From: Martin Schwidefsky <schwidefsky@de.ibm.com>
To: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>
Subject: [patch 13/32] [PATCH] add MACHINE_IS_LPAR flag
Date: Wed, 24 Feb 2010 09:44:43 +0100 [thread overview]
Message-ID: <20100224084449.732641600@de.ibm.com> (raw)
In-Reply-To: 20100224084430.193562869@de.ibm.com
[-- Attachment #1: 112-lpar-machine-flag.diff --]
[-- Type: text/plain, Size: 3950 bytes --]
From: Martin Schwidefsky <schwidefsky@de.ibm.com>
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>
---
arch/s390/include/asm/setup.h | 3 +++
arch/s390/kernel/early.c | 9 ++++++---
arch/s390/kernel/setup.c | 4 ++--
drivers/s390/cio/cio.c | 2 +-
drivers/s390/cio/qdio_main.c | 2 +-
5 files changed, 13 insertions(+), 7 deletions(-)
Index: quilt-2.6/arch/s390/include/asm/setup.h
===================================================================
--- quilt-2.6.orig/arch/s390/include/asm/setup.h 2010-02-24 09:28:13.000000000 +0100
+++ quilt-2.6/arch/s390/include/asm/setup.h 2010-02-24 09:44:25.000000000 +0100
@@ -71,9 +71,12 @@
#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__
Index: quilt-2.6/arch/s390/kernel/early.c
===================================================================
--- quilt-2.6.orig/arch/s390/kernel/early.c 2010-02-24 09:28:13.000000000 +0100
+++ quilt-2.6/arch/s390/kernel/early.c 2010-02-24 09:44:25.000000000 +0100
@@ -214,10 +214,13 @@
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 */
Index: quilt-2.6/arch/s390/kernel/setup.c
===================================================================
--- quilt-2.6.orig/arch/s390/kernel/setup.c 2010-02-24 09:28:13.000000000 +0100
+++ quilt-2.6/arch/s390/kernel/setup.c 2010-02-24 09:44:25.000000000 +0100
@@ -804,7 +804,7 @@
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 @@
"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 */
Index: quilt-2.6/drivers/s390/cio/cio.c
===================================================================
--- quilt-2.6.orig/drivers/s390/cio/cio.c 2010-02-24 09:28:13.000000000 +0100
+++ quilt-2.6/drivers/s390/cio/cio.c 2010-02-24 09:44:25.000000000 +0100
@@ -661,7 +661,7 @@
* We don't do this for VM because a tpi drops the cpu
* 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();
set_irq_regs(old_regs);
}
Index: quilt-2.6/drivers/s390/cio/qdio_main.c
===================================================================
--- quilt-2.6.orig/drivers/s390/cio/qdio_main.c 2010-02-24 09:44:25.000000000 +0100
+++ quilt-2.6/drivers/s390/cio/qdio_main.c 2010-02-24 09:44:25.000000000 +0100
@@ -534,7 +534,7 @@
if ((bufnr != q->last_move) || q->qdio_error) {
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();
return 1;
} else
next prev parent reply other threads:[~2010-02-24 8:44 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-24 8:44 [patch 00/32] s390 patch queue for 2.6.34 Martin Schwidefsky
2010-02-24 8:44 ` [patch 01/32] [PATCH] uaccess: implement strict user copy checks Martin Schwidefsky
2010-02-24 8:44 ` [patch 02/32] [PATCH] adapt text to cu3088-removal Martin Schwidefsky
2010-02-24 8:44 ` [patch 03/32] [PATCH] cio: consolidate workqueues Martin Schwidefsky
2010-02-24 8:44 ` [patch 04/32] [PATCH] cio: introduce cio_settle Martin Schwidefsky
2010-02-24 8:44 ` [patch 05/32] [PATCH] cio: wait for channel report Martin Schwidefsky
2010-02-24 8:44 ` [patch 06/32] [PATCH] cio: make wait_events interruptible Martin Schwidefsky
2010-02-24 8:44 ` [patch 07/32] [PATCH] use inline assembly contraints available with gcc 3.3.3 Martin Schwidefsky
2010-02-24 8:44 ` [patch 08/32] [PATCH] zfcpdump: remove cross arch dump support Martin Schwidefsky
2010-02-24 8:44 ` [patch 09/32] [PATCH] smp: rename and add lowcore defines Martin Schwidefsky
2010-02-24 8:44 ` [patch 10/32] [PATCH] smp: always reboot on cpu 0 Martin Schwidefsky
2010-02-24 8:44 ` [patch 11/32] [PATCH] qdio: account processed SBAL during queue scan Martin Schwidefsky
2010-02-24 8:44 ` [patch 12/32] [PATCH] qdio: optimize cache line usage of struct qdio_irq Martin Schwidefsky
2010-02-24 8:44 ` Martin Schwidefsky [this message]
2010-02-24 8:44 ` [patch 14/32] [PATCH] sysinfo: fix SYSIB 3,2,2 structure Martin Schwidefsky
2010-02-24 8:44 ` [patch 15/32] [PATCH] spinlock: check virtual cpu running status Martin Schwidefsky
2010-02-24 8:44 ` [patch 16/32] [PATCH] smp: rework sigp code Martin Schwidefsky
2010-02-24 8:44 ` [patch 17/32] [PATCH] Replace ENOTSUPP usage with EOPNOTSUPP Martin Schwidefsky
2010-02-24 8:44 ` [patch 18/32] [PATCH] free_initmem: reduce code duplication Martin Schwidefsky
2010-02-24 8:44 ` [patch 19/32] [PATCH] ccw_device_notify: improve return codes Martin Schwidefsky
2010-02-24 8:44 ` [patch 20/32] [PATCH] Cleanup struct _lowcore usage and defines Martin Schwidefsky
2010-02-24 8:44 ` [patch 21/32] [PATCH] bug: use relative pointers in bug table entries Martin Schwidefsky
2010-02-24 8:44 ` [patch 22/32] [PATCH] use kprobes_built_in() in mm/fault code Martin Schwidefsky
2010-02-24 8:44 ` [patch 23/32] [PATCH] dasd: fix online/offline race Martin Schwidefsky
2010-02-24 8:44 ` [patch 24/32] [PATCH] add z9-ec/z10 instruction to kernel disassembler Martin Schwidefsky
2010-02-24 8:44 ` [patch 25/32] [PATCH] seq_file: convert drivers/s390/ Martin Schwidefsky
2010-02-24 8:44 ` [patch 26/32] [PATCH] codepage conversion of kernel parameter line Martin Schwidefsky
2010-02-24 8:44 ` [patch 27/32] [PATCH] Define new s390 ELF note sections in elf.h Martin Schwidefsky
2010-02-24 8:44 ` [patch 28/32] [PATCH] add support for compressed kernels Martin Schwidefsky
2010-02-24 8:44 ` [patch 29/32] [PATCH] correct vdso version string Martin Schwidefsky
2010-02-24 8:45 ` [patch 30/32] [PATCH] dasd: fix refcounting Martin Schwidefsky
2010-02-24 8:45 ` [patch 31/32] [PATCH] dasd: correct offline processing Martin Schwidefsky
2010-02-24 8:45 ` [patch 32/32] [PATCH] cio: trigger subchannel event at resume time Martin Schwidefsky
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