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

[S390] zfcpdump support.

Browse Source 
s390 machines provide hardware support for creating Linux dumps on SCSI
disks. For creating a dump a special purpose dump Linux is used. The first
32 MB of memory are saved by the hardware before the dump Linux is
booted. Via an SCLP interface, the saved memory can be accessed from
Linux. This patch exports memory and registers of the crashed Linux to
userspace via a debugfs file. For more information refer to
Documentation/s390/zfcpdump.txt, which is included in this patch.

Signed-off-by: Michael Holzheu <holzheu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
This commit is contained in:
Michael Holzheu
2007-04-27 16:01:49 +02:00
committed by Martin Schwidefsky
parent 7039d3a11c
commit 411ed32257
17 changed files with 1411 additions and 86 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
arch/s390/kernel/setup.c
View File

@@ -285,6 +285,26 @@ static void __init conmode_default(void)
}
}
#if defined(CONFIG_ZFCPDUMP) || defined(CONFIG_ZFCPDUMP_MODULE)
static void __init setup_zfcpdump(unsigned int console_devno)
{
static char str[64];
if (ipl_info.type != IPL_TYPE_FCP_DUMP)
return;
if (console_devno != -1)
sprintf(str, "cio_ignore=all,!0.0.%04x,!0.0.%04x",
ipl_info.data.fcp.dev_id.devno, console_devno);
else
sprintf(str, "cio_ignore=all,!0.0.%04x",
ipl_info.data.fcp.dev_id.devno);
strcat(COMMAND_LINE, str);
console_loglevel = 2;
}
#else
static inline void setup_zfcpdump(unsigned int console_devno) {}
#endif /* CONFIG_ZFCPDUMP */
#ifdef CONFIG_SMP
void (*_machine_restart)(char *command) = machine_restart_smp;
void (*_machine_halt)(void) = machine_halt_smp;
@@ -586,13 +606,20 @@ setup_resources(void)
}
}
unsigned long real_memory_size;
EXPORT_SYMBOL_GPL(real_memory_size);
static void __init setup_memory_end(void)
{
unsigned long real_size, memory_size;
unsigned long memory_size;
unsigned long max_mem, max_phys;
int i;
memory_size = real_size = 0;
#if defined(CONFIG_ZFCPDUMP) || defined(CONFIG_ZFCPDUMP_MODULE)
if (ipl_info.type == IPL_TYPE_FCP_DUMP)
memory_end = ZFCPDUMP_HSA_SIZE;
#endif
memory_size = 0;
max_phys = VMALLOC_END_INIT - VMALLOC_MIN_SIZE;
memory_end &= PAGE_MASK;
@@ -601,7 +628,8 @@ static void __init setup_memory_end(void)
for (i = 0; i < MEMORY_CHUNKS; i++) {
struct mem_chunk *chunk = &memory_chunk[i];
real_size = max(real_size, chunk->addr + chunk->size);
real_memory_size = max(real_memory_size,
chunk->addr + chunk->size);
if (chunk->addr >= max_mem) {
memset(chunk, 0, sizeof(*chunk));
continue;
@@ -765,6 +793,7 @@ setup_arch(char **cmdline_p)
parse_early_param();
setup_ipl_info();
setup_memory_end();
setup_addressing_mode();
setup_memory();
@@ -782,6 +811,9 @@ setup_arch(char **cmdline_p)
/* Setup default console */
conmode_default();
/* Setup zfcpdump support */
setup_zfcpdump(console_devno);
}
void print_cpu_info(struct cpuinfo_S390 *cpuinfo)