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s390/ipl: rely on diag308 store to get ipl info

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For both ccw and fcp boot retrieve ipl info from ipl block received via
diag308 store. Old scsi ipl parm block handling and cio_get_iplinfo are
removed. Ipl type is deducted from ipl block (if valid).

Reviewed-by: Heiko Carstens <heiko.carstens@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 2018-04-03 16:03:08 +02:00 committed by Martin Schwidefsky
parent 283abedb1b
commit d08091ac96
6 changed files with 17 additions and 119 deletions
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23
arch/s390/boot/compressed/misc.c
View File

@ -119,34 +119,12 @@ static void error(char *x)
asm volatile("lpsw %0" : : "Q" (psw));
}
/*
* Safe guard the ipl parameter block against a memory area that will be
* overwritten. The validity check for the ipl parameter block is complex
* (see cio_get_iplinfo and ipl_save_parameters) but if the pointer to
* the ipl parameter block intersects with the passed memory area we can
* safely assume that we can read from that memory. In that case just copy
* the memory to IPL_PARMBLOCK_ORIGIN even if there is no ipl parameter
* block.
*/
static void check_ipl_parmblock(void *start, unsigned long size)
{
void *src, *dst;
src = (void *)(unsigned long) S390_lowcore.ipl_parmblock_ptr;
if (src + PAGE_SIZE <= start || src >= start + size)
return;
dst = (void *) IPL_PARMBLOCK_ORIGIN;
memmove(dst, src, PAGE_SIZE);
S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
}
unsigned long decompress_kernel(void)
{
void *output, *kernel_end;
output = (void *) ALIGN((unsigned long) _end + HEAP_SIZE, PAGE_SIZE);
kernel_end = output + SZ__bss_start;
check_ipl_parmblock((void *) 0, (unsigned long) kernel_end);
#ifdef CONFIG_BLK_DEV_INITRD
/*
@ -156,7 +134,6 @@ unsigned long decompress_kernel(void)
* current bss section..
*/
if (INITRD_START && INITRD_SIZE && kernel_end > (void *) INITRD_START) {
check_ipl_parmblock(kernel_end, INITRD_SIZE);
memmove(kernel_end, (void *) INITRD_START, INITRD_SIZE);
INITRD_START = (unsigned long) kernel_end;
}

8
arch/s390/include/asm/cio.h
View File

@ -330,14 +330,6 @@ extern void css_schedule_reprobe(void);
extern void reipl_ccw_dev(struct ccw_dev_id *id);
struct cio_iplinfo {
u8 ssid;
u16 devno;
int is_qdio;
};
extern int cio_get_iplinfo(struct cio_iplinfo *iplinfo);
/* Function from drivers/s390/cio/chsc.c */
int chsc_sstpc(void *page, unsigned int op, u16 ctrl, u64 *clock_delta);
int chsc_sstpi(void *page, void *result, size_t size);

5
arch/s390/include/asm/ipl.h
View File

@ -15,8 +15,6 @@
#define NSS_NAME_SIZE 8
#define IPL_PARMBLOCK_ORIGIN 0x2000
#define IPL_PARM_BLK_FCP_LEN (sizeof(struct ipl_list_hdr) + \
sizeof(struct ipl_block_fcp))
@ -92,8 +90,7 @@ void __init save_area_add_vxrs(struct save_area *, __vector128 *vxrs);
extern void do_reipl(void);
extern void do_halt(void);
extern void do_poff(void);
extern void ipl_verify_parameters(void);
extern void ipl_update_parameters(void);
extern void ipl_store_parameters(void);
extern size_t append_ipl_vmparm(char *, size_t);
extern size_t append_ipl_scpdata(char *, size_t);

14
arch/s390/kernel/early.c
View File

@ -342,16 +342,6 @@ static __init void memmove_early(void *dst, const void *src, size_t n)
S390_lowcore.program_new_psw = old;
}
static __init noinline void ipl_save_parameters(void)
{
void *src, *dst;
src = (void *)(unsigned long) S390_lowcore.ipl_parmblock_ptr;
dst = (void *) IPL_PARMBLOCK_ORIGIN;
memmove_early(dst, src, PAGE_SIZE);
S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
}
static __init noinline void rescue_initrd(void)
{
#ifdef CONFIG_BLK_DEV_INITRD
@ -421,10 +411,8 @@ static void __init setup_boot_command_line(void)
void __init startup_init(void)
{
reset_tod_clock();
ipl_save_parameters();
rescue_initrd();
clear_bss_section();
ipl_verify_parameters();
time_early_init();
init_kernel_storage_key();
lockdep_off();
@ -432,7 +420,7 @@ void __init startup_init(void)
setup_facility_list();
detect_machine_type();
setup_arch_string();
ipl_update_parameters();
ipl_store_parameters();
setup_boot_command_line();
detect_diag9c();
detect_diag44();

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

@ -24,7 +24,6 @@
#include <asm/smp.h>
#include <asm/setup.h>
#include <asm/cpcmd.h>
#include <asm/cio.h>
#include <asm/ebcdic.h>
#include <asm/reset.h>
#include <asm/sclp.h>
@ -119,16 +118,6 @@ static char *dump_type_str(enum dump_type type)
}
}
enum {
IPL_DEVNO_VALID = 1,
IPL_PARMBLOCK_VALID = 2,
};
/*
* IPL validity flags
*/
static u32 ipl_flags;
enum ipl_method {
REIPL_METHOD_CCW_CIO,
REIPL_METHOD_CCW_DIAG,
@ -150,6 +139,7 @@ enum dump_method {
DUMP_METHOD_FCP_DIAG,
};
static int ipl_block_valid;
static int diag308_set_works;
static struct ipl_parameter_block ipl_block;
@ -280,17 +270,19 @@ static void make_attrs_ro(struct attribute **attrs)
static __init enum ipl_type get_ipl_type(void)
{
if (!(ipl_flags & IPL_DEVNO_VALID))
if (!ipl_block_valid)
return IPL_TYPE_UNKNOWN;
if (!(ipl_flags & IPL_PARMBLOCK_VALID))
switch (ipl_block.hdr.pbt) {
case DIAG308_IPL_TYPE_CCW:
return IPL_TYPE_CCW;
if (ipl_block.hdr.version > IPL_MAX_SUPPORTED_VERSION)
return IPL_TYPE_UNKNOWN;
if (ipl_block.hdr.pbt != DIAG308_IPL_TYPE_FCP)
return IPL_TYPE_UNKNOWN;
if (ipl_block.ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
return IPL_TYPE_FCP_DUMP;
return IPL_TYPE_FCP;
case DIAG308_IPL_TYPE_FCP:
if (ipl_block.ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
return IPL_TYPE_FCP_DUMP;
else
return IPL_TYPE_FCP;
}
return IPL_TYPE_UNKNOWN;
}
struct ipl_info ipl_info;
@ -1949,30 +1941,15 @@ void __init setup_ipl(void)
atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
}
void __init ipl_update_parameters(void)
void __init ipl_store_parameters(void)
{
int rc;
rc = diag308(DIAG308_STORE, &ipl_block);
if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
diag308_set_works = 1;
if (rc != DIAG308_RC_OK && (ipl_flags & IPL_PARMBLOCK_VALID))
memcpy(&ipl_block, (void *)IPL_PARMBLOCK_ORIGIN, PAGE_SIZE);
}
void __init ipl_verify_parameters(void)
{
struct cio_iplinfo iplinfo;
if (cio_get_iplinfo(&iplinfo))
return;
ipl_block.ipl_info.ccw.ssid = iplinfo.ssid;
ipl_block.ipl_info.ccw.devno = iplinfo.devno;
ipl_flags |= IPL_DEVNO_VALID;
if (!iplinfo.is_qdio)
return;
ipl_flags |= IPL_PARMBLOCK_VALID;
if (rc == DIAG308_RC_OK && ipl_block.hdr.version <= IPL_MAX_SUPPORTED_VERSION)
ipl_block_valid = 1;
}
static LIST_HEAD(rcall);

33
drivers/s390/cio/cio.c
View File

@ -990,39 +990,6 @@ void reipl_ccw_dev(struct ccw_dev_id *devid)
do_reipl_asm(*((__u32*)&schid));
}
int __init cio_get_iplinfo(struct cio_iplinfo *iplinfo)
{
static struct chsc_sda_area sda_area __initdata;
struct subchannel_id schid;
struct schib schib;
schid = *(struct subchannel_id *)&S390_lowcore.subchannel_id;
if (!schid.one)
return -ENODEV;
if (schid.ssid) {
/*
* Firmware should have already enabled MSS but whoever started
* the kernel might have initiated a channel subsystem reset.
* Ensure that MSS is enabled.
*/
memset(&sda_area, 0, sizeof(sda_area));
if (__chsc_enable_facility(&sda_area, CHSC_SDA_OC_MSS))
return -ENODEV;
}
if (stsch(schid, &schib))
return -ENODEV;
if (schib.pmcw.st != SUBCHANNEL_TYPE_IO)
return -ENODEV;
if (!schib.pmcw.dnv)
return -ENODEV;
iplinfo->ssid = schid.ssid;
iplinfo->devno = schib.pmcw.dev;
iplinfo->is_qdio = schib.pmcw.qf;
return 0;
}
/**
* cio_tm_start_key - perform start function
* @sch: subchannel on which to perform the start function