero_shadow(pmd, addr, next, mode)) continue; - if (can_large_pmd(pmd, addr, next)) { + if (can_large_pmd(pmd, addr, next, mode)) { entry = __pmd(_pa(addr, _SEGMENT_SIZE, mode)); entry = set_pmd_bit(entry, SEGMENT_KERNEL); if (!machine.has_nx) @@ -355,7 +347,7 @@ static void pgtable_pud_populate(p4d_t *p4d, unsigned long addr, unsigned long e if (pud_none(*pud)) { if (kasan_pud_populate_zero_shadow(pud, addr, next, mode)) continue; - if (can_large_pud(pud, addr, next)) { + if (can_large_pud(pud, addr, next, mode)) { entry = __pud(_pa(addr, _REGION3_SIZE, mode)); entry = set_pud_bit(entry, REGION3_KERNEL); if (!machine.has_nx) @@ -418,11 +410,12 @@ static void pgtable_populate(unsigned long addr, unsigned long end, enum populat } } -void setup_vmem(unsigned long asce_limit) +void setup_vmem(unsigned long kernel_start, unsigned long kernel_end, unsigned long asce_limit) { unsigned long start, end; unsigned long asce_type; unsigned long asce_bits; + pgd_t *init_mm_pgd; int i; /* @@ -433,6 +426,15 @@ void setup_vmem(unsigned long asce_limit) for_each_physmem_online_range(i, &start, &end) __arch_set_page_nodat((void *)start, (end - start) >> PAGE_SHIFT); + /* + * init_mm->pgd contains virtual address of swapper_pg_dir. + * It is unusable at this stage since DAT is yet off. Swap + * it for physical address of swapper_pg_dir and restore + * the virtual address after all page tables are created. + */ + init_mm_pgd = init_mm.pgd; + init_mm.pgd = (pgd_t *)swapper_pg_dir; + if (asce_limit == _REGION1_SIZE) { asce_type = _REGION2_ENTRY_EMPTY; asce_bits = _ASCE_TYPE_REGION2 | _ASCE_TABLE_LENGTH; @@ -451,17 +453,25 @@ void setup_vmem(unsigned long asce_limit) * To allow prefixing the lowcore must be mapped with 4KB pages. * To prevent creation of a large page at address 0 first map * the lowcore and create the identity mapping only afterwards. + * + * Skip 0x100000 bytes for kernel pgtables, as per the linker script: + * . = 0x100000; */ pgtable_populate(0, sizeof(struct lowcore), POPULATE_DIRECT); - for_each_physmem_usable_range(i, &start, &end) - pgtable_populate(start, end, POPULATE_DIRECT); + for_each_physmem_usable_range(i, &start, &end) { + pgtable_populate((unsigned long)__identity_va(start), + (unsigned long)__identity_va(end), + POPULATE_IDENTITY); + } + pgtable_populate(kernel_start + 0x100000, kernel_end, POPULATE_KERNEL); + pgtable_populate(AMODE31_START, AMODE31_END, POPULATE_DIRECT); pgtable_populate(__abs_lowcore, __abs_lowcore + sizeof(struct lowcore), POPULATE_ABS_LOWCORE); pgtable_populate(__memcpy_real_area, __memcpy_real_area + PAGE_SIZE, POPULATE_NONE); - memcpy_real_ptep = __virt_to_kpte(__memcpy_real_area); + memcpy_real_ptep = __identity_va(__virt_to_kpte(__memcpy_real_area)); - kasan_populate_shadow(); + kasan_populate_shadow(kernel_start + 0x100000, kernel_end); S390_lowcore.kernel_asce.val = swapper_pg_dir | asce_bits; S390_lowcore.user_asce = s390_invalid_asce; @@ -471,4 +481,5 @@ void setup_vmem(unsigned long asce_limit) local_ctl_load(13, &S390_lowcore.kernel_asce); init_mm.context.asce = S390_lowcore.kernel_asce.val; + init_mm.pgd = init_mm_pgd; } diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h index 95403750d25a..b39d724ab6f6 100644 --- a/arch/s390/include/asm/page.h +++ b/arch/s390/include/asm/page.h @@ -208,16 +208,22 @@ static inline int kaslr_enabled(void) #define __PAGE_OFFSET __identity_base #define PAGE_OFFSET __PAGE_OFFSET -#define __pa_nodebug(x) ((unsigned long)(x)) - #ifdef __DECOMPRESSOR +#define __pa_nodebug(x) ((unsigned long)(x)) #define __pa(x) __pa_nodebug(x) #define __pa32(x) __pa(x) #define __va(x) ((void *)(unsigned long)(x)) #else /* __DECOMPRESSOR */ +static inline unsigned long __pa_nodebug(unsigned long x) +{ + if (x < __kaslr_offset) + return x - __identity_base; + return x - __kaslr_offset + __kaslr_offset_phys; +} + #ifdef CONFIG_DEBUG_VIRTUAL unsigned long __phys_addr(unsigned long x, bool is_31bit); @@ -233,7 +239,7 @@ static inline unsigned long __phys_addr(unsigned long x, bool is_31bit) #define __pa(x) __phys_addr((unsigned long)(x), false) #define __pa32(x) __phys_addr((unsigned long)(x), true) -#define __va(x) ((void *)(unsigned long)(x)) +#define __va(x) ((void *)((unsigned long)(x) + __identity_base)) #endif /* __DECOMPRESSOR */ @@ -258,7 +264,7 @@ static inline unsigned long virt_to_pfn(const void *kaddr) #define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr)) #define page_to_virt(page) pfn_to_virt(page_to_pfn(page)) -#define virt_addr_valid(kaddr) pfn_valid(phys_to_pfn(__pa_nodebug(kaddr))) +#define virt_addr_valid(kaddr) pfn_valid(phys_to_pfn(__pa_nodebug((unsigned long)(kaddr)))) #define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index 60950e7a25f5..0f6321ff427b 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -107,6 +107,12 @@ static inline int is_module_addr(void *addr) return 1; } +#ifdef CONFIG_RANDOMIZE_BASE +#define KASLR_LEN (1UL << 31) +#else +#define KASLR_LEN 0UL +#endif + /* * A 64 bit pagetable entry of S390 has following format: * | PFRA |0IPC| OS | diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c index 917b8a37383a..41c714e21292 100644 --- a/arch/s390/mm/vmem.c +++ b/arch/s390/mm/vmem.c @@ -15,6 +15,7 @@ #include <asm/page-states.h> #include <asm/abs_lowcore.h> #include <asm/cacheflush.h> +#include <asm/maccess.h> #include <asm/nospec-branch.h> #include <asm/ctlreg.h> #include <asm/pgalloc.h> @@ -22,6 +23,7 @@ #include <asm/tlbflush.h> #include <asm/sections.h> #include <asm/set_memory.h> +#include <asm/physmem_info.h> static DEFINE_MUTEX(vmem_mutex); |