diff options
Diffstat (limited to 'target/i386/kvm/kvm.c')
-rw-r--r-- | target/i386/kvm/kvm.c | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index db40caa..309f043 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -653,6 +653,23 @@ uint64_t kvm_arch_get_supported_msr_feature(KVMState *s, uint32_t index) must_be_one = (uint32_t)value; can_be_one = (uint32_t)(value >> 32); return can_be_one & ~must_be_one; + case MSR_IA32_ARCH_CAPABILITIES: + /* + * Special handling for fb-clear bit in ARCH_CAPABILITIES MSR. + * KVM will only report the bit if it is enabled in the host, + * but, for live migration capability purposes, we want to + * expose the bit to the guest even if it is disabled in the + * host, as long as the host itself is not vulnerable to + * the issue that the fb-clear bit is meant to mitigate. + */ + if ((value & MSR_ARCH_CAP_MDS_NO) && + (value & MSR_ARCH_CAP_TAA_NO) && + (value & MSR_ARCH_CAP_SBDR_SSDP_NO) && + (value & MSR_ARCH_CAP_FBSDP_NO) && + (value & MSR_ARCH_CAP_PSDP_NO)) { + value |= MSR_ARCH_CAP_FB_CLEAR; + } + return value; default: return value; @@ -3907,7 +3924,7 @@ static void kvm_init_msrs(X86CPU *cpu) assert(kvm_buf_set_msrs(cpu) == 0); } -static int kvm_put_msrs(X86CPU *cpu, int level) +static int kvm_put_msrs(X86CPU *cpu, KvmPutState level) { CPUX86State *env = &cpu->env; int i; @@ -5027,7 +5044,7 @@ static int kvm_get_apic(X86CPU *cpu) return 0; } -static int kvm_put_vcpu_events(X86CPU *cpu, int level) +static int kvm_put_vcpu_events(X86CPU *cpu, KvmPutState level) { CPUState *cs = CPU(cpu); CPUX86State *env = &cpu->env; @@ -5270,7 +5287,7 @@ static int kvm_get_nested_state(X86CPU *cpu) return ret; } -int kvm_arch_put_registers(CPUState *cpu, int level, Error **errp) +int kvm_arch_put_registers(CPUState *cpu, KvmPutState level, Error **errp) { X86CPU *x86_cpu = X86_CPU(cpu); int ret; |