diff options
| -rw-r--r-- | arch/s390/include/asm/sysinfo.h | 1 | ||||
| -rw-r--r-- | arch/s390/kernel/early.c | 22 | ||||
| -rw-r--r-- | arch/s390/kernel/vmlinux.lds.S | 2 | ||||
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 2 |
4 files changed, 17 insertions, 10 deletions
diff --git a/arch/s390/include/asm/sysinfo.h b/arch/s390/include/asm/sysinfo.h index ad93212d9e1..9d70057d828 100644 --- a/arch/s390/include/asm/sysinfo.h +++ b/arch/s390/include/asm/sysinfo.h @@ -100,6 +100,7 @@ struct sysinfo_3_2_2 { char reserved_1[24]; } vm[8]; + char reserved_544[3552]; }; static inline int stsi(void *sysinfo, int fc, int sel1, int sel2) diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index 2a2ca268b1d..d61eb3334ed 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -6,6 +6,7 @@ * Heiko Carstens <heiko.carstens@de.ibm.com> */ +#include <linux/compiler.h> #include <linux/init.h> #include <linux/errno.h> #include <linux/string.h> @@ -20,6 +21,7 @@ #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 "entry.h" @@ -173,19 +175,21 @@ static noinline __init void init_kernel_storage_key(void) page_set_storage_key(init_pfn << PAGE_SHIFT, PAGE_DEFAULT_KEY); } +static __initdata struct sysinfo_3_2_2 vmms __aligned(PAGE_SIZE); + static noinline __init void detect_machine_type(void) { - struct cpuinfo_S390 *cpuinfo = &S390_lowcore.cpu_data; - - get_cpu_id(&S390_lowcore.cpu_data.cpu_id); - - /* Running under z/VM ? */ - if (cpuinfo->cpu_id.version == 0xff) - machine_flags |= MACHINE_FLAG_VM; + /* No VM information? Looks like LPAR */ + if (stsi(&vmms, 3, 2, 2) == -ENOSYS) + return; + if (!vmms.count) + return; - /* Running under KVM ? */ - if (cpuinfo->cpu_id.version == 0xfe) + /* Running under KVM? If not we assume z/VM */ + if (!memcmp(vmms.vm[0].cpi, "\xd2\xe5\xd4", 3)) machine_flags |= MACHINE_FLAG_KVM; + else + machine_flags |= MACHINE_FLAG_VM; } static __init void early_pgm_check_handler(void) diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S index d796d05c9c0..7a2063eb88f 100644 --- a/arch/s390/kernel/vmlinux.lds.S +++ b/arch/s390/kernel/vmlinux.lds.S @@ -108,6 +108,8 @@ SECTIONS EXIT_TEXT } + /* early.c uses stsi, which requires page aligned data. */ + . = ALIGN(PAGE_SIZE); .init.data : { INIT_DATA } diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 0d33893e1e8..c55a4b9ffd8 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -286,7 +286,7 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) setup_timer(&vcpu->arch.ckc_timer, kvm_s390_idle_wakeup, (unsigned long) vcpu); get_cpu_id(&vcpu->arch.cpu_id); - vcpu->arch.cpu_id.version = 0xfe; + vcpu->arch.cpu_id.version = 0xff; return 0; } |