[S390] Use gmap translation for accessing guest memory
This patch removes kvm-s390 internal assumption of a linear mapping
of guest address space to user space. Previously, guest memory was
translated to user addresses using a fixed offset (gmsor). The new
code uses gmap_fault to resolve guest addresses.
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/kvm/sigp.c b/arch/s390/kvm/sigp.c
index 702276f..d6a50c1 100644
--- a/arch/s390/kvm/sigp.c
+++ b/arch/s390/kvm/sigp.c
@@ -189,10 +189,8 @@
/* make sure that the new value is valid memory */
address = address & 0x7fffe000u;
- if ((copy_from_user(&tmp, (void __user *)
- (address + vcpu->arch.sie_block->gmsor) , 1)) ||
- (copy_from_user(&tmp, (void __user *)(address +
- vcpu->arch.sie_block->gmsor + PAGE_SIZE), 1))) {
+ if (copy_from_guest_absolute(vcpu, &tmp, address, 1) ||
+ copy_from_guest_absolute(vcpu, &tmp, address + PAGE_SIZE, 1)) {
*reg |= SIGP_STAT_INVALID_PARAMETER;
return 1; /* invalid parameter */
}