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Diffstat (limited to 'arch/s390/kernel/early.c')
-rw-r--r--arch/s390/kernel/early.c109
1 files changed, 54 insertions, 55 deletions
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index 52098d6dfaa..0dff972a169 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -1,6 +1,4 @@
/*
- * arch/s390/kernel/early.c
- *
* Copyright IBM Corp. 2007, 2009
* Author(s): Hongjie Yang <hongjie@us.ibm.com>,
* Heiko Carstens <heiko.carstens@de.ibm.com>
@@ -29,6 +27,7 @@
#include <asm/sysinfo.h>
#include <asm/cpcmd.h>
#include <asm/sclp.h>
+#include <asm/facility.h>
#include "entry.h"
/*
@@ -48,10 +47,10 @@ static void __init reset_tod_clock(void)
{
u64 time;
- if (store_clock(&time) == 0)
+ if (store_tod_clock(&time) == 0)
return;
/* TOD clock not running. Set the clock to Unix Epoch. */
- if (set_clock(TOD_UNIX_EPOCH) != 0 || store_clock(&time) != 0)
+ if (set_tod_clock(TOD_UNIX_EPOCH) != 0 || store_tod_clock(&time) != 0)
disabled_wait(0);
sched_clock_base_cc = TOD_UNIX_EPOCH;
@@ -174,7 +173,7 @@ static noinline __init void create_kernel_nss(void)
}
/* re-initialize cputime accounting. */
- sched_clock_base_cc = get_clock();
+ 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;
@@ -207,6 +206,7 @@ static noinline __init void clear_bss_section(void)
*/
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));
@@ -214,38 +214,63 @@ static noinline __init void init_kernel_storage_key(void)
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 struct sysinfo_3_2_2 vmms __aligned(PAGE_SIZE);
+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) >> 28) <= 2) {
+ 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) == -ENOSYS || !vmms.count)
+ 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))
+ 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 early_pgm_check_handler(void)
+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)
{
- unsigned long addr;
const struct exception_table_entry *fixup;
+ unsigned long cr0, cr0_new;
+ 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 = fixup->fixup | PSW_ADDR_AMODE;
+ /* Disable low address protection before storing into lowcore. */
+ __ctl_store(cr0, 0, 0);
+ cr0_new = cr0 & ~(1UL << 28);
+ __ctl_load(cr0_new, 0, 0);
+ S390_lowcore.program_old_psw.addr = extable_fixup(fixup)|PSW_ADDR_AMODE;
+ __ctl_load(cr0, 0, 0);
}
static noinline __init void setup_lowcore_early(void)
@@ -262,35 +287,8 @@ static noinline __init void setup_lowcore_early(void)
static noinline __init void setup_facility_list(void)
{
- unsigned long nr;
-
- S390_lowcore.stfl_fac_list = 0;
- asm volatile(
- " .insn s,0xb2b10000,0(0)\n" /* stfl */
- "0:\n"
- EX_TABLE(0b,0b) : "=m" (S390_lowcore.stfl_fac_list));
- memcpy(&S390_lowcore.stfle_fac_list, &S390_lowcore.stfl_fac_list, 4);
- nr = 4; /* # bytes stored by stfl */
- if (test_facility(7)) {
- /* More facility bits available with stfle */
- register unsigned long reg0 asm("0") = MAX_FACILITY_BIT/64 - 1;
- asm volatile(".insn s,0xb2b00000,%0" /* stfle */
- : "=m" (S390_lowcore.stfle_fac_list), "+d" (reg0)
- : : "cc");
- nr = (reg0 + 1) * 8; /* # bytes stored by stfle */
- }
- memset((char *) S390_lowcore.stfle_fac_list + nr, 0,
- MAX_FACILITY_BIT/8 - nr);
-}
-
-static noinline __init void setup_hpage(void)
-{
-#ifndef CONFIG_DEBUG_PAGEALLOC
- if (!test_facility(2) || !test_facility(8))
- return;
- S390_lowcore.machine_flags |= MACHINE_FLAG_HPAGE;
- __ctl_set_bit(0, 23);
-#endif
+ stfle(S390_lowcore.stfle_fac_list,
+ ARRAY_SIZE(S390_lowcore.stfle_fac_list));
}
static __init void detect_mvpg(void)
@@ -380,18 +378,22 @@ static __init void detect_diag44(void)
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(8))
- S390_lowcore.machine_flags |= MACHINE_FLAG_PFMF;
- if (test_facility(11))
- S390_lowcore.machine_flags |= MACHINE_FLAG_TOPOLOGY;
- if (test_facility(27))
- S390_lowcore.machine_flags |= MACHINE_FLAG_MVCOS;
if (test_facility(40))
- S390_lowcore.machine_flags |= MACHINE_FLAG_SPP;
- if (test_facility(25))
- S390_lowcore.machine_flags |= MACHINE_FLAG_STCKF;
+ 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;
+ if (test_facility(51))
+ S390_lowcore.machine_flags |= MACHINE_FLAG_TLB_LC;
#endif
}
@@ -461,7 +463,6 @@ static void __init setup_boot_command_line(void)
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
@@ -475,7 +476,6 @@ void __init startup_init(void)
init_kernel_storage_key();
lockdep_init();
lockdep_off();
- sort_main_extable();
setup_lowcore_early();
setup_facility_list();
detect_machine_type();
@@ -488,9 +488,8 @@ void __init startup_init(void)
detect_diag9c();
detect_diag44();
detect_machine_facilities();
- setup_hpage();
- sclp_facilities_detect();
- detect_memory_layout(memory_chunk);
+ setup_topology();
+ sclp_early_detect();
#ifdef CONFIG_DYNAMIC_FTRACE
S390_lowcore.ftrace_func = (unsigned long)ftrace_caller;
#endif
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 10:13:55 +0000