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| author |   Heiko Carstens <heiko.carstens@de.ibm.com> | 2014-01-01 16:19:55 +0100 |
|---|---|---|
| committer |   Christian Borntraeger <borntraeger@de.ibm.com> | 2014-04-22 13:24:47 +0200 |
| commit | e497a96ae8eda8b693bebc8f464712cd788d641f (patch) | |
| tree | 9854fadeef97a486c2a0cc6533b9df33c7ac6cd3 /arch/s390/kvm/gaccess.h | |
| parent | KVM: s390: remove old guest access functions (diff) | |
| download | linux-dev-e497a96ae8eda8b693bebc8f464712cd788d641f.tar.xz linux-dev-e497a96ae8eda8b693bebc8f464712cd788d641f.zip | |
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/kvm/gaccess.h')
| -rw-r--r-- | arch/s390/kvm/gaccess.h | 24 |
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; } /** |