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>
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@ -19,16 +19,24 @@
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#include <linux/ptrace.h>
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#include <linux/ptrace.h>
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#include "kvm-s390.h"
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#include "kvm-s390.h"
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/* Convert real to absolute address by applying the prefix of the CPU */
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/**
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* kvm_s390_real_to_abs - convert guest real address to guest absolute address
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* @vcpu - guest virtual cpu
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* @gra - guest real address
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*
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* Returns the guest absolute address that corresponds to the passed guest real
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* address @gra of a virtual guest cpu by applying its prefix.
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*/
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static inline unsigned long kvm_s390_real_to_abs(struct kvm_vcpu *vcpu,
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static inline unsigned long kvm_s390_real_to_abs(struct kvm_vcpu *vcpu,
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unsigned long gaddr)
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unsigned long gra)
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{
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{
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unsigned long prefix = vcpu->arch.sie_block->prefix;
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unsigned long prefix = vcpu->arch.sie_block->prefix;
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if (gaddr < 2 * PAGE_SIZE)
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gaddr += prefix;
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if (gra < 2 * PAGE_SIZE)
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else if (gaddr >= prefix && gaddr < prefix + 2 * PAGE_SIZE)
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gra += prefix;
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gaddr -= prefix;
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else if (gra >= prefix && gra < prefix + 2 * PAGE_SIZE)
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return gaddr;
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gra -= prefix;
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return gra;
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}
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}
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/**
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/**
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