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[S390] revert add_active_range() usage patch.

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Commit 7676bef9c1 breaks DCSS support on
s390. DCSS needs initialized struct pages to work. With the usage of
add_active_range() only the struct pages for physically present pages
are initialized.
This could be fixed if the DCSS driver would initiliaze the struct pages
itself, but this doesn't work too. This is because the mem_map array
does not include holes after the last present memory area and therefore
there is nothing that could be initialized.
To fix this and to avoid some dirty hacks revert this patch for now.
Will be added later when we move to a virtual mem_map.

Cc: Carsten Otte <cotte@de.ibm.com>
Cc: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2006-11-06 10:49:00 +01:00 committed by Martin Schwidefsky
parent d1ed6a3ea1
commit bcc8bcb1f0
4 changed files with 63 additions and 26 deletions
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3
arch/s390/Kconfig
View File

@ -236,9 +236,6 @@ config WARN_STACK_SIZE
This allows you to specify the maximum frame size a function may
have without the compiler complaining about it.
config ARCH_POPULATES_NODE_MAP
def_bool y
source "mm/Kconfig"
comment "I/O subsystem configuration"

1
arch/s390/defconfig
View File

@ -119,7 +119,6 @@ CONFIG_PACK_STACK=y
CONFIG_CHECK_STACK=y
CONFIG_STACK_GUARD=256
# CONFIG_WARN_STACK is not set
CONFIG_ARCH_POPULATES_NODE_MAP=y
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
# CONFIG_DISCONTIGMEM_MANUAL is not set

53
arch/s390/kernel/setup.c
View File

@ -70,6 +70,7 @@ struct {
#define CHUNK_READ_WRITE 0
#define CHUNK_READ_ONLY 1
volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */
unsigned long __initdata zholes_size[MAX_NR_ZONES];
static unsigned long __initdata memory_end;
/*
@ -357,6 +358,21 @@ void machine_power_off(void)
*/
void (*pm_power_off)(void) = machine_power_off;
static void __init
add_memory_hole(unsigned long start, unsigned long end)
{
unsigned long dma_pfn = MAX_DMA_ADDRESS >> PAGE_SHIFT;
if (end <= dma_pfn)
zholes_size[ZONE_DMA] += end - start + 1;
else if (start > dma_pfn)
zholes_size[ZONE_NORMAL] += end - start + 1;
else {
zholes_size[ZONE_DMA] += dma_pfn - start + 1;
zholes_size[ZONE_NORMAL] += end - dma_pfn;
}
}
static int __init early_parse_mem(char *p)
{
memory_end = memparse(p, &p);
@ -478,6 +494,7 @@ setup_memory(void)
{
unsigned long bootmap_size;
unsigned long start_pfn, end_pfn, init_pfn;
unsigned long last_rw_end;
int i;
/*
@ -533,27 +550,39 @@ setup_memory(void)
/*
* Register RAM areas with the bootmem allocator.
*/
last_rw_end = start_pfn;
for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
unsigned long start_chunk, end_chunk, pfn;
unsigned long start_chunk, end_chunk;
if (memory_chunk[i].type != CHUNK_READ_WRITE)
continue;
start_chunk = PFN_DOWN(memory_chunk[i].addr);
end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size) - 1;
end_chunk = min(end_chunk, end_pfn);
if (start_chunk >= end_chunk)
continue;
add_active_range(0, start_chunk, end_chunk);
pfn = max(start_chunk, start_pfn);
for (; pfn <= end_chunk; pfn++)
page_set_storage_key(PFN_PHYS(pfn), PAGE_DEFAULT_KEY);
start_chunk = (memory_chunk[i].addr + PAGE_SIZE - 1);
start_chunk >>= PAGE_SHIFT;
end_chunk = (memory_chunk[i].addr + memory_chunk[i].size);
end_chunk >>= PAGE_SHIFT;
if (start_chunk < start_pfn)
start_chunk = start_pfn;
if (end_chunk > end_pfn)
end_chunk = end_pfn;
if (start_chunk < end_chunk) {
/* Initialize storage key for RAM pages */
for (init_pfn = start_chunk ; init_pfn < end_chunk;
init_pfn++)
page_set_storage_key(init_pfn << PAGE_SHIFT,
PAGE_DEFAULT_KEY);
free_bootmem(start_chunk << PAGE_SHIFT,
(end_chunk - start_chunk) << PAGE_SHIFT);
if (last_rw_end < start_chunk)
add_memory_hole(last_rw_end, start_chunk - 1);
last_rw_end = end_chunk;
}
}
psw_set_key(PAGE_DEFAULT_KEY);
free_bootmem_with_active_regions(0, max_pfn);
reserve_bootmem(0, PFN_PHYS(start_pfn));
if (last_rw_end < end_pfn - 1)
add_memory_hole(last_rw_end, end_pfn - 1);
/*
* Reserve the bootmem bitmap itself as well. We do this in two

32
arch/s390/mm/init.c
View File

@ -84,6 +84,7 @@ void show_mem(void)
printk("%d pages swap cached\n",cached);
}
extern unsigned long __initdata zholes_size[];
/*
* paging_init() sets up the page tables
*/
@ -100,15 +101,16 @@ void __init paging_init(void)
unsigned long pgdir_k = (__pa(swapper_pg_dir) & PAGE_MASK) | _KERNSEG_TABLE;
static const int ssm_mask = 0x04000000L;
unsigned long ro_start_pfn, ro_end_pfn;
unsigned long max_zone_pfns[MAX_NR_ZONES];
unsigned long zones_size[MAX_NR_ZONES];
ro_start_pfn = PFN_DOWN((unsigned long)&__start_rodata);
ro_end_pfn = PFN_UP((unsigned long)&__end_rodata);
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
max_zone_pfns[ZONE_DMA] = max_low_pfn;
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
free_area_init_nodes(max_zone_pfns);
memset(zones_size, 0, sizeof(zones_size));
zones_size[ZONE_DMA] = max_low_pfn;
free_area_init_node(0, &contig_page_data, zones_size,
__pa(PAGE_OFFSET) >> PAGE_SHIFT,
zholes_size);
/* unmap whole virtual address space */
@ -168,16 +170,26 @@ void __init paging_init(void)
unsigned long pgdir_k = (__pa(swapper_pg_dir) & PAGE_MASK) |
_KERN_REGION_TABLE;
static const int ssm_mask = 0x04000000L;
unsigned long zones_size[MAX_NR_ZONES];
unsigned long dma_pfn, high_pfn;
unsigned long ro_start_pfn, ro_end_pfn;
unsigned long max_zone_pfns[MAX_NR_ZONES];
memset(zones_size, 0, sizeof(zones_size));
dma_pfn = MAX_DMA_ADDRESS >> PAGE_SHIFT;
high_pfn = max_low_pfn;
ro_start_pfn = PFN_DOWN((unsigned long)&__start_rodata);
ro_end_pfn = PFN_UP((unsigned long)&__end_rodata);
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
max_zone_pfns[ZONE_DMA] = PFN_DOWN(MAX_DMA_ADDRESS);
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
free_area_init_nodes(max_zone_pfns);
if (dma_pfn > high_pfn)
zones_size[ZONE_DMA] = high_pfn;
else {
zones_size[ZONE_DMA] = dma_pfn;
zones_size[ZONE_NORMAL] = high_pfn - dma_pfn;
}
/* Initialize mem_map[]. */
free_area_init_node(0, &contig_page_data, zones_size,
__pa(PAGE_OFFSET) >> PAGE_SHIFT, zholes_size);
/*
* map whole physical memory to virtual memory (identity mapping)