diff options
Diffstat (limited to 'arch/s390/kvm')
| -rw-r--r-- | arch/s390/kvm/gaccess.c | 32 |
1 files changed, 17 insertions, 15 deletions
diff --git a/arch/s390/kvm/gaccess.c b/arch/s390/kvm/gaccess.c index 6af59c59cc1b..45966fbba182 100644 --- a/arch/s390/kvm/gaccess.c +++ b/arch/s390/kvm/gaccess.c @@ -831,8 +831,9 @@ int access_guest(struct kvm_vcpu *vcpu, unsigned long ga, u8 ar, void *data, unsigned long len, enum gacc_mode mode) { psw_t *psw = &vcpu->arch.sie_block->gpsw; - unsigned long _len, nr_pages, gpa, idx; + unsigned long nr_pages, gpa, idx; unsigned long pages_array[2]; + unsigned int fragment_len; unsigned long *pages; int need_ipte_lock; union asce asce; @@ -855,15 +856,15 @@ int access_guest(struct kvm_vcpu *vcpu, unsigned long ga, u8 ar, void *data, ipte_lock(vcpu); rc = guest_page_range(vcpu, ga, ar, pages, nr_pages, asce, mode); for (idx = 0; idx < nr_pages && !rc; idx++) { - gpa = *(pages + idx) + (ga & ~PAGE_MASK); - _len = min(PAGE_SIZE - (gpa & ~PAGE_MASK), len); + gpa = pages[idx] + offset_in_page(ga); + fragment_len = min(PAGE_SIZE - offset_in_page(gpa), len); if (mode == GACC_STORE) - rc = kvm_write_guest(vcpu->kvm, gpa, data, _len); + rc = kvm_write_guest(vcpu->kvm, gpa, data, fragment_len); else - rc = kvm_read_guest(vcpu->kvm, gpa, data, _len); - len -= _len; - ga += _len; - data += _len; + rc = kvm_read_guest(vcpu->kvm, gpa, data, fragment_len); + len -= fragment_len; + ga += fragment_len; + data += fragment_len; } if (need_ipte_lock) ipte_unlock(vcpu); @@ -875,19 +876,20 @@ int access_guest(struct kvm_vcpu *vcpu, unsigned long ga, u8 ar, void *data, int access_guest_real(struct kvm_vcpu *vcpu, unsigned long gra, void *data, unsigned long len, enum gacc_mode mode) { - unsigned long _len, gpa; + unsigned int fragment_len; + unsigned long gpa; int rc = 0; while (len && !rc) { gpa = kvm_s390_real_to_abs(vcpu, gra); - _len = min(PAGE_SIZE - (gpa & ~PAGE_MASK), len); + fragment_len = min(PAGE_SIZE - offset_in_page(gpa), len); if (mode) - rc = write_guest_abs(vcpu, gpa, data, _len); + rc = write_guest_abs(vcpu, gpa, data, fragment_len); else - rc = read_guest_abs(vcpu, gpa, data, _len); - len -= _len; - gra += _len; - data += _len; + rc = read_guest_abs(vcpu, gpa, data, fragment_len); + len -= fragment_len; + gra += fragment_len; + data += fragment_len; } return rc; } |