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authorChristian Ehrhardt <ehrhardt@linux.vnet.ibm.com>2009-04-14 15:36:16 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2009-04-14 15:37:21 +0200
commit25097bf153391f7be4c591d47061b3dc4990dac2 (patch)
treee6fce72c43759d97eb80f0af1ae08c0e6058e6bc /arch/s390/include/asm/setup.h
parentb21597d0268983f8f9e8b563494f75490403e948 (diff)
downloadop-kernel-dev-25097bf153391f7be4c591d47061b3dc4990dac2.zip
op-kernel-dev-25097bf153391f7be4c591d47061b3dc4990dac2.tar.gz
[S390] s390: move machine flags to lowcore
Currently the storage of the machine flags is a globally exported unsigned long long variable. By moving the storage location into the lowcore struct we allow assembler code to check machine_flags directly even without needing a register. Addtionally the lowcore and therefore the machine flags too will be in cache most of the time. Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/setup.h')
-rw-r--r--arch/s390/include/asm/setup.h24
1 files changed, 12 insertions, 12 deletions
diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h
index e8bd6ac..38b0fc2 100644
--- a/arch/s390/include/asm/setup.h
+++ b/arch/s390/include/asm/setup.h
@@ -14,6 +14,7 @@
#ifdef __KERNEL__
+#include <asm/lowcore.h>
#include <asm/types.h>
#define PARMAREA 0x10400
@@ -63,7 +64,6 @@ extern unsigned int s390_noexec;
/*
* Machine features detected in head.S
*/
-extern unsigned long machine_flags;
#define MACHINE_FLAG_VM (1UL << 0)
#define MACHINE_FLAG_IEEE (1UL << 1)
@@ -77,28 +77,28 @@ extern unsigned long machine_flags;
#define MACHINE_FLAG_HPAGE (1UL << 10)
#define MACHINE_FLAG_PFMF (1UL << 11)
-#define MACHINE_IS_VM (machine_flags & MACHINE_FLAG_VM)
-#define MACHINE_IS_KVM (machine_flags & MACHINE_FLAG_KVM)
-#define MACHINE_HAS_DIAG9C (machine_flags & MACHINE_FLAG_DIAG9C)
+#define MACHINE_IS_VM (S390_lowcore.machine_flags & MACHINE_FLAG_VM)
+#define MACHINE_IS_KVM (S390_lowcore.machine_flags & MACHINE_FLAG_KVM)
+#define MACHINE_HAS_DIAG9C (S390_lowcore.machine_flags & MACHINE_FLAG_DIAG9C)
#ifndef __s390x__
-#define MACHINE_HAS_IEEE (machine_flags & MACHINE_FLAG_IEEE)
-#define MACHINE_HAS_CSP (machine_flags & MACHINE_FLAG_CSP)
+#define MACHINE_HAS_IEEE (S390_lowcore.machine_flags & MACHINE_FLAG_IEEE)
+#define MACHINE_HAS_CSP (S390_lowcore.machine_flags & MACHINE_FLAG_CSP)
#define MACHINE_HAS_IDTE (0)
#define MACHINE_HAS_DIAG44 (1)
-#define MACHINE_HAS_MVPG (machine_flags & MACHINE_FLAG_MVPG)
+#define MACHINE_HAS_MVPG (S390_lowcore.machine_flags & MACHINE_FLAG_MVPG)
#define MACHINE_HAS_MVCOS (0)
#define MACHINE_HAS_HPAGE (0)
#define MACHINE_HAS_PFMF (0)
#else /* __s390x__ */
#define MACHINE_HAS_IEEE (1)
#define MACHINE_HAS_CSP (1)
-#define MACHINE_HAS_IDTE (machine_flags & MACHINE_FLAG_IDTE)
-#define MACHINE_HAS_DIAG44 (machine_flags & MACHINE_FLAG_DIAG44)
+#define MACHINE_HAS_IDTE (S390_lowcore.machine_flags & MACHINE_FLAG_IDTE)
+#define MACHINE_HAS_DIAG44 (S390_lowcore.machine_flags & MACHINE_FLAG_DIAG44)
#define MACHINE_HAS_MVPG (1)
-#define MACHINE_HAS_MVCOS (machine_flags & MACHINE_FLAG_MVCOS)
-#define MACHINE_HAS_HPAGE (machine_flags & MACHINE_FLAG_HPAGE)
-#define MACHINE_HAS_PFMF (machine_flags & MACHINE_FLAG_PFMF)
+#define MACHINE_HAS_MVCOS (S390_lowcore.machine_flags & MACHINE_FLAG_MVCOS)
+#define MACHINE_HAS_HPAGE (S390_lowcore.machine_flags & MACHINE_FLAG_HPAGE)
+#define MACHINE_HAS_PFMF (S390_lowcore.machine_flags & MACHINE_FLAG_PFMF)
#endif /* __s390x__ */
#define ZFCPDUMP_HSA_SIZE (32UL<<20)
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