KVM: s390: Guarded storage fixup and keyless subset mode
- detect and use the keyless subset mode (guests without storage keys) - fix vSIE support for sdnxc - fix machine check data for guarded storage -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.14 (GNU/Linux) iQIcBAABAgAGBQJY+dkNAAoJEBF7vIC1phx8HC4P+gJtKOhNT9+mAkI3ZEuIH+UY OB+2XIkvJpw1F47ZpL9dReEUtOYdF+r0sBmeel+zWjzfwLFBrZqgVRLG18St1JkQ i4jGkW7oQyZ7Lc9fhZA5hcRpaN8zN571+wAiYPNtg13oTzsm2N1gmMVBKVC6LMWi aoNGornkow9g6VhQiA9yl5ZHtbWEHT2hTE7CmUKPSAqe/SsdTSZ6svSCzWeRsUmT +/bmgZuy07Uol6N99xQWGWtYSKQML32THA/b14i14GEy2c7dUnMyE3PQ0jnOi4zd Jg9xr2+VOgcZvubhXrslVOQr34qZkAkuCWFC8hqgc6LYJjKXimW/9MCOVDqsLHD8 gIFXVHaIX30HwUEK4A3pDByBRVYyZ5RtdB/LcIoslbYathig+JYaXEPw2PHmEi2K IwUK+dBJpQUpjh2djZBxmC2zMFjzDqQ0lB1y1UkZUeHFVTYSzsi/TI+ovrg6rNJ5 WQLJIOBY0jNEWatM5ZNUfXdiCO8na0bVJlZU+YUoVFXu0DNmotf8gwfuqj3V2j7v JoHGGpjZyw6wwi0DPGo2tJ7h78s5psRGJIuBmRl9FaTn8KavZBLE+/s7TNO+SOTH Q08Qvowoz7eVZlKWtF3XG6FgrptNKpXO3YPj/c+kHW+b39JUr6t/1uoKWw7PrP8d IIXwghvNwgq8hWgt+zD6 =Z5HR -----END PGP SIGNATURE----- Merge tag 'kvm-s390-next-4.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD KVM: s390: Guarded storage fixup and keyless subset mode - detect and use the keyless subset mode (guests without storage keys) - fix vSIE support for sdnxc - fix machine check data for guarded storage
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commit
bd17117bb2
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@ -122,6 +122,7 @@ struct esca_block {
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#define CPUSTAT_SLSR 0x00002000
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#define CPUSTAT_ZARCH 0x00000800
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#define CPUSTAT_MCDS 0x00000100
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#define CPUSTAT_KSS 0x00000200
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#define CPUSTAT_SM 0x00000080
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#define CPUSTAT_IBS 0x00000040
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#define CPUSTAT_GED2 0x00000010
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@ -185,6 +186,7 @@ struct kvm_s390_sie_block {
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#define ICPT_OPEREXC 0x2C
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#define ICPT_PARTEXEC 0x38
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#define ICPT_IOINST 0x40
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#define ICPT_KSS 0x5c
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__u8 icptcode; /* 0x0050 */
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__u8 icptstatus; /* 0x0051 */
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__u16 ihcpu; /* 0x0052 */
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@ -75,6 +75,7 @@ struct sclp_info {
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unsigned char has_pfmfi : 1;
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unsigned char has_ibs : 1;
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unsigned char has_skey : 1;
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unsigned char has_kss : 1;
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unsigned int ibc;
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unsigned int mtid;
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unsigned int mtid_cp;
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@ -119,6 +119,7 @@ struct kvm_s390_vm_cpu_machine {
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#define KVM_S390_VM_CPU_FEAT_CMMA 10
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#define KVM_S390_VM_CPU_FEAT_PFMFI 11
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#define KVM_S390_VM_CPU_FEAT_SIGPIF 12
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#define KVM_S390_VM_CPU_FEAT_KSS 13
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struct kvm_s390_vm_cpu_feat {
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__u64 feat[16];
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};
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@ -426,6 +426,9 @@ int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu)
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case ICPT_PARTEXEC:
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rc = handle_partial_execution(vcpu);
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break;
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case ICPT_KSS:
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rc = kvm_s390_skey_check_enable(vcpu);
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break;
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default:
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return -EOPNOTSUPP;
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}
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@ -419,6 +419,8 @@ static int __write_machine_check(struct kvm_vcpu *vcpu,
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/* take care of lazy register loading */
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save_fpu_regs();
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save_access_regs(vcpu->run->s.regs.acrs);
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if (MACHINE_HAS_GS && vcpu->arch.gs_enabled)
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save_gs_cb(current->thread.gs_cb);
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/* Extended save area */
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rc = read_guest_lc(vcpu, __LC_MCESAD, &ext_sa_addr,
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@ -300,6 +300,8 @@ static void kvm_s390_cpu_feat_init(void)
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allow_cpu_feat(KVM_S390_VM_CPU_FEAT_CEI);
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if (sclp.has_ibs)
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allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IBS);
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if (sclp.has_kss)
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allow_cpu_feat(KVM_S390_VM_CPU_FEAT_KSS);
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/*
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* KVM_S390_VM_CPU_FEAT_SKEY: Wrong shadow of PTE.I bits will make
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* all skey handling functions read/set the skey from the PGSTE
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@ -2034,7 +2036,11 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
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vcpu->arch.sie_block->sdnxo = ((unsigned long) &vcpu->run->s.regs.sdnx)
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| SDNXC;
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vcpu->arch.sie_block->riccbd = (unsigned long) &vcpu->run->s.regs.riccb;
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vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE;
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if (sclp.has_kss)
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atomic_or(CPUSTAT_KSS, &vcpu->arch.sie_block->cpuflags);
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else
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vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE;
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if (vcpu->kvm->arch.use_cmma) {
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rc = kvm_s390_vcpu_setup_cmma(vcpu);
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@ -254,6 +254,7 @@ int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
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int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
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int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
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int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
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int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu);
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/* implemented in vsie.c */
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int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu);
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@ -198,18 +198,25 @@ static int handle_store_cpu_address(struct kvm_vcpu *vcpu)
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return 0;
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}
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static int __skey_check_enable(struct kvm_vcpu *vcpu)
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int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu)
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{
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int rc = 0;
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struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block;
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trace_kvm_s390_skey_related_inst(vcpu);
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if (!(vcpu->arch.sie_block->ictl & (ICTL_ISKE | ICTL_SSKE | ICTL_RRBE)))
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if (!(sie_block->ictl & (ICTL_ISKE | ICTL_SSKE | ICTL_RRBE)) &&
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!(atomic_read(&sie_block->cpuflags) & CPUSTAT_KSS))
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return rc;
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rc = s390_enable_skey();
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VCPU_EVENT(vcpu, 3, "enabling storage keys for guest: %d", rc);
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if (!rc)
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vcpu->arch.sie_block->ictl &= ~(ICTL_ISKE | ICTL_SSKE | ICTL_RRBE);
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if (!rc) {
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if (atomic_read(&sie_block->cpuflags) & CPUSTAT_KSS)
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atomic_andnot(CPUSTAT_KSS, &sie_block->cpuflags);
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else
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sie_block->ictl &= ~(ICTL_ISKE | ICTL_SSKE |
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ICTL_RRBE);
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}
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return rc;
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}
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@ -218,7 +225,7 @@ static int try_handle_skey(struct kvm_vcpu *vcpu)
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int rc;
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vcpu->stat.instruction_storage_key++;
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rc = __skey_check_enable(vcpu);
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rc = kvm_s390_skey_check_enable(vcpu);
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if (rc)
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return rc;
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if (sclp.has_skey) {
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@ -916,7 +923,7 @@ static int handle_pfmf(struct kvm_vcpu *vcpu)
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}
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if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK) {
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int rc = __skey_check_enable(vcpu);
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int rc = kvm_s390_skey_check_enable(vcpu);
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if (rc)
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return rc;
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@ -117,6 +117,8 @@ static int prepare_cpuflags(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
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newflags |= cpuflags & CPUSTAT_SM;
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if (test_kvm_cpu_feat(vcpu->kvm, KVM_S390_VM_CPU_FEAT_IBS))
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newflags |= cpuflags & CPUSTAT_IBS;
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if (test_kvm_cpu_feat(vcpu->kvm, KVM_S390_VM_CPU_FEAT_KSS))
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newflags |= cpuflags & CPUSTAT_KSS;
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atomic_set(&scb_s->cpuflags, newflags);
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return 0;
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@ -289,7 +291,9 @@ static int shadow_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
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* bits. Therefore we cannot provide interpretation and would later
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* have to provide own emulation handlers.
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*/
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scb_s->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE;
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if (!(atomic_read(&scb_s->cpuflags) & CPUSTAT_KSS))
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scb_s->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE;
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scb_s->icpua = scb_o->icpua;
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if (!(atomic_read(&scb_s->cpuflags) & CPUSTAT_SM))
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@ -627,7 +631,7 @@ static int pin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
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rc = set_validity_icpt(scb_s, 0x10b0U);
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if (rc)
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goto unpin;
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scb_s->sdnxo = hpa;
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scb_s->sdnxo = hpa | sdnxc;
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}
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return 0;
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unpin:
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@ -40,7 +40,8 @@ struct read_info_sccb {
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u8 fac85; /* 85 */
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u8 _pad_86[91 - 86]; /* 86-90 */
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u8 flags; /* 91 */
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u8 _pad_92[99 - 92]; /* 92-98 */
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u8 _pad_92[98 - 92]; /* 92-97 */
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u8 fac98; /* 98 */
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u8 hamaxpow; /* 99 */
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u32 rnsize2; /* 100-103 */
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u64 rnmax2; /* 104-111 */
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@ -99,6 +100,7 @@ static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb)
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sclp.has_pfmfi = !!(sccb->fac117 & 0x40);
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sclp.has_ibs = !!(sccb->fac117 & 0x20);
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sclp.has_hvs = !!(sccb->fac119 & 0x80);
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sclp.has_kss = !!(sccb->fac98 & 0x01);
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if (sccb->fac85 & 0x02)
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S390_lowcore.machine_flags |= MACHINE_FLAG_ESOP;
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sclp.rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2;
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