b28e3ecf0d
Same as with the x86 verison of this test, we relied on the contents of
all pages in RAM to be the same across the entire test range, which is
very fragile. Zero the first byte of each page before running the
increment loop to fix this.
Fixes: 5571dc824b ("tests/migration: Enable the migration test on s390x, too")
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Daniil Tatianin <d-tatianin@yandex-team.ru>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-ID: <20230919102346.2117963-4-d-tatianin@yandex-team.ru>
45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
/*
|
|
* S390 guest code used in migration tests
|
|
*
|
|
* Copyright 2018 Thomas Huth, Red Hat Inc.
|
|
*
|
|
* This code is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*/
|
|
|
|
#define LOADPARM_LEN 8 /* Needed for sclp.h */
|
|
|
|
#include <libc.h>
|
|
#include <s390-ccw.h>
|
|
#include <sclp.h>
|
|
|
|
char stack[0x8000] __attribute__((aligned(4096)));
|
|
|
|
#define START_ADDRESS (1024 * 1024)
|
|
#define END_ADDRESS (100 * 1024 * 1024)
|
|
|
|
void main(void)
|
|
{
|
|
unsigned long addr;
|
|
|
|
sclp_setup();
|
|
sclp_print("A");
|
|
|
|
/*
|
|
* Make sure all of the pages have consistent contents before incrementing
|
|
* the first byte below.
|
|
*/
|
|
for (addr = START_ADDRESS; addr < END_ADDRESS; addr += 4096) {
|
|
*(volatile char *)addr = 0;
|
|
}
|
|
|
|
while (1) {
|
|
for (addr = START_ADDRESS; addr < END_ADDRESS; addr += 4096) {
|
|
*(volatile char *)addr += 1; /* Change pages */
|
|
}
|
|
sclp_print("B");
|
|
}
|
|
}
|