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[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>
This commit is contained in:
Martin Schwidefsky 2010-02-26 22:37:38 +01:00 committed by Martin Schwidefsky
parent 432ac5e04b
commit 27d71602b4
5 changed files with 13 additions and 7 deletions
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3
arch/s390/include/asm/setup.h
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@ -71,9 +71,12 @@ extern unsigned int user_mode;
#define MACHINE_FLAG_KVM (1UL << 9) #define MACHINE_FLAG_KVM (1UL << 9)
#define MACHINE_FLAG_HPAGE (1UL << 10) #define MACHINE_FLAG_HPAGE (1UL << 10)
#define MACHINE_FLAG_PFMF (1UL << 11) #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_VM (S390_lowcore.machine_flags & MACHINE_FLAG_VM)
#define MACHINE_IS_KVM (S390_lowcore.machine_flags & MACHINE_FLAG_KVM) #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) #define MACHINE_HAS_DIAG9C (S390_lowcore.machine_flags & MACHINE_FLAG_DIAG9C)
#ifndef __s390x__ #ifndef __s390x__

9
arch/s390/kernel/early.c
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@ -214,10 +214,13 @@ static __initdata struct sysinfo_3_2_2 vmms __aligned(PAGE_SIZE);
static noinline __init void detect_machine_type(void) static noinline __init void detect_machine_type(void)
{ {
/* No VM information? Looks like LPAR */ /* Check current-configuration-level */
if (stsi(&vmms, 3, 2, 2) == -ENOSYS) if ((stsi(NULL, 0, 0, 0) >> 28) <= 2) {
S390_lowcore.machine_flags |= MACHINE_FLAG_LPAR;
return; return;
if (!vmms.count) }
/* Get virtual-machine cpu information. */
if (stsi(&vmms, 3, 2, 2) == -ENOSYS || !vmms.count)
return; return;
/* Running under KVM? If not we assume z/VM */ /* Running under KVM? If not we assume z/VM */

4
arch/s390/kernel/setup.c
View File

@ -804,7 +804,7 @@ setup_arch(char **cmdline_p)
if (MACHINE_IS_VM) if (MACHINE_IS_VM)
pr_info("Linux is running as a z/VM " pr_info("Linux is running as a z/VM "
"guest operating system in 31-bit mode\n"); "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"); pr_info("Linux is running natively in 31-bit mode\n");
if (MACHINE_HAS_IEEE) if (MACHINE_HAS_IEEE)
pr_info("The hardware system has IEEE compatible " 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"); "guest operating system in 64-bit mode\n");
else if (MACHINE_IS_KVM) else if (MACHINE_IS_KVM)
pr_info("Linux is running under KVM in 64-bit mode\n"); 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"); pr_info("Linux is running natively in 64-bit mode\n");
#endif /* CONFIG_64BIT */ #endif /* CONFIG_64BIT */

2
drivers/s390/cio/cio.c
View File

@ -661,7 +661,7 @@ void __irq_entry do_IRQ(struct pt_regs *regs)
* We don't do this for VM because a tpi drops the cpu * We don't do this for VM because a tpi drops the cpu
* out of the sie which costs more cycles than it saves. * out of the sie which costs more cycles than it saves.
*/ */
} while (!MACHINE_IS_VM && tpi (NULL) != 0); } while (MACHINE_IS_LPAR && tpi(NULL) != 0);
irq_exit(); irq_exit();
set_irq_regs(old_regs); set_irq_regs(old_regs);
} }

2
drivers/s390/cio/qdio_main.c
View File

@ -534,7 +534,7 @@ static int qdio_inbound_q_moved(struct qdio_q *q)
if ((bufnr != q->last_move) || q->qdio_error) { if ((bufnr != q->last_move) || q->qdio_error) {
q->last_move = bufnr; q->last_move = bufnr;
if (!is_thinint_irq(q->irq_ptr) && !MACHINE_IS_VM) if (!is_thinint_irq(q->irq_ptr) && MACHINE_IS_LPAR)
q->u.in.timestamp = get_usecs(); q->u.in.timestamp = get_usecs();
return 1; return 1;
} else } else