diff options
Diffstat (limited to 'arch/s390')
-rw-r--r-- | arch/s390/include/asm/ctl_reg.h | 4 | ||||
-rw-r--r-- | arch/s390/kvm/gaccess.c | 39 |
2 files changed, 32 insertions, 11 deletions
diff --git a/arch/s390/include/asm/ctl_reg.h b/arch/s390/include/asm/ctl_reg.h index d0441ad2a990..e508dff92535 100644 --- a/arch/s390/include/asm/ctl_reg.h +++ b/arch/s390/include/asm/ctl_reg.h @@ -59,7 +59,9 @@ union ctlreg0 { unsigned long lap : 1; /* Low-address-protection control */ unsigned long : 4; unsigned long edat : 1; /* Enhanced-DAT-enablement control */ - unsigned long : 4; + unsigned long : 2; + unsigned long iep : 1; /* Instruction-Execution-Protection */ + unsigned long : 1; unsigned long afp : 1; /* AFP-register control */ unsigned long vx : 1; /* Vector enablement control */ unsigned long : 7; diff --git a/arch/s390/kvm/gaccess.c b/arch/s390/kvm/gaccess.c index 9da243d94cc3..6fda095f1a99 100644 --- a/arch/s390/kvm/gaccess.c +++ b/arch/s390/kvm/gaccess.c @@ -89,7 +89,7 @@ struct region3_table_entry_fc1 { unsigned long f : 1; /* Fetch-Protection Bit */ unsigned long fc : 1; /* Format-Control */ unsigned long p : 1; /* DAT-Protection Bit */ - unsigned long co : 1; /* Change-Recording Override */ + unsigned long iep: 1; /* Instruction-Execution-Protection */ unsigned long : 2; unsigned long i : 1; /* Region-Invalid Bit */ unsigned long cr : 1; /* Common-Region Bit */ @@ -131,7 +131,7 @@ struct segment_entry_fc1 { unsigned long f : 1; /* Fetch-Protection Bit */ unsigned long fc : 1; /* Format-Control */ unsigned long p : 1; /* DAT-Protection Bit */ - unsigned long co : 1; /* Change-Recording Override */ + unsigned long iep: 1; /* Instruction-Execution-Protection */ unsigned long : 2; unsigned long i : 1; /* Segment-Invalid Bit */ unsigned long cs : 1; /* Common-Segment Bit */ @@ -168,7 +168,8 @@ union page_table_entry { unsigned long z : 1; /* Zero Bit */ unsigned long i : 1; /* Page-Invalid Bit */ unsigned long p : 1; /* DAT-Protection Bit */ - unsigned long : 9; + unsigned long iep: 1; /* Instruction-Execution-Protection */ + unsigned long : 8; }; }; @@ -485,6 +486,7 @@ enum prot_type { PROT_TYPE_KEYC = 1, PROT_TYPE_ALC = 2, PROT_TYPE_DAT = 3, + PROT_TYPE_IEP = 4, }; static int trans_exc(struct kvm_vcpu *vcpu, int code, unsigned long gva, @@ -500,6 +502,9 @@ static int trans_exc(struct kvm_vcpu *vcpu, int code, unsigned long gva, switch (code) { case PGM_PROTECTION: switch (prot) { + case PROT_TYPE_IEP: + tec->b61 = 1; + /* FALL THROUGH */ case PROT_TYPE_LA: tec->b56 = 1; break; @@ -591,6 +596,7 @@ static int deref_table(struct kvm *kvm, unsigned long gpa, unsigned long *val) * @gpa: points to where guest physical (absolute) address should be stored * @asce: effective asce * @mode: indicates the access mode to be used + * @prot: returns the type for protection exceptions * * Translate a guest virtual address into a guest absolute address by means * of dynamic address translation as specified by the architecture. @@ -606,19 +612,21 @@ static int deref_table(struct kvm *kvm, unsigned long gpa, unsigned long *val) */ static unsigned long guest_translate(struct kvm_vcpu *vcpu, unsigned long gva, unsigned long *gpa, const union asce asce, - enum gacc_mode mode) + enum gacc_mode mode, enum prot_type *prot) { union vaddress vaddr = {.addr = gva}; union raddress raddr = {.addr = gva}; union page_table_entry pte; int dat_protection = 0; + int iep_protection = 0; union ctlreg0 ctlreg0; unsigned long ptr; - int edat1, edat2; + int edat1, edat2, iep; ctlreg0.val = vcpu->arch.sie_block->gcr[0]; edat1 = ctlreg0.edat && test_kvm_facility(vcpu->kvm, 8); edat2 = edat1 && test_kvm_facility(vcpu->kvm, 78); + iep = ctlreg0.iep && test_kvm_facility(vcpu->kvm, 130); if (asce.r) goto real_address; ptr = asce.origin * 4096; @@ -702,6 +710,7 @@ static unsigned long guest_translate(struct kvm_vcpu *vcpu, unsigned long gva, return PGM_TRANSLATION_SPEC; if (rtte.fc && edat2) { dat_protection |= rtte.fc1.p; + iep_protection = rtte.fc1.iep; raddr.rfaa = rtte.fc1.rfaa; goto absolute_address; } @@ -729,6 +738,7 @@ static unsigned long guest_translate(struct kvm_vcpu *vcpu, unsigned long gva, return PGM_TRANSLATION_SPEC; if (ste.fc && edat1) { dat_protection |= ste.fc1.p; + iep_protection = ste.fc1.iep; raddr.sfaa = ste.fc1.sfaa; goto absolute_address; } @@ -745,12 +755,19 @@ static unsigned long guest_translate(struct kvm_vcpu *vcpu, unsigned long gva, if (pte.z) return PGM_TRANSLATION_SPEC; dat_protection |= pte.p; + iep_protection = pte.iep; raddr.pfra = pte.pfra; real_address: raddr.addr = kvm_s390_real_to_abs(vcpu, raddr.addr); absolute_address: - if (mode == GACC_STORE && dat_protection) + if (mode == GACC_STORE && dat_protection) { + *prot = PROT_TYPE_DAT; return PGM_PROTECTION; + } + if (mode == GACC_IFETCH && iep_protection && iep) { + *prot = PROT_TYPE_IEP; + return PGM_PROTECTION; + } if (kvm_is_error_gpa(vcpu->kvm, raddr.addr)) return PGM_ADDRESSING; *gpa = raddr.addr; @@ -782,6 +799,7 @@ static int guest_page_range(struct kvm_vcpu *vcpu, unsigned long ga, u8 ar, { psw_t *psw = &vcpu->arch.sie_block->gpsw; int lap_enabled, rc = 0; + enum prot_type prot; lap_enabled = low_address_protection_enabled(vcpu, asce); while (nr_pages) { @@ -791,7 +809,7 @@ static int guest_page_range(struct kvm_vcpu *vcpu, unsigned long ga, u8 ar, PROT_TYPE_LA); ga &= PAGE_MASK; if (psw_bits(*psw).t) { - rc = guest_translate(vcpu, ga, pages, asce, mode); + rc = guest_translate(vcpu, ga, pages, asce, mode, &prot); if (rc < 0) return rc; } else { @@ -800,7 +818,7 @@ static int guest_page_range(struct kvm_vcpu *vcpu, unsigned long ga, u8 ar, rc = PGM_ADDRESSING; } if (rc) - return trans_exc(vcpu, rc, ga, ar, mode, PROT_TYPE_DAT); + return trans_exc(vcpu, rc, ga, ar, mode, prot); ga += PAGE_SIZE; pages++; nr_pages--; @@ -886,6 +904,7 @@ int guest_translate_address(struct kvm_vcpu *vcpu, unsigned long gva, u8 ar, unsigned long *gpa, enum gacc_mode mode) { psw_t *psw = &vcpu->arch.sie_block->gpsw; + enum prot_type prot; union asce asce; int rc; @@ -900,9 +919,9 @@ int guest_translate_address(struct kvm_vcpu *vcpu, unsigned long gva, u8 ar, } if (psw_bits(*psw).t && !asce.r) { /* Use DAT? */ - rc = guest_translate(vcpu, gva, gpa, asce, mode); + rc = guest_translate(vcpu, gva, gpa, asce, mode, &prot); if (rc > 0) - return trans_exc(vcpu, rc, gva, 0, mode, PROT_TYPE_DAT); + return trans_exc(vcpu, rc, gva, 0, mode, prot); } else { *gpa = kvm_s390_real_to_abs(vcpu, gva); if (kvm_is_error_gpa(vcpu->kvm, *gpa)) |