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vmm, arch: Move KVM HyperV emulation handling to shared CPUID code

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Move the code for populating the CPUID with KVM HyperV emulation details from
the per-vCPU CPUID handling code to the shared CPUID handling code.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2021-02-09 14:39:50 +00:00
parent 688ead51c6
commit ccdea0274c
2 changed files with 59 additions and 53 deletions
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52
arch/src/x86_64/mod.rs
View File

@ -341,58 +341,6 @@ pub fn configure_vcpu(
CpuidPatch::set_cpuid_reg(&mut cpuid, 0xb, None, CpuidReg::EDX, u32::from(id));
CpuidPatch::set_cpuid_reg(&mut cpuid, 0x1f, None, CpuidReg::EDX, u32::from(id));
if kvm_hyperv {
// Remove conflicting entries
cpuid.retain(|c| c.function != 0x4000_0000);
cpuid.retain(|c| c.function != 0x4000_0001);
// See "Hypervisor Top Level Functional Specification" for details
// Compliance with "Hv#1" requires leaves up to 0x4000_000a
cpuid
.push(CpuIdEntry {
function: 0x40000000,
eax: 0x4000000a, // Maximum cpuid leaf
ebx: 0x756e694c, // "Linu"
ecx: 0x564b2078, // "x KV"
edx: 0x7648204d, // "M Hv"
..Default::default()
})
.map_err(|_| Error::PopulatingCpuid)?;
cpuid
.push(CpuIdEntry {
function: 0x40000001,
eax: 0x31237648, // "Hv#1"
..Default::default()
})
.map_err(|_| Error::PopulatingCpuid)?;
cpuid
.push(CpuIdEntry {
function: 0x40000002,
eax: 0x3839, // "Build number"
ebx: 0xa0000, // "Version"
..Default::default()
})
.map_err(|_| Error::PopulatingCpuid)?;
cpuid
.push(CpuIdEntry {
function: 0x4000_0003,
eax: 1 << 1 // AccessPartitionReferenceCounter
| 1 << 2 // AccessSynicRegs
| 1 << 3 // AccessSyntheticTimerRegs
| 1 << 9, // AccessPartitionReferenceTsc
..Default::default()
})
.map_err(|_| Error::PopulatingCpuid)?;
for i in 0x4000_0004..=0x4000_000a {
cpuid
.push(CpuIdEntry {
function: i,
..Default::default()
})
.map_err(|_| Error::PopulatingCpuid)?;
}
}
fd.set_cpuid2(&cpuid)
.map_err(|e| Error::SetSupportedCpusFailed(e.into()))?;

60
vmm/src/cpu.rs
View File

@ -554,7 +554,13 @@ impl CpuManager {
#[cfg(target_arch = "x86_64")]
let cpuid = {
let phys_bits = physical_bits(config.max_phys_bits);
CpuManager::patch_cpuid(hypervisor, &config.topology, sgx_epc_sections, phys_bits)?
CpuManager::patch_cpuid(
hypervisor,
&config.topology,
sgx_epc_sections,
phys_bits,
config.kvm_hyperv,
)?
};
let device_manager = device_manager.lock().unwrap();
@ -604,6 +610,7 @@ impl CpuManager {
topology: &Option<CpuTopology>,
sgx_epc_sections: Option<Vec<SgxEpcSection>>,
phys_bits: u8,
kvm_hyperv: bool,
) -> Result<CpuId> {
let mut cpuid_patches = Vec::new();
@ -683,6 +690,57 @@ impl CpuManager {
.unwrap();
}
if kvm_hyperv {
// Remove conflicting entries
cpuid.retain(|c| c.function != 0x4000_0000);
cpuid.retain(|c| c.function != 0x4000_0001);
// See "Hypervisor Top Level Functional Specification" for details
// Compliance with "Hv#1" requires leaves up to 0x4000_000a
cpuid
.push(CpuIdEntry {
function: 0x40000000,
eax: 0x4000000a, // Maximum cpuid leaf
ebx: 0x756e694c, // "Linu"
ecx: 0x564b2078, // "x KV"
edx: 0x7648204d, // "M Hv"
..Default::default()
})
.unwrap();
cpuid
.push(CpuIdEntry {
function: 0x40000001,
eax: 0x31237648, // "Hv#1"
..Default::default()
})
.unwrap();
cpuid
.push(CpuIdEntry {
function: 0x40000002,
eax: 0x3839, // "Build number"
ebx: 0xa0000, // "Version"
..Default::default()
})
.unwrap();
cpuid
.push(CpuIdEntry {
function: 0x4000_0003,
eax: 1 << 1 // AccessPartitionReferenceCounter
| 1 << 2 // AccessSynicRegs
| 1 << 3 // AccessSyntheticTimerRegs
| 1 << 9, // AccessPartitionReferenceTsc
..Default::default()
})
.unwrap();
for i in 0x4000_0004..=0x4000_000a {
cpuid
.push(CpuIdEntry {
function: i,
..Default::default()
})
.unwrap();
}
}
Ok(cpuid)
}