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hyperv: Check for required features during VMBus probing

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Some hypervisors claim to implement/advertise Hyper-V i.e. Xen and
VirtualBox. Check for all required features when probing to prevent
loading on hypervisors that do not fully comply with Hyper-V
specifications.

Change-Id: I7c1188a433cad5eff91dcffe9520a55926d0f4b5
Reviewed-on: https://review.haiku-os.org/c/haiku/+/10400
Reviewed-by: Jérôme Duval <[email protected]>
Tested-by: Commit checker robot <[email protected]>
This commit is contained in:
John Davis
2026-03-02 17:33:22 +00:00
committed by Jérôme Duval
parent f0fd023b4b
commit 36021a5a3d
2 changed files with 37 additions and 0 deletions
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src/add-ons/kernel/bus_managers/hyperv/arch/x86/VMBus_x86.cpp
+11
View File
@@ -37,6 +37,17 @@ vmbus_detect_hyperv()
return B_ERROR;
}
// Check for required Hyper-V features
// Some hypervisors claim to be Hyper-V, but may not actually implement all features
get_cpuid(&cpuInfo, IA32_CPUID_LEAF_HV_FEAT_ID, 0);
TRACE("Hyper-V features: %08" B_PRIX32 ":%08" B_PRIX32 ":%08" B_PRIX32 ":%08" B_PRIX32 "\n",
cpuInfo.regs.eax, cpuInfo.regs.ebx, cpuInfo.regs.ecx, cpuInfo.regs.edx);
if ((cpuInfo.regs.eax & HV_CPUID_EAX_REQUIRED_FEATURES) == 0
|| (cpuInfo.regs.ebx & HV_CPUID_EBX_REQUIRED_FEATURES) == 0) {
TRACE("Missing required Hyper-V features\n");
return B_ERROR;
}
#ifdef TRACE_HYPERV
get_cpuid(&cpuInfo, IA32_CPUID_LEAF_HV_SYS_ID, 0);
TRACE("Hyper-V version: %d.%d.%d [SP%d]\n", cpuInfo.regs.ebx >> 16, cpuInfo.regs.ebx & 0xFFFF,
src/add-ons/kernel/bus_managers/hyperv/arch/x86/hyperv_cpu.h
+26
View File
@@ -18,6 +18,32 @@
// Hyper-V signature "Hv#1"
#define HV_CPUID_INTERFACE_ID 0x31237648
// Hyper-V x86 features from feature CPUID leaf, eax register
// https://learn.microsoft.com/en-us/virtualization/hyper-v-on-windows/tlfs/datatypes/hv_partition_privilege_mask
#define HV_CPUID_FEATURE_VP_RUNTIME (1 << 0)
#define HV_CPUID_FEATURE_TIME_REF_COUNTER (1 << 1)
#define HV_CPUID_FEATURE_SYNIC (1 << 2)
#define HV_CPUID_FEATURE_SYNTIMER (1 << 3)
#define HV_CPUID_FEATURE_APIC (1 << 4)
#define HV_CPUID_FEATURE_HYPERCALL (1 << 5)
#define HV_CPUID_FEATURE_VP_INDEX (1 << 6)
#define HV_CPUID_FEATURE_RESET (1 << 7)
#define HV_CPUID_FEATURE_STATS (1 << 8)
#define HV_CPUID_FEATURE_REFERENCE_TSC (1 << 9)
#define HV_CPUID_FEATURE_GUEST_IDLE (1 << 10)
#define HV_CPUID_FEATURE_FREQUENCY (1 << 11)
#define HV_CPUID_FEATURE_REENLIGHTMENT (1 << 13)
// Hyper-V x86 features from feature CPUID leaf, ebx register
#define HV_CPUID_FEATURE_HYPERCALL_POST_MESSAGE (1 << 4)
#define HV_CPUID_FEATURE_HYPERCALL_SIGNAL_EVENT (1 << 5)
// Required feature bits for VMBus operation
#define HV_CPUID_EAX_REQUIRED_FEATURES (HV_CPUID_FEATURE_SYNIC | HV_CPUID_FEATURE_SYNTIMER \
| HV_CPUID_FEATURE_HYPERCALL)
#define HV_CPUID_EBX_REQUIRED_FEATURES (HV_CPUID_FEATURE_HYPERCALL_POST_MESSAGE \
| HV_CPUID_FEATURE_HYPERCALL_SIGNAL_EVENT)
// MSR registers
#define IA32_MSR_HV_GUEST_OS_ID 0x40000000
#define IA32_MSR_HV_HYPERCALL 0x40000001