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authorHeiko Carstens <heiko.carstens@de.ibm.com>2014-01-01 16:19:55 +0100
committerChristian Borntraeger <borntraeger@de.ibm.com>2014-04-22 13:24:47 +0200
commite497a96ae8eda8b693bebc8f464712cd788d641f (patch)
tree9854fadeef97a486c2a0cc6533b9df33c7ac6cd3 /arch/s390
parent3263bd163720807e68045370b70aaf38acde1598 (diff)
KVM: s390: cleanup kvm_s390_real_to_abs()
Add kerneldoc comment to kvm_s390_real_to_abs() and change the code so it matches the coding style of the rest of gaccess.h. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/kvm/gaccess.h24
1 files changed, 16 insertions, 8 deletions
diff --git a/arch/s390/kvm/gaccess.h b/arch/s390/kvm/gaccess.h
index ed4749ecef8b..1079c8fc6d0d 100644
--- a/arch/s390/kvm/gaccess.h
+++ b/arch/s390/kvm/gaccess.h
@@ -19,16 +19,24 @@
#include <linux/ptrace.h>
#include "kvm-s390.h"
-/* Convert real to absolute address by applying the prefix of the CPU */
+/**
+ * kvm_s390_real_to_abs - convert guest real address to guest absolute address
+ * @vcpu - guest virtual cpu
+ * @gra - guest real address
+ *
+ * Returns the guest absolute address that corresponds to the passed guest real
+ * address @gra of a virtual guest cpu by applying its prefix.
+ */
static inline unsigned long kvm_s390_real_to_abs(struct kvm_vcpu *vcpu,
- unsigned long gaddr)
+ unsigned long gra)
{
- unsigned long prefix = vcpu->arch.sie_block->prefix;
- if (gaddr < 2 * PAGE_SIZE)
- gaddr += prefix;
- else if (gaddr >= prefix && gaddr < prefix + 2 * PAGE_SIZE)
- gaddr -= prefix;
- return gaddr;
+ unsigned long prefix = vcpu->arch.sie_block->prefix;
+
+ if (gra < 2 * PAGE_SIZE)
+ gra += prefix;
+ else if (gra >= prefix && gra < prefix + 2 * PAGE_SIZE)
+ gra -= prefix;
+ return gra;
}
/**