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KVM: s390: Fixes for PFMF

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Add a check for low-address protection to the PFMF handler and
convert real-addresses to absolute if necessary, as it is defined
in the Principles of Operations specification.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Thomas Huth 2013-09-09 17:58:38 +02:00 • committed by Christian Borntraeger
parent f8232c8cf7
commit fb34c60365
1 changed files with 13 additions and 3 deletions
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16
arch/s390/kvm/priv.c
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@ -650,6 +650,11 @@ static int handle_pfmf(struct kvm_vcpu *vcpu)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK; start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
if (kvm_s390_check_low_addr_protection(vcpu, start))
return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
}
switch (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) { switch (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
case 0x00000000: case 0x00000000:
end = (start + (1UL << 12)) & ~((1UL << 12) - 1); end = (start + (1UL << 12)) & ~((1UL << 12) - 1);
@ -665,10 +670,15 @@ static int handle_pfmf(struct kvm_vcpu *vcpu)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
} }
while (start < end) { while (start < end) {
unsigned long useraddr; unsigned long useraddr, abs_addr;
useraddr = gmap_translate(start, vcpu->arch.gmap); /* Translate guest address to host address */
if (IS_ERR((void *)useraddr)) if ((vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) == 0)
abs_addr = kvm_s390_real_to_abs(vcpu, start);
else
abs_addr = start;
useraddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(abs_addr));
if (kvm_is_error_hva(useraddr))
return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) { if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {