diff options
| -rw-r--r-- | arch/s390/kvm/vsie.c | 50 |
1 files changed, 29 insertions, 21 deletions
diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index b6a0219e470a..8d6b765abf29 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -138,11 +138,15 @@ static int prepare_cpuflags(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) } /* Copy to APCB FORMAT1 from APCB FORMAT0 */ static int setup_apcb10(struct kvm_vcpu *vcpu, struct kvm_s390_apcb1 *apcb_s, - unsigned long apcb_o, struct kvm_s390_apcb1 *apcb_h) + unsigned long crycb_gpa, struct kvm_s390_apcb1 *apcb_h) { struct kvm_s390_apcb0 tmp; + unsigned long apcb_gpa; - if (read_guest_real(vcpu, apcb_o, &tmp, sizeof(struct kvm_s390_apcb0))) + apcb_gpa = crycb_gpa + offsetof(struct kvm_s390_crypto_cb, apcb0); + + if (read_guest_real(vcpu, apcb_gpa, &tmp, + sizeof(struct kvm_s390_apcb0))) return -EFAULT; apcb_s->apm[0] = apcb_h->apm[0] & tmp.apm[0]; @@ -157,15 +161,19 @@ static int setup_apcb10(struct kvm_vcpu *vcpu, struct kvm_s390_apcb1 *apcb_s, * setup_apcb00 - Copy to APCB FORMAT0 from APCB FORMAT0 * @vcpu: pointer to the virtual CPU * @apcb_s: pointer to start of apcb in the shadow crycb - * @apcb_o: pointer to start of original apcb in the guest2 + * @crycb_gpa: guest physical address to start of original guest crycb * @apcb_h: pointer to start of apcb in the guest1 * * Returns 0 and -EFAULT on error reading guest apcb */ static int setup_apcb00(struct kvm_vcpu *vcpu, unsigned long *apcb_s, - unsigned long apcb_o, unsigned long *apcb_h) + unsigned long crycb_gpa, unsigned long *apcb_h) { - if (read_guest_real(vcpu, apcb_o, apcb_s, + unsigned long apcb_gpa; + + apcb_gpa = crycb_gpa + offsetof(struct kvm_s390_crypto_cb, apcb0); + + if (read_guest_real(vcpu, apcb_gpa, apcb_s, sizeof(struct kvm_s390_apcb0))) return -EFAULT; @@ -178,16 +186,20 @@ static int setup_apcb00(struct kvm_vcpu *vcpu, unsigned long *apcb_s, * setup_apcb11 - Copy the FORMAT1 APCB from the guest to the shadow CRYCB * @vcpu: pointer to the virtual CPU * @apcb_s: pointer to start of apcb in the shadow crycb - * @apcb_o: pointer to start of original guest apcb + * @crycb_gpa: guest physical address to start of original guest crycb * @apcb_h: pointer to start of apcb in the host * * Returns 0 and -EFAULT on error reading guest apcb */ static int setup_apcb11(struct kvm_vcpu *vcpu, unsigned long *apcb_s, - unsigned long apcb_o, + unsigned long crycb_gpa, unsigned long *apcb_h) { - if (read_guest_real(vcpu, apcb_o, apcb_s, + unsigned long apcb_gpa; + + apcb_gpa = crycb_gpa + offsetof(struct kvm_s390_crypto_cb, apcb1); + + if (read_guest_real(vcpu, apcb_gpa, apcb_s, sizeof(struct kvm_s390_apcb1))) return -EFAULT; @@ -200,7 +212,7 @@ static int setup_apcb11(struct kvm_vcpu *vcpu, unsigned long *apcb_s, * setup_apcb - Create a shadow copy of the apcb. * @vcpu: pointer to the virtual CPU * @crycb_s: pointer to shadow crycb - * @crycb_o: pointer to original guest crycb + * @crycb_gpa: guest physical address of original guest crycb * @crycb_h: pointer to the host crycb * @fmt_o: format of the original guest crycb. * @fmt_h: format of the host crycb. @@ -211,50 +223,46 @@ static int setup_apcb11(struct kvm_vcpu *vcpu, unsigned long *apcb_s, * Return 0 or an error number if the guest and host crycb are incompatible. */ static int setup_apcb(struct kvm_vcpu *vcpu, struct kvm_s390_crypto_cb *crycb_s, - const u32 crycb_o, + const u32 crycb_gpa, struct kvm_s390_crypto_cb *crycb_h, int fmt_o, int fmt_h) { - struct kvm_s390_crypto_cb *crycb; - - crycb = (struct kvm_s390_crypto_cb *) (unsigned long)crycb_o; - switch (fmt_o) { case CRYCB_FORMAT2: - if ((crycb_o & PAGE_MASK) != ((crycb_o + 256) & PAGE_MASK)) + if ((crycb_gpa & PAGE_MASK) != ((crycb_gpa + 256) & PAGE_MASK)) return -EACCES; if (fmt_h != CRYCB_FORMAT2) return -EINVAL; return setup_apcb11(vcpu, (unsigned long *)&crycb_s->apcb1, - (unsigned long) &crycb->apcb1, + crycb_gpa, (unsigned long *)&crycb_h->apcb1); case CRYCB_FORMAT1: switch (fmt_h) { case CRYCB_FORMAT2: return setup_apcb10(vcpu, &crycb_s->apcb1, - (unsigned long) &crycb->apcb0, + crycb_gpa, &crycb_h->apcb1); case CRYCB_FORMAT1: return setup_apcb00(vcpu, (unsigned long *) &crycb_s->apcb0, - (unsigned long) &crycb->apcb0, + crycb_gpa, (unsigned long *) &crycb_h->apcb0); } break; case CRYCB_FORMAT0: - if ((crycb_o & PAGE_MASK) != ((crycb_o + 32) & PAGE_MASK)) + if ((crycb_gpa & PAGE_MASK) != ((crycb_gpa + 32) & PAGE_MASK)) return -EACCES; switch (fmt_h) { case CRYCB_FORMAT2: return setup_apcb10(vcpu, &crycb_s->apcb1, - (unsigned long) &crycb->apcb0, + crycb_gpa, &crycb_h->apcb1); case CRYCB_FORMAT1: case CRYCB_FORMAT0: return setup_apcb00(vcpu, (unsigned long *) &crycb_s->apcb0, - (unsigned long) &crycb->apcb0, + crycb_gpa, (unsigned long *) &crycb_h->apcb0); } } |