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Diffstat (limited to 'arch/s390/kernel/early.c')
-rw-r--r--arch/s390/kernel/early.c85
1 files changed, 54 insertions, 31 deletions
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index 2345ea332b97..2fa25164df7d 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -7,6 +7,7 @@
#define KMSG_COMPONENT "setup"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#include <linux/sched/debug.h>
#include <linux/compiler.h>
#include <linux/init.h>
#include <linux/errno.h>
@@ -19,8 +20,10 @@
#include <linux/kernel.h>
#include <asm/asm-extable.h>
#include <linux/memblock.h>
+#include <asm/access-regs.h>
#include <asm/diag.h>
#include <asm/ebcdic.h>
+#include <asm/fpu.h>
#include <asm/ipl.h>
#include <asm/lowcore.h>
#include <asm/processor.h>
@@ -31,7 +34,6 @@
#include <asm/sclp.h>
#include <asm/facility.h>
#include <asm/boot_data.h>
-#include <asm/switch_to.h>
#include "entry.h"
#define decompressor_handled_param(param) \
@@ -47,6 +49,8 @@ decompressor_handled_param(dfltcc);
decompressor_handled_param(facilities);
decompressor_handled_param(nokaslr);
decompressor_handled_param(cmma);
+decompressor_handled_param(relocate_lowcore);
+decompressor_handled_param(bootdebug);
#if IS_ENABLED(CONFIG_KVM)
decompressor_handled_param(prot_virt);
#endif
@@ -55,7 +59,7 @@ static void __init kasan_early_init(void)
{
#ifdef CONFIG_KASAN
init_task.kasan_depth = 0;
- sclp_early_printk("KernelAddressSanitizer initialized\n");
+ pr_info("KernelAddressSanitizer initialized\n");
#endif
}
@@ -71,7 +75,7 @@ static void __init reset_tod_clock(void)
memset(&tod_clock_base, 0, sizeof(tod_clock_base));
tod_clock_base.tod = TOD_UNIX_EPOCH;
- S390_lowcore.last_update_clock = TOD_UNIX_EPOCH;
+ get_lowcore()->last_update_clock = TOD_UNIX_EPOCH;
}
/*
@@ -98,7 +102,7 @@ static noinline __init void detect_machine_type(void)
/* Check current-configuration-level */
if (stsi(NULL, 0, 0, 0) <= 2) {
- S390_lowcore.machine_flags |= MACHINE_FLAG_LPAR;
+ get_lowcore()->machine_flags |= MACHINE_FLAG_LPAR;
return;
}
/* Get virtual-machine cpu information. */
@@ -107,9 +111,9 @@ static noinline __init void detect_machine_type(void)
/* Detect known hypervisors */
if (!memcmp(vmms->vm[0].cpi, "\xd2\xe5\xd4", 3))
- S390_lowcore.machine_flags |= MACHINE_FLAG_KVM;
+ get_lowcore()->machine_flags |= MACHINE_FLAG_KVM;
else if (!memcmp(vmms->vm[0].cpi, "\xa9\x61\xe5\xd4", 4))
- S390_lowcore.machine_flags |= MACHINE_FLAG_VM;
+ get_lowcore()->machine_flags |= MACHINE_FLAG_VM;
}
/* Remove leading, trailing and double whitespace. */
@@ -165,7 +169,7 @@ static __init void setup_topology(void)
if (!test_facility(11))
return;
- S390_lowcore.machine_flags |= MACHINE_FLAG_TOPOLOGY;
+ get_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;
@@ -173,27 +177,45 @@ static __init void setup_topology(void)
topology_max_mnest = max_mnest;
}
-void __do_early_pgm_check(struct pt_regs *regs)
+void __init __do_early_pgm_check(struct pt_regs *regs)
{
- if (!fixup_exception(regs))
- disabled_wait();
+ struct lowcore *lc = get_lowcore();
+ unsigned long ip;
+
+ regs->int_code = lc->pgm_int_code;
+ regs->int_parm_long = lc->trans_exc_code;
+ ip = __rewind_psw(regs->psw, regs->int_code >> 16);
+
+ /* Monitor Event? Might be a warning */
+ if ((regs->int_code & PGM_INT_CODE_MASK) == 0x40) {
+ if (report_bug(ip, regs) == BUG_TRAP_TYPE_WARN)
+ return;
+ }
+ if (fixup_exception(regs))
+ return;
+ /*
+ * Unhandled exception - system cannot continue but try to get some
+ * helpful messages to the console. Use early_printk() to print
+ * some basic information in case it is too early for printk().
+ */
+ register_early_console();
+ early_printk("PANIC: early exception %04x PSW: %016lx %016lx\n",
+ regs->int_code & 0xffff, regs->psw.mask, regs->psw.addr);
+ show_regs(regs);
+ disabled_wait();
}
static noinline __init void setup_lowcore_early(void)
{
+ struct lowcore *lc = get_lowcore();
psw_t psw;
psw.addr = (unsigned long)early_pgm_check_handler;
psw.mask = PSW_KERNEL_BITS;
- S390_lowcore.program_new_psw = psw;
- S390_lowcore.preempt_count = INIT_PREEMPT_COUNT;
-}
-
-static noinline __init void setup_facility_list(void)
-{
- memcpy(alt_stfle_fac_list, stfle_fac_list, sizeof(alt_stfle_fac_list));
- if (!IS_ENABLED(CONFIG_KERNEL_NOBP))
- __clear_facility(82, alt_stfle_fac_list);
+ lc->program_new_psw = psw;
+ lc->preempt_count = INIT_PREEMPT_COUNT;
+ lc->return_lpswe = gen_lpswe(__LC_RETURN_PSW);
+ lc->return_mcck_lpswe = gen_lpswe(__LC_RETURN_MCCK_PSW);
}
static __init void detect_diag9c(void)
@@ -210,43 +232,45 @@ static __init void detect_diag9c(void)
EX_TABLE(0b,1b)
: "=d" (rc) : "0" (-EOPNOTSUPP), "d" (cpu_address) : "cc");
if (!rc)
- S390_lowcore.machine_flags |= MACHINE_FLAG_DIAG9C;
+ get_lowcore()->machine_flags |= MACHINE_FLAG_DIAG9C;
}
static __init void detect_machine_facilities(void)
{
if (test_facility(8)) {
- S390_lowcore.machine_flags |= MACHINE_FLAG_EDAT1;
+ get_lowcore()->machine_flags |= MACHINE_FLAG_EDAT1;
system_ctl_set_bit(0, CR0_EDAT_BIT);
}
if (test_facility(78))
- S390_lowcore.machine_flags |= MACHINE_FLAG_EDAT2;
+ get_lowcore()->machine_flags |= MACHINE_FLAG_EDAT2;
if (test_facility(3))
- S390_lowcore.machine_flags |= MACHINE_FLAG_IDTE;
+ get_lowcore()->machine_flags |= MACHINE_FLAG_IDTE;
if (test_facility(50) && test_facility(73)) {
- S390_lowcore.machine_flags |= MACHINE_FLAG_TE;
+ get_lowcore()->machine_flags |= MACHINE_FLAG_TE;
system_ctl_set_bit(0, CR0_TRANSACTIONAL_EXECUTION_BIT);
}
if (test_facility(51))
- S390_lowcore.machine_flags |= MACHINE_FLAG_TLB_LC;
+ get_lowcore()->machine_flags |= MACHINE_FLAG_TLB_LC;
if (test_facility(129))
system_ctl_set_bit(0, CR0_VECTOR_BIT);
if (test_facility(130))
- S390_lowcore.machine_flags |= MACHINE_FLAG_NX;
+ get_lowcore()->machine_flags |= MACHINE_FLAG_NX;
if (test_facility(133))
- S390_lowcore.machine_flags |= MACHINE_FLAG_GS;
+ get_lowcore()->machine_flags |= MACHINE_FLAG_GS;
if (test_facility(139) && (tod_clock_base.tod >> 63)) {
/* Enabled signed clock comparator comparisons */
- S390_lowcore.machine_flags |= MACHINE_FLAG_SCC;
+ get_lowcore()->machine_flags |= MACHINE_FLAG_SCC;
clock_comparator_max = -1ULL >> 1;
system_ctl_set_bit(0, CR0_CLOCK_COMPARATOR_SIGN_BIT);
}
if (IS_ENABLED(CONFIG_PCI) && test_facility(153)) {
- S390_lowcore.machine_flags |= MACHINE_FLAG_PCI_MIO;
+ get_lowcore()->machine_flags |= MACHINE_FLAG_PCI_MIO;
/* the control bit is set during PCI initialization */
}
if (test_facility(194))
- S390_lowcore.machine_flags |= MACHINE_FLAG_RDP;
+ get_lowcore()->machine_flags |= MACHINE_FLAG_RDP;
+ if (test_facility(85))
+ get_lowcore()->machine_flags |= MACHINE_FLAG_SEQ_INSN;
}
static inline void save_vector_registers(void)
@@ -290,7 +314,6 @@ void __init startup_init(void)
lockdep_off();
sort_amode31_extable();
setup_lowcore_early();
- setup_facility_list();
detect_machine_type();
setup_arch_string();
setup_boot_command_line();
generated by cgit (git 2.34.1) at 2025-07-23 09:09:48 +0000