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| author |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2010-02-26 22:37:38 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-02-26 22:37:31 +0100 |
| commit | 27d71602b4a605fbb31088e69ac12187e69a9443 (patch) | |
| tree | 2f4203a85e5191abbb6ffd21c277eb2afb23a0ab /arch/s390 | |
| parent | [S390] qdio: optimize cache line usage of struct qdio_irq (diff) | |
| download | linux-dev-27d71602b4a605fbb31088e69ac12187e69a9443.tar.xz linux-dev-27d71602b4a605fbb31088e69ac12187e69a9443.zip | |
[S390] add MACHINE_IS_LPAR flag
Introduce the MACHINE_IS_LPAR flag for code that should only be
executed if Linux is running in an LPAR.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/setup.h | 3 | ||||
| -rw-r--r-- | arch/s390/kernel/early.c | 9 | ||||
| -rw-r--r-- | arch/s390/kernel/setup.c | 4 |
3 files changed, 11 insertions, 5 deletions
diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h index 52a779c337e8..76f530b65f00 100644 --- a/arch/s390/include/asm/setup.h +++ b/arch/s390/include/asm/setup.h @@ -71,9 +71,12 @@ extern unsigned int user_mode; #define MACHINE_FLAG_KVM (1UL << 9) #define MACHINE_FLAG_HPAGE (1UL << 10) #define MACHINE_FLAG_PFMF (1UL << 11) +#define MACHINE_FLAG_LPAR (1UL << 12) #define MACHINE_IS_VM (S390_lowcore.machine_flags & MACHINE_FLAG_VM) #define MACHINE_IS_KVM (S390_lowcore.machine_flags & MACHINE_FLAG_KVM) +#define MACHINE_IS_LPAR (S390_lowcore.machine_flags & MACHINE_FLAG_LPAR) + #define MACHINE_HAS_DIAG9C (S390_lowcore.machine_flags & MACHINE_FLAG_DIAG9C) #ifndef __s390x__ diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index e49e9e0c69fd..02e45861b55b 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -214,10 +214,13 @@ static __initdata struct sysinfo_3_2_2 vmms __aligned(PAGE_SIZE); static noinline __init void detect_machine_type(void) { - /* No VM information? Looks like LPAR */ - if (stsi(&vmms, 3, 2, 2) == -ENOSYS) + /* Check current-configuration-level */ + if ((stsi(NULL, 0, 0, 0) >> 28) <= 2) { + S390_lowcore.machine_flags |= MACHINE_FLAG_LPAR; return; - if (!vmms.count) + } + /* Get virtual-machine cpu information. */ + if (stsi(&vmms, 3, 2, 2) == -ENOSYS || !vmms.count) return; /* Running under KVM? If not we assume z/VM */ diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 8d8957b38ab3..d9fb98cde0fa 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -804,7 +804,7 @@ setup_arch(char **cmdline_p) if (MACHINE_IS_VM) pr_info("Linux is running as a z/VM " "guest operating system in 31-bit mode\n"); - else + else if (MACHINE_IS_LPAR) pr_info("Linux is running natively in 31-bit mode\n"); if (MACHINE_HAS_IEEE) pr_info("The hardware system has IEEE compatible " @@ -818,7 +818,7 @@ setup_arch(char **cmdline_p) "guest operating system in 64-bit mode\n"); else if (MACHINE_IS_KVM) pr_info("Linux is running under KVM in 64-bit mode\n"); - else + else if (MACHINE_IS_LPAR) pr_info("Linux is running natively in 64-bit mode\n"); #endif /* CONFIG_64BIT */ |