| Message ID | 20200904145431.196885-5-vkuznets@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | i386: KVM: expand Hyper-V features early | expand |
On Fri, Sep 04, 2020 at 04:54:13PM +0200, Vitaly Kuznetsov wrote: > As a preparation to expanding Hyper-V CPU features early, move > hyperv_interface_id initialization to x86_cpu_realizefn(). > > Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> > --- > target/i386/cpu.c | 6 ++++++ > target/i386/cpu.h | 1 + > target/i386/kvm.c | 18 ++++++++++++------ > 3 files changed, 19 insertions(+), 6 deletions(-) > > diff --git a/target/i386/cpu.c b/target/i386/cpu.c > index 07e9da9e567e..16888125a30a 100644 > --- a/target/i386/cpu.c > +++ b/target/i386/cpu.c > @@ -6638,6 +6638,12 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp) > memcpy(cpu->hyperv_vendor_id, cpu->hyperv_vendor, len); > } > > + /* 'Hv#1' interface identification*/ > + cpu->hyperv_interface_id[0] = 0x31237648; > + cpu->hyperv_interface_id[1] = 0; > + cpu->hyperv_interface_id[2] = 0; > + cpu->hyperv_interface_id[3] = 0; > + > if (cpu->ucode_rev == 0) { > /* The default is the same as KVM's. */ > if (IS_AMD_CPU(env)) { > diff --git a/target/i386/cpu.h b/target/i386/cpu.h > index 903994818093..91edc54a268c 100644 > --- a/target/i386/cpu.h > +++ b/target/i386/cpu.h > @@ -1660,6 +1660,7 @@ struct X86CPU { > bool hyperv_passthrough; > OnOffAuto hyperv_no_nonarch_cs; > uint32_t hyperv_vendor_id[3]; > + uint32_t hyperv_interface_id[4]; > > bool check_cpuid; > bool enforce_cpuid; > diff --git a/target/i386/kvm.c b/target/i386/kvm.c > index 47779c5e1efd..a36c65100cd0 100644 > --- a/target/i386/kvm.c > +++ b/target/i386/kvm.c > @@ -1188,7 +1188,6 @@ static int hyperv_handle_properties(CPUState *cs, > CPUX86State *env = &cpu->env; > struct kvm_cpuid2 *cpuid; > struct kvm_cpuid_entry2 *c; > - uint32_t signature[3]; > uint32_t cpuid_i = 0; > int r; > > @@ -1232,6 +1231,14 @@ static int hyperv_handle_properties(CPUState *cs, > cpu->hyperv_vendor_id[2] = c->edx; > } > > + c = cpuid_find_entry(cpuid, HV_CPUID_INTERFACE, 0); > + if (c) { > + cpu->hyperv_interface_id[0] = c->eax; > + cpu->hyperv_interface_id[1] = c->ebx; > + cpu->hyperv_interface_id[2] = c->ecx; > + cpu->hyperv_interface_id[3] = c->edx; > + } > + Same question I sent for vendor id, version id, hyperv_limits: should this go to a separate patch, as it changes behavior of hv-passthrough? > c = cpuid_find_entry(cpuid, HV_CPUID_FEATURES, 0); > if (c) { > env->features[FEAT_HYPERV_EAX] = c->eax; > @@ -1314,11 +1321,10 @@ static int hyperv_handle_properties(CPUState *cs, > > c = &cpuid_ent[cpuid_i++]; > c->function = HV_CPUID_INTERFACE; > - memcpy(signature, "Hv#1\0\0\0\0\0\0\0\0", 12); > - c->eax = signature[0]; > - c->ebx = 0; > - c->ecx = 0; > - c->edx = 0; > + c->eax = cpu->hyperv_interface_id[0]; > + c->ebx = cpu->hyperv_interface_id[1]; > + c->ecx = cpu->hyperv_interface_id[2]; > + c->edx = cpu->hyperv_interface_id[3]; > > c = &cpuid_ent[cpuid_i++]; > c->function = HV_CPUID_VERSION; > -- > 2.25.4 >
diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 07e9da9e567e..16888125a30a 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -6638,6 +6638,12 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp) memcpy(cpu->hyperv_vendor_id, cpu->hyperv_vendor, len); } + /* 'Hv#1' interface identification*/ + cpu->hyperv_interface_id[0] = 0x31237648; + cpu->hyperv_interface_id[1] = 0; + cpu->hyperv_interface_id[2] = 0; + cpu->hyperv_interface_id[3] = 0; + if (cpu->ucode_rev == 0) { /* The default is the same as KVM's. */ if (IS_AMD_CPU(env)) { diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 903994818093..91edc54a268c 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -1660,6 +1660,7 @@ struct X86CPU { bool hyperv_passthrough; OnOffAuto hyperv_no_nonarch_cs; uint32_t hyperv_vendor_id[3]; + uint32_t hyperv_interface_id[4]; bool check_cpuid; bool enforce_cpuid; diff --git a/target/i386/kvm.c b/target/i386/kvm.c index 47779c5e1efd..a36c65100cd0 100644 --- a/target/i386/kvm.c +++ b/target/i386/kvm.c @@ -1188,7 +1188,6 @@ static int hyperv_handle_properties(CPUState *cs, CPUX86State *env = &cpu->env; struct kvm_cpuid2 *cpuid; struct kvm_cpuid_entry2 *c; - uint32_t signature[3]; uint32_t cpuid_i = 0; int r; @@ -1232,6 +1231,14 @@ static int hyperv_handle_properties(CPUState *cs, cpu->hyperv_vendor_id[2] = c->edx; } + c = cpuid_find_entry(cpuid, HV_CPUID_INTERFACE, 0); + if (c) { + cpu->hyperv_interface_id[0] = c->eax; + cpu->hyperv_interface_id[1] = c->ebx; + cpu->hyperv_interface_id[2] = c->ecx; + cpu->hyperv_interface_id[3] = c->edx; + } + c = cpuid_find_entry(cpuid, HV_CPUID_FEATURES, 0); if (c) { env->features[FEAT_HYPERV_EAX] = c->eax; @@ -1314,11 +1321,10 @@ static int hyperv_handle_properties(CPUState *cs, c = &cpuid_ent[cpuid_i++]; c->function = HV_CPUID_INTERFACE; - memcpy(signature, "Hv#1\0\0\0\0\0\0\0\0", 12); - c->eax = signature[0]; - c->ebx = 0; - c->ecx = 0; - c->edx = 0; + c->eax = cpu->hyperv_interface_id[0]; + c->ebx = cpu->hyperv_interface_id[1]; + c->ecx = cpu->hyperv_interface_id[2]; + c->edx = cpu->hyperv_interface_id[3]; c = &cpuid_ent[cpuid_i++]; c->function = HV_CPUID_VERSION;
As a preparation to expanding Hyper-V CPU features early, move hyperv_interface_id initialization to x86_cpu_realizefn(). Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> --- target/i386/cpu.c | 6 ++++++ target/i386/cpu.h | 1 + target/i386/kvm.c | 18 ++++++++++++------ 3 files changed, 19 insertions(+), 6 deletions(-)