diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 7 | ||||
| -rw-r--r-- | arch/x86/include/asm/shared/tdx.h | 1 | ||||
| -rw-r--r-- | arch/x86/include/uapi/asm/kvm.h | 8 | ||||
| -rw-r--r-- | arch/x86/kvm/hyperv.c | 5 | ||||
| -rw-r--r-- | arch/x86/kvm/svm/sev.c | 12 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx/tdx.c | 30 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 4 | ||||
| -rw-r--r-- | arch/x86/kvm/xen.c | 15 |
8 files changed, 74 insertions, 8 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index fb01e456b624..f7af967aa16f 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -700,8 +700,13 @@ struct kvm_vcpu_hv { struct kvm_vcpu_hv_tlb_flush_fifo tlb_flush_fifo[HV_NR_TLB_FLUSH_FIFOS]; - /* Preallocated buffer for handling hypercalls passing sparse vCPU set */ + /* + * Preallocated buffers for handling hypercalls that pass sparse vCPU + * sets (for high vCPU counts, they're too large to comfortably fit on + * the stack). + */ u64 sparse_banks[HV_MAX_SPARSE_VCPU_BANKS]; + DECLARE_BITMAP(vcpu_mask, KVM_MAX_VCPUS); struct hv_vp_assist_page vp_assist_page; diff --git a/arch/x86/include/asm/shared/tdx.h b/arch/x86/include/asm/shared/tdx.h index d8525e6ef50a..8bc074c8d7c6 100644 --- a/arch/x86/include/asm/shared/tdx.h +++ b/arch/x86/include/asm/shared/tdx.h @@ -72,6 +72,7 @@ #define TDVMCALL_MAP_GPA 0x10001 #define TDVMCALL_GET_QUOTE 0x10002 #define TDVMCALL_REPORT_FATAL_ERROR 0x10003 +#define TDVMCALL_SETUP_EVENT_NOTIFY_INTERRUPT 0x10004ULL /* * TDG.VP.VMCALL Status Codes (returned in R10) diff --git a/arch/x86/include/uapi/asm/kvm.h b/arch/x86/include/uapi/asm/kvm.h index 6f3499507c5e..0f15d683817d 100644 --- a/arch/x86/include/uapi/asm/kvm.h +++ b/arch/x86/include/uapi/asm/kvm.h @@ -965,7 +965,13 @@ struct kvm_tdx_cmd { struct kvm_tdx_capabilities { __u64 supported_attrs; __u64 supported_xfam; - __u64 reserved[254]; + + __u64 kernel_tdvmcallinfo_1_r11; + __u64 user_tdvmcallinfo_1_r11; + __u64 kernel_tdvmcallinfo_1_r12; + __u64 user_tdvmcallinfo_1_r12; + + __u64 reserved[250]; /* Configurable CPUID bits for userspace */ struct kvm_cpuid2 cpuid; diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index 24f0318c50d7..ee27064dd72f 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -1979,6 +1979,9 @@ int kvm_hv_vcpu_flush_tlb(struct kvm_vcpu *vcpu) if (entries[i] == KVM_HV_TLB_FLUSHALL_ENTRY) goto out_flush_all; + if (is_noncanonical_invlpg_address(entries[i], vcpu)) + continue; + /* * Lower 12 bits of 'address' encode the number of additional * pages to flush. @@ -2001,11 +2004,11 @@ out_flush_all: static u64 kvm_hv_flush_tlb(struct kvm_vcpu *vcpu, struct kvm_hv_hcall *hc) { struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu); + unsigned long *vcpu_mask = hv_vcpu->vcpu_mask; u64 *sparse_banks = hv_vcpu->sparse_banks; struct kvm *kvm = vcpu->kvm; struct hv_tlb_flush_ex flush_ex; struct hv_tlb_flush flush; - DECLARE_BITMAP(vcpu_mask, KVM_MAX_VCPUS); struct kvm_vcpu_hv_tlb_flush_fifo *tlb_flush_fifo; /* * Normally, there can be no more than 'KVM_HV_TLB_FLUSH_FIFO_SIZE' diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 459c3b791fd4..b201f77fcd49 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -1971,6 +1971,10 @@ static int sev_check_source_vcpus(struct kvm *dst, struct kvm *src) struct kvm_vcpu *src_vcpu; unsigned long i; + if (src->created_vcpus != atomic_read(&src->online_vcpus) || + dst->created_vcpus != atomic_read(&dst->online_vcpus)) + return -EBUSY; + if (!sev_es_guest(src)) return 0; @@ -4445,8 +4449,12 @@ static void sev_es_init_vmcb(struct vcpu_svm *svm) * the VMSA will be NULL if this vCPU is the destination for intrahost * migration, and will be copied later. */ - if (svm->sev_es.vmsa && !svm->sev_es.snp_has_guest_vmsa) - svm->vmcb->control.vmsa_pa = __pa(svm->sev_es.vmsa); + if (!svm->sev_es.snp_has_guest_vmsa) { + if (svm->sev_es.vmsa) + svm->vmcb->control.vmsa_pa = __pa(svm->sev_es.vmsa); + else + svm->vmcb->control.vmsa_pa = INVALID_PAGE; + } if (cpu_feature_enabled(X86_FEATURE_ALLOWED_SEV_FEATURES)) svm->vmcb->control.allowed_sev_features = sev->vmsa_features | diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c index 1ad20c273f3b..f31ccdeb905b 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -173,6 +173,9 @@ static void td_init_cpuid_entry2(struct kvm_cpuid_entry2 *entry, unsigned char i tdx_clear_unsupported_cpuid(entry); } +#define TDVMCALLINFO_GET_QUOTE BIT(0) +#define TDVMCALLINFO_SETUP_EVENT_NOTIFY_INTERRUPT BIT(1) + static int init_kvm_tdx_caps(const struct tdx_sys_info_td_conf *td_conf, struct kvm_tdx_capabilities *caps) { @@ -188,6 +191,10 @@ static int init_kvm_tdx_caps(const struct tdx_sys_info_td_conf *td_conf, caps->cpuid.nent = td_conf->num_cpuid_config; + caps->user_tdvmcallinfo_1_r11 = + TDVMCALLINFO_GET_QUOTE | + TDVMCALLINFO_SETUP_EVENT_NOTIFY_INTERRUPT; + for (i = 0; i < td_conf->num_cpuid_config; i++) td_init_cpuid_entry2(&caps->cpuid.entries[i], i); @@ -1530,6 +1537,27 @@ static int tdx_get_quote(struct kvm_vcpu *vcpu) return 0; } +static int tdx_setup_event_notify_interrupt(struct kvm_vcpu *vcpu) +{ + struct vcpu_tdx *tdx = to_tdx(vcpu); + u64 vector = tdx->vp_enter_args.r12; + + if (vector < 32 || vector > 255) { + tdvmcall_set_return_code(vcpu, TDVMCALL_STATUS_INVALID_OPERAND); + return 1; + } + + vcpu->run->exit_reason = KVM_EXIT_TDX; + vcpu->run->tdx.flags = 0; + vcpu->run->tdx.nr = TDVMCALL_SETUP_EVENT_NOTIFY_INTERRUPT; + vcpu->run->tdx.setup_event_notify.ret = TDVMCALL_STATUS_SUBFUNC_UNSUPPORTED; + vcpu->run->tdx.setup_event_notify.vector = vector; + + vcpu->arch.complete_userspace_io = tdx_complete_simple; + + return 0; +} + static int handle_tdvmcall(struct kvm_vcpu *vcpu) { switch (tdvmcall_leaf(vcpu)) { @@ -1541,6 +1569,8 @@ static int handle_tdvmcall(struct kvm_vcpu *vcpu) return tdx_get_td_vm_call_info(vcpu); case TDVMCALL_GET_QUOTE: return tdx_get_quote(vcpu); + case TDVMCALL_SETUP_EVENT_NOTIFY_INTERRUPT: + return tdx_setup_event_notify_interrupt(vcpu); default: break; } diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index a9d992d5652f..357b9e3a6cef 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3258,9 +3258,11 @@ int kvm_guest_time_update(struct kvm_vcpu *v) /* With all the info we got, fill in the values */ - if (kvm_caps.has_tsc_control) + if (kvm_caps.has_tsc_control) { tgt_tsc_khz = kvm_scale_tsc(tgt_tsc_khz, v->arch.l1_tsc_scaling_ratio); + tgt_tsc_khz = tgt_tsc_khz ? : 1; + } if (unlikely(vcpu->hw_tsc_khz != tgt_tsc_khz)) { kvm_get_time_scale(NSEC_PER_SEC, tgt_tsc_khz * 1000LL, diff --git a/arch/x86/kvm/xen.c b/arch/x86/kvm/xen.c index 9b029bb29a16..5fa2cca43653 100644 --- a/arch/x86/kvm/xen.c +++ b/arch/x86/kvm/xen.c @@ -1971,8 +1971,19 @@ int kvm_xen_setup_evtchn(struct kvm *kvm, { struct kvm_vcpu *vcpu; - if (ue->u.xen_evtchn.port >= max_evtchn_port(kvm)) - return -EINVAL; + /* + * Don't check for the port being within range of max_evtchn_port(). + * Userspace can configure what ever targets it likes; events just won't + * be delivered if/while the target is invalid, just like userspace can + * configure MSIs which target non-existent APICs. + * + * This allow on Live Migration and Live Update, the IRQ routing table + * can be restored *independently* of other things like creating vCPUs, + * without imposing an ordering dependency on userspace. In this + * particular case, the problematic ordering would be with setting the + * Xen 'long mode' flag, which changes max_evtchn_port() to allow 4096 + * instead of 1024 event channels. + */ /* We only support 2 level event channels for now */ if (ue->u.xen_evtchn.priority != KVM_IRQ_ROUTING_XEN_EVTCHN_PRIO_2LEVEL) |