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Diffstat (limited to 'arch/s390/kernel/setup.c')
-rw-r--r--arch/s390/kernel/setup.c62
1 files changed, 35 insertions, 27 deletions
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index c64a95ae830f..4d843e64496f 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -102,7 +102,6 @@ struct mem_detect_info __bootdata(mem_detect);
struct exception_table_entry *__bootdata_preserved(__start_dma_ex_table);
struct exception_table_entry *__bootdata_preserved(__stop_dma_ex_table);
-unsigned long __bootdata_preserved(__swsusp_reset_dma);
unsigned long __bootdata_preserved(__stext_dma);
unsigned long __bootdata_preserved(__etext_dma);
unsigned long __bootdata_preserved(__sdma);
@@ -119,6 +118,7 @@ EXPORT_SYMBOL(VMALLOC_END);
struct page *vmemmap;
EXPORT_SYMBOL(vmemmap);
+unsigned long vmemmap_size;
unsigned long MODULES_VADDR;
unsigned long MODULES_END;
@@ -128,6 +128,12 @@ struct lowcore *lowcore_ptr[NR_CPUS];
EXPORT_SYMBOL(lowcore_ptr);
/*
+ * The Write Back bit position in the physaddr is given by the SLPC PCI.
+ * Leaving the mask zero always uses write through which is safe
+ */
+unsigned long mio_wb_bit_mask __ro_after_init;
+
+/*
* This is set up by the setup-routine at boot-time
* for S390 need to find out, what we have to setup
* using address 0x10400 ...
@@ -245,7 +251,7 @@ static void __init conmode_default(void)
#ifdef CONFIG_CRASH_DUMP
static void __init setup_zfcpdump(void)
{
- if (ipl_info.type != IPL_TYPE_FCP_DUMP)
+ if (!is_ipl_type_dump())
return;
if (OLDMEM_BASE)
return;
@@ -300,7 +306,7 @@ void machine_power_off(void)
void (*pm_power_off)(void) = machine_power_off;
EXPORT_SYMBOL_GPL(pm_power_off);
-void *restart_stack __section(.data);
+void *restart_stack;
unsigned long stack_alloc(void)
{
@@ -366,8 +372,12 @@ void __init arch_call_rest_init(void)
static void __init setup_lowcore_dat_off(void)
{
+ unsigned long int_psw_mask = PSW_KERNEL_BITS;
struct lowcore *lc;
+ if (IS_ENABLED(CONFIG_KASAN))
+ int_psw_mask |= PSW_MASK_DAT;
+
/*
* Setup lowcore for boot cpu
*/
@@ -379,15 +389,15 @@ static void __init setup_lowcore_dat_off(void)
lc->restart_psw.mask = PSW_KERNEL_BITS;
lc->restart_psw.addr = (unsigned long) restart_int_handler;
- lc->external_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
+ lc->external_new_psw.mask = int_psw_mask | PSW_MASK_MCHECK;
lc->external_new_psw.addr = (unsigned long) ext_int_handler;
- lc->svc_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
+ lc->svc_new_psw.mask = int_psw_mask | PSW_MASK_MCHECK;
lc->svc_new_psw.addr = (unsigned long) system_call;
- lc->program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
+ lc->program_new_psw.mask = int_psw_mask | PSW_MASK_MCHECK;
lc->program_new_psw.addr = (unsigned long) pgm_check_handler;
lc->mcck_new_psw.mask = PSW_KERNEL_BITS;
lc->mcck_new_psw.addr = (unsigned long) mcck_int_handler;
- lc->io_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
+ lc->io_new_psw.mask = int_psw_mask | PSW_MASK_MCHECK;
lc->io_new_psw.addr = (unsigned long) io_int_handler;
lc->clock_comparator = clock_comparator_max;
lc->nodat_stack = ((unsigned long) &init_thread_union)
@@ -402,7 +412,6 @@ static void __init setup_lowcore_dat_off(void)
memcpy(lc->alt_stfle_fac_list, S390_lowcore.alt_stfle_fac_list,
sizeof(lc->alt_stfle_fac_list));
nmi_alloc_boot_cpu(lc);
- vdso_alloc_boot_cpu(lc);
lc->sync_enter_timer = S390_lowcore.sync_enter_timer;
lc->async_enter_timer = S390_lowcore.async_enter_timer;
lc->exit_timer = S390_lowcore.exit_timer;
@@ -552,22 +561,17 @@ static void __init setup_memory_end(void)
unsigned long vmax, tmp;
/* Choose kernel address space layout: 3 or 4 levels. */
- if (IS_ENABLED(CONFIG_KASAN)) {
- vmax = IS_ENABLED(CONFIG_KASAN_S390_4_LEVEL_PAGING)
- ? _REGION1_SIZE
- : _REGION2_SIZE;
- } else {
- tmp = (memory_end ?: max_physmem_end) / PAGE_SIZE;
- tmp = tmp * (sizeof(struct page) + PAGE_SIZE);
- if (tmp + vmalloc_size + MODULES_LEN <= _REGION2_SIZE)
- vmax = _REGION2_SIZE; /* 3-level kernel page table */
- else
- vmax = _REGION1_SIZE; /* 4-level kernel page table */
- }
-
+ tmp = (memory_end ?: max_physmem_end) / PAGE_SIZE;
+ tmp = tmp * (sizeof(struct page) + PAGE_SIZE);
+ if (tmp + vmalloc_size + MODULES_LEN <= _REGION2_SIZE)
+ vmax = _REGION2_SIZE; /* 3-level kernel page table */
+ else
+ vmax = _REGION1_SIZE; /* 4-level kernel page table */
if (is_prot_virt_host())
adjust_to_uv_max(&vmax);
-
+#ifdef CONFIG_KASAN
+ vmax = kasan_vmax;
+#endif
/* module area is at the end of the kernel address space. */
MODULES_END = vmax;
MODULES_VADDR = MODULES_END - MODULES_LEN;
@@ -586,9 +590,14 @@ static void __init setup_memory_end(void)
/* Take care that memory_end is set and <= vmemmap */
memory_end = min(memory_end ?: max_physmem_end, (unsigned long)vmemmap);
#ifdef CONFIG_KASAN
- /* fit in kasan shadow memory region between 1:1 and vmemmap */
memory_end = min(memory_end, KASAN_SHADOW_START);
- vmemmap = max(vmemmap, (struct page *)KASAN_SHADOW_END);
+#endif
+ vmemmap_size = SECTION_ALIGN_UP(memory_end / PAGE_SIZE) * sizeof(struct page);
+#ifdef CONFIG_KASAN
+ /* move vmemmap above kasan shadow only if stands in a way */
+ if (KASAN_SHADOW_END > (unsigned long)vmemmap &&
+ (unsigned long)vmemmap + vmemmap_size > KASAN_SHADOW_START)
+ vmemmap = max(vmemmap, (struct page *)KASAN_SHADOW_END);
#endif
max_pfn = max_low_pfn = PFN_DOWN(memory_end);
memblock_remove(memory_end, ULONG_MAX);
@@ -1133,8 +1142,7 @@ void __init setup_arch(char **cmdline_p)
free_mem_detect_info();
remove_oldmem();
- if (is_prot_virt_host())
- setup_uv();
+ setup_uv();
setup_memory_end();
setup_memory();
dma_contiguous_reserve(memory_end);
@@ -1178,7 +1186,7 @@ void __init setup_arch(char **cmdline_p)
if (IS_ENABLED(CONFIG_EXPOLINE))
nospec_init_branches();
- /* Setup zfcpdump support */
+ /* Setup zfcp/nvme dump support */
setup_zfcpdump();
/* Add system specific data to the random pool */