Hi guys
i encountered a problem when i test hyperv_connections case
the test log like below
lizhijian@haswell-OptiPlex-9020:~/lkp/kvm-unit-tests$ cat logs/hyperv_connections.log
timeout -k 1s --foreground 90s /home/lizhijian/lkp/qemu-colo/x86_64-softmmu/qemu-system-x86_64 -nodefaults -device pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial stdio -device pci-testdev -machine accel=kvm -kernel x86/hyperv_connections.flat -smp 2 -cpu kvm64,hv_synic -device hyperv-testdev # -initrd /tmp/tmp.I3s3a37Pi9
enabling apic
enabling apic
paging enabled
cr0 = 80010011
cr3 = 458000
cr4 = 20
SKIP: Hyper-V SynIC connections are not supported
SUMMARY: 1 tests, 1 skipped
I tracked the host kernel kvm module, kvm_hv_hypercall returned 0 when the code is HVCALL_SIGNAL_EVENT when i run this case.
but the test code does return HV_STATUS_INVALID_HYPERCALL_CODE at guest.
so i want to know either does this case require some special hardware platform(cpu fetures) or i miss something(module paramenter etc.) ?
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1202 int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
1203 {
1204 u64 param, ingpa, outgpa, ret;
1205 uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0;
1206 bool fast, longmode;
....
1241
1242 printk(KERN_ERR "code %x, rep_cnt %d, rep_idx %d\n", code, rep_cnt, rep_idx);
1243 /* Hypercall continuation is not supported yet */
1244 if (rep_cnt || rep_idx) {
1245 res = HV_STATUS_INVALID_HYPERCALL_CODE;
1246 printk(KERN_ERR "%s, %d: FUUUUUUUUUUUUK\n", __func__, __LINE__);
1247 goto set_result;
1248 }
1249
1250 switch (code) {
1251 case HVCALL_NOTIFY_LONG_SPIN_WAIT:
1252 kvm_vcpu_on_spin(vcpu);
1253 break;
1254 case HVCALL_POST_MESSAGE:
1255 case HVCALL_SIGNAL_EVENT:
1256 printk(KERN_ERR "%s, %d: vcpu_to_synic(vcpu)->active is %d, code %04x\n", __func__, __LINE__, vcpu_to_synic(vcpu)->active, code);
1257 /* don't bother userspace if it has no way to handle it */
1258 if (!vcpu_to_synic(vcpu)->active) {
1259 printk(KERN_ERR "%s, %d: FUUUUUUUUUUUU\n", __func__, __LINE__);
1260 res = HV_STATUS_INVALID_HYPERCALL_CODE;
1261 break;
1262 }
1263 vcpu->run->exit_reason = KVM_EXIT_HYPERV;
1264 vcpu->run->hyperv.type = KVM_EXIT_HYPERV_HCALL;
1265 vcpu->run->hyperv.u.hcall.input = param;
1266 vcpu->run->hyperv.u.hcall.params[0] = ingpa;
1267 vcpu->run->hyperv.u.hcall.params[1] = outgpa;
1268 vcpu->arch.complete_userspace_io =
1269 kvm_hv_hypercall_complete_userspace;
1270 return 0; /////// host will return from here
1271 default:
1272 printk(KERN_ERR "%s, %d: FUUUUUUUUUUUU\n", __func__, __LINE__);
1273 res = HV_STATUS_INVALID_HYPERCALL_CODE;
1274 break;
1275 }
1276
1277 set_result:
1278 printk(KERN_ERR "%s, %d: FUUUUUUUUUUUU\n", __func__, __LINE__);
1279 ret = res | (((u64)rep_done & 0xfff) << 32);
1280 kvm_hv_hypercall_set_result(vcpu, ret);
1281 return 1;
1282 }
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my test environmnet:
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lizhijian@haswell-OptiPlex-9020:~/lkp/kvm-unit-tests$ /home/lizhijian/lkp/qemu-colo/x86_64-softmmu/qemu-system-x86_64 --version
QEMU emulator version 2.9.91 (v2.10.0-rc1-23-gf22ab6c-dirty)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
lizhijian@haswell-OptiPlex-9020:~/lkp/kvm-unit-tests$ git log |head -1
commit 9e5e817be8634bd9800253f404aa9d53d0742131
lizhijian@haswell-OptiPlex-9020:~/lkp/kvm-unit-tests$ uname -a
Linux haswell-OptiPlex-9020 4.12.0 #24 SMP Fri Jul 21 13:21:49 CST 2017 x86_64 x86_64 x86_64 GNU/Linux
lizhijian@haswell-OptiPlex-9020:~/lkp/kvm-unit-tests$ lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 8
On-line CPU(s) list: 0-7
Thread(s) per core: 2
Core(s) per socket: 4
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 60
Model name: Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz
Stepping: 3
CPU MHz: 2696.923
CPU max MHz: 4000.0000
CPU min MHz: 800.0000
BogoMIPS: 7184.61
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 8192K
NUMA node0 CPU(s): 0-7
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm cpuid_fault epb tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid xsaveopt dtherm ida arat pln pts
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Thanks
