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KVM: s390: convert kvm_s390_store_status_unloaded()

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Convert kvm_s390_store_status_unloaded() to new guest access functions.

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>
This commit is contained in:
Heiko Carstens 2014-01-01 16:45:58 +01:00 committed by Christian Borntraeger
parent 0040e7d20f
commit d0bce6054a
1 changed files with 31 additions and 64 deletions
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95
arch/s390/kvm/kvm-s390.c
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@ -1249,83 +1249,50 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
return rc;
}
static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, void *from,
unsigned long n, int prefix)
{
if (prefix)
return copy_to_guest(vcpu, guestdest, from, n);
else
return copy_to_guest_absolute(vcpu, guestdest, from, n);
}
/*
* store status at address
* we use have two special cases:
* KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit
* KVM_S390_STORE_STATUS_PREFIXED: -> prefix
*/
int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr)
int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa)
{
unsigned char archmode = 1;
int prefix;
u64 clkcomp;
int rc;
if (addr == KVM_S390_STORE_STATUS_NOADDR) {
if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1))
if (gpa == KVM_S390_STORE_STATUS_NOADDR) {
if (write_guest_abs(vcpu, 163, &archmode, 1))
return -EFAULT;
addr = SAVE_AREA_BASE;
prefix = 0;
} else if (addr == KVM_S390_STORE_STATUS_PREFIXED) {
if (copy_to_guest(vcpu, 163ul, &archmode, 1))
gpa = SAVE_AREA_BASE;
} else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) {
if (write_guest_real(vcpu, 163, &archmode, 1))
return -EFAULT;
addr = SAVE_AREA_BASE;
prefix = 1;
} else
prefix = 0;
if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs),
vcpu->arch.guest_fpregs.fprs, 128, prefix))
return -EFAULT;
if (__guestcopy(vcpu, addr + offsetof(struct save_area, gp_regs),
vcpu->run->s.regs.gprs, 128, prefix))
return -EFAULT;
if (__guestcopy(vcpu, addr + offsetof(struct save_area, psw),
&vcpu->arch.sie_block->gpsw, 16, prefix))
return -EFAULT;
if (__guestcopy(vcpu, addr + offsetof(struct save_area, pref_reg),
&vcpu->arch.sie_block->prefix, 4, prefix))
return -EFAULT;
if (__guestcopy(vcpu,
addr + offsetof(struct save_area, fp_ctrl_reg),
&vcpu->arch.guest_fpregs.fpc, 4, prefix))
return -EFAULT;
if (__guestcopy(vcpu, addr + offsetof(struct save_area, tod_reg),
&vcpu->arch.sie_block->todpr, 4, prefix))
return -EFAULT;
if (__guestcopy(vcpu, addr + offsetof(struct save_area, timer),
&vcpu->arch.sie_block->cputm, 8, prefix))
return -EFAULT;
gpa = kvm_s390_real_to_abs(vcpu, SAVE_AREA_BASE);
}
rc = write_guest_abs(vcpu, gpa + offsetof(struct save_area, fp_regs),
vcpu->arch.guest_fpregs.fprs, 128);
rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, gp_regs),
vcpu->run->s.regs.gprs, 128);
rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, psw),
&vcpu->arch.sie_block->gpsw, 16);
rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, pref_reg),
&vcpu->arch.sie_block->prefix, 4);
rc |= write_guest_abs(vcpu,
gpa + offsetof(struct save_area, fp_ctrl_reg),
&vcpu->arch.guest_fpregs.fpc, 4);
rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, tod_reg),
&vcpu->arch.sie_block->todpr, 4);
rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, timer),
&vcpu->arch.sie_block->cputm, 8);
clkcomp = vcpu->arch.sie_block->ckc >> 8;
if (__guestcopy(vcpu, addr + offsetof(struct save_area, clk_cmp),
&clkcomp, 8, prefix))
return -EFAULT;
if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs),
&vcpu->run->s.regs.acrs, 64, prefix))
return -EFAULT;
if (__guestcopy(vcpu,
addr + offsetof(struct save_area, ctrl_regs),
&vcpu->arch.sie_block->gcr, 128, prefix))
return -EFAULT;
return 0;
rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, clk_cmp),
&clkcomp, 8);
rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, acc_regs),
&vcpu->run->s.regs.acrs, 64);
rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, ctrl_regs),
&vcpu->arch.sie_block->gcr, 128);
return rc ? -EFAULT : 0;
}
int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)