![Michael Holzheu](/assets/img/avatar_default.png)
The new function calls the old ones. The sclp_event_mask_early() is removed and replaced by one invocation of sclp_set_event_mask(0, 0). Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
492 lines
12 KiB
C
492 lines
12 KiB
C
/*
|
|
* Copyright IBM Corp. 2007, 2009
|
|
* Author(s): Hongjie Yang <hongjie@us.ibm.com>,
|
|
* Heiko Carstens <heiko.carstens@de.ibm.com>
|
|
*/
|
|
|
|
#define KMSG_COMPONENT "setup"
|
|
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
|
|
|
|
#include <linux/compiler.h>
|
|
#include <linux/init.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/string.h>
|
|
#include <linux/ctype.h>
|
|
#include <linux/ftrace.h>
|
|
#include <linux/lockdep.h>
|
|
#include <linux/module.h>
|
|
#include <linux/pfn.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/kernel.h>
|
|
#include <asm/ebcdic.h>
|
|
#include <asm/ipl.h>
|
|
#include <asm/lowcore.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/sections.h>
|
|
#include <asm/setup.h>
|
|
#include <asm/sysinfo.h>
|
|
#include <asm/cpcmd.h>
|
|
#include <asm/sclp.h>
|
|
#include <asm/facility.h>
|
|
#include "entry.h"
|
|
|
|
/*
|
|
* Create a Kernel NSS if the SAVESYS= parameter is defined
|
|
*/
|
|
#define DEFSYS_CMD_SIZE 128
|
|
#define SAVESYS_CMD_SIZE 32
|
|
|
|
char kernel_nss_name[NSS_NAME_SIZE + 1];
|
|
|
|
static void __init setup_boot_command_line(void);
|
|
|
|
/*
|
|
* Get the TOD clock running.
|
|
*/
|
|
static void __init reset_tod_clock(void)
|
|
{
|
|
u64 time;
|
|
|
|
if (store_tod_clock(&time) == 0)
|
|
return;
|
|
/* TOD clock not running. Set the clock to Unix Epoch. */
|
|
if (set_tod_clock(TOD_UNIX_EPOCH) != 0 || store_tod_clock(&time) != 0)
|
|
disabled_wait(0);
|
|
|
|
sched_clock_base_cc = TOD_UNIX_EPOCH;
|
|
S390_lowcore.last_update_clock = sched_clock_base_cc;
|
|
}
|
|
|
|
#ifdef CONFIG_SHARED_KERNEL
|
|
int __init savesys_ipl_nss(char *cmd, const int cmdlen);
|
|
|
|
asm(
|
|
" .section .init.text,\"ax\",@progbits\n"
|
|
" .align 4\n"
|
|
" .type savesys_ipl_nss, @function\n"
|
|
"savesys_ipl_nss:\n"
|
|
#ifdef CONFIG_64BIT
|
|
" stmg 6,15,48(15)\n"
|
|
" lgr 14,3\n"
|
|
" sam31\n"
|
|
" diag 2,14,0x8\n"
|
|
" sam64\n"
|
|
" lgr 2,14\n"
|
|
" lmg 6,15,48(15)\n"
|
|
#else
|
|
" stm 6,15,24(15)\n"
|
|
" lr 14,3\n"
|
|
" diag 2,14,0x8\n"
|
|
" lr 2,14\n"
|
|
" lm 6,15,24(15)\n"
|
|
#endif
|
|
" br 14\n"
|
|
" .size savesys_ipl_nss, .-savesys_ipl_nss\n"
|
|
" .previous\n");
|
|
|
|
static __initdata char upper_command_line[COMMAND_LINE_SIZE];
|
|
|
|
static noinline __init void create_kernel_nss(void)
|
|
{
|
|
unsigned int i, stext_pfn, eshared_pfn, end_pfn, min_size;
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
unsigned int sinitrd_pfn, einitrd_pfn;
|
|
#endif
|
|
int response;
|
|
int hlen;
|
|
size_t len;
|
|
char *savesys_ptr;
|
|
char defsys_cmd[DEFSYS_CMD_SIZE];
|
|
char savesys_cmd[SAVESYS_CMD_SIZE];
|
|
|
|
/* Do nothing if we are not running under VM */
|
|
if (!MACHINE_IS_VM)
|
|
return;
|
|
|
|
/* Convert COMMAND_LINE to upper case */
|
|
for (i = 0; i < strlen(boot_command_line); i++)
|
|
upper_command_line[i] = toupper(boot_command_line[i]);
|
|
|
|
savesys_ptr = strstr(upper_command_line, "SAVESYS=");
|
|
|
|
if (!savesys_ptr)
|
|
return;
|
|
|
|
savesys_ptr += 8; /* Point to the beginning of the NSS name */
|
|
for (i = 0; i < NSS_NAME_SIZE; i++) {
|
|
if (savesys_ptr[i] == ' ' || savesys_ptr[i] == '\0')
|
|
break;
|
|
kernel_nss_name[i] = savesys_ptr[i];
|
|
}
|
|
|
|
stext_pfn = PFN_DOWN(__pa(&_stext));
|
|
eshared_pfn = PFN_DOWN(__pa(&_eshared));
|
|
end_pfn = PFN_UP(__pa(&_end));
|
|
min_size = end_pfn << 2;
|
|
|
|
hlen = snprintf(defsys_cmd, DEFSYS_CMD_SIZE,
|
|
"DEFSYS %s 00000-%.5X EW %.5X-%.5X SR %.5X-%.5X",
|
|
kernel_nss_name, stext_pfn - 1, stext_pfn,
|
|
eshared_pfn - 1, eshared_pfn, end_pfn);
|
|
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
if (INITRD_START && INITRD_SIZE) {
|
|
sinitrd_pfn = PFN_DOWN(__pa(INITRD_START));
|
|
einitrd_pfn = PFN_UP(__pa(INITRD_START + INITRD_SIZE));
|
|
min_size = einitrd_pfn << 2;
|
|
hlen += snprintf(defsys_cmd + hlen, DEFSYS_CMD_SIZE - hlen,
|
|
" EW %.5X-%.5X", sinitrd_pfn, einitrd_pfn);
|
|
}
|
|
#endif
|
|
|
|
snprintf(defsys_cmd + hlen, DEFSYS_CMD_SIZE - hlen,
|
|
" EW MINSIZE=%.7iK PARMREGS=0-13", min_size);
|
|
defsys_cmd[DEFSYS_CMD_SIZE - 1] = '\0';
|
|
snprintf(savesys_cmd, SAVESYS_CMD_SIZE, "SAVESYS %s \n IPL %s",
|
|
kernel_nss_name, kernel_nss_name);
|
|
savesys_cmd[SAVESYS_CMD_SIZE - 1] = '\0';
|
|
|
|
__cpcmd(defsys_cmd, NULL, 0, &response);
|
|
|
|
if (response != 0) {
|
|
pr_err("Defining the Linux kernel NSS failed with rc=%d\n",
|
|
response);
|
|
kernel_nss_name[0] = '\0';
|
|
return;
|
|
}
|
|
|
|
len = strlen(savesys_cmd);
|
|
ASCEBC(savesys_cmd, len);
|
|
response = savesys_ipl_nss(savesys_cmd, len);
|
|
|
|
/* On success: response is equal to the command size,
|
|
* max SAVESYS_CMD_SIZE
|
|
* On error: response contains the numeric portion of cp error message.
|
|
* for SAVESYS it will be >= 263
|
|
* for missing privilege class, it will be 1
|
|
*/
|
|
if (response > SAVESYS_CMD_SIZE || response == 1) {
|
|
pr_err("Saving the Linux kernel NSS failed with rc=%d\n",
|
|
response);
|
|
kernel_nss_name[0] = '\0';
|
|
return;
|
|
}
|
|
|
|
/* re-initialize cputime accounting. */
|
|
sched_clock_base_cc = get_tod_clock();
|
|
S390_lowcore.last_update_clock = sched_clock_base_cc;
|
|
S390_lowcore.last_update_timer = 0x7fffffffffffffffULL;
|
|
S390_lowcore.user_timer = 0;
|
|
S390_lowcore.system_timer = 0;
|
|
asm volatile("SPT 0(%0)" : : "a" (&S390_lowcore.last_update_timer));
|
|
|
|
/* re-setup boot command line with new ipl vm parms */
|
|
ipl_update_parameters();
|
|
setup_boot_command_line();
|
|
|
|
ipl_flags = IPL_NSS_VALID;
|
|
}
|
|
|
|
#else /* CONFIG_SHARED_KERNEL */
|
|
|
|
static inline void create_kernel_nss(void) { }
|
|
|
|
#endif /* CONFIG_SHARED_KERNEL */
|
|
|
|
/*
|
|
* Clear bss memory
|
|
*/
|
|
static noinline __init void clear_bss_section(void)
|
|
{
|
|
memset(__bss_start, 0, __bss_stop - __bss_start);
|
|
}
|
|
|
|
/*
|
|
* Initialize storage key for kernel pages
|
|
*/
|
|
static noinline __init void init_kernel_storage_key(void)
|
|
{
|
|
#if PAGE_DEFAULT_KEY
|
|
unsigned long end_pfn, init_pfn;
|
|
|
|
end_pfn = PFN_UP(__pa(&_end));
|
|
|
|
for (init_pfn = 0 ; init_pfn < end_pfn; init_pfn++)
|
|
page_set_storage_key(init_pfn << PAGE_SHIFT,
|
|
PAGE_DEFAULT_KEY, 0);
|
|
#endif
|
|
}
|
|
|
|
static __initdata char sysinfo_page[PAGE_SIZE] __aligned(PAGE_SIZE);
|
|
|
|
static noinline __init void detect_machine_type(void)
|
|
{
|
|
struct sysinfo_3_2_2 *vmms = (struct sysinfo_3_2_2 *)&sysinfo_page;
|
|
|
|
/* Check current-configuration-level */
|
|
if (stsi(NULL, 0, 0, 0) <= 2) {
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_LPAR;
|
|
return;
|
|
}
|
|
/* Get virtual-machine cpu information. */
|
|
if (stsi(vmms, 3, 2, 2) || !vmms->count)
|
|
return;
|
|
|
|
/* Running under KVM? If not we assume z/VM */
|
|
if (!memcmp(vmms->vm[0].cpi, "\xd2\xe5\xd4", 3))
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_KVM;
|
|
else
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_VM;
|
|
}
|
|
|
|
static __init void setup_topology(void)
|
|
{
|
|
#ifdef CONFIG_64BIT
|
|
int max_mnest;
|
|
|
|
if (!test_facility(11))
|
|
return;
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_TOPOLOGY;
|
|
for (max_mnest = 6; max_mnest > 1; max_mnest--) {
|
|
if (stsi(&sysinfo_page, 15, 1, max_mnest) == 0)
|
|
break;
|
|
}
|
|
topology_max_mnest = max_mnest;
|
|
#endif
|
|
}
|
|
|
|
static void early_pgm_check_handler(void)
|
|
{
|
|
const struct exception_table_entry *fixup;
|
|
unsigned long addr;
|
|
|
|
addr = S390_lowcore.program_old_psw.addr;
|
|
fixup = search_exception_tables(addr & PSW_ADDR_INSN);
|
|
if (!fixup)
|
|
disabled_wait(0);
|
|
S390_lowcore.program_old_psw.addr = extable_fixup(fixup)|PSW_ADDR_AMODE;
|
|
}
|
|
|
|
static noinline __init void setup_lowcore_early(void)
|
|
{
|
|
psw_t psw;
|
|
|
|
psw.mask = PSW_MASK_BASE | PSW_DEFAULT_KEY | PSW_MASK_EA | PSW_MASK_BA;
|
|
psw.addr = PSW_ADDR_AMODE | (unsigned long) s390_base_ext_handler;
|
|
S390_lowcore.external_new_psw = psw;
|
|
psw.addr = PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
|
|
S390_lowcore.program_new_psw = psw;
|
|
s390_base_pgm_handler_fn = early_pgm_check_handler;
|
|
}
|
|
|
|
static noinline __init void setup_facility_list(void)
|
|
{
|
|
stfle(S390_lowcore.stfle_fac_list,
|
|
ARRAY_SIZE(S390_lowcore.stfle_fac_list));
|
|
}
|
|
|
|
static __init void detect_mvpg(void)
|
|
{
|
|
#ifndef CONFIG_64BIT
|
|
int rc;
|
|
|
|
asm volatile(
|
|
" la 0,0\n"
|
|
" mvpg %2,%2\n"
|
|
"0: la %0,0\n"
|
|
"1:\n"
|
|
EX_TABLE(0b,1b)
|
|
: "=d" (rc) : "0" (-EOPNOTSUPP), "a" (0) : "memory", "cc", "0");
|
|
if (!rc)
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_MVPG;
|
|
#endif
|
|
}
|
|
|
|
static __init void detect_ieee(void)
|
|
{
|
|
#ifndef CONFIG_64BIT
|
|
int rc, tmp;
|
|
|
|
asm volatile(
|
|
" efpc %1,0\n"
|
|
"0: la %0,0\n"
|
|
"1:\n"
|
|
EX_TABLE(0b,1b)
|
|
: "=d" (rc), "=d" (tmp): "0" (-EOPNOTSUPP) : "cc");
|
|
if (!rc)
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_IEEE;
|
|
#endif
|
|
}
|
|
|
|
static __init void detect_csp(void)
|
|
{
|
|
#ifndef CONFIG_64BIT
|
|
int rc;
|
|
|
|
asm volatile(
|
|
" la 0,0\n"
|
|
" la 1,0\n"
|
|
" la 2,4\n"
|
|
" csp 0,2\n"
|
|
"0: la %0,0\n"
|
|
"1:\n"
|
|
EX_TABLE(0b,1b)
|
|
: "=d" (rc) : "0" (-EOPNOTSUPP) : "cc", "0", "1", "2");
|
|
if (!rc)
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_CSP;
|
|
#endif
|
|
}
|
|
|
|
static __init void detect_diag9c(void)
|
|
{
|
|
unsigned int cpu_address;
|
|
int rc;
|
|
|
|
cpu_address = stap();
|
|
asm volatile(
|
|
" diag %2,0,0x9c\n"
|
|
"0: la %0,0\n"
|
|
"1:\n"
|
|
EX_TABLE(0b,1b)
|
|
: "=d" (rc) : "0" (-EOPNOTSUPP), "d" (cpu_address) : "cc");
|
|
if (!rc)
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_DIAG9C;
|
|
}
|
|
|
|
static __init void detect_diag44(void)
|
|
{
|
|
#ifdef CONFIG_64BIT
|
|
int rc;
|
|
|
|
asm volatile(
|
|
" diag 0,0,0x44\n"
|
|
"0: la %0,0\n"
|
|
"1:\n"
|
|
EX_TABLE(0b,1b)
|
|
: "=d" (rc) : "0" (-EOPNOTSUPP) : "cc");
|
|
if (!rc)
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_DIAG44;
|
|
#endif
|
|
}
|
|
|
|
static __init void detect_machine_facilities(void)
|
|
{
|
|
#ifdef CONFIG_64BIT
|
|
if (test_facility(8)) {
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_EDAT1;
|
|
__ctl_set_bit(0, 23);
|
|
}
|
|
if (test_facility(78))
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_EDAT2;
|
|
if (test_facility(3))
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_IDTE;
|
|
if (test_facility(27))
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_MVCOS;
|
|
if (test_facility(40))
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_LPP;
|
|
if (test_facility(50) && test_facility(73))
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_TE;
|
|
if (test_facility(66))
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_RRBM;
|
|
#endif
|
|
}
|
|
|
|
static __init void rescue_initrd(void)
|
|
{
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
unsigned long min_initrd_addr = (unsigned long) _end + (4UL << 20);
|
|
/*
|
|
* Just like in case of IPL from VM reader we make sure there is a
|
|
* gap of 4MB between end of kernel and start of initrd.
|
|
* That way we can also be sure that saving an NSS will succeed,
|
|
* which however only requires different segments.
|
|
*/
|
|
if (!INITRD_START || !INITRD_SIZE)
|
|
return;
|
|
if (INITRD_START >= min_initrd_addr)
|
|
return;
|
|
memmove((void *) min_initrd_addr, (void *) INITRD_START, INITRD_SIZE);
|
|
INITRD_START = min_initrd_addr;
|
|
#endif
|
|
}
|
|
|
|
/* Set up boot command line */
|
|
static void __init append_to_cmdline(size_t (*ipl_data)(char *, size_t))
|
|
{
|
|
char *parm, *delim;
|
|
size_t rc, len;
|
|
|
|
len = strlen(boot_command_line);
|
|
|
|
delim = boot_command_line + len; /* '\0' character position */
|
|
parm = boot_command_line + len + 1; /* append right after '\0' */
|
|
|
|
rc = ipl_data(parm, COMMAND_LINE_SIZE - len - 1);
|
|
if (rc) {
|
|
if (*parm == '=')
|
|
memmove(boot_command_line, parm + 1, rc);
|
|
else
|
|
*delim = ' '; /* replace '\0' with space */
|
|
}
|
|
}
|
|
|
|
static inline int has_ebcdic_char(const char *str)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; str[i]; i++)
|
|
if (str[i] & 0x80)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static void __init setup_boot_command_line(void)
|
|
{
|
|
COMMAND_LINE[ARCH_COMMAND_LINE_SIZE - 1] = 0;
|
|
/* convert arch command line to ascii if necessary */
|
|
if (has_ebcdic_char(COMMAND_LINE))
|
|
EBCASC(COMMAND_LINE, ARCH_COMMAND_LINE_SIZE);
|
|
/* copy arch command line */
|
|
strlcpy(boot_command_line, strstrip(COMMAND_LINE),
|
|
ARCH_COMMAND_LINE_SIZE);
|
|
|
|
/* append IPL PARM data to the boot command line */
|
|
if (MACHINE_IS_VM)
|
|
append_to_cmdline(append_ipl_vmparm);
|
|
|
|
append_to_cmdline(append_ipl_scpdata);
|
|
}
|
|
|
|
/*
|
|
* Save ipl parameters, clear bss memory, initialize storage keys
|
|
* and create a kernel NSS at startup if the SAVESYS= parm is defined
|
|
*/
|
|
void __init startup_init(void)
|
|
{
|
|
reset_tod_clock();
|
|
ipl_save_parameters();
|
|
rescue_initrd();
|
|
clear_bss_section();
|
|
init_kernel_storage_key();
|
|
lockdep_init();
|
|
lockdep_off();
|
|
setup_lowcore_early();
|
|
setup_facility_list();
|
|
detect_machine_type();
|
|
ipl_update_parameters();
|
|
setup_boot_command_line();
|
|
create_kernel_nss();
|
|
detect_mvpg();
|
|
detect_ieee();
|
|
detect_csp();
|
|
detect_diag9c();
|
|
detect_diag44();
|
|
detect_machine_facilities();
|
|
setup_topology();
|
|
sclp_early_detect();
|
|
#ifdef CONFIG_DYNAMIC_FTRACE
|
|
S390_lowcore.ftrace_func = (unsigned long)ftrace_caller;
|
|
#endif
|
|
lockdep_on();
|
|
}
|