bool Lease::isExpired() const
{
AssertPtrReturn(m.get(), false);
if (!m->fBinding)
return (ASMDivU64ByU32RetU32(RTTimeMilliTS() - m->u64TimestampLeasingStarted, 1000)
> m->u32LeaseExpirationPeriod);
else
return (ASMDivU64ByU32RetU32(RTTimeMilliTS() - m->u64TimestampBindingStarted, 1000)
> m->u32BindExpirationPeriod);
}
/**
* Enables the KVM VCPU system-time structure.
*
* @returns VBox status code.
* @param pVM Pointer to the VM.
* @param pVCpu Pointer to the VMCPU.
*
* @remarks Don't do any release assertions here, these can be triggered by
* guest R0 code.
*/
VMMR3_INT_DECL(int) gimR3KvmEnableSystemTime(PVM pVM, PVMCPU pVCpu)
{
PGIMKVM pKvm = &pVM->gim.s.u.Kvm;
PGIMKVMCPU pKvmCpu = &pVCpu->gim.s.u.KvmCpu;
/*
* Validate the mapping address first.
*/
if (!PGMPhysIsGCPhysNormal(pVM, pKvmCpu->GCPhysSystemTime))
{
LogRel(("GIM: KVM: VCPU%3d: Invalid physical addr requested for mapping system-time struct. GCPhysSystemTime=%#RGp\n",
pVCpu->idCpu, pKvmCpu->GCPhysSystemTime));
return VERR_GIM_OPERATION_FAILED;
}
/*
* Construct the system-time struct.
*/
GIMKVMSYSTEMTIME SystemTime;
RT_ZERO(SystemTime);
SystemTime.u32Version = pKvmCpu->u32SystemTimeVersion;
SystemTime.u64NanoTS = pKvmCpu->uVirtNanoTS;
SystemTime.u64Tsc = pKvmCpu->uTsc;
SystemTime.fFlags = pKvmCpu->fSystemTimeFlags | GIM_KVM_SYSTEM_TIME_FLAGS_TSC_STABLE;
/*
* How the guest calculates the system time (nanoseconds):
*
* tsc = rdtsc - SysTime.u64Tsc
* if (SysTime.i8TscShift >= 0)
* tsc <<= i8TscShift;
* else
* tsc >>= -i8TscShift;
* time = ((tsc * SysTime.u32TscScale) >> 32) + SysTime.u64NanoTS
*/
uint64_t u64TscFreq = pKvm->cTscTicksPerSecond;
SystemTime.i8TscShift = 0;
while (u64TscFreq > 2 * RT_NS_1SEC_64)
{
u64TscFreq >>= 1;
SystemTime.i8TscShift--;
}
uint32_t uTscFreqLo = (uint32_t)u64TscFreq;
while (uTscFreqLo <= RT_NS_1SEC)
{
uTscFreqLo <<= 1;
SystemTime.i8TscShift++;
}
SystemTime.u32TscScale = ASMDivU64ByU32RetU32(RT_NS_1SEC_64 << 32, uTscFreqLo);
/*
* Update guest memory with the system-time struct.
*/
Assert(!(SystemTime.u32Version & UINT32_C(1)));
int rc = PGMPhysSimpleWriteGCPhys(pVM, pKvmCpu->GCPhysSystemTime, &SystemTime, sizeof(GIMKVMSYSTEMTIME));
if (RT_SUCCESS(rc))
{
LogRel(("GIM: KVM: VCPU%3d: Enabled system-time struct. at %#RGp - u32TscScale=%#RX32 i8TscShift=%d uVersion=%#RU32 "
"fFlags=%#x uTsc=%#RX64 uVirtNanoTS=%#RX64\n", pVCpu->idCpu, pKvmCpu->GCPhysSystemTime, SystemTime.u32TscScale,
SystemTime.i8TscShift, SystemTime.u32Version, SystemTime.fFlags, pKvmCpu->uTsc, pKvmCpu->uVirtNanoTS));
TMR3CpuTickParavirtEnable(pVM);
}
else
LogRel(("GIM: KVM: VCPU%3d: Failed to write system-time struct. at %#RGp. rc=%Rrc\n",
pVCpu->idCpu, pKvmCpu->GCPhysSystemTime, rc));
return rc;
}
