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Diffstat (limited to 'arch')
-rw-r--r--arch/s390/include/asm/sysinfo.h1
-rw-r--r--arch/s390/kernel/early.c22
-rw-r--r--arch/s390/kernel/vmlinux.lds.S2
-rw-r--r--arch/s390/kvm/kvm-s390.c2
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;
}