xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

s390/mem_detect: move tprot loop to early boot phase

Browse Source 
Move memory detection to early boot phase. To store online memory
regions "struct mem_detect_info" has been introduced together with
for_each_mem_detect_block iterator. mem_detect_info is later converted
to memblock.

Also introduces sclp_early_get_meminfo function to get maximum physical
memory and maximum increment number.

Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Vasily Gorbik
2018-04-11 11:56:55 +02:00
committed by Martin Schwidefsky
parent 17aacfbfa1
commit 6966d604e2
11 changed files with 277 additions and 69 deletions
Download Patch File Download Diff File Expand all files Collapse all files

47
arch/s390/kernel/setup.c
View File

@@ -70,6 +70,7 @@
#include <asm/numa.h>
#include <asm/alternative.h>
#include <asm/nospec-branch.h>
#include <asm/mem_detect.h>
#include "entry.h"
/*
@@ -91,7 +92,8 @@ unsigned long int_hwcap = 0;
int __initdata memory_end_set;
unsigned long __initdata memory_end;
unsigned long __initdata max_physmem_end;
unsigned long __bootdata(max_physmem_end);
struct mem_detect_info __bootdata(mem_detect);
unsigned long VMALLOC_START;
EXPORT_SYMBOL(VMALLOC_START);
@@ -720,6 +722,45 @@ static void __init reserve_initrd(void)
#endif
}
static void __init reserve_mem_detect_info(void)
{
unsigned long start, size;
get_mem_detect_reserved(&start, &size);
if (size)
memblock_reserve(start, size);
}
static void __init free_mem_detect_info(void)
{
unsigned long start, size;
get_mem_detect_reserved(&start, &size);
if (size)
memblock_free(start, size);
}
static void __init memblock_physmem_add(phys_addr_t start, phys_addr_t size)
{
memblock_dbg("memblock_physmem_add: [%#016llx-%#016llx]\n",
start, start + size - 1);
memblock_add_range(&memblock.memory, start, size, 0, 0);
memblock_add_range(&memblock.physmem, start, size, 0, 0);
}
static void __init memblock_add_mem_detect_info(void)
{
unsigned long start, end;
int i;
/* keep memblock lists close to the kernel */
memblock_set_bottom_up(true);
for_each_mem_detect_block(i, &start, &end)
memblock_physmem_add(start, end - start);
memblock_set_bottom_up(false);
memblock_dump_all();
}
/*
* Check for initrd being in usable memory
*/
@@ -984,11 +1025,13 @@ void __init setup_arch(char **cmdline_p)
reserve_oldmem();
reserve_kernel();
reserve_initrd();
reserve_mem_detect_info();
memblock_allow_resize();
/* Get information about *all* installed memory */
detect_memory_memblock();
memblock_add_mem_detect_info();
free_mem_detect_info();
remove_oldmem();
/*