diff options
| -rw-r--r-- | arch/s390/include/asm/kvm_host.h | 12 | ||||
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 2 | ||||
| -rw-r--r-- | arch/s390/kvm/vsie.c | 34 |
3 files changed, 44 insertions, 4 deletions
diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 8a4f4a39f7a2..aa4c4685f95c 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -504,6 +504,18 @@ struct kvm_s390_cpu_model { struct kvm_s390_vm_cpu_uv_feat uv_feat_guest; }; +#define S390_ARCH_FAC_FORMAT_2 2 +struct kvm_s390_flcb2 { + union { + struct { + u8 reserved0[7]; + u8 length; + }; + u64 header_val; + }; + u64 facilities[S390_ARCH_FAC_LIST_SIZE_U64]; +}; + typedef int (*crypto_hook)(struct kvm_vcpu *vcpu); struct kvm_s390_crypto { diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 7334c160d019..de28ee1f7882 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -465,6 +465,8 @@ static void __init kvm_s390_cpu_feat_init(void) allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IBS); if (sclp.has_kss) allow_cpu_feat(KVM_S390_VM_CPU_FEAT_KSS); + if (sclp.has_astfleie2) + allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ASTFLEIE2); /* * KVM_S390_VM_CPU_FEAT_SKEY: Wrong shadow of PTE.I bits will make * all skey handling functions read/set the skey from the PGSTE diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index c7dcdd460dd1..eea24562e7db 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -65,9 +65,9 @@ struct vsie_page { gpa_t scb_gpa; /* 0x0258 */ /* the shadow gmap in use by the vsie_page */ struct gmap_cache gmap_cache; /* 0x0260 */ - __u8 reserved[0x0700 - 0x0278]; /* 0x0278 */ - struct kvm_s390_crypto_cb crycb; /* 0x0700 */ - __u8 fac[S390_ARCH_FAC_LIST_SIZE_BYTE]; /* 0x0800 */ + __u8 reserved[0x06f8 - 0x0278]; /* 0x0278 */ + struct kvm_s390_crypto_cb crycb; /* 0x06f8 */ + __u8 fac[8 + S390_ARCH_FAC_LIST_SIZE_BYTE];/* 0x07f8 */ }; static_assert(sizeof(struct vsie_page) == PAGE_SIZE); @@ -1020,6 +1020,28 @@ static int handle_stfle_0(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page, return 0; } +static int handle_stfle_2(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page, u32 fac_list_origin) +{ + struct kvm_s390_flcb2 *flcb_s = (struct kvm_s390_flcb2 *)vsie_page->fac; + struct kvm_s390_sie_block *scb_s = &vsie_page->scb_s; + u64 len; + + if (read_guest_real(vcpu, fac_list_origin, &len, sizeof(len))) + return set_validity_icpt(scb_s, 0x1090U); + + /* discard reserved bits */ + len = (len & U8_MAX); + flcb_s->header_val = len; + len += 1; + + if (read_guest_real(vcpu, fac_list_origin + offsetof(struct kvm_s390_flcb2, facilities), + &flcb_s->facilities, len * sizeof(u64))) + return set_validity_icpt(scb_s, 0x1090U); + + scb_s->fac = (u32)virt_to_phys(&vsie_page->fac) | S390_ARCH_FAC_FORMAT_2; + return 0; +} + /* * Try to shadow + enable the guest 2 provided facility list. * Retry instruction execution if enabled for and provided by guest 2. @@ -1034,6 +1056,8 @@ static int handle_stfle(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) int format_mask, format; u32 origin; + /* assert no overflow with maximum len */ + BUILD_BUG_ON(sizeof(vsie_page->fac) < ((S390_ARCH_FAC_LIST_SIZE_U64 + 1) * sizeof(u64))); BUILD_BUG_ON(!IS_ALIGNED(offsetof(struct vsie_page, fac), 8)); if (fac && test_kvm_facility(vcpu->kvm, 7)) { @@ -1049,9 +1073,11 @@ static int handle_stfle(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) case 0: return handle_stfle_0(vcpu, vsie_page, origin); case 1: + return set_validity_icpt(&vsie_page->scb_s, 0x1330U); case 2: + return handle_stfle_2(vcpu, vsie_page, origin); case 3: - unreachable(); + return set_validity_icpt(&vsie_page->scb_s, 0x1330U); } } return 0; |