diff options
Diffstat (limited to 'arch/s390/kernel')
| -rw-r--r-- | arch/s390/kernel/early.c | 16 | ||||
| -rw-r--r-- | arch/s390/kernel/head64.S | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/setup.c | 10 |
3 files changed, 24 insertions, 4 deletions
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index bd188f6bd0e..d0e09684b9c 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -268,6 +268,19 @@ static noinline __init void setup_lowcore_early(void) s390_base_pgm_handler_fn = early_pgm_check_handler; } +static noinline __init void setup_hpage(void) +{ +#ifndef CONFIG_DEBUG_PAGEALLOC + unsigned int facilities; + + facilities = stfl(); + if (!(facilities & (1UL << 23)) || !(facilities & (1UL << 29))) + return; + machine_flags |= MACHINE_FLAG_HPAGE; + __ctl_set_bit(0, 23); +#endif +} + static __init void detect_mvpg(void) { #ifndef CONFIG_64BIT @@ -360,6 +373,8 @@ static __init void detect_machine_facilities(void) facilities = stfl(); if (facilities & (1 << 28)) machine_flags |= MACHINE_FLAG_IDTE; + if (facilities & (1 << 23)) + machine_flags |= MACHINE_FLAG_PFMF; if (facilities & (1 << 4)) machine_flags |= MACHINE_FLAG_MVCOS; #endif @@ -388,6 +403,7 @@ void __init startup_init(void) detect_diag9c(); detect_diag44(); detect_machine_facilities(); + setup_hpage(); sclp_read_info_early(); sclp_facilities_detect(); memsize = sclp_memory_detect(); diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S index 9c2c6f7d37e..1d06961e87b 100644 --- a/arch/s390/kernel/head64.S +++ b/arch/s390/kernel/head64.S @@ -129,7 +129,7 @@ startup_continue: # virtual and never return ... .align 16 .Lentry:.quad 0x0000000180000000,_stext -.Lctl: .quad 0x04b50002 # cr0: various things +.Lctl: .quad 0x04350002 # cr0: various things .quad 0 # cr1: primary space segment table .quad .Lduct # cr2: dispatchable unit control table .quad 0 # cr3: instruction authorization diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 694c6546ce6..2bc70b6e876 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -749,6 +749,9 @@ static void __init setup_hwcaps(void) elf_hwcap |= 1UL << 6; } + if (MACHINE_HAS_HPAGE) + elf_hwcap |= 1UL << 7; + switch (cpuinfo->cpu_id.machine) { case 0x9672: #if !defined(CONFIG_64BIT) @@ -872,8 +875,9 @@ void __cpuinit print_cpu_info(struct cpuinfo_S390 *cpuinfo) static int show_cpuinfo(struct seq_file *m, void *v) { - static const char *hwcap_str[7] = { - "esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp" + static const char *hwcap_str[8] = { + "esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp", + "edat" }; struct cpuinfo_S390 *cpuinfo; unsigned long n = (unsigned long) v - 1; @@ -888,7 +892,7 @@ static int show_cpuinfo(struct seq_file *m, void *v) num_online_cpus(), loops_per_jiffy/(500000/HZ), (loops_per_jiffy/(5000/HZ))%100); seq_puts(m, "features\t: "); - for (i = 0; i < 7; i++) + for (i = 0; i < 8; i++) if (hwcap_str[i] && (elf_hwcap & (1UL << i))) seq_printf(m, "%s ", hwcap_str[i]); seq_puts(m, "\n"); |