Mac Unable To Find Driver For This Platform Acpi

#Unable To Find For This Platform Acpi Mac OS X As A#

Take a look at it and see what you can come up with. For several seconds or press the restart button. Panic/unable to find driver.

Unable To Find For This Platform Acpi Mac OS X As A

SomloFix VirtualBox Errors While Installing Mac OS X. Iatkos 5i 10.5.5 por format75 en categor&237 a OS X 10.7 Comentarios: 0Running Mac OS X as a QEMU/KVM Guest Gabriel L. Unable to find driver for this platform: 'ACPI' Debugger called.panic(cpu 0 caller 0x003a8d2f): Unable to find driver for this platform: 'ACPI'.

KVM: Patched version of the current KVM git master:Git clone git://git.kernel.org/pub/scm/virt/kvm/kvm.gitAny hacking and modification of the KVM source will happen under the kvm repo. I Just Want It Working, Right Now !OK, here's what you'll need (or skip to the technical details instead): 'reboot' works fine, 'halt or poweroff' just hangs.Feedback to: somlo at cmu dot edu 0. 'halt' command from grub works fine for me (grub-2.02beta2-r8). While creating a new virtual machine, you should do the following tasks Memory Size to 4 GB (Recommended) Disable Floppy disk.Created attachment 207841 ACPI dump for MacBook Pro Please find my ACPI dump attached. I hope you should get something from this article.

This causes each guest VCPU to always utilize 100% of a host core, regardless of the actual level of guest activity.2.2.2. Configure and build using something like:According to the spec (see V3, S25-3, pp25-8), under certain conditions (which happen to be met by the OS X idle thread), guest-mode MWAIT will always default to being treated as a NOP, never entering a low-power sleep state. QEMU: Patched version of the current QEMU git master.

The real-time performance of the OS X guest, but considering we're already running under virtualization, you can't lose what you ain't never had :)We'd have to pay attention to the fact that the OS X idle thread runs with interrupts disabled ( RFLAGS.IF=0), but sets %ecx=1 to make MWAIT wake on interrupt regardless. This may have a negative impact on e.g. An interesting observation is that, on single-processor systems, MWAIT behaves very much like HLT: there is no other (V)CPU to trigger the monitoring hardware, and therefore MWAIT will only wake when a hardware interrupt is asserted.If we attempted to emulate MWAIT as (something similar to) HLT, while continuing to treat MONITOR as a NOP, we might be able to reduce host CPU utilization at the price of having the MWAIT-based idle thread be somewhat 'sluggish' (waking up 'late', on hardware interrupt, as opposed to 'on time' when another VCPU writes to the monitored memory location). Once installed, the guest may be 'optimized' for power consumption and host CPU utilization by forcing it to fall back to a HLT-based idle thread.Assuming the requirement to run a completely unmodified OS X guest install, we must support the default MONITOR/MWAIT idle thread in production, and attempt to alleviate host CPU utilization without the option of falling back to the HLT-based version. As before, these are short, non-power-saving NOP instructions, and therefore each VCPU will utilize 100% of the available cycles of a physical core on the host.As a workaround, it is possible to force Mac OS X to revert to a HLT-based idle thread by removing the default MONITOR/MWAIT one:Sudo rm /System/Library/Extensions/AppleIntelCPUPowerManagement.kextThis reduces host core utilization to single digits during guest idle times, since the guest VCPUs are removed from scheduling and execution on the host while halted.Due to its simplicity and relative cleanliness, this combined approach may be a viable long term solution: NOP-based MONITOR/MWAIT emulation will allow booting Mac OS X from factory-default install media. The current handler for both instructions generates an Invalid Opcode exception, a behavior consistent with the non-support for the instructions advertised via CPUID.My current stable patch against KVM replaces the handler for MONITOR and MWAIT with one that emulates the NOP instruction (i.e., skips the current MONITOR or MWAIT and re-enters VM guest mode execution from the immediately following instruction).

a write to the monitored memory area from another CPU core will cause everyone else's (including the MONITOR-ing core's) corresponding cache line to be invalidated ( I state). MONITOR counts as a memory access, ensuring that the monitored memory area counts as a valid (i.e., M, E, or S state) cache entry on the respective CPU core, in addition to setting the 'armed' flag. A plausible approach could work like this: not all VCPUs are guaranteed to receive hardware (e.g., timer) interrupts that would wake them from MWAITThese issues are currently under investigation, so please stay tuned.Although the spec strongly warns against assuming any connection between the size of the memory chunk being monitored and the size of a cache line, it is obvious that MONITOR and MWAIT are implemented on top of the processor's cache coherence protocol (e.g., MESI). However, when booting on an SMP guest, OS X crashes with an 'HPET not found' panic, which could indicate any number of problems: The patch works well enough on a single-processor guest, reducing host CPU utilization during guest idle to about 15%.

It is true that the exact extent of the monitored memory area is advertised via CPUID, but OS X is already known to have a poor track record of honoring CPUID.This new experimental patch implements MONITOR/MWAIT by emulating the monitoring hardware on top of the KVM MMU, as described above. This approach has one major caveat: memory monitoring necessarily happens at page-level granularity, which is typically significantly larger than the the extent of a (few) cache line(s) typically used on real hardware. MWAIT acts as NOP if finds the monitor is 'disarmed' otherwise, it enters a C-state and waits for a triggering write, or interrupt, etc.A relatively straightforward way to emulate MONITOR and MWAIT in KVM would be to utilize the virtual MMU module to write-protect MONITOR-ed memory areas, and handle the subsequent write faults (by emulating the actual guest write from within the host, and updating the state of the emulated monitoring hardware accordingly).

KVM, which allow it to run guests at near-native performance levels. For certain architectures (such as x86_64), QEMU is able to take advantage of hardware virtualization features offered through e.g. I'm currently looking for ways to first explain, then debug this behavior.QEMU is a multi-architecture emulator running in user-space. Other times, as well as with any attempt at SMP higher than 2, we get the dreaded HPET panic.

This ioctl() call will only return to userspace if/when KVM encounters a VM exit it can't handle itself. Each QEMU VCPU thread makes an ioctl() call into the kernel (where it will be serviced by KVM), requesting that the VCPU be scheduled on a pyhsical core. The guest system's 'physical' memory is allocated as part of the virtual address space of the QEMU process, and various handlers for the emulated virtual hardware of the guest systems are prepared. QEMU starts as a user-mode process, launching one thread for each VCPU that will be part of the guest VM.

Otherwise, the VM exit reason is passed back to userspace by falling out of the ioctl() call, at which point QEMU must handle it as described above, before calling back into KVM again via the ioctl().A quick list of QEMU upstream resources might include: Whenever a VM exit (back to host mode) occurs, KVM attempts to handle the exit cause itself, and immediately re-enters VM guest mode if successful. Normally, it causes the physical core on which the thread is scheduled to enter VM guest mode (a.k.a. KVM handles the kernel-side of the ioctl() call made by each QEMU VCPU thread. Normally, when the userspace emulation is complete, the QEMU VCPU thread loops back to the spot where it calls into the kernel via the ioctl().

Mac Unable To Find Driver For This Platform Acpi